PartnerFacts
Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 10:46 AM ET

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William Porteous

Named as an officer, director or promoter on SEC Form D filings · VA, NY, WA · Oct 29, 2009 → Jul 20, 2026

13deals (issuers)
$1.02Breported sold
392investors
34Form D filings
2009–2026years on file
Follow this personLook further ↓PDF

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 3:02 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

William Porteous is listed as an executive officer and director on 34 SEC Form D filings by 13 issuers between Oct 2009 and Jul 2026. Largest by amount reported sold: Spire Global, Inc. (Vienna, VA — other technology — 2021–2026; $245M reported sold to 38 investors), RRE Ventures VIII, L.P. (New York, NY — pooled investment fund — 2021–2022; $233.5M reported sold to 83 investors), RRE Ventures VII, L.P. (New York, NY — pooled investment fund — 2017–2018; $218.8M reported sold to 49 investors), RRE Leaders Fund, L.P. (New York, NY — pooled investment fund — 2014–2015; $102.6M reported sold to 35 investors), Spaceflight Industries, Inc. (Herndon, VA — other technology — 2015–2019; $100.7M reported sold to 33 investors) and 8 more (all listed below).

What this means That is a lot of deals — 13 separate companies raised money with this person listed as executive officer and director, over about 17 years. Across those companies the filings report $1.02B sold in total.

Listed alongside James D. Robinson, IV (11 shared filings), Stuart Ellman (11 shared filings), Adam J. Maher (8 shared filings), Christopher Steed (8 shared filings), Julie Baker (8 shared filings) and 68 others.

What this means These are the other officers, directors or promoters the companies named on the same forms — the team around William. Each name links to their own page.

The issuers belong to 2 sponsor groups: Rre (2 issuers, $102.6M reported sold, 2014–2015) and Rre Leaders (2 issuers, $57.9M reported sold, 2017–2021).

What this means This person is listed across more than one sponsor team; each group page shows that team's full track record.

Public records searched: federal courts (CourtListener / RECAP), SEC enforcement releases, state securities regulators (AK, AL, AR, AZ, CA, CO, CT, DC, DE, FINRA, FL, GA, HI, ID, IL, KS, KY, LA, MA, MD, ME, MI, MO, MS, MT, NASAA, NC, ND, NH, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, WA, WI, WV, WY) — none found.

What this means Nothing turned up where we looked (3 sources). That does not prove there is nothing — it means none was found in those sources on that date.

We compared 34 public filings for William Porteous and found 10 differences, 2 worth asking the sponsor about: William Porteous appears on 3 deals that stopped filing before reaching their target; 5 Form Ds were filed more than 15 days after the first sale; and more below.

What this means These are differences between the sponsor's own SEC filings — both values, dates and sources are listed in Key records, section 4. Most have ordinary explanations; ask the sponsor.

What the community is saying

Community search for William Porteous has not run yet — it is #37,111 of 60,677 in line; searches run around the clock at the hosts' allowed rate. Searched so far: 702 names.

Community comments are quoted as written by their authors. Sources searched: Bing (site:reddit.com / site:biggerpockets.com) and Reddit's own search, plus DuckDuckGo/Brave/BiggerPockets search when they are answering.

Key records

Five things investors ask first. Items still in human review are counted, not shown.

1. Lawsuits

None found in sources searched — federal courts (CourtListener / RECAP), checked Oct 24, 2026

What was searched

Sources searched: CourtListener bulk data (RECAP dockets as of 2026-09-30; recall-first rule 10-24) — federal district + bankruptcy courts State courts: not covered (one-tap state court links under Look further). PACER: not searched. · Last checked Oct 24, 2026, 3:02 AM ET.

State courts: not covered (one-tap state court links under Look further). No state offers a lawful automated statewide source PartnerFacts can use today. Texas (re:SearchTX) terms prohibit storing results in a database open to third parties; New York (WebCivil) and Massachusetts (MassCourts) require a browser check that blocks scripted queries; California has no statewide index (58 county portals; Rule of Court 2.503 grants name-based access case by case); Florida, Utah and Illinois offer paid or partial access whose terms for automated use are unverified. Washington (dw.courts.wa.gov; bulk index reports under a JISC data-dissemination agreement), Delaware (CourtConnect; Court of Chancery not included) and Arizona (apps.azcourts.gov/publicaccess, which has an official channel to request high-volume access) are the candidates; PartnerFacts will request written permission before any automated search. Federal courts are searched through CourtListener / RECAP.

2. Regulatory actions

None found in sources searched — SEC enforcement releases (index scan as of Oct 24, 2026, 2:50 AM ET) · state securities regulators: 48 regulators (FINRA, NASAA, 37 states) — crawled Oct 24, 2026, 8:48 AM ET

What was searched

SEC enforcement searched: SEC litigation releases and administrative proceedings — respondent names in the sec.gov index titles (30,205 releases, 1995-09-19 to 2026-10-23); release text is read only to confirm a candidate. Names that appear only in the body of a release are not found. — Searched SEC litigation releases and administrative proceedings (1995→ / 2007→) (30,205 records as of Oct 24, 2026, 2:50 AM ET) — nothing matched William Porteous..

State securities regulators: Securities regulators searched (64,910 actions): FINRA (38,350 actions, 1995–2026), NASAA (31 actions, 2000–2026; listing starts 1997), AK Division of Banking and Securities (273 actions, 1971–2025), AL Securities Commission (880 actions, 2001–2026), AR Securities Department (1,305 actions, 1998–2026), AZ Corporation Commission Securities Division (411 actions, 2017–2026), CA DFPI (25 actions, 2007–2024; listing starts 2002 — 16 of 12,159 DFPI respondent pages read so far; sponsor-name matches are read first), CO Division of Securities (731 actions, 2001–2026; older years from the Internet Archive (snapshot of 2026-05-02)), CT Department of Banking Securities Division (940 actions, 2006–2026; older years from the Internet Archive (snapshot of 2026-04-22)), DC DISB Securities Bureau (25 actions, 2012–2026), DE DOJ Investor Protection Unit (257 actions, 1987–2026), FL Office of Financial Regulation (49 actions, 2018–2026), GA Secretary of State Securities Division (65 actions, 2015–2026; listing starts 2012), HI DCCA Securities Enforcement Branch (26 actions, 2012–2026), ID Department of Finance Securities Bureau (663 actions, 1994–2026), IL Secretary of State Securities Department (4,122 actions, 2003–2023), KS Insurance Department Securities Division (58 actions), KY Department of Financial Institutions (342 actions, 2005–2026), LA Office of Financial Institutions Securities Division (13 actions, 2010–2025; listing starts 2008), MA Secretary of the Commonwealth Securities Division (125 actions, 2012–2025; live site blocks automated access — loaded from the Internet Archive snapshot of 2026-02-04), MD Attorney General Securities Division (1,054 actions, 2004–2026), ME Office of Securities (539 actions, 2000–2026), MI LARA Corporations, Securities & Commercial Licensing Bureau (201 actions), MO Secretary of State Securities Division (919 actions, 1998–2026), MS Secretary of State Securities Division (209 actions, 1995–2026), MT Commissioner of Securities and Insurance (597 actions, 2000–2026), NC Secretary of State Securities Division (265 actions, 2004–2024), ND Securities Department (711 actions, 1990–2026; the regulator no longer publishes this list live — loaded from the Internet Archive snapshot of 2026-01-06), NH Bureau of Securities Regulation (402 actions, 2002–2026), NM Regulation and Licensing Department Securities Division (90 actions, 2010–2025), NV Secretary of State Securities Division (118 actions, 2018–2026), NY Attorney General Investor Protection Bureau (44 actions, 2012–2026), OH Division of Securities (327 actions, 1993–2006), OK Department of Securities (2,531 actions, 1998–2026), OR Division of Financial Regulation (589 actions, 1988–2026), PA Department of Banking and Securities (1,448 actions, 2008–2024; the regulator no longer publishes this list live — loaded from the Internet Archive snapshot of 2024-08-09), RI DBR Securities Division (98 actions, 2005–2025), SC Attorney General Securities Division (540 actions, 2006–2026), SD Division of Insurance – Securities Regulation (106 actions, 2017–2026), TN Department of Commerce and Insurance Securities Division (405 actions, 1992–2026), TX State Securities Board (936 actions, 1999–2026), UT Division of Securities (772 actions, 2000–2026; older years from the Internet Archive (snapshot of 2010-05-27)), VT DFR Securities Division (137 actions, 2010–2026), WA DFI (2,039 actions, 2001–2026), WI DFI Division of Securities (1,072 actions, 1998–2026), WV Securities Commission (State Auditor) (64 actions), WY Secretary of State Compliance Division (6 actions, 2016–2024) — last crawled Oct 24, 2026, 8:48 AM ET. No machine-readable public listing today for IA, IN, MN, NE, NJ, VA (see docs/state-regulators.md).

3. Bankruptcies

None found in sources searched — federal bankruptcy courts (CourtListener / RECAP), checked Oct 24, 2026

What was searched

Sources searched: Federal bankruptcy courts via CourtListener / RECAP archive (federal district courts, federal bankruptcy courts). State courts: not covered (one-tap state court links under Look further). PACER: not searched (RECAP only). · Last checked Oct 24, 2026, 3:02 AM ET.

State courts: not covered (one-tap state court links under Look further). No state offers a lawful automated statewide source PartnerFacts can use today. Texas (re:SearchTX) terms prohibit storing results in a database open to third parties; New York (WebCivil) and Massachusetts (MassCourts) require a browser check that blocks scripted queries; California has no statewide index (58 county portals; Rule of Court 2.503 grants name-based access case by case); Florida, Utah and Illinois offer paid or partial access whose terms for automated use are unverified. Washington (dw.courts.wa.gov; bulk index reports under a JISC data-dissemination agreement), Delaware (CourtConnect; Court of Chancery not included) and Arizona (apps.azcourts.gov/publicaccess, which has an official channel to request high-volume access) are the candidates; PartnerFacts will request written permission before any automated search. Federal courts are searched through CourtListener / RECAP.

4. Differences between public sources

Comparisons cover issuers and sponsor groups — see the issuer pages under Deals

10 differences found between the filings for William Porteous — 2 worth asking about (compared 34 filings on Oct 24, 2026)

Worth asking · Feb 25, 2014 – Nov 14, 2019

William Porteous appears on 3 deals that stopped filing before reaching their target

Spaceflight Industries, Inc. (last filing Nov 14, 2019; $100,656,523 sold of $210,656,523); RRE Leaders II, L.P. (last filing Feb 22, 2019; $57,900,000 sold of $150,000,000); RRE Ventures VI, L.P. (last filing Feb 25, 2014; $0 sold of $250,000,000). Each has no filing in more than two years and reported under half its target sold.

What this means An issuer whose last filing is more than two years old and reported under half its target sold. The raise may have closed early or quietly stopped. Ask what happened to each.

Spaceflight Industries, Inc. — PartnerFacts page ↗RRE Leaders II, L.P. — PartnerFacts page ↗RRE Ventures VI, L.P. — PartnerFacts page ↗
Sources
Worth asking · May 20, 2019 – Jul 20, 2026

5 Form Ds were filed more than 15 days after the first sale

Form D filed 115 days after the first sale — Ursa Space Systems Inc. · Form D filed 530 days after the first sale — HyperSpectral Corp. · Form D filed 66 days after the first sale — Ursa Space Systems Inc. · Form D filed 57 days after the first sale — HyperSpectral Corp. · Form D filed 51 days after the first sale — Ursa Space Systems Inc.

What this means Late notices are common and carry no penalty by themselves. A pattern of late paperwork is worth asking the sponsor about.

Form D · Jul 20, 2026 ↗Ursa Space Systems Inc. — PartnerFacts page ↗Form D · Oct 15, 2025 ↗HyperSpectral Corp. — PartnerFacts page ↗
Sources
Note · Oct 7, 2014 – Oct 15, 2025

12 offerings have no amendment in the last 12 months and may still be open

No amendment in the last 12 months on an offering that may still be open — HyperSpectral Corp. (latest filing Oct 15, 2025) · No amendment in the last 12 months on an offering that may still be open — HyperSpectral Corp. (latest filing Oct 15, 2025) · No amendment in the last 12 months on an offering that may still be open — Ursa Space Systems Inc. (latest filing Aug 16, 2024) · No amendment in the last 12 months on an offering that may still be open — RRE Ventures VIII, L.P. (latest filing Dec 27, 2022) · No amendment in the last 12 months on an offering that may still be open — Spaceflight Industries, Inc. (latest filing Nov 14, 2019) · and 7 more

What this means SEC rules expect a yearly amendment while an offering is still going. Ask the sponsor which of these raises have closed.

Form D · Oct 15, 2025 ↗HyperSpectral Corp. — PartnerFacts page ↗Form D · Oct 15, 2025 ↗Form D · Aug 16, 2024 ↗
Sources
Note · Nov 3, 2017 – Dec 27, 2022

4 offerings changed their target amount between filings

Offering amount changed between filings — RRE Ventures VIII, L.P. · Offering amount changed between filings — Ursa Space Systems Inc. · Offering amount changed between filings — Ursa Space Systems Inc. · Offering amount changed between filings — Spaceflight Industries, Inc.

What this means Targets change as deals grow or shrink. Ask whether later money has the same terms.

Form D (earlier) · May 13, 2021 ↗Form D/A (later) · Dec 27, 2022 ↗RRE Ventures VIII, L.P. — PartnerFacts page ↗Form D (earlier) · Sep 17, 2019 ↗
Sources
Note · Oct 29, 2009 – Oct 1, 2015

William Porteous is written 2 different ways on the filings

listed as "William Porteous" on 24 filings (from Oct 29, 2009), and "William D. Porteous" on 10 filings (from Oct 1, 2015).

What this means Same person, written differently — a middle name or suffix left off, or spelled another way. It is normal, but check that the full legal name matches your subscription documents.

Form D · Oct 29, 2009 ↗Form D/A · Oct 1, 2015 ↗William Porteous — PartnerFacts page ↗
Sources
Note · Aug 30, 2021 – Apr 20, 2026

Reported revenue range changed between filings — Spire Global, Inc.

"Decline to Disclose" (Aug 30, 2021); then "Over $100,000,000" (Mar 21, 2025); then "$25,000,001 - $100,000,000" (Apr 20, 2026).

What this means This is the size band the issuer picks for itself on the form. A change can mean the business grew or shrank — or that it chose not to say. Ask for current numbers.

Form D · Aug 30, 2021 ↗Form D · Mar 21, 2025 ↗Form D · Apr 20, 2026 ↗Spire Global, Inc. — PartnerFacts page ↗
Sources
Note · Jun 9, 2025

Same name, different state: "William D. Porteous" (PA) is a separate record

This page covers filings where the address state is VA or NY or WA. A separate record, "William D. Porteous" with address state PA, is listed on 1 filing — most recently by Lovelace AI Inc. (Jun 9, 2025). Both records have filings in the same period (Jun 9, 2025).

What this means Two records with one name were active at the same time. That can be one person listing different company addresses, or two different people. We keep them apart until a filing ties them together. Check both pages before you decide.

William D. Porteous (PA) — PartnerFacts page ↗Form D · Jun 9, 2025 ↗Lovelace AI Inc. — PartnerFacts page ↗William Porteous (VA,NY,WA) — this page ↗
Sources
Note · Dec 14, 2018 – Nov 14, 2019

Address moved from Seattle, WA to Herndon, VA — Spaceflight Industries, Inc.

The people listed on the Dec 14, 2018 filing give Seattle, WA; on the Nov 14, 2019 filing they give Herndon, VA.

What this means Businesses move; this just shows the two places and dates. If you were told one city and the forms say another, ask which is current.

Form D/A · Dec 14, 2018 ↗Form D · Nov 14, 2019 ↗Spaceflight Industries, Inc. — PartnerFacts page ↗
Sources
Note · Apr 8, 2015 – Nov 3, 2017

Address moved from Tukwila, WA to Seattle, WA — Spaceflight Industries, Inc.

The people listed on the Apr 8, 2015 filing give Tukwila, WA; on the Nov 3, 2017 filing they give Seattle, WA.

What this means Businesses move; this just shows the two places and dates. If you were told one city and the forms say another, ask which is current.

Form D/A · Apr 8, 2015 ↗Form D · Nov 3, 2017 ↗Spaceflight Industries, Inc. — PartnerFacts page ↗
Sources
Note · Oct 29, 2009 – Jul 20, 2026

William Porteous is listed with 3 different address states: NY, WA, VA

NY on 22 filings (Oct 29, 2009 to Jul 20, 2026); WA on 6 filings (Mar 10, 2015 to Dec 14, 2018); VA on 6 filings (Nov 14, 2019 to Apr 20, 2026).

What this means The address on a Form D is usually the company's, not the person's home, so this often just reflects different companies. It can also mean a move. Nothing wrong by itself.

Form D · Oct 29, 2009 ↗Form D · Mar 10, 2015 ↗Form D · Nov 14, 2019 ↗
Sources
What is compared

What is compared: every Form D and D/A we hold for this subject, side by side — filing dates vs. first-sale dates (the 15-day rule), amendment timing on open offerings (the yearly-amendment expectation), amounts sold, investor counts, offering amounts and minimums across amendments, industry and size bands, addresses, how each person's name and role is written, paid sellers' CRD numbers, and (for groups) where the member companies were formed and sit. Everything is as filed by the issuer; the SEC does not check it. Differences are common and usually have ordinary explanations — we show both values, the dates, and the source so you can ask. As of Oct 24, 2026.

5. Money to insiders

4 of 24 offerings report sales commissions totalling $16,964,312; 0 report finder's fees; 0 report proceeds to related persons. (includes amounts the issuer reported as estimates)

Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Jul 20, 2026 D
Ursa Space Systems Inc.
File 021-591453
$0$0$0None listed on this filingEDGAR ↗
Apr 20, 2026 D
Spire Global, Inc.
File 021-581162
$4,275,000$0$0Craig-Hallum Capital Group LLC BrokerCheck CRD 121395 ↗EDGAR ↗
Oct 15, 2025 D
HyperSpectral Corp.
File 021-560876
$0$0$0None listed on this filingEDGAR ↗
Oct 15, 2025 D
HyperSpectral Corp.
File 021-560928
$0$0$0None listed on this filingEDGAR ↗
Mar 21, 2025 D
Spire Global, Inc.
File 021-541842
$2,547,500$0$0Craig-Hallum Capital Group LLC BrokerCheck CRD 121395 ↗EDGAR ↗
Aug 16, 2024 D
Ursa Space Systems Inc.
File 021-521753
$0$0$0None listed on this filingEDGAR ↗
Mar 28, 2024 D
Ursa Space Systems Inc.
File 021-508973
$0$0$0None listed on this filingEDGAR ↗
Dec 27, 2022 D/A
RRE Ventures VIII, L.P.
File 021-399346
$0$0$0
An affiliate of the General Partner will receive a management fee payable by the Issuer quarterly in arrears. Such fee will be equal to a percentage of the Issuer's invested capital as specified in the Issuer's partnership agreement.
None listed on this filingEDGAR ↗
Dec 29, 2021 D
RRE Binance SPV, L.P.
File 021-427114
$0$0$0None listed on this filingEDGAR ↗
Aug 30, 2021 D
Spire Global, Inc.
File 021-411719
$7,141,812$0$0BofA Securities, Inc. BrokerCheck CRD 283942 ↗
Credit Suisse Securities (USA) LLC BrokerCheck CRD 816 ↗		EDGAR ↗
Nov 20, 2019 D/A
Ursa Space Systems Inc.
File 021-349044
$0$0$0None listed on this filingEDGAR ↗
Nov 14, 2019 D
Spaceflight Industries, Inc.
File 021-353424
$3,000,000 (est.)$0$0
All proceeds to be used for working capital.
Evercore Group L.L.C. BrokerCheck CRD 42405 ↗EDGAR ↗
Aug 2, 2019 D/A
Ursa Space Systems Inc.
File 021-343832
$0$0$0None listed on this filingEDGAR ↗
Feb 22, 2019 D/A
RRE Leaders II, L.P.
File 021-280878
$0$0$0
An affiliate of the General Partner will receive a management fee payable by the Issuer quarterly in arrears. Such fee will be equal to a percentage of the Issuer's invested capital as specified in the Issuer's partnership agreement.
None listed on this filingEDGAR ↗
Dec 14, 2018 D/A
Spaceflight Industries, Inc.
File 021-325834
$0$0$0
All proceeds to be used for working capital.
None listed on this filingEDGAR ↗
Jul 6, 2018 D
Ursa Space Systems Inc.
File 021-316178
$0$0$0None listed on this filingEDGAR ↗
Mar 27, 2018 D/A
Spaceflight Industries, Inc.
File 021-298091
$0$0$0
All proceeds to be used for working capital.
None listed on this filingEDGAR ↗
Feb 23, 2018 D/A
RRE Ventures VII, L.P.
File 021-280874
$0$0$0
An affiliate of the General Partner will receive a management fee payable by the Issuer quarterly in advance equal to a percentage of the Issuer's capital commitments or invested capital as specified in the Issuer's partnership agreement.
None listed on this filingEDGAR ↗
Jun 7, 2017 D
Yipit, Inc.
File 021-288216
$0$0$0None listed on this filingEDGAR ↗
Oct 1, 2015 D/A
RRE Leaders Fund, L.P.
File 021-225722
$0$0$0 (est.)
An affiliate of the General Partner will receive a management fee payable by the Issuer quarterly in advance. Such fee will be equal to a percentage of the Issuer's invested capital as specified in the Issuer's partnership agreement.
None listed on this filingEDGAR ↗
Apr 8, 2015 D/A
Spaceflight Industries, Inc.
File 021-235568
$0$0$0
All proceeds to be used for working capital.
None listed on this filingEDGAR ↗
Jun 5, 2014 D
PONTIFLEX INC
File 021-218661
$0$0$0None listed on this filingEDGAR ↗
Feb 25, 2014 D
RRE Ventures VI, L.P.
File 021-212486
$0$0$0 (est.)
An affiliate of the General Partner will receive a management fee payable by the Issuer quarterly in advance. Such fee will be equal to a percentage of the Issuer's aggregate capital commitments as specified in the Issuer's partnership agreement.
None listed on this filingEDGAR ↗
Oct 29, 2009 D
Data Robotics, Inc.
File 021-107175
$0$0$0None listed on this filingEDGAR ↗
How this is counted

Counts come from Form D Items 12–15 on the filings in our index (latest filing per offering; one offering = one SEC file number; an amendment updates its offering rather than adding one). "To insiders" = gross proceeds used for payments to executive officers, directors or promoters. "—" = not reported on that filing. Amounts marked (est.) were reported as estimates. "Paid to sell it" = sales compensation recipients named on that filing (Item 12), each linked to FINRA BrokerCheck when a CRD number is reported.

Counted across every filing this person is listed on (latest filing per offering, per issuer).

Deals 13

Every issuer that named William Porteous on a Form D, newest first. A Form D is the notice a company files after it starts selling a private investment.

US
Other Technology

Ursa Space Systems Inc.

Ithaca, NY · Jul 6, 2018 → Jul 20, 2026 · 8 filings
  • Jul 20, 2026 · D · $27,899,999 sold of $27,899,999 · 2 investors · min. No minimum reported · role: Director EDGAR ↗
  • Aug 16, 2024 · D · $1,321,025 sold of $6,000,000 · 4 investors · min. No minimum reported · role: Director EDGAR ↗
  • Mar 28, 2024 · D · $6,206,026 sold of $6,206,026 · 24 investors · min. No minimum reported · role: Director EDGAR ↗
  • Nov 20, 2019 · D/A · $15,010,304 sold of $15,010,304 · 19 investors · min. No minimum reported · role: Director EDGAR ↗
  • Sep 17, 2019 · D · $12,595,620 sold of $12,595,620 · 17 investors · min. No minimum reported · role: Director EDGAR ↗
  • Aug 2, 2019 · D/A · $2,830,000 sold of $2,830,000 · 12 investors · min. No minimum reported · role: Director EDGAR ↗
  • Jul 10, 2019 · D · $1,500,000 sold of $1,500,000 · 4 investors · min. No minimum reported · role: Director EDGAR ↗
  • Jul 6, 2018 · D · $5,449,986 sold of $5,700,000 · 5 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $27.9M from 24 investors (100% of the $27.9M target) as of the latest filing. William is listed as director on 8 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Other Technology / 506(b) (17,390 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

SG
Other Technology

Spire Global, Inc.

Vienna, VA · Aug 30, 2021 → Apr 20, 2026 · 3 filings
  • Apr 20, 2026 · D · $70,000,000 sold of $70,000,000 · 20 investors · min. No minimum reported · role: Director EDGAR ↗
  • Mar 21, 2025 · D · $40,000,000 sold of $40,000,000 · 17 investors · min. No minimum reported · role: Director EDGAR ↗
  • Aug 30, 2021 · D · $245,001,205 sold of $245,001,205 · 38 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $245M from 38 investors (100% of the $70M target) as of the latest filing. William is listed as director on 3 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Other Technology / 506(b) (17,390 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

HC
Other Technology

HyperSpectral Corp.

Alexandria, VA · Oct 15, 2025 → Oct 15, 2025 · 2 filings
  • Oct 15, 2025 · D · $6,728,749 sold of $7,000,000 · 13 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 15, 2025 · D · $12,096,459 sold of $12,157,170 · 40 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $12.1M from 40 investors (100% of the $7M target) as of the latest filing. William is listed as director on 2 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Other Technology / 506(b) (17,390 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

RV
Pooled Investment Fund

RRE Ventures VIII, L.P.

New York, NY · May 13, 2021 → Dec 27, 2022 · 2 filings
  • Dec 27, 2022 · D/A · $233,500,000 sold of $250,000,000 · 83 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗
  • May 13, 2021 · D · $0 sold of Indefinite · 0 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗

Raised $233.5M from 83 investors (93% of the $250M target) as of the latest filing. William is listed as executive officer on 2 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pooled Investment Fund / 506(b) (83,801 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

RB
Pooled Investment Fund · group: Rre Leaders

RRE Binance SPV, L.P.

New York, NY · Dec 29, 2021
  • Dec 29, 2021 · D · $0 sold of Indefinite · 0 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗

No sales reported yet as of the latest filing. William is listed as executive officer.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pooled Investment Fund / 506(b) (83,801 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

SI
Other Technology

Spaceflight Industries, Inc.

Herndon, VA · Mar 10, 2015 → Nov 14, 2019 · 7 filings
  • Nov 14, 2019 · D · $39,476,438 sold of $39,866,018 · 33 investors · min. No minimum reported · role: Director EDGAR ↗
  • Dec 14, 2018 · D/A · $22,770,000 sold of $29,900,000 · 8 investors · min. No minimum reported · role: Director EDGAR ↗
  • Nov 14, 2018 · D · $22,000,000 sold of $29,900,000 · 5 investors · min. No minimum reported · role: Director EDGAR ↗
  • Mar 27, 2018 · D/A · $100,656,523 sold of $210,656,523 · 18 investors · min. No minimum reported · role: Director EDGAR ↗
  • Nov 3, 2017 · D · $40,656,523 sold of $150,656,523 · 17 investors · min. No minimum reported · role: Director EDGAR ↗
  • Apr 8, 2015 · D/A · $20,249,998 sold of $20,749,998 · 6 investors · min. No minimum reported · role: Director EDGAR ↗
  • Mar 10, 2015 · D · $19,249,999 sold of $20,749,998 · 5 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $100.7M from 33 investors (100% of the $39.9M target) as of the latest filing. William is listed as director on 7 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Other Technology / 506(b) (17,390 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

RL
Pooled Investment Fund · group: Rre Leaders

RRE Leaders II, L.P.

New York, NY · Feb 16, 2017 → Feb 22, 2019 · 3 filings
  • Feb 22, 2019 · D/A · $57,900,000 sold of $150,000,000 · 27 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗
  • Feb 23, 2018 · D/A · $50,150,000 sold of $150,000,000 · 17 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗
  • Feb 16, 2017 · D · $0 sold of $150,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗

Raised $57.9M from 27 investors (39% of the $150M target) as of the latest filing. William is listed as executive officer on 3 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pooled Investment Fund / 506(b) (83,801 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

RV
Pooled Investment Fund

RRE Ventures VII, L.P.

New York, NY · Feb 16, 2017 → Feb 23, 2018 · 2 filings
  • Feb 23, 2018 · D/A · $218,750,000 sold of $250,000,000 · 49 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗
  • Feb 16, 2017 · D · $0 sold of $250,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗

Raised $218.8M from 49 investors (88% of the $250M target) as of the latest filing. William is listed as executive officer on 2 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pooled Investment Fund / 506(b) (83,801 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

Y
Other

Yipit, Inc.

New York, NY · Jun 7, 2017
  • Jun 7, 2017 · D · $9,750,000 sold of $9,750,000 · 10 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $9.75M from 21 investors (100% of the $9.75M target) as of the latest filing. William is listed as director.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Other / 506(b) (18,678 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

RL
Pooled Investment Fund · group: Rre

RRE Leaders Fund, L.P.

New York, NY · Oct 2, 2014 → Oct 1, 2015 · 2 filings
  • Oct 1, 2015 · D/A · $102,600,000 sold of $175,000,000 · 35 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗
  • Oct 2, 2014 · D · $0 sold of $175,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗

Raised $102.6M from 35 investors (59% of the $175M target) as of the latest filing. William is listed as executive officer on 2 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pooled Investment Fund / 506(b) (83,801 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

P
Other Technology

PONTIFLEX INC

Brooklyn, NY · Jun 5, 2014
  • Jun 5, 2014 · D · $1,250,000 sold of $1,250,000 · 7 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $6.25M from 8 investors (100% of the $1.25M target) as of the latest filing. William is listed as director.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Other Technology / 506(b) (17,390 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

RV
Pooled Investment Fund · group: Rre

RRE Ventures VI, L.P.

New York, NY · Feb 25, 2014
  • Feb 25, 2014 · D · $0 sold of $250,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Principal of the General Partner of the Issuer) EDGAR ↗

No sales reported yet as of the latest filing. William is listed as executive officer.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pooled Investment Fund / 506(b) (83,801 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

DR
Other Technology

Data Robotics, Inc.

Santa Clara, CA · Oct 29, 2009
  • Oct 29, 2009 · D · $9,974,743 sold of $9,974,743 · 34 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $9.97M from 34 investors (100% of the $9.97M target) as of the latest filing. William is listed as director.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer.

Other pages with the same name (1)

Separate person records under the same name, not combined with this page. Each line says whether it shares an issuer with this record.

People around William 40

Officers, directors, promoters and management entities named on the same filings, as of Oct 23, 2026, 5:45 PM ET. Showing the 40 with the most shared filings.

RL
Management entity

RRE Leaders GP II, LLC

Executive Officer · 4 shared filings (2 issuers)

Listed on the same filings as William Porteous. Their page shows their other deals.

RL
Management entity

RRE Leaders GP, LLC

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

RV
Management entity

RRE Ventures GP VII, LLC

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

RV
Management entity

RRE Ventures GP VIII, LLC

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

RV
Management entity

RRE Ventures GP VI, LLC

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

SE
No photo found yet (own website and image search run after this page is viewed)
Person

Stuart Ellman

Executive Officer · 11 shared filings (6 issuers) · also on 24 other issuers

Stuart Ellman is on 30 issuers in total — a repeat sponsor. Their page lists every one.

JR
No photo found (searched own website, image search on Oct 24, 2026)
Person

James D. Robinson, IV

Executive Officer · 11 shared filings (6 issuers) · also on 17 other issuers

James D. Robinson, IV is on 23 issuers in total — a repeat sponsor. Their page lists every one.

RR
No photo found yet (own website and image search run after this page is viewed)
Person

Raju Rishi

Executive Officer · 8 shared filings (4 issuers) · also on 12 other issuers

Raju Rishi is on 16 issuers in total — a repeat sponsor. Their page lists every one.

AM
No photo found yet (own website and image search run after this page is viewed)
Person

Adam J. Maher

Executive Officer, Director · 8 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

JB
No photo found yet (own website and image search run after this page is viewed)
Person

Julie Baker

Executive Officer, Director · 8 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

CS
No photo found yet (own website and image search run after this page is viewed)
Person

Christopher Steed

Director · 8 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

GK
No photo found yet (own website and image search run after this page is viewed)
Person

Gabriel Kompkoff

Director · 6 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

AR
No photo found yet (own website and image search run after this page is viewed)
Person

Ajay Royan

Director · 5 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as William Porteous. Their page shows their other deals.

DE
No photo found yet (own website and image search run after this page is viewed)
Person

Derek Edinger

Executive Officer · 5 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

TE
No photo found yet (own website and image search run after this page is viewed)
Person

Tom Edwards

Executive Officer · 4 shared filings (1 issuer) · also on 2 other issuers

Listed on the same filings as William Porteous. Their page shows their other deals.

MJ
No photo found yet (own website and image search run after this page is viewed)
Person

Marian Joh

Director, Promoter · 4 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

JA
No photo found yet (own website and image search run after this page is viewed)
Person

Jason Andrews

Executive Officer, Director, Promoter · 4 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as William Porteous. Their page shows their other deals.

MC
No photo found yet (own website and image search run after this page is viewed)
Person

Matt O'Connell

Director · 4 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

BT
No photo found yet (own website and image search run after this page is viewed)
Person

Brian O'Toole

Executive Officer, Director · 3 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as William Porteous. Their page shows their other deals.

MS
No photo found yet (own website and image search run after this page is viewed)
Person

Mark Spoto

Director · 3 shared filings (2 issuers) · also on 8 other issuers

Mark Spoto is on 10 issuers in total — a repeat sponsor. Their page lists every one.

TN
No photo found yet (own website and image search run after this page is viewed)
Person

Tom Neary

Executive Officer · 3 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as William Porteous. Their page shows their other deals.

IH
No photo found yet (own website and image search run after this page is viewed)
Person

Indra Hornsby

Executive Officer · 3 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

PG
No photo found yet (own website and image search run after this page is viewed)
Person

Paul Graziani

Director · 3 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

PP
No photo found yet (own website and image search run after this page is viewed)
Person

Peter Platzer

Executive Officer, Director · 3 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

TC
No photo found yet (own website and image search run after this page is viewed)
Person

Theresa Condor

Executive Officer, Director · 3 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

SM
No photo found yet (own website and image search run after this page is viewed)
Person

Stephen Messer

Director · 3 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

EW
No photo found yet (own website and image search run after this page is viewed)
Person

Eric Wiesen

Executive Officer · 2 shared filings (2 issuers) · also on 9 other issuers

Eric Wiesen is on 11 issuers in total — a repeat sponsor. Their page lists every one.

DF
No photo found yet (own website and image search run after this page is viewed)
Person

Daniel Freeman

Director · 2 shared filings (1 issuer) · also on 3 other issuers

Listed on the same filings as William Porteous. Their page shows their other deals.

VL
No photo found yet (own website and image search run after this page is viewed)
Person

Vincent Lubsey

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

JL
No photo found yet (own website and image search run after this page is viewed)
Person

Juan Lopez

Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

MT
No photo found yet (own website and image search run after this page is viewed)
Person

Matthew Theurer

Executive Officer, Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

LS
No photo found yet (own website and image search run after this page is viewed)
Person

Lauren Stack

Executive Officer, Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

RF
No photo found yet (own website and image search run after this page is viewed)
Person

Richard Fade

Director · 2 shared filings (1 issuer) · also on 8 other issuers

Richard Fade is on 9 issuers in total — a repeat sponsor. Their page lists every one.

JA
No photo found yet (own website and image search run after this page is viewed)
Person

Joan Amble

Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

CB
No photo found yet (own website and image search run after this page is viewed)
Person

Chuck Beames

Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

CB
No photo found yet (own website and image search run after this page is viewed)
Person

Curt Blake

Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

RN
No photo found yet (own website and image search run after this page is viewed)
Person

Rakesh Narasimhan

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

TK
No photo found yet (own website and image search run after this page is viewed)
Person

Thomas Krywe

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

DH
No photo found yet (own website and image search run after this page is viewed)
Person

Dirk Hoke

Director · 2 shared filings (1 issuer)

Listed on the same filings as William Porteous. Their page shows their other deals.

DJ
No photo found yet (own website and image search run after this page is viewed)
Person

David Jones

Director · 2 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as William Porteous. Their page shows their other deals.

The team behind the deals

R
Sponsor group

Rre

2 issuers · 3 filings · $102.6M reported sold · 2014–2015

One team, 2 deal companies. William Porteous is listed on 2 of them.

Sources

Issuers are grouped when their Form D filings share related persons, a management entity or a business address (automatic match from the filings). "Listed" marks the issuers that name William Porteous.

RL
Sponsor group

Rre Leaders

2 issuers · 4 filings · $57.9M reported sold · 2017–2021

One team, 2 deal companies. William Porteous is listed on 2 of them.

Sources

Issuers are grouped when their Form D filings share related persons, a management entity or a business address (automatic match from the filings). "Listed" marks the issuers that name William Porteous.

Same business address

51 other issuers file from the same address (first 50 shown)

A shared address can mean the same team, a shared office building or a registered agent. It is a lead, not a conclusion.

Registrations and other filings

Business registration (state registry / Secretary of State)

Individuals are not matched to business registrations — registries list companies, and a name alone is not enough to tie a person to one. Officers and managers appear by name inside each matched company's record on the issuer pages. Registries searched: AL (Alabama Secretary of State — Business Entity Records (arc-sos.state.al.us), searched by issuer name, data as of Oct 24, 2026); CO (Colorado Secretary of State — Business Entities in Colorado (data.colorado.gov), data as of Oct 23, 2026); CT (Connecticut Secretary of the State — Business Registry (data.ct.gov), data as of Oct 24, 2026); FL (Florida Department of State, Division of Corporations — quarterly corporate data file (Sunbiz), data as of Oct 7, 2026); KY (Kentucky Secretary of State — Business Entity Search (sosbes.sos.ky.gov), searched by issuer name, data as of Oct 24, 2026); NY (New York Department of State — Corporations and Other Entities (data.ny.gov: All Filings + Active Corporations), data as of Oct 20, 2026); OR (Oregon Secretary of State — Active Businesses, All (data.oregon.gov), data as of Oct 20, 2026); PA (Pennsylvania Department of State — Registered Businesses, Current (data.pa.gov), data as of Oct 6, 2026); TX (Texas Comptroller — Active Franchise Taxpayers incl. Secretary of State file data (data.texas.gov), data as of Oct 24, 2026). Registries of other states have not been searched: many publish no bulk file and require a CAPTCHA or bot challenge on their search page, which we do not bypass (Delaware, for example, offers no public bulk file).

Adviser registration (Form ADV)

None of the 13 issuers this person is listed on appears in Form ADV (searched 24,962 advisers as of Oct 2, 2026). A person is never an adviser firm; Form ADV is checked for the issuers and the management companies they are listed with.

Other offering types (Regulation A and Regulation Crowdfunding)

Searched SEC Regulation A Data Sets (Forms 1-A, 1-K, 1-Z; 2015 Q2 → 2026 Q3); SEC Crowdfunding Offerings Data Sets (Form C family; 2016 Q2 → 2026 Q3); EDGAR form index for 2026 Q3 → 2026 Q4 (51,358 records as of Oct 23, 2026, 8:41 PM ET) — nothing matched this name.

Property records none — individuals are not matched

Property records are matched to companies only, never to individuals, so none are matched to William Porteous by design. Searched property records in Hillsborough County FL (Clerk recorded-document index Oct 14, 2026 to Oct 15, 2026 + FL DOR 2026 ownership roll), Miami-Dade County FL (FL DOR 2026 ownership roll), Harris County TX (HCAD 2026 ownership roll), Dallas County TX (DCAD 2026 ownership roll), New York City ACRIS documents and PLUTO ownership rows already retrieved for other issuers, Cook County IL sale and ownership rows already retrieved for other issuers (814,874 records as of Oct 23, 2026, 8:59 PM ET) for the 13 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers William Porteous is listed on: none on file. No website or social profile named in Spire Global, Inc.'s SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #30,980 of 374,652 in line (1,386 issuers searched so far). One-tap searches: Look further ↓

Look further

One-tap searches on sites we do not index ourselves, with the name pre-filled (Vienna, VA). Each opens in a new tab; what you find there is not verified by PartnerFacts.

Social and web

LinkedIn people search ↗Instagram ↗X (Twitter) ↗Facebook ↗YouTube ↗Google ↗Google Images ↗Google News ↗Meta Ad Library ↗

Courts

CourtListener / RECAP (federal) ↗PACER case locator (federal, login) ↗Virginia state courts — find the court ↗New York WebCivil Supreme ↗Washington Courts case search (dw.courts.wa.gov) ↗California — find the county court ↗Los Angeles Superior Court case search ↗

Securities regulators

SEC EDGAR full-text search ↗SEC action look-up ↗FINRA BrokerCheck ↗SEC IAPD adviser search ↗

Business registries

Virginia Secretary of State business search ↗New York Secretary of State business search ↗Washington Secretary of State business search ↗California Secretary of State business search ↗OpenCorporates ↗

Change history

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