PartnerFacts
Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 10:50 AM ET

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DK
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Doug Koo

Named as an officer, director or promoter on SEC Form D filings · CA, PA · Apr 10, 2014 → Nov 22, 2024

9deals (issuers)
$351.4Mreported sold
182investors
16Form D filings
2014–2024years on file
Follow this personLook further ↓PDF

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:31 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

Doug Koo is listed as an executive officer and director on 16 SEC Form D filings by 9 issuers between Apr 2014 and Nov 2024. Largest by amount reported sold: Cortex, Inc. (Menlo Park, CA — industry reported as "Other" — 2023; $133.4M reported sold to 47 investors), CORTICA INC. (San Diego, CA — other health care — 2023–2024; $114.7M reported sold to 34 investors), ADVANCED CARDIAC THERAPEUTICS INC (Santa Clara, CA — other health care — 2014–2017; $45M reported sold to 26 investors), SPIROX, INC. (Menlo Park, CA — other technology — 2015–2016; $44.9M reported sold to 26 investors), MVRx, Inc. (San Mateo, CA — other health care — 2020; $6.81M reported sold to 24 investors) and 4 more (all listed below).

What this means A repeat sponsor — 9 separate companies raised money with this person listed as executive officer and director, over about 10 years. Across those companies the filings report $351.4M sold in total.

Listed alongside Duke Rohlen (9 shared filings), Aftab Kherani (7 shared filings), Ryan Drant (5 shared filings), Anthony Natale (4 shared filings), Anurag Kondapalli (4 shared filings) and 38 others.

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

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 16 public filings for Doug Koo and found 9 differences: Doug Koo appears on 1 deal that stopped filing before reaching its 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 Doug Koo has not run yet — it is #39,568 of 61,858 in line; searches run around the clock at the hosts' allowed rate. Searched so far: 723 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, 2:31 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 Doug Koo..

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, 2:31 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

9 differences found between the filings for Doug Koo (compared 16 filings on Oct 24, 2026)

Note · Oct 30, 2019

Doug Koo appears on 1 deal that stopped filing before reaching its target

Verix Health, Inc. (last filing Oct 30, 2019; $1,499,996 sold of $8,000,000). 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.

Verix Health, Inc. — PartnerFacts page ↗
Sources
Note · Mar 14, 2016 – Feb 11, 2021

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

Form D filed 17 days after the first sale — Atriomx, Inc. · Form D filed 19 days after the first sale — Serpex Medical Inc. · Form D filed 17 days after the first sale — MVRx, Inc. · Form D filed 23 days after the first sale — Verix Health, Inc. · Form D filed 36 days after the first sale — SPIROX, 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 · Feb 11, 2021 ↗Atriomx, Inc. — PartnerFacts page ↗Form D · Aug 3, 2020 ↗Serpex Medical Inc. — PartnerFacts page ↗
Sources
Note · Apr 3, 2014 – Dec 7, 2023

9 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 — Cortex, Inc. (latest filing Dec 7, 2023) · No amendment in the last 12 months on an offering that may still be open — CORTICA INC. (latest filing Apr 25, 2023) · No amendment in the last 12 months on an offering that may still be open — MVRx, Inc. (latest filing Apr 23, 2020) · No amendment in the last 12 months on an offering that may still be open — Verix Health, Inc. (latest filing Oct 30, 2019) · No amendment in the last 12 months on an offering that may still be open — ADVANCED CARDIAC THERAPEUTICS INC (latest filing May 8, 2017) · and 4 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 · Dec 7, 2023 ↗Cortex, Inc. — PartnerFacts page ↗Form D · Apr 25, 2023 ↗CORTICA INC. — PartnerFacts page ↗
Sources
Note · Aug 3, 2020 – Jun 4, 2021

Doug Koo's role changed at Serpex Medical Inc.: executive officer, director → executive officer

The Aug 3, 2020 filing lists Doug Koo as executive officer, director; the Jun 4, 2021 Form D lists executive officer.

What this means Roles on Form D are self-reported by the issuer. A change can mean a real change in who runs the company, or just a different box ticked. Ask who makes decisions today.

Form D · Aug 3, 2020 ↗Form D · Jun 4, 2021 ↗Doug Koo — PartnerFacts page ↗Serpex Medical Inc. — PartnerFacts page ↗
Sources
Note · Apr 25, 2023 – Oct 2, 2023

Offering amount changed between filings — CORTICA INC.

The Apr 25, 2023 filing says $89,216,329 offered; the Oct 2, 2023 Form D/A says $114,716,314.

What this means The target raise changed. Raising the cap is common when a deal grows; ask whether the extra money has the same terms and use.

Form D (earlier) · Apr 25, 2023 ↗Form D/A (later) · Oct 2, 2023 ↗CORTICA INC. — PartnerFacts page ↗
Sources
Note · Apr 29, 2015 – Jun 23, 2015

Minimum investment changed between filings — SPIROX, INC.

The Apr 29, 2015 filing lists a minimum of $250,000; the Jun 23, 2015 Form D/A lists $25,000.

What this means A different minimum usually means the offering terms changed. Check which terms apply to you.

Form D (earlier) · Apr 29, 2015 ↗Form D/A (later) · Jun 23, 2015 ↗SPIROX, INC. — PartnerFacts page ↗
Sources
Note · Apr 10, 2014 – May 8, 2017

Industry group changed between filings — ADVANCED CARDIAC THERAPEUTICS INC

"Other" (Apr 10, 2014); then "Other Health Care" (May 8, 2017).

What this means The issuer described its business differently on different forms. Often it is just a different box ticked; sometimes the deal itself changed. Ask which business your money is in.

Form D · Apr 10, 2014 ↗Form D · May 8, 2017 ↗ADVANCED CARDIAC THERAPEUTICS INC — PartnerFacts page ↗
Sources
Note · Apr 10, 2014 – May 8, 2017

Address moved from Menlo Park, CA to Santa Clara, CA — ADVANCED CARDIAC THERAPEUTICS INC

The people listed on the Apr 10, 2014 filing give Menlo Park, CA; on the May 8, 2017 filing they give Santa Clara, CA.

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 · Apr 10, 2014 ↗Form D · May 8, 2017 ↗ADVANCED CARDIAC THERAPEUTICS INC — PartnerFacts page ↗
Sources
Note · Apr 10, 2014 – Nov 22, 2024

Doug Koo is listed with 2 different address states: CA, PA

CA on 15 filings (Apr 10, 2014 to Nov 22, 2024); PA on 1 filing (Oct 30, 2019).

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 · Apr 10, 2014 ↗Form D · Oct 30, 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

None reported on 14 offerings — no sales commissions, finder's fees or proceeds to insiders

Per-offering detail
Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Nov 22, 2024 D
CORTICA INC.
File 021-530275
$0$0$0None listed on this filingEDGAR ↗
Dec 7, 2023 D
Cortex, Inc.
File 021-499065
$0$0$0None listed on this filingEDGAR ↗
Oct 2, 2023 D/A
CORTICA INC.
File 021-479914
$0$0$0None listed on this filingEDGAR ↗
Apr 25, 2023 D
CORTICA INC.
File 021-479915
$0$0$0None listed on this filingEDGAR ↗
Jun 4, 2021 D
Serpex Medical Inc.
File 021-401733
$0$0$0None listed on this filingEDGAR ↗
Feb 11, 2021 D
Atriomx, Inc.
File 021-389108
$0$0$0None listed on this filingEDGAR ↗
Aug 3, 2020 D
Serpex Medical Inc.
File 021-372382
$0$0$0None listed on this filingEDGAR ↗
Apr 23, 2020 D
MVRx, Inc.
File 021-365642
$0$0$0None listed on this filingEDGAR ↗
Oct 30, 2019 D
Verix Health, Inc.
File 021-352156
$0$0$0None listed on this filingEDGAR ↗
May 8, 2017 D
ADVANCED CARDIAC THERAPEUTICS INC
File 021-286216
$0$0$0None listed on this filingEDGAR ↗
Apr 19, 2016 D
SPIROX, INC.
File 021-261587
$0$0$0None listed on this filingEDGAR ↗
Jun 23, 2015 D/A
SPIROX, INC.
File 021-238857
$0$0$0None listed on this filingEDGAR ↗
Aug 18, 2014 D
MIMOSA MEDICAL, INC.
File 021-223175
$0$0$0None listed on this filingEDGAR ↗
Apr 10, 2014 D
ADVANCED CARDIAC THERAPEUTICS INC
File 021-215313
$0$0$0None listed on this filingEDGAR ↗

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 9

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

C
Other Health Care

CORTICA INC.

San Diego, CA · Apr 25, 2023 → Nov 22, 2024 · 4 filings
  • Nov 22, 2024 · D · $80,999,998 sold of $80,999,998 · 5 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 2, 2023 · D/A · $114,716,314 sold of $114,716,314 · 21 investors · min. No minimum reported · role: Director EDGAR ↗
  • Apr 25, 2023 · D · $15,227,043 sold of $17,537,009 · 34 investors · min. No minimum reported · role: Director EDGAR ↗
  • Apr 25, 2023 · D · $75,666,318 sold of $89,216,329 · 16 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $114.7M from 34 investors (100% of the $81M target) as of the latest filing. Doug is listed as director on 4 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 Health Care / 506(b) (4,189 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.

C
Other

Cortex, Inc.

Menlo Park, CA · Dec 7, 2023
  • Dec 7, 2023 · D · $133,400,250 sold of $222,525,000 · 47 investors · min. No minimum reported · role: Executive Officer EDGAR ↗

Raised $133.4M from 47 investors (60% of the $222.5M target) as of the latest filing. Doug 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: 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.

SM
Biotechnology

Serpex Medical Inc.

Santa Clara, CA · Aug 3, 2020 → Jun 4, 2021 · 2 filings
  • Jun 4, 2021 · D · $1,500,000 sold of $1,500,000 · 5 investors · min. $1 · role: Executive Officer EDGAR ↗
  • Aug 3, 2020 · D · $3,050,126 sold of $3,050,126 · 9 investors · min. $1 · role: Executive Officer, Director EDGAR ↗

Raised $3.05M from 9 investors (100% of the $1.5M target) as of the latest filing. Doug is listed as executive officer, 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: Biotechnology / 506(b) (3,253 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.

A
Other

Atriomx, Inc.

Menlo Park, CA · Feb 11, 2021
  • Feb 11, 2021 · D · $1,000,000 sold of $1,000,000 · 3 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $1M from 3 investors (100% of the $1M target) as of the latest filing. Doug 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.

M
Other Health Care

MVRx, Inc.

San Mateo, CA · Apr 23, 2020
  • Apr 23, 2020 · D · $5,883,289 sold of $7,733,315 · 11 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $6.81M from 24 investors (88% of the $7.73M target) as of the latest filing. Doug 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 Health Care / 506(b) (4,189 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.

VH
Biotechnology

Verix Health, Inc.

Philadelphia, PA · Oct 30, 2019
  • Oct 30, 2019 · D · $1,499,996 sold of $8,000,000 · 4 investors · min. No minimum reported · role: Executive Officer (Mr. Koo is the Chief Financial Officer of the Issuer.) EDGAR ↗

Raised $1.5M from 4 investors (19% of the $8M target) as of the latest filing. Doug 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: Biotechnology / 506(b) (3,253 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.

AC
Other Health Care

ADVANCED CARDIAC THERAPEUTICS INC

Santa Clara, CA · Apr 10, 2014 → May 8, 2017 · 2 filings
  • May 8, 2017 · D · $44,999,998 sold of $45,999,997 · 4 investors · min. No minimum reported · role: Executive Officer EDGAR ↗
  • Apr 10, 2014 · D · $7,300,000 sold of $8,000,000 · 6 investors · min. No minimum reported · role: Executive Officer EDGAR ↗

Raised $45M from 26 investors (98% of the $46M target) as of the latest filing. Doug 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: Other Health Care / 506(b) (4,189 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.

S
Other Technology

SPIROX, INC.

Menlo Park, CA · Apr 29, 2015 → Apr 19, 2016 · 3 filings
  • Apr 19, 2016 · D · $44,897,989 sold of $45,000,000 · 22 investors · min. No minimum reported · role: Executive Officer (Secretary) EDGAR ↗
  • Jun 23, 2015 · D/A · $18,499,997 sold of $18,500,000 · 20 investors · min. $25,000 · role: Executive Officer (Secretary) EDGAR ↗
  • Apr 29, 2015 · D · $17,499,997 sold of $18,500,000 · 9 investors · min. $250,000 · role: Executive Officer (Secretary) EDGAR ↗

Raised $44.9M from 26 investors (100% of the $45M target) as of the latest filing. Doug 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: 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.

MM
Other Health Care

MIMOSA MEDICAL, INC.

Menlo Park, CA · Aug 18, 2014
  • Aug 18, 2014 · D · $445,000 sold of $500,000 · 9 investors · min. No minimum reported · role: Executive Officer EDGAR ↗

Raised $1.05M from 9 investors (100% of the $500K target) as of the latest filing. Doug 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: Other Health Care / 506(b) (4,189 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.

People around Doug 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.

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

Duke Rohlen

Executive Officer, Director · 9 shared filings (6 issuers) · also on 4 other issuers

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

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

Aftab Kherani

Director, Executive Officer · 7 shared filings (4 issuers) · also on 4 other issuers

Aftab Kherani is on 8 issuers in total — a repeat sponsor. Their page lists every one.

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

Ryan Drant

Director · 5 shared filings (2 issuers) · also on 36 other issuers

Ryan Drant is on 38 issuers in total — a repeat sponsor. Their page lists every one.

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

Martha Temple

Director · 4 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Anthony Natale

Director · 4 shared filings (2 issuers) · also on 10 other issuers

Anthony Natale is on 12 issuers in total — a repeat sponsor. Their page lists every one.

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

Bradley Sloan

Director · 4 shared filings (1 issuer) · also on 3 other issuers

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Anurag Kondapalli

Director · 4 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Suzanne Goh

Executive Officer · 4 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Briana Elvaiah

Executive Officer · 4 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Michael Wert

Director · 4 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Neil Hattangadi

Executive Officer, Director · 4 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Stephen Anastos

Director · 4 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Camille Samuels

Director · 3 shared filings (1 issuer) · also on 10 other issuers

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

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

Ron Kuppersmith

Director · 3 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Tony Natale

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Sasha Schrode

Executive Officer, Director, Promoter · 3 shared filings (2 issuers)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Roy Tanaka

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

Roy Tanaka is on 5 issuers in total — a repeat sponsor. Their page lists every one.

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

Justin Klein

Director · 2 shared filings (1 issuer) · also on 6 other issuers

Justin Klein is on 7 issuers in total — a repeat sponsor. Their page lists every one.

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

Reed Gaither

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Duke Rholen

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Justin Brock

Director · 2 shared filings (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Aris Constantinides

Director · 1 shared filing (1 issuer) · also on 1 other issuer

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Robert Chang

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Richard B. Emmitt

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Michael Pederson

Director · 1 shared filing (1 issuer) · also on 1 other issuer

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

STACY ENXING SENG

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Jim Momtazee

Director · 1 shared filing (1 issuer) · also on 1 other issuer

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Philippe Marco

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Avi Naider

Director · 1 shared filing (1 issuer) · also on 5 other issuers

Avi Naider is on 6 issuers in total — a repeat sponsor. Their page lists every one.

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

Michael Dishowitz

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

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Lifei Cheng

Director · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Samantha E. Greene

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Rush Pope

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Shane Kreidel

Executive Officer · 1 shared filing (1 issuer) · also on 1 other issuer

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Mike Carter

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Satvat Ali

Director · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Adam Halpern-Leistner

Director · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Melissa Kong

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

Joe Koblish

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

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

William Marks

Director · 1 shared filing (1 issuer)

Listed on the same filings as Doug Koo. Their page shows their other deals.

The team behind the deals

Same business address

12 other issuers file from the same address

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 9 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 Doug Koo 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 9 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers Doug Koo is listed on: none on file. No website or social profile named in Cortex, Inc.'s SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #280 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 (Menlo Park, CA). 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) ↗California — find the county court ↗Los Angeles Superior Court case search ↗Pennsylvania UJS portal case search ↗

Securities regulators

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

Business registries

California Secretary of State business search ↗Pennsylvania Secretary of State business search ↗OpenCorporates ↗

Change history

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