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Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 9:28 AM ET

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John Hamer

Named as an officer, director or promoter on SEC Form D filings · NC, CA · May 20, 2009 → Sep 28, 2023

11deals (issuers)
$1.15Breported sold
154investors
24Form D filings
2009–2023years on file

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:18 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

John Hamer is listed as an executive officer, director, and promoter on 24 SEC Form D filings by 11 issuers between May 2009 and Oct 2025. Largest by amount reported sold: Pivot Bio, Inc. (Berkeley, CA — other technology — 2016; $434.5M reported sold to 19 investors), DCVC Bio II, L.P. (Palo Alto, CA — pooled investment fund — 2020; $350M reported sold to 33 investors), DCVC Bio, L.P. (Palo Alto, CA — pooled investment fund — 2018–2019; $208M reported sold to 41 investors), Unlearn.ai, Inc. (San Francisco, CA — industry reported as "Other" — 2020–2022; $50M reported sold to 14 investors), Empirico Inc. (San Diego, CA — biotechnology — 2018–2023; $45.2M reported sold to 5 investors) and 6 more (all listed below).

What this means That is a lot of deals — 11 separate companies raised money with this person listed as executive officer, director, and promoter, over about 16 years. Across those companies the filings report $1.15B sold in total.

Listed alongside Dennis Langer (7 shared filings), Christopher Meldrum (6 shared filings), Kiersten Stead (6 shared filings), Matthew Ocko (6 shared filings), Pieter Burger (6 shared filings) and 45 others.

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

4 of the issuers belong to the sponsor group Dcvc (16 issuers, $3.38B reported sold, 2012–2026).

What this means A sponsor group is one team that sets up a new company for each deal. Dcvc has 16 companies on file and $3.38B reported sold in total — the group page shows the whole track record in one place.

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) — 8 bankruptcy cases matching the name listed in Key records below.

What this means 8 records came back. Each one is listed below with a link to the original document and a line saying why it matched. A name match is not proof it is the same person or company — read the why line and the document. Being sued or named in a release is an accusation, not a finding.

We compared 24 public filings for John Hamer and found 11 differences, 1 worth asking the sponsor about: 6 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 John Hamer has not run yet — it is joining a line of 33,915 names; searches run around the clock at the hosts' allowed rate. Searched so far: 638 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, 2:18 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 John Hamer..

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

8 cases: 8 closed (disposition not in docket feed)

John H. Hamer, Jr. closed
United States Bankruptcy Court, W.D. Tennessee · No. 22-21644 · Filed Apr 27, 2022 · Closed May 18, 2023
Role of John H. Hamer, Jr.: Debtor · Outcome: Case closed 2023-05-18 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in TN (not a filing state)
John H. Hamer, Jr. closed
United States Bankruptcy Court, W.D. Tennessee · No. 20-23277 · Filed Jun 23, 2020 · Closed Jul 14, 2022
Role of John H. Hamer, Jr.: Debtor · Outcome: Case closed 2022-07-14 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in TN (not a filing state)
John H. Hamer, Jr. closed
United States Bankruptcy Court, W.D. Tennessee · No. 16-23597 · Filed Apr 14, 2016 · Closed Sep 22, 2020
Role of John H. Hamer, Jr.: Debtor · Outcome: Case closed 2020-09-22 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in TN (not a filing state)
John B Hamer, III and Nelly Hamer closed
United States Bankruptcy Court, D. Maryland · No. 12-25711 · Filed Aug 27, 2012 · Closed Dec 27, 2012
Role of John B Hamer, III: Debtor · Outcome: Case closed 2012-12-27 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in MD (not a filing state)
John C Hamer, Jr and Melissa J Hamer closed
United States Bankruptcy Court, N.D. Oklahoma · No. 07-11556 · Filed Aug 13, 2007 · Closed Jan 3, 2008
Role of John C Hamer, Jr: Debtor · Outcome: Case closed 2008-01-03 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in OK (not a filing state)
John E. Hamer closed
United States Bankruptcy Court, M.D. Pennsylvania · No. 1:99-bk-00605 · Filed Feb 11, 1999 · Closed Jun 23, 1999
Role of John E. Hamer: Debtor · Outcome: Case closed 1999-06-23 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in PA (not a filing state)
John Hamer closed
United States Bankruptcy Court, D. Massachusetts · No. 94-45248 · Filed Nov 30, 1994 · Closed May 4, 1995
Role of John Hamer: Debtor · Outcome: Case closed 1995-05-04 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in MA (not a filing state)
John M. Hamer, Jr. closed
United States Bankruptcy Court, D. Maryland · No. 94-55476 · Filed Aug 25, 1994 · Closed Feb 2, 1995
Role of John M. Hamer, Jr.: Debtor · Outcome: Case closed 1995-02-02 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 18 federal dockets); 5 people with this name in Form D filings; court in MD (not a filing state)
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, 2:18 AM ET.

Court records show docket facts only; we never restate allegations as facts. Outcome wording comes from the docket feed; where it does not state a disposition we say so.

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

11 differences found between the filings for John Hamer — 1 worth asking about (compared 24 filings on Oct 24, 2026)

Note · May 6, 1998 – Dec 16, 1998

Bankruptcy case: Hagerstown Fiber Limited Partnership v. Landegger — filed May 6, 1998

United States Bankruptcy Court, S.D. New York docket "Hagerstown Fiber Limited Partnership v. Landegger" filed May 6, 1998, closed Dec 16, 1998. George Landegger (listed on the same filings) is listed as Defendant ("Landegger"). Our match estimate: 70%.

What this means A bankruptcy filing was found. Many are old or personal and have nothing to do with the deal — but ask what it was and when it closed.

Sources
Note · Nov 18, 2021 – Sep 28, 2023

John Hamer appears on 2 deals that stopped filing before reaching their target

DCVC Bio III, L.P. (last filing Sep 28, 2023; $0 sold of $400,000,000); DCVC Bio Opportunity Fund, L.P. (last filing Nov 18, 2021; $0 sold of $350,000,000). 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.

Sources
Worth asking · Apr 15, 2011 – Feb 23, 2024

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

Form D filed 112 days after the first sale — Avicenna Biosciences, Inc. · Form D filed 259 days after the first sale — Avicenna Biosciences, Inc. · Form D filed 252 days after the first sale — Avicenna Biosciences, Inc. · Form D filed 17 days after the first sale — Unlearn.ai, Inc. · Form D filed 35 days after the first sale — CHROMATIN, INC. · and 1 more

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

Sources
Note · May 18, 2009 – Feb 23, 2024

7 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 — Avicenna Biosciences, Inc. (latest filing Feb 23, 2024) · No amendment in the last 12 months on an offering that may still be open — Empirico Inc. (latest filing Mar 23, 2023) · No amendment in the last 12 months on an offering that may still be open — Avicenna Biosciences, Inc. (latest filing Dec 30, 2022) · No amendment in the last 12 months on an offering that may still be open — DCVC Bio, L.P. (latest filing May 14, 2019) · No amendment in the last 12 months on an offering that may still be open — CHROMATIN, INC. (latest filing Mar 12, 2012) · and 2 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.

Sources
Note · Nov 9, 2011 – Mar 12, 2012

John Hamer's role changed at CHROMATIN, INC.: director, promoter → director

The Nov 9, 2011 filing lists John Hamer as director, promoter; the Mar 12, 2012 Form D/A lists director.

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.

Sources
Note · Jan 22, 2016 – Oct 30, 2025

5 offerings changed their target amount between filings

Offering amount changed between filings — Avicenna Biosciences, Inc. · Offering amount changed between filings — Avicenna Biosciences, Inc. · Offering amount changed between filings — Unlearn.ai, Inc. · Offering amount changed between filings — DCVC Bio II, L.P. · Offering amount changed between filings — Pivot Bio, Inc.

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

Sources
Note · Oct 11, 2011 – Jan 15, 2025

Same name, different state: "John W. Hamer" (NY) is a separate record

This page covers filings where the address state is NC or CA. A separate record, "John W. Hamer" with address state NY, is listed on 12 filings — most recently by OLEDWorks LLC (Jan 15, 2025). Both records have filings in the same period (Oct 11, 2011 to Sep 28, 2023).

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.

Sources
Note · Jun 24, 2021

Same name, different state: "John Hamer" (WA) is a separate record

This page covers filings where the address state is NC or CA. A separate record, "John Hamer" with address state WA, is listed on 1 filing — most recently by Umoja Biopharma, Inc. (Jun 24, 2021). Both records have filings in the same period (Jun 24, 2021).

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.

Sources
Note · Aug 10, 2018 – May 27, 2020

Same name, different state: "John Hamer" (A1) is a separate record

This page covers filings where the address state is NC or CA. A separate record, "John Hamer" with address state A1, is listed on 2 filings — most recently by AbCellera Biologics Inc. (May 27, 2020). Both records have filings in the same period (Aug 10, 2018 to May 27, 2020).

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.

Sources
Note · Feb 13, 2012

Same name, different state: "John Hamer" (OR) is a separate record

This page covers filings where the address state is NC or CA. A separate record, "John Hamer" with address state OR, is listed on 1 filing — most recently by WELLPARTNER INC (Feb 13, 2012). Both records have filings in the same period (Feb 13, 2012).

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.

Sources
Note · May 20, 2009 – Oct 30, 2025

John Hamer is listed with 2 different address states: CA, NC

CA on 18 filings (May 20, 2009 to Sep 28, 2023); NC on 6 filings (Oct 27, 2022 to Oct 30, 2025).

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.

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 17 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
Oct 30, 2025 D/A
Avicenna Biosciences, Inc.
File 021-463082
$0$0$0
Other than the payment of salaries and other compensation and benefits and reimbursement of expenses, no officer, director, partner, manager or promoter will receive any payments from the proceeds of this offering.
None listed on this filingEDGAR ↗
Jul 16, 2024 D
Avicenna Biosciences, Inc.
File 021-518896
$0$0$0
Other than the payment of salaries and other compensation and benefits and reimbursement of expenses, no officer, director, partner, manager or promoter will receive any payments from the proceeds of this offering.
None listed on this filingEDGAR ↗
Feb 23, 2024 D
Avicenna Biosciences, Inc.
File 021-505963
$0$0$0
Other than the payment of salaries and other compensation and benefits and reimbursement of expenses, no officer, director, partner, manager or promoter will receive any payments from the proceeds of this offering.
None listed on this filingEDGAR ↗
Sep 28, 2023 D
DCVC Bio III, L.P.
File 021-493337
$0$0$0None listed on this filingEDGAR ↗
Mar 23, 2023 D
Empirico Inc.
File 021-476761
$0$0$0None listed on this filingEDGAR ↗
Dec 30, 2022 D
Avicenna Biosciences, Inc.
File 021-469305
$0$0$0
Other than the payment of salaries and other compensation and benefits and reimbursement of expenses, no officer, director, partner, manager or promoter will receive any payments from the proceeds of this offering.
None listed on this filingEDGAR ↗
Apr 19, 2022 D
Unlearn.ai, Inc.
File 021-442493
$0$0$0None listed on this filingEDGAR ↗
Nov 18, 2021 D
DCVC Bio Opportunity Fund, L.P.
File 021-421747
$0$0$0None listed on this filingEDGAR ↗
Dec 15, 2020 D/A
Unlearn.ai, Inc.
File 021-365395
$0$0$0None listed on this filingEDGAR ↗
Aug 4, 2020 D/A
DCVC Bio II, L.P.
File 021-367880
$0$0$0None listed on this filingEDGAR ↗
Dec 31, 2019 D
Empirico Inc.
File 021-356824
$0$0$0None listed on this filingEDGAR ↗
May 14, 2019 D/A
DCVC Bio, L.P.
File 021-310630
$0$0$0None listed on this filingEDGAR ↗
Nov 13, 2018 D
Empirico Inc.
File 021-325669
$0$0$0None listed on this filingEDGAR ↗
Mar 22, 2016 D/A
Pivot Bio, Inc.
File 021-255760
$0$0$0 (est.)None listed on this filingEDGAR ↗
Mar 12, 2012 D/A
CHROMATIN, INC.
File 021-168466
$0$0$0None listed on this filingEDGAR ↗
May 2, 2011 D
COBALT TECHNOLOGIES INC
File 021-159150
$0$0$0None listed on this filingEDGAR ↗
May 20, 2009 D
OSPREY PHARMACEUTICALS USA INC
File 021-118943
$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 11

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

Biotechnology

Avicenna Biosciences, Inc.

Durham, NC · Oct 27, 2022 → Oct 30, 2025 · 6 filings
  • Oct 30, 2025 · D/A · $70,650 sold of $70,650 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Jul 16, 2024 · D · $6,000,000 sold of $6,000,000 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Feb 23, 2024 · D · $6,000,000 sold of $10,000,000 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Mar 22, 2023 · D/A · $27,450 sold of $41,318 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Dec 30, 2022 · D · $3,000,000 sold of $6,000,000 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 27, 2022 · D · $18,000 sold of $18,000 · 1 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $6M from 1 investor (100% of the $71K target) as of the latest filing. John is listed as director on 6 filings for this deal.

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.

Pooled Investment Fund · group: Dcvc

DCVC Bio III, L.P.

Palo Alto, CA · Sep 28, 2023
  • Sep 28, 2023 · D · $0 sold of $400,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Managing Member of the Managing Member of the General Partner) EDGAR ↗

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

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.

Biotechnology

Empirico Inc.

San Diego, CA · Nov 13, 2018 → Mar 23, 2023 · 3 filings
  • Mar 23, 2023 · D · $45,222,197 sold of $55,222,199 · 4 investors · min. No minimum reported · role: Director EDGAR ↗
  • Dec 31, 2019 · D · $16,999,999 sold of $16,999,999 · 3 investors · min. No minimum reported · role: Director EDGAR ↗
  • Nov 13, 2018 · D · $12,549,999 sold of $12,549,999 · 5 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $45.2M from 5 investors (82% of the $55.2M target) as of the latest filing. John is listed as director on 3 filings for this deal.

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.

Other

Unlearn.ai, Inc.

San Francisco, CA · Apr 20, 2020 → Apr 19, 2022 · 3 filings
  • Apr 19, 2022 · D · $49,999,991 sold of $49,999,991 · 14 investors · min. No minimum reported · role: Director EDGAR ↗
  • Dec 15, 2020 · D/A · $15,000,000 sold of $15,000,000 · 11 investors · min. No minimum reported · role: Director EDGAR ↗
  • Apr 20, 2020 · D · $12,000,000 sold of $12,000,000 · 6 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $50M from 14 investors (100% of the $50M target) as of the latest filing. John is listed as director on 3 filings for this deal.

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.

Pooled Investment Fund · group: Dcvc

DCVC Bio Opportunity Fund, L.P.

Palo Alto, CA · Nov 18, 2021
  • Nov 18, 2021 · D · $0 sold of $350,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Managing Member of the Managing Member of the General Partner) EDGAR ↗

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

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.

Pooled Investment Fund · group: Dcvc

DCVC Bio II, L.P.

Palo Alto, CA · May 28, 2020 → Aug 4, 2020 · 2 filings
  • Aug 4, 2020 · D/A · $350,000,000 sold of $350,000,000 · 33 investors · min. No minimum reported · role: Executive Officer (Managing Member of the Managing Member of the General Partner) EDGAR ↗
  • May 28, 2020 · D · $0 sold of $275,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Managing Member of the Managing Member of the General Partner) EDGAR ↗

Raised $350M from 33 investors (100% of the $350M target) as of the latest filing. John is listed as executive officer on 2 filings for this deal.

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.

Pooled Investment Fund · group: Dcvc

DCVC Bio, L.P.

Palo Alto, CA · Apr 19, 2018 → May 14, 2019 · 2 filings
  • May 14, 2019 · D/A · $208,030,000 sold of $250,000,000 · 41 investors · min. No minimum reported · role: Executive Officer (Managing Member of the Managing Member of the General Partner) EDGAR ↗
  • Apr 19, 2018 · D · $0 sold of $250,000,000 · 0 investors · min. No minimum reported · role: Executive Officer (Managing Member of the Managing Member of the General Partner) EDGAR ↗

Raised $208M from 41 investors (83% of the $250M target) as of the latest filing. John is listed as executive officer on 2 filings for this deal.

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.

Biotechnology

Pivot Bio, Inc.

Berkeley, CA · Jan 22, 2016 → Mar 22, 2016 · 2 filings
  • Mar 22, 2016 · D/A · $15,996,489 sold of $15,996,489 · 10 investors · min. No minimum reported · role: Director EDGAR ↗
  • Jan 22, 2016 · D · $8,121,509 sold of $15,021,508 · 4 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $434.5M from 19 investors (100% of the $16M target) as of the latest filing. John is listed as director on 2 filings for this deal.

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.

Other

CHROMATIN, INC.

Chicago, IL · Nov 9, 2011 → Mar 12, 2012 · 2 filings
  • Mar 12, 2012 · D/A · $11,990,135 sold of $12,430,800 · 16 investors · min. $10,000 · role: Director EDGAR ↗
  • Nov 9, 2011 · D · $10,388,889 sold of $12,430,800 · 5 investors · min. $10,000 · role: Director, Promoter EDGAR ↗

Raised $23.6M from 18 investors (100% of the $12.4M target) as of the latest filing. John is listed as director, promoter on 2 filings for this deal.

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 Energy

COBALT TECHNOLOGIES INC

Mountain View, CA · May 2, 2011
  • May 2, 2011 · D · $22,004,632 sold of $34,125,000 · 17 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $23.2M from 18 investors (68% of the $34.1M target) as of the latest filing. John is listed as director.

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.

Pharmaceuticals

OSPREY PHARMACEUTICALS USA INC

San Francisco, CA · May 20, 2009
  • May 20, 2009 · D · $5,892,744 sold of $9,049,024 · 5 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $5.89M from 5 investors (65% of the $9.05M target) as of the latest filing. John is listed as director.

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 (4)

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

  • John W. Hamer — NY, 1 issuer, Oct 11, 2011 → Jan 15, 2025 · no shared issuer
  • John Hamer — OR, 1 issuer, Feb 13, 2012 → Feb 13, 2012 · no shared issuer
  • John Hamer — British Columbia, Canada (as filed: A1), 1 issuer, Aug 10, 2018 → May 27, 2020 · no shared issuer
  • John Hamer — WA, 1 issuer, Jun 24, 2021 → Jun 24, 2021 · no shared issuer

People around John 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.

Management entity

Unilever Swiss Holdings AG

Promoter · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

Management entity

Meghan Sharp

Director · 1 shared filing (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Dennis Langer

Director · 7 shared filings (2 issuers)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Pieter Burger

Executive Officer, Director · 6 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Thomas Kaiser

Executive Officer, Director · 6 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Christopher Meldrum

Executive Officer, Director · 6 shared filings (1 issuer) · also on 1 other issuer

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Matthew Ocko

Executive Officer · 6 shared filings (4 issuers) · also on 14 other issuers

Matthew Ocko is on 18 issuers in total — a repeat sponsor. Their page lists every one.

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

Zachary Bogue

Executive Officer · 6 shared filings (4 issuers) · also on 15 other issuers

Zachary Bogue is on 19 issuers in total — a repeat sponsor. Their page lists every one.

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

Kiersten Stead

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

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

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

Francisco Gimenez

Director · 3 shared filings (1 issuer) · also on 6 other issuers

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

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

Aaron Smith

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Omri Gottesman

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Brian Cajes

Executive Officer · 3 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Shannon Bruse

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Kolluri Swaroop

Director · 3 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Charles Fisher

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Jonathan Ryan Walsh

Executive Officer · 3 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

George Arida

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

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

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

Matt Ocko

Director · 2 shared filings (1 issuer) · also on 12 other issuers

Matt Ocko is on 13 issuers in total — a repeat sponsor. Their page lists every one.

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

Kenneth Davenport

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Henry Hirvela

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Armand Lavoie

Director, Promoter · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Jeff Widder

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Daphne Preuss

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

David Jessen

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Steven E. Ducommun

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

John Greaves

Director · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Karsten Temme

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Alvin Tamsir

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Sanford Grossman

Director, Promoter · 2 shared filings (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Nassim Usman

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

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Roger Wyse

Director · 1 shared filing (1 issuer) · also on 7 other issuers

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

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

Martial LaCroix

Director · 1 shared filing (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

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

Jack Anthony

Executive Officer, Director · 1 shared filing (1 issuer)

Listed on the same filings as John Hamer. Their page shows their other deals.

The team behind the deals

Sponsor group

Dcvc

16 issuers · 29 filings · $3.38B reported sold · 2012–2026

One team, 16 deal companies. John Hamer is listed on 4 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 John Hamer.

Same business address

47 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); 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)

A person is never an adviser firm. 2 of the 11 issuers this person is listed on match a Form ADV adviser (searched 24,962 advisers as of Oct 2, 2026): DCVC Bio, L.P., CHROMATIN, INC..

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 John Hamer 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 11 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers John Hamer is listed on: none on file. No website or social profile named in COBALT TECHNOLOGIES INC's SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #308,505 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 (Mountain View, CA). Each opens in a new tab; what you find there is not verified by PartnerFacts.

Change history

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