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Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 9:18 AM ET

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Leon Chen

Named as an officer, director or promoter on SEC Form D filings · MA, CA · Jan 2, 2013 → Aug 25, 2025

10deals (issuers)
$1.13Breported sold
187investors
17Form D filings
2013–2025years on file

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:28 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

Leon Chen is listed as an executive officer and director on 17 SEC Form D filings by 10 issuers between Oct 2012 and Aug 2025. Largest by amount reported sold: Eikon Therapeutics, Inc. (Hayward, CA — biotechnology — 2021–2025; $517.8M reported sold to 43 investors), FOG PHARMACEUTICALS, INC. (Cambridge, MA — pharmaceuticals — 2018–2021; $178M reported sold to 24 investors), Nurix Therapeutics, Inc. (San Francisco, CA — industry reported as "Other" — 2020; $120.2M reported sold to 23 investors), GENOCEA BIOSCIENCES, INC. (Cambridge, MA — biotechnology — 2012; $75.5M reported sold to 21 investors), ESCAPE Bio, Inc. (South San Francisco, CA — biotechnology — 2015–2017; $73M reported sold to 32 investors) and 5 more (all listed below).

What this means That is a lot of deals — 10 separate companies raised money with this person listed as executive officer and director, over about 13 years. Across those companies the filings report $1.13B sold in total.

Listed alongside Dror Berman (4 shared filings), James B. Tananbaum (4 shared filings), Roger M. Perlmutter (4 shared filings), Asish Xavier (3 shared filings), Edward M. Fitzgerald (3 shared filings) and 74 others.

What this means These are the other officers, directors or promoters the companies named on the same forms — the team around Leon. 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 17 public filings for Leon Chen and found 18 differences, 3 worth asking the sponsor about: Investor count went down between filings; Leon Chen is no longer listed on the Oct 11, 2018 amendment; 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 Leon Chen has not run yet — it is joining a line of 30,229 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, 2:28 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 Leon Chen..

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, 2:28 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

18 differences found between the filings for Leon Chen — 3 worth asking about (compared 17 filings on Oct 24, 2026)

Note · Nov 15, 1985 – Nov 25, 2024

5 bankruptcy cases name the subject or team members

Bankruptcy case: Genocea Biosciences, Inc. — filed Jul 5, 2022 · Bankruptcy case: Genocea Biosciences, Inc. v. 100 Discovery Park DE, LLC — filed Jan 26, 2023 · Bankruptcy case: Robin J Washington — filed Mar 26, 2019 · Bankruptcy case: Moldt v. US Bank NA — filed Jun 12, 2013 · Bankruptcy case: Robin A. Washington — filed Nov 15, 1985

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
Worth asking · Jun 2, 2017 – Oct 11, 2018

Investor count went down between filings — ESCAPE Bio, Inc.

The Jun 2, 2017 filing reports 32 investors; the Oct 11, 2018 Form D/A reports 31 investors.

What this means Investor counts normally only grow. A smaller number can mean investors left or were refunded, or a count was corrected. Ask the sponsor what happened.

Sources
Note · Jun 19, 2017 – Aug 25, 2025

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

Form D filed 42 days after the first sale — Plexium, Inc. · Form D filed 34 days after the first sale — Eikon Therapeutics, Inc. · Form D filed 17 days after the first sale — Nurix Therapeutics, Inc. · Form D filed 16 days after the first sale — LogicBio Therapeutics, 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.

Sources
Note · Jun 19, 2017 – Feb 28, 2025

8 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 — Eikon Therapeutics, Inc. (latest filing Feb 28, 2025) · No amendment in the last 12 months on an offering that may still be open — Eikon Therapeutics, Inc. (latest filing Jun 1, 2023) · No amendment in the last 12 months on an offering that may still be open — Eikon Therapeutics, Inc. (latest filing Jan 6, 2022) · No amendment in the last 12 months on an offering that may still be open — Eikon Therapeutics, Inc. (latest filing May 13, 2021) · No amendment in the last 12 months on an offering that may still be open — FOG PHARMACEUTICALS, INC. (latest filing Jan 5, 2021) · and 3 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
Worth asking · Jun 2, 2017 – Oct 11, 2018

Leon Chen is no longer listed on the Oct 11, 2018 amendment — ESCAPE Bio, Inc.

Leon Chen appears on the Jun 2, 2017 Form D/A (executive officer, director) but not on the Oct 11, 2018 Form D/A for the same offering.

What this means People leave, and the issuer must list only current officers, directors and promoters. It is still worth asking why this person left and who replaced them.

Sources
Worth asking · Oct 11, 2012 – Jul 2, 2013

Leon Chen is no longer listed on the Jul 2, 2013 amendment — GENOCEA BIOSCIENCES, INC.

Leon Chen appears on the Oct 11, 2012 Form D (director) but not on the Jul 2, 2013 Form D/A for the same offering.

What this means People leave, and the issuer must list only current officers, directors and promoters. It is still worth asking why this person left and who replaced them.

Sources
Note · May 13, 2021 – Jan 6, 2022

Leon Chen's role changed at Eikon Therapeutics, Inc.: executive officer, director → director

The May 13, 2021 filing lists Leon Chen as executive officer, director; the Jan 6, 2022 Form D 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 · Jun 2, 2017 – Oct 11, 2018

Offering amount changed between filings — ESCAPE Bio, Inc.

The Jun 2, 2017 filing says $63,000,000 offered; the Oct 11, 2018 Form D/A says $63,002,700.

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.

Sources
Note · Feb 14, 2018 – May 16, 2018

Offering amount changed between filings — FOG PHARMACEUTICALS, INC.

The Feb 14, 2018 filing says $49,999,994 offered; the May 16, 2018 Form D/A says $66,014,944.

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.

Sources
Note · Aug 31, 2015 – Jun 2, 2017

Offering amount changed between filings — ESCAPE Bio, Inc.

The Aug 31, 2015 filing says $55,002,700 offered; the Jun 2, 2017 Form D/A says $63,000,000.

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.

Sources
Note · Aug 31, 2015 – Oct 11, 2018

Industry group changed between filings — ESCAPE Bio, Inc.

"Other Health Care" (Aug 31, 2015 to Jun 2, 2017); then "Biotechnology" (Oct 11, 2018).

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.

Sources
Note · Aug 31, 2015

Formed in 2020 per the latest filing, but activity is dated 2015 — ESCAPE Bio, Inc.

The issuer's latest filing says it was formed in 2020. The Aug 31, 2015 filing says the first sale was Aug 19, 2015 — before that year.

What this means A company cannot sell before it exists, so one of the two dates is likely a typo on the form. Ask the sponsor for the formation document.

Sources
Note · Aug 28, 2025 – Aug 28, 2026

Same name, different state: "LEON FUNG CHEN" (CA) is a separate record

This page covers filings where the address state is MA or CA. A separate record, "LEON FUNG CHEN" with address state CA, is listed on 2 filings — most recently by Composition I LP (Aug 28, 2026). The two records do not overlap in time: this page runs Jan 2, 2013 to Aug 25, 2025; the other runs Aug 28, 2025 to Aug 28, 2026.

What this means Could be the same person who moved, or two people with the same name. We keep them apart until a filing ties them together. Check both pages before you decide.

Sources
Note · Nov 3, 2009 – Dec 1, 2021

Same name, different state: "Leon Chen" (TX) is a separate record

This page covers filings where the address state is MA or CA. A separate record, "Leon Chen" with address state TX, is listed on 19 filings — most recently by Tiff's Treats Holdings, Inc. (Dec 1, 2021). Both records have filings in the same period (Jan 2, 2013 to Dec 1, 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 · May 16, 2019

Same name, different state: "LEON CHEN" (AZ) is a separate record

This page covers filings where the address state is MA or CA. A separate record, "LEON CHEN" with address state AZ, is listed on 1 filing — most recently by NATURAL PARTNERS, INC (May 16, 2019). Both records have filings in the same period (May 16, 2019).

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 27, 2013 – Dec 6, 2017

Same name, different state: "Leon Chen" (E9) is a separate record

This page covers filings where the address state is MA or CA. A separate record, "Leon Chen" with address state E9, is listed on 3 filings — most recently by 6 Dimensions Affiliates Fund, L.P. (Dec 6, 2017). Both records have filings in the same period (Feb 27, 2013 to Dec 6, 2017).

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 2, 2017 – Oct 11, 2018

Address moved from San Francisco, CA to South San Francisco, CA — ESCAPE Bio, Inc.

The people listed on the Jun 2, 2017 filing give San Francisco, CA; on the Oct 11, 2018 filing they give South San Francisco, 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.

Sources
Note · Oct 11, 2012 – Aug 25, 2025

Leon Chen is listed with 2 different address states: MA, CA

MA on 5 filings (Oct 11, 2012 to Jan 5, 2021); CA on 12 filings (Jan 2, 2013 to Aug 25, 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

1 of 15 offerings reports sales commissions totalling $761,010; 1 reports finder's fees totalling $1,179,400; 1 reports proceeds to related persons totalling $1,931,935. (includes amounts the issuer reported as estimates)

Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Aug 25, 2025 D
Plexium, Inc.
File 021-555722
$0$0$0None listed on this filingEDGAR ↗
Feb 28, 2025 D
Eikon Therapeutics, Inc.
File 021-539574
$0$0$0None listed on this filingEDGAR ↗
Feb 5, 2024 D
Seranova Bio, Inc.
File 021-504369
$0$0$0
No amounts other than ordinary course employment compensation is being paid to officers and directors.
None listed on this filingEDGAR ↗
Jun 1, 2023 D
Eikon Therapeutics, Inc.
File 021-483121
$0$0$0None listed on this filingEDGAR ↗
Jan 6, 2022 D
Eikon Therapeutics, Inc.
File 021-428246
$0$0$0None listed on this filingEDGAR ↗
May 13, 2021 D
Eikon Therapeutics, Inc.
File 021-399311
$0$0$0 (est.)None listed on this filingEDGAR ↗
Jan 5, 2021 D
FOG PHARMACEUTICALS, INC.
File 021-385216
$0$0$0None listed on this filingEDGAR ↗
Mar 26, 2020 D
Nurix Therapeutics, Inc.
File 021-363761
$0$0$0None listed on this filingEDGAR ↗
May 16, 2018 D/A
FOG PHARMACEUTICALS, INC.
File 021-305650
$0$0$0None listed on this filingEDGAR ↗
Dec 19, 2017 D
RFXCEL CORP
File 021-301117
$0$0$0None listed on this filingEDGAR ↗
Aug 10, 2017 D
RFXCEL CORP
File 021-292599
$761,010$0$1,931,935
Amount shown will be paid to executive officers to redeem shares of capital stock. In addition, a portion of the proceeds may be used for salary and bonus compensation to executive officers in the future, in amounts that cannot currently be estimated.
BA Securities, LLC BrokerCheck CRD 153489 ↗
via BA Securities, LLC (CRD 153489 ↗)
EDGAR ↗
Jul 5, 2017 D
LogicBio Therapeutics, Inc.
File 021-290024
$0$0$0None listed on this filingEDGAR ↗
Jun 2, 2017 D/A
ESCAPE Bio, Inc.
File 021-246718
$0$0$0None listed on this filingEDGAR ↗
Jan 2, 2013 D
Crescendo Bioscience, Inc.
File 021-189231
$0$1,179,400$0 (est.)William J. Kridel BrokerCheck CRD 704171 ↗
via FERGHANA SECURITIES, INC. (CRD 43430 ↗)

E. Hunterson Herie BrokerCheck CRD 2431896 ↗
via FERGHANA SECURITIES, INC. (CRD 43430 ↗)

A. Rawle Michelson BrokerCheck CRD 1507251 ↗
via FERGHANA SECURITIES, INC. (CRD 43430 ↗)
EDGAR ↗
Oct 11, 2012 D
GENOCEA BIOSCIENCES, INC.
File 021-185355
$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 10

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

Biotechnology

Plexium, Inc.

San Diego, CA · Aug 25, 2025
  • Aug 25, 2025 · D · $60,115,703 sold of $60,115,703 · 20 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $60.1M from 20 investors (100% of the $60.1M target) as of the latest filing. Leon 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. "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.

Biotechnology

Eikon Therapeutics, Inc.

Hayward, CA · May 13, 2021 → Feb 28, 2025 · 4 filings
  • Feb 28, 2025 · D · $350,700,037 sold of $399,999,934 · 27 investors · min. No minimum reported · role: Director EDGAR ↗
  • Jun 1, 2023 · D · $140,759,782 sold of $534,999,983 · 21 investors · min. $33,667 · role: Director EDGAR ↗
  • Jan 6, 2022 · D · $517,764,785 sold of $524,999,783 · 43 investors · min. No minimum reported · role: Director EDGAR ↗
  • May 13, 2021 · D · $102,537,782 sold of $107,811,248 · 12 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗

Raised $517.8M from 43 investors (100% of the $400M target) as of the latest filing. Leon is listed as director, executive officer on 4 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.

Biotechnology

Seranova Bio, Inc.

South San Francisco, CA · Feb 5, 2024
  • Feb 5, 2024 · D · $9,999,995 sold of $9,999,995 · 4 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $10M from 4 investors (100% of the $10M target) as of the latest filing. Leon 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. "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.

Pharmaceuticals

FOG PHARMACEUTICALS, INC.

Cambridge, MA · Feb 14, 2018 → Jan 5, 2021 · 3 filings
  • Jan 5, 2021 · D · $23,271,035 sold of $107,000,017 · 22 investors · min. No minimum reported · role: Director EDGAR ↗
  • May 16, 2018 · D/A · $65,514,944 sold of $66,014,944 · 24 investors · min. No minimum reported · role: Director EDGAR ↗
  • Feb 14, 2018 · D · $35,014,943 sold of $49,999,994 · 17 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $178M from 24 investors (100% of the $107M target) as of the latest filing. Leon 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: Pharmaceuticals / 506(b) (800 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

Nurix Therapeutics, Inc.

San Francisco, CA · Mar 26, 2020
  • Mar 26, 2020 · D · $120,249,972 sold of $120,249,972 · 23 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $120.2M from 23 investors (100% of the $120.2M target) as of the latest filing. Leon 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. "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.

Computers

RFXCEL CORP

San Ramon, CA · Aug 10, 2017 → Dec 19, 2017 · 2 filings
  • Dec 19, 2017 · D · $194,957 sold of $194,957 · 1 investors · min. $194,957 · role: Director EDGAR ↗
  • Aug 10, 2017 · D · $27,167,000 sold of $30,000,000 · 1 investors · min. $27,000,000 · role: Director EDGAR ↗

Raised $27.2M from 1 investor (100% of the $195K target) as of the latest filing. Leon 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.

Biotechnology

LogicBio Therapeutics, Inc.

Cambridge, MA · Jul 5, 2017
  • Jul 5, 2017 · D · $29,181,271 sold of $44,894,260 · 9 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $29.2M from 9 investors (65% of the $44.9M target) as of the latest filing. Leon 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. "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 Health Care

ESCAPE Bio, Inc.

South San Francisco, CA · Aug 31, 2015 → Jun 2, 2017 · 2 filings
  • Jun 2, 2017 · D/A · $46,002,700 sold of $63,000,000 · 32 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗
  • Aug 31, 2015 · D · $20,002,700 sold of $55,002,700 · 6 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗

Raised $73M from 32 investors (100% of the $63M target) as of the latest filing. Leon is listed as executive officer, 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: 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.

Biotechnology

Crescendo Bioscience, Inc.

South San Francisco, CA · Jan 2, 2013
  • Jan 2, 2013 · D · $28,454,396 sold of $28,454,396 · 9 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $37.6M from 10 investors (100% of the $28.5M target) as of the latest filing. Leon 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.

Biotechnology

GENOCEA BIOSCIENCES, INC.

Cambridge, MA · Oct 11, 2012
  • Oct 11, 2012 · D · $15,250,000 sold of $30,500,000 · 21 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $75.5M from 21 investors (100% of the $30.5M target) as of the latest filing. Leon 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.

  • Leon Chen — TX, 9 issuers, Nov 3, 2009 → Dec 1, 2021 · no shared issuer
  • Leon Chen — Cayman Islands (as filed: E9), 3 issuers, Feb 27, 2013 → Dec 6, 2017 · no shared issuer
  • LEON CHEN — AZ, 1 issuer, May 16, 2019 → May 16, 2019 · no shared issuer
  • LEON FUNG CHEN — CA, 1 issuer, Aug 28, 2025 → Aug 28, 2026 · no shared issuer

People around Leon 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.

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

James B. Tananbaum

Director · 4 shared filings (1 issuer) · also on 28 other issuers

James B. Tananbaum is on 29 issuers in total — a repeat sponsor. Their page lists every one.

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

Dror Berman

Director · 4 shared filings (1 issuer) · also on 10 other issuers

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

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

Roger M. Perlmutter

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Gregory L. Verdine

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Asish Xavier

Director · 3 shared filings (2 issuers) · also on 20 other issuers

Asish Xavier is on 22 issuers in total — a repeat sponsor. Their page lists every one.

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

Jeffrey A. Leerink

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

Jeffrey A. Leerink is on 7 issuers in total — a repeat sponsor. Their page lists every one.

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

WeiQing Zhou

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Edward M. Fitzgerald

Director · 3 shared filings (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Peter A. Thompson

Director · 2 shared filings (1 issuer) · also on 28 other issuers

Peter A. Thompson is on 29 issuers in total — a repeat sponsor. Their page lists every one.

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

Peter Moldt

Director · 2 shared filings (1 issuer) · also on 10 other issuers

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

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

Adam Goulburn

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

Adam Goulburn is on 13 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

Atul Mohidekar

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Glenn Abood

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Jack Tarkoff

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Alfred Bowie

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Benjamin Thorner

Executive Officer · 2 shared filings (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Kenneth Frazier

Director · 2 shared filings (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

R. Sanders Williams

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Robin Washington

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Michael Grey

Director · 1 shared filing (1 issuer) · also on 9 other issuers

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

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

Brook Byers

Director · 1 shared filing (1 issuer) · also on 21 other issuers

Brook Byers is on 22 issuers in total — a repeat sponsor. Their page lists every one.

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

Jack Oliver

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Larry Leisure

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

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

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

William Hagstrom

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Kevin Bitterman

Director · 1 shared filing (1 issuer) · also on 23 other issuers

Kevin Bitterman is on 24 issuers in total — a repeat sponsor. Their page lists every one.

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

George Siber

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Julia Gregory

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Krishna Yeshwant

Director · 1 shared filing (1 issuer) · also on 9 other issuers

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

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

Ralph Snyderman

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

SIMEON GEORGE

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Robert Paull

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

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

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

JESSICA BAKER FLECHTNER

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

PAUL GIANNASCA

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

ROBERT E. FARRELL JR.

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

WILLIAM CLARK

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

George Rehm

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

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

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

Rob Hopfner

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

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

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

Giovanni Ferrara

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

Listed on the same filings as Leon Chen. Their page shows their other deals.

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

Josh Green

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

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

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

SETH HETHERINGTON

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Leon Chen. Their page shows their other deals.

The team behind the deals

Same business address

33 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)

None of the 10 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 Leon Chen 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 10 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers Leon Chen is listed on: none on file. No website or social profile named in Nurix Therapeutics, Inc.'s SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #217,330 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 (San Francisco, CA). Each opens in a new tab; what you find there is not verified by PartnerFacts.

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