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

Sponsor Check › Person

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

Cary Pfeffer

Named as an officer, director or promoter on SEC Form D filings · MA · Feb 24, 2010 → Jun 10, 2022

9deals (issuers)
$2.62Breported sold
239investors
14Form D filings
2010–2022years on file
Follow this personLook further ↓PDF

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:20 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

Cary Pfeffer is listed as an executive officer and director on 14 SEC Form D filings by 9 issuers between Feb 2010 and Jun 2022. Largest by amount reported sold: Third Rock Ventures VI, L.P. (Boston, MA — pooled investment fund — 2022; $1.11B reported sold to 65 investors), Third Rock Ventures V, L.P. (Boston, MA — pooled investment fund — 2019; $750M reported sold to 67 investors), Third Rock Ventures IV, L.P. (Boston, MA — pooled investment fund — 2016; $600M reported sold to 57 investors), Jounce Therapeutics, Inc. (Cambridge, MA — biotechnology — 2015–2020; $56M reported sold to 14 investors), Faze Medicines, Inc. (Cambridge, MA — biotechnology — 2020; $30.4M reported sold to 9 investors) and 4 more (all listed below).

What this means A repeat sponsor — 9 separate companies raised money with this person listed as executive officer and director, over about 12 years. Across those companies the filings report $2.62B sold in total.

Listed alongside Abbie Celniker (6 shared filings), Robert Tepper (6 shared filings), Dan Matloff (3 shared filings), Jeffrey Bluestone (3 shared filings), Kim C. Drapkin (3 shared filings) and 58 others.

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

3 of the issuers belong to the sponsor group Third Rock (7 issuers, $2.62B reported sold, 2010–2026).

What this means A sponsor group is one team that sets up a new company for each deal. Third Rock has 7 companies on file and $2.62B 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) — 1 bankruptcy case matching the name listed in Key records below.

What this means 1 record 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 14 public filings for Cary Pfeffer and found 11 differences, 3 worth asking the sponsor about: Amount sold went down between filings; Investor count went down between filings; 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 Cary Pfeffer has not run yet — it is joining a line of 52,935 names; searches run around the clock at the hosts' allowed rate. Searched so far: 641 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, 2:20 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 Cary Pfeffer..

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

1 case: 1 closed (disposition not in docket feed)

Cary J Pfeffer closed
United States Bankruptcy Court, E.D. New York · No. 8-99-89977 · Filed Dec 8, 1999 · Closed Mar 29, 2000
Role of Cary J Pfeffer: Debtor · Outcome: Case closed 2000-03-29 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (rare in federal dockets); 2 people with this name in Form D filings; court in NY (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, 2:20 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 Cary Pfeffer — 3 worth asking about (compared 14 filings on Oct 24, 2026)

Worth asking · Apr 13, 2011 – Apr 2, 2013

Amount sold went down between filings — TARIS BIOMEDICAL INC

The Apr 13, 2011 filing says $18,372,751 sold; the Apr 2, 2013 Form D/A says $13,500,000 sold — $4,872,751 less.

What this means Amounts sold normally only go up as a raise continues. A drop can mean investors were refunded, a figure was corrected, or an earlier number was wrong. Ask the sponsor which it was.

Form D (earlier) · Apr 13, 2011 ↗Form D/A (later) · Apr 2, 2013 ↗TARIS BIOMEDICAL INC — PartnerFacts page ↗
Sources
Worth asking · Apr 2, 2013 – Apr 4, 2013

Investor count went down between filings — TARIS BIOMEDICAL INC

The Apr 2, 2013 filing reports 11 investors; the Apr 4, 2013 Form D/A reports 8 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.

Form D/A (earlier) · Apr 2, 2013 ↗Form D/A (later) · Apr 4, 2013 ↗TARIS BIOMEDICAL INC — PartnerFacts page ↗
Sources
Note · Dec 22, 2020

Cary Pfeffer appears on 1 deal that stopped filing before reaching its target

Faze Medicines, Inc. (last filing Dec 22, 2020; $30,375,000 sold of $81,000,000). 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.

Faze Medicines, Inc. — PartnerFacts page ↗
Sources
Note · Mar 20, 2018 – Apr 5, 2018

Form D filed 16 days after the first sale — RHEOS MEDICINES, INC.

The filing says the first sale was Mar 20, 2018. The Form D was filed Apr 5, 2018 — 16 days later. The rule: a Form D is generally due within 15 days after the first sale, so this one is 1 days past that.

What this means A late notice is common and carries no penalty by itself. It is worth asking the sponsor why the paperwork lagged.

Form D · Apr 5, 2018 ↗RHEOS MEDICINES, INC. — PartnerFacts page ↗
Sources
Note · Feb 9, 2010 – Dec 22, 2020

4 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 — Faze Medicines, Inc. (latest filing Dec 22, 2020) · No amendment in the last 12 months on an offering that may still be open — RHEOS MEDICINES, INC. (latest filing Nov 8, 2018) · No amendment in the last 12 months on an offering that may still be open — Edimer Pharmaceuticals, Inc. (latest filing Aug 7, 2013) · No amendment in the last 12 months on an offering that may still be open — Eleven Biotherapeutics, Inc. (latest filing Oct 13, 2010)

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

Form D · Dec 22, 2020 ↗Faze Medicines, Inc. — PartnerFacts page ↗Form D/A · Nov 8, 2018 ↗RHEOS MEDICINES, INC. — PartnerFacts page ↗
Sources
Worth asking · Apr 2, 2013 – Apr 4, 2013

Cary Pfeffer is no longer listed on the Apr 4, 2013 amendment — TARIS BIOMEDICAL INC

Cary Pfeffer appears on the Apr 2, 2013 Form D/A (director) but not on the Apr 4, 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.

Form D/A · Apr 2, 2013 ↗Form D/A · Apr 4, 2013 ↗Cary Pfeffer — PartnerFacts page ↗TARIS BIOMEDICAL INC — PartnerFacts page ↗
Sources
Note · Oct 13, 2010 – Dec 5, 2014

Cary Pfeffer's role changed at Eleven Biotherapeutics, Inc.: executive officer, director → director

The Oct 13, 2010 filing lists Cary Pfeffer as executive officer, director; the Dec 5, 2014 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.

Form D/A · Oct 13, 2010 ↗Form D · Dec 5, 2014 ↗Cary Pfeffer — PartnerFacts page ↗Eleven Biotherapeutics, Inc. — PartnerFacts page ↗
Sources
Note · Apr 2, 2013 – Apr 4, 2013

Offering amount changed between filings — TARIS BIOMEDICAL INC

The Apr 2, 2013 filing says an indefinite amount offered; the Apr 4, 2013 Form D/A says $18,717,021.

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

Form D/A (earlier) · Apr 2, 2013 ↗Form D/A (later) · Apr 4, 2013 ↗TARIS BIOMEDICAL INC — PartnerFacts page ↗
Sources
Note · Apr 13, 2011 – Apr 2, 2013

Offering amount changed between filings — TARIS BIOMEDICAL INC

The Apr 13, 2011 filing says $18,717,021 offered; the Apr 2, 2013 Form D/A says an indefinite amount.

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

Form D (earlier) · Apr 13, 2011 ↗Form D/A (later) · Apr 2, 2013 ↗TARIS BIOMEDICAL INC — PartnerFacts page ↗
Sources
Note · Feb 24, 2010 – Dec 5, 2014

Cary Pfeffer is written 2 different ways on the filings

listed as "Cary Pfeffer" on 12 filings (from Feb 24, 2010), and "Cary G. Pfeffer" on 2 filings (from Dec 5, 2014).

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

Form D · Feb 24, 2010 ↗Form D · Dec 5, 2014 ↗Cary Pfeffer — PartnerFacts page ↗
Sources
Note · Oct 25, 2023

Same name, different state: "Cary G. Pfeffer" (MD) is a separate record

This page covers filings where the address state is MA. A separate record, "Cary G. Pfeffer" with address state MD, is listed on 1 filing — most recently by ManaT Bio, Inc. (Oct 25, 2023). The two records do not overlap in time: this page runs Feb 24, 2010 to Jun 10, 2022; the other has one filing dated Oct 25, 2023.

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.

Cary G. Pfeffer (MD) — PartnerFacts page ↗Form D · Oct 25, 2023 ↗ManaT Bio, Inc. — PartnerFacts page ↗Cary Pfeffer (MA) — this page ↗
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 11 offerings reports sales commissions totalling $1,400,000; 0 report finder's fees; 0 report proceeds to related persons. (includes amounts the issuer reported as estimates)

Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Jun 10, 2022 D
Third Rock Ventures VI, L.P.
File 021-448880
$0$0$0 (est.)
An affiliate of the General Partner will receive a fee for management services. The fee will be a percentage of the aggregate subscriptions of the Issuer's limited partners.
None listed on this filingEDGAR ↗
Dec 22, 2020 D
Faze Medicines, Inc.
File 021-384105
$0$0$0None listed on this filingEDGAR ↗
Oct 29, 2020 D
Jounce Therapeutics, Inc.
File 021-379231
$0$0$0None listed on this filingEDGAR ↗
Jun 7, 2019 D
Third Rock Ventures V, L.P.
File 021-341395
$0$0$0 (est.)
An affiliate of the General Partner will receive a fee for management services. The fee will be a percentage of the aggregate subscriptions of the Issuer's limited partners.
None listed on this filingEDGAR ↗
Nov 8, 2018 D/A
RHEOS MEDICINES, INC.
File 021-309382
$0$0$0None listed on this filingEDGAR ↗
Nov 2, 2016 D
Third Rock Ventures IV, L.P.
File 021-273650
$0$0$0 (est.)
An affiliate of the General Partner will receive a fee for management services. The fee will be a percentage of the aggregate subscriptions of the Issuer's limited partners.
None listed on this filingEDGAR ↗
Apr 29, 2015 D
Jounce Therapeutics, Inc.
File 021-238833
$0$0$0None listed on this filingEDGAR ↗
Dec 5, 2014 D
Eleven Biotherapeutics, Inc.
File 021-229571
$1,400,000$0$0Citigroup Global Markets Inc. BrokerCheck CRD 7059 ↗
Cowen and Company, LLC BrokerCheck CRD 7616 ↗
Leerink Partners LLC BrokerCheck CRD 39011 ↗		EDGAR ↗
Aug 7, 2013 D
Edimer Pharmaceuticals, Inc.
File 021-200941
$0$0$0None listed on this filingEDGAR ↗
Apr 2, 2013 D/A
TARIS BIOMEDICAL INC
File 021-158321
$0$0$0None listed on this filingEDGAR ↗
Oct 13, 2010 D/A
Eleven Biotherapeutics, Inc.
File 021-138996
$0$0$0
None other than salaries and bonuses in the ordinary course of business.
None 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 9

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

TR
Pooled Investment Fund · group: Third Rock

Third Rock Ventures VI, L.P.

Boston, MA · Jun 10, 2022
  • Jun 10, 2022 · D · $1,105,340,000 sold of $1,105,340,000 · 65 investors · min. $500,000 · role: Executive Officer (Manager of the GPLLC.) EDGAR ↗

Raised $1.11B from 65 investors (100% of the $1.11B target) as of the latest filing. Cary is listed as executive officer.

Latest filing on EDGAR ↗
Sources

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

FM
Biotechnology

Faze Medicines, Inc.

Cambridge, MA · Dec 22, 2020
  • Dec 22, 2020 · D · $30,375,000 sold of $81,000,000 · 9 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗

Raised $30.4M from 9 investors (38% of the $81M target) as of the latest filing. Cary is listed as executive officer, director.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: 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.

JT
Biotechnology

Jounce Therapeutics, Inc.

Cambridge, MA · Apr 29, 2015 → Oct 29, 2020 · 2 filings
  • Oct 29, 2020 · D · $34,999,995 sold of $34,999,995 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Apr 29, 2015 · D · $56,000,000 sold of $56,000,000 · 14 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $56M from 14 investors (100% of the $35M target) as of the latest filing. Cary is listed as director on 2 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: 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.

TR
Pooled Investment Fund · group: Third Rock

Third Rock Ventures V, L.P.

Boston, MA · Jun 7, 2019
  • Jun 7, 2019 · D · $750,000,000 sold of $750,000,000 · 67 investors · min. $200,000 · role: Executive Officer (Manager of the GPLLC.) EDGAR ↗

Raised $750M from 67 investors (100% of the $750M target) as of the latest filing. Cary is listed as executive officer.

Latest filing on EDGAR ↗
Sources

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

RM
Biotechnology

RHEOS MEDICINES, INC.

Cambridge, MA · Apr 5, 2018 → Nov 8, 2018 · 3 filings
  • Nov 8, 2018 · D/A · $27,500,000 sold of Indefinite · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 5, 2018 · D/A · $21,000,000 sold of Indefinite · 1 investors · min. No minimum reported · role: Director EDGAR ↗
  • Apr 5, 2018 · D · $15,500,000 sold of Indefinite · 1 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $27.5M from 1 investor as of the latest filing. Cary is listed as director on 3 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: 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.

TR
Pooled Investment Fund · group: Third Rock

Third Rock Ventures IV, L.P.

Boston, MA · Nov 2, 2016
  • Nov 2, 2016 · D · $600,000,000 sold of $600,000,000 · 57 investors · min. $1,000,000 · role: Executive Officer (Manager of the GPLLC.) EDGAR ↗

Raised $600M from 57 investors (100% of the $600M target) as of the latest filing. Cary is listed as executive officer.

Latest filing on EDGAR ↗
Sources

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

EB
Biotechnology

Eleven Biotherapeutics, Inc.

Cambridge, MA · Feb 24, 2010 → Dec 5, 2014 · 3 filings
  • Dec 5, 2014 · D · $20,000,010 sold of $20,000,010 · 10 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 13, 2010 · D/A · $8,750,000 sold of $35,000,000 · 3 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗
  • Feb 24, 2010 · D · $4,500,000 sold of $35,000,000 · 2 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗

Raised $20M from 10 investors (100% of the $20M target) as of the latest filing. Cary is listed as director, executive officer on 3 filings for this deal.

Latest filing on EDGAR ↗
Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: 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.

EP
Pharmaceuticals

Edimer Pharmaceuticals, Inc.

Cambridge, MA · Aug 7, 2013
  • Aug 7, 2013 · D · $9,794,352 sold of $18,000,000 · 5 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $9.79M from 5 investors (54% of the $18M target) as of the latest filing. Cary is listed as director.

Latest filing on EDGAR ↗
Sources

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

TB
Biotechnology

TARIS BIOMEDICAL INC

Lexington, MA · Apr 2, 2013
  • Apr 2, 2013 · D/A · $13,500,000 sold of Indefinite · 11 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $18.4M from 11 investors as of the latest filing. Cary is listed as director.

Latest filing on EDGAR ↗
Sources

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

Other pages with the same name (1)

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

  • Cary G. Pfeffer — MD, 1 issuer, Oct 25, 2023 → Oct 25, 2023 · no shared issuer

People around Cary 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.

TR
Management entity

Third Rock Ventures GP IV, L.P.

Promoter · 1 shared filing (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

TG
Management entity

TRV GP IV, LLC

Promoter · 1 shared filing (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

TR
Management entity

Third Rock Ventures GP V, L.P.

Promoter · 1 shared filing (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

TG
Management entity

TRV GP V, LLC

Promoter · 1 shared filing (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

TR
Management entity

Third Rock Ventures GP VI, L.P.

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

TG
Management entity

TRV GP VI, LLC

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Abbie Celniker

Executive Officer, Director · 6 shared filings (4 issuers) · also on 7 other issuers

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

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

Robert Tepper

Director, Executive Officer · 6 shared filings (5 issuers) · also on 10 other issuers

Robert Tepper is on 15 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

Kim C. Drapkin

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Stephen Sherwin

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Jeffrey Bluestone

Director · 3 shared filings (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Dan Matloff

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Ryan Cohlhepp

Executive Officer · 3 shared filings (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Noubar Afeyan

Director · 2 shared filings (1 issuer) · also on 13 other issuers

Noubar Afeyan is on 14 issuers in total — a repeat sponsor. Their page lists every one.

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

Robert Kamen

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Kevin Gillis

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

Kevin Gillis is on 6 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

Mark Levin

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

Mark Levin is on 9 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

David Berry

Director · 2 shared filings (1 issuer) · also on 13 other issuers

David Berry is on 14 issuers in total — a repeat sponsor. Their page lists every one.

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

Neil Exter

Executive Officer · 2 shared filings (2 issuers) · also on 5 other issuers

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

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

Jeffrey Tong

Executive Officer · 2 shared filings (2 issuers) · also on 3 other issuers

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

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

Wendy L. Dixon

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Richard Murray

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Craig Muir

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

J. Duncan Higgons

Director · 2 shared filings (1 issuer)

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Sanjay Keswani

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Reid Huber

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

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

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

Alexis Borisy

Executive Officer · 1 shared filing (1 issuer) · also on 15 other issuers

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

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

Michael Cima

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

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

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

Robert Langer

Director · 1 shared filing (1 issuer) · also on 47 other issuers

Robert Langer is on 48 issuers in total — a repeat sponsor. Their page lists every one.

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

Michael Greeley

Director · 1 shared filing (1 issuer) · also on 17 other issuers

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

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

Paul Chaney

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Mitchell S. Bloom

Executive Officer · 1 shared filing (1 issuer) · also on 11 other issuers

Mitchell S. Bloom is on 12 issuers in total — a repeat sponsor. Their page lists every one.

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

Dennis Ausiello

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

Listed on the same filings as Cary Pfeffer. 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.

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

Edward Kania

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

David Mott

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

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

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

Duncan Higgons

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Diane Marcou

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

Perry Karsen

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

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

William Aliski

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

Listed on the same filings as Cary Pfeffer. Their page shows their other deals.

The team behind the deals

TR
Sponsor group

Third Rock

7 issuers · 15 filings · $2.62B reported sold · 2010–2026

One team, 7 deal companies. Cary Pfeffer is listed on 3 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 Cary Pfeffer.

Same business address

32 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 9 issuers this person is listed on appears in Form ADV (searched 24,962 advisers as of Oct 2, 2026). A person is never an adviser firm; Form ADV is checked for the issuers and the management companies they are listed with.

Other offering types (Regulation A and Regulation Crowdfunding)

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

Property records none — individuals are not matched

Property records are matched to companies only, never to individuals, so none are matched to Cary Pfeffer by design. Searched property records in Hillsborough County FL (Clerk recorded-document index Oct 14, 2026 to Oct 15, 2026 + FL DOR 2026 ownership roll), Miami-Dade County FL (FL DOR 2026 ownership roll), Harris County TX (HCAD 2026 ownership roll), Dallas County TX (DCAD 2026 ownership roll), New York City ACRIS documents and PLUTO ownership rows already retrieved for other issuers, Cook County IL sale and ownership rows already retrieved for other issuers (814,874 records as of Oct 23, 2026, 8:59 PM ET) for the 9 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers Cary Pfeffer is listed on: none on file. No website or social profile named in Third Rock Ventures VI, L.P.'s SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #152,822 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 (Boston, MA). Each opens in a new tab; what you find there is not verified by PartnerFacts.

Social and web

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

Courts

CourtListener / RECAP (federal) ↗PACER case locator (federal, login) ↗Massachusetts MassCourts ↗

Securities regulators

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

Business registries

Massachusetts Secretary of State business search ↗OpenCorporates ↗

Change history

No corrections have been requested for this page.

Every fact links to its public-record source. Plain-English notes next to a fact are our reading of that fact, not a rating. Request a correction · Facts policy

Request a correction

Free. Logged with status: received → under review → fixed / confirmed with source.

Add a response

If this is you or your firm, add a sourced explanation next to any fact. Reviewed before publishing.

Monitor this person

Members get an email when Cary Pfeffer appears on a new Form D, or when a court case or SEC action is matched to them. See plans →