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

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Sarah Larson

Named as an officer, director or promoter on SEC Form D filings · MA · Jun 7, 2019 → Jun 7, 2019

1deal (issuers)
$750Mreported sold
67investors
1Form D filing
2019year on file

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:44 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

Sarah Larson is listed as an executive officer on 1 SEC Form D filing by 1 issuer in Jun 2019: Third Rock Ventures V, L.P. (Boston, MA — pooled investment fund — 2019; $750M reported sold to 67 investors).

What this means One deal on file with the SEC, filed Jun 2019. A Form D is the notice a company files after it starts selling a private investment — it is a notice, not an approval.

Listed alongside Abbie Celniker (1 shared filing), Cary Pfeffer (1 shared filing), Christoph Lengauer (1 shared filing), Craig Muir (1 shared filing), Jeffrey Tong (1 shared filing) and 7 others.

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

The issuer belongs 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) — 13 bankruptcy cases matching the name listed in Key records below.

What this means 13 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.

What the community is saying

Community search for Sarah Larson 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, 2:44 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 Sarah Larson..

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

13 cases: 13 closed (disposition not in docket feed)

Sarah Larson and William Larson closed
United States Bankruptcy Court, W.D. Wisconsin · No. 3-24-11510 · Filed Jul 30, 2024 · Closed Nov 12, 2024
Role of Sarah Larson and William Larson: Debtor · Outcome: Case closed 2024-11-12 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in WI (not a filing state)
Sarah J. Larson closed
United States Bankruptcy Court, N.D. Iowa · No. 23-00410 · Filed May 18, 2023 · Closed Sep 6, 2023
Role of Sarah J. Larson: Debtor · Outcome: Case closed 2023-09-06 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in IA (not a filing state)
Sarah Larson closed
United States Bankruptcy Court, S.D. Texas · No. 21-31199 · Filed Apr 6, 2021 · Closed Jul 13, 2021
Role of Sarah Larson: Debtor · Outcome: Case closed 2021-07-13 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in TX (not a filing state)
Sarah J Larson closed
United States Bankruptcy Court, W.D. Wisconsin · No. 1-19-12899 · Filed Aug 28, 2019 · Closed Dec 13, 2019
Role of Sarah J Larson: Debtor · Outcome: Case closed 2019-12-13 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in WI (not a filing state)
Sarah D. Larson (TRNSFD TO WESTERN DIV) closed
United States Bankruptcy Court, W.D. Missouri · No. 18-50395 · Filed Sep 14, 2018 · Closed Jan 7, 2019
Role of Sarah D. Larson: Debtor · Outcome: Case closed 2019-01-07 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in MO (not a filing state)
Sarah L. Larson and Jason A. Larson closed
United States Bankruptcy Court, E.D. Wisconsin · No. 13-26198 · Filed May 6, 2013 · Closed Aug 23, 2013
Role of Sarah L. Larson and Jason A. Larson: Debtor · Outcome: Case closed 2013-08-23 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in WI (not a filing state)
Sarah J Larson and Scott Larson closed
United States Bankruptcy Court, W.D. Wisconsin · No. 3-12-11540 · Filed Mar 21, 2012 · Closed Jul 2, 2012
Role of Sarah J Larson and Scott Larson: Debtor · Outcome: Case closed 2012-07-02 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in WI (not a filing state)
Sarah R Larson closed
United States Bankruptcy Court, D. North Dakota · No. 10-31418 · Filed Nov 16, 2010 · Closed Mar 9, 2011
Role of Sarah R Larson: Debtor · Outcome: Case closed 2011-03-09 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in ND (not a filing state)
Brian R. Larson and Sarah J. Larson closed
United States Bankruptcy Court, N.D. Iowa · No. 07-00038 · Filed Jan 11, 2007 · Closed May 16, 2007
Role of Sarah J. Larson: Debtor · Outcome: Case closed 2007-05-16 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in IA (not a filing state)
Richard W Larson and Sarah F. Larson closed
United States Bankruptcy Court, M.D. Florida · No. 2:04-bk-20697 · Filed Oct 23, 2004 · Closed Feb 22, 2005
Role of Sarah F. Larson: Debtor · Outcome: Case closed 2005-02-22 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in FL (not a filing state)
Richard W Larson and Sarah F Larson closed
United States Bankruptcy Court, M.D. Florida · No. 2:03-bk-13190 · Filed Jun 25, 2003 · Closed May 24, 2004
Role of Sarah F Larson: Debtor · Outcome: Case closed 2004-05-24 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in FL (not a filing state)
Mark Ivan Larson and Sarah Larson closed
United States Bankruptcy Court, D. Utah · No. 00-21020 · Filed Jan 31, 2000 · Closed Jun 7, 2000
Role of Sarah Larson: Debtor · Outcome: Case closed 2000-06-07 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in UT (not a filing state)
SARAH L LARSON closed
United States Bankruptcy Court, D. Minnesota · No. 96-60023 · Filed Jan 8, 1996 · Closed Apr 26, 1996
Role of SARAH L LARSON: Debtor · Outcome: Case closed 1996-04-26 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same full name (a name found in 33 federal dockets); court in MN (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, 2:44 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

No differences found between the public filings we have for Sarah Larson (compared 1 filing on Oct 24, 2026).

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 1 offering — no sales commissions, finder's fees or proceeds to insiders

Per-offering detail
Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
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 ↗

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 1

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

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. Sarah 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.

People around Sarah 12

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

Management entity

Third Rock Ventures GP V, L.P.

Promoter · 1 shared filing (1 issuer)

Listed on the same filings as Sarah Larson. Their page shows their other deals.

Management entity

TRV GP V, LLC

Promoter · 1 shared filing (1 issuer)

Listed on the same filings as Sarah Larson. 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 · 1 shared filing (1 issuer) · also on 10 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

Executive Officer · 1 shared filing (1 issuer) · also on 14 other issuers

Robert Tepper is on 15 issuers in total — a repeat sponsor. Their page lists every one.

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

Kevin Gillis

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

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

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

Cary Pfeffer

Executive Officer · 1 shared filing (1 issuer) · also on 8 other issuers

Cary Pfeffer is on 9 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 · 1 shared filing (1 issuer) · also on 6 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 · 1 shared filing (1 issuer) · also on 4 other issuers

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

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

Christoph Lengauer

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

Listed on the same filings as Sarah Larson. 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 · 1 shared filing (1 issuer) · also on 2 other issuers

Listed on the same filings as Sarah Larson. Their page shows their other deals.

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

Steven Kafka

Executive Officer · 1 shared filing (1 issuer)

Listed on the same filings as Sarah Larson. 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 · 1 shared filing (1 issuer) · also on 5 other issuers

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

The team behind the deals

Sponsor group

Third Rock

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

One team, 7 deal companies. Sarah Larson is listed on 1 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 Sarah Larson.

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 1 issuer 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 Sarah Larson 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 1 issuer this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers Sarah Larson is listed on: none on file. No website or social profile named in Third Rock Ventures V, L.P.'s SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #233,562 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.

Change history

No corrections have been requested for this page.

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