United States · Investor

Third Rock Ventures

Filed with the SEC to raise a fund in Jun 2026, closing $1,105M. Last cheque observed Jul 2019.

QuietNew fund $1.1B, Jun 2026VC firm

Pre-seedBiotechPharmaceuticalsBio

Cheques on record
0%of best year0cheques in 12 months, 84 on record
Since the last cheque2671days00hrs00min00sec
Median round$56MCheque size, as they say$5.0M – $100MRounds led1 of 84Sole investor15 roundsExits5 from the portfolioMostly inUnited States, 95%
Pitch Third Rock Ventures

Third Rock Ventures highlights

  1. 01

    84 rounds on record

  2. 02

    Mostly Series A and Series B: 81% of its rounds

  3. 03

    Sole investor in 15 rounds, median $47M

  4. 04

    5 exits from the portfolio

What they do

Third Rock Ventures is a leading healthcare venture firm focused on advancing disruptive areas of science and medicineFrom their own website
Type
VC firm (from a list, unverified)
Cheque size
$5.0M – $100M as they say
Stages
Pre-seed
Sectors
BiotechPharmaceuticalsBio
Based in
Boston, United States
Cold pitches
Not accepted

The record

Every round we can evidence, newest first84 appearances

  1. 2019

    3 rounds

  2. Jul
    Revolution MedicinesSeries C · US · FinSMEs$100MWith 9 others
  3. May
    ThriveSeries A · US · FinSMEs$110MLed
  4. Apr
    Public food doctorCN$15MWith 3 others
  5. 2018

    6 rounds

  6. Aug
    AmbysSeries A · US · FinSMEs$140MWith 1 other
  7. Jun
    Decibel TherapeuticsSeries C · US · FinSMEs$55MWith 8 others
  8. May
    CasmaSeries A · US · FinSMEs$59MSole investor
  9. Apr
    Cedilla TherapeuticsSeries A · US · FinSMEs$56MSole investor
  10. Apr
    ConstellationUS · FinSMEs$100MWith 12 others
  11. Mar
    Rheos MediciesSeries A · US · FinSMEs$60MSole investor
  12. 2017

    5 rounds

  13. Dec
    RelaySeries B · US · FinSMEs$63MWith 5 others
  14. Oct
    PanOpticaSeries B · US · FinSMEs$11MWith 1 other
  15. May
    Magenta TherpeuticsSeries B · US · FinSMEs$50MWith 5 others
  16. Mar
    Tango TherapeuticsSeries A · US · FinSMEs$55MSole investor
  17. Feb
    RhythmUS · FinSMEs$41MWith 6 others
  18. 2016

    4 rounds

  19. Dec
    Goldfinch BioSeries A · US · FinSMEs$55MSole investor
  20. Nov
    Magenta TherapeuticsSeries A · US · FinSMEs$49MWith 1 other
  21. Sept
    Relay TherapeuticsSeries A · US · FinSMEs$57MSole investor
  22. Jul
    Fulcrum TherapeuticsSeries A · US · FinSMEs$55MSole investor
  23. 2015

    6 rounds

  24. Oct
    Decibel TherapeuticsSeries A$52MWith 2 others
  25. Oct
    Neon TherapeuticsSeries A · US$55MWith 2 others
  26. Aug
    Rhythm PharmaceuticalsSeries A · US$40MWith 7 others
  27. Aug
    Editas MedicineSeries B · US$120MWith 14 others
  28. Feb
    Revolution MedicinesSeries A · US$45MSole investor
  29. Jan
    CytomX TherapeuticsSeries C · US$20MWith 3 others
  30. 2014

    10 rounds

  31. Dec
    Allena PharmaceuticalsSeries B · US$25MWith 4 others
  32. Jul
    Corvia MedicalSeries D · US$34MWith 3 others
  33. May
    NurixSeries B · US$25MWith 1 other
  34. Apr
    Kala PharmaceuticalsSeries B · US$23MWith 5 others
  35. Apr
    PanOpticaSeries B · US$45MWith 2 others
  36. Mar
    NinePoint MedicalSeries B · US$34MWith 2 others
  37. Mar
    SAGE TherapeuticsSeries C · GB$38MWith 4 others
  38. Feb
    Voyager TherapeuticsSeries A · US$45MSole investor
  39. Jan
    IgenicaSeries C · US$14MWith 3 others
  40. Jan
    Blueprint MedicinesSeries B · US$25MWith 5 others
  41. 2013

    7 rounds

  42. Nov
    Editas MedicineSeries A · US · finsmes.com$43MWith 3 others
  43. Oct
    SAGE TherapeuticsSeries B · US · 4-traders.com$20MWith 1 other
  44. Jul
    AlcrestaSeries B · US · finsmes.com$10MWith 2 others
  45. Mar
    TARIS BiomedicalGrowth · US · sec.gov$14MWith 3 others
  46. Mar
    Corvia MedicalSeries A · US · sec.gov$11MWith 2 others
  47. Feb
    Kala PharmaceuticalsSeries A · US · finsmes.com$12MWith 3 others

An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.

The team

Named by the firm itself, on a filing, its Form ADV or its company registration15 named

ACAbbie CelnikerManager of the GPLLC.iFiling they signed
ABAlexis BorisyManager of the GPLLC.iFiling they signed
ACAlison ConnorsChief Financial OfficeriForm ADV
AVAndrea van ElsasManager of the GPLLC.iFiling they signed
CPCary PfefferManager of the GPLLC.iFiling they signed
CMCraig MuirManager of the GPLLC.iFiling they signed
DKDavid KaufmanManager of the GPLLC.iFiling they signed
JKJeffrey K TongManager of the GPLLC.iFiling they signed
JRJigar RaythathaManager of the GPLLC.iFiling they signed
KMKevin Michael GillisChief Operating OfficeriForm ADV
KSKevin StarrManager of the General Partner's general partner.iFiling they signed
MLMark LevinManager of the General Partner's general partner.iFiling they signed
NENeil ExterManager of the GPLLC.iFiling they signed
RMReid M HuberManager of the GPLLC.iFiling they signed
RIRobert Ira TepperManager of the General Partner's general partner.iFiling they signed

We also hold 41 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.

What the register says

From the firm's own filings with the SEC, which it must file accurately by law

$1.9Bgross assets of its fundsOct 2026
Exemptreporting adviserventure or small private funds
Legal name
Third ROCK Ventures, LLC
SEC number
CRD 161185

What they claim to have backed

From their own portfolio page (on their website)

0 of 1 we have independently watched raise

Syremis

Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded.

Exits from the portfolio

Companies it backed that were later bought or listed5 in all

Foundation MedicineBought by RocheUndisclosedJan 2015
Foundation MedicineListed$108MJul 2013
bluebird bioListed$101MJun 2013
Agios PharmaceuticalsListed$86MJun 2013
Alnara PharmaceuticalsBought by Eli LillyUndisclosedJul 2010

An exit counts when it came after the firm's first round in the company. From historical deal records.

Who they invest alongside

The investors most often in the same rounds as Third Rock Ventures. A count of rooms they were both in, not a relationship either has claimed.

Recently backed

The latest companies Third Rock Ventures put money into.

Quick answers about Third Rock Ventures

What does Third Rock Ventures invest in?

Third Rock Ventures invests most often at Series A and Series B (81% of the rounds on record), in sectors such as Biotech, Pharmaceuticals and Bio.

How active is Third Rock Ventures?

84 investments on record, 0 of them in the last 12 months, and it led 1. The most recent was in Jul 2019.

What has Third Rock Ventures invested in recently?

Its most recent investments on record: Revolution Medicines (Series C, Jul 2019), Thrive (Series A, May 2019) and Public food doctor (Undisclosed round, Apr 2019).

How big are Third Rock Ventures's cheques?

The median round it joins is $56M. It says it writes cheques of $5.0M to $100M.

Does Third Rock Ventures lead rounds?

Sometimes: it led 1 of its 84 investments on record (1%).

Where does Third Rock Ventures invest?

Most of the companies it backs are in the United States (95%).

Is Third Rock Ventures investing now?

No investments in the last 12 months; the latest was in Jul 2019.

Who does Third Rock Ventures invest alongside?

Most often The Column Group (11 rounds together), Casdin Capital (8 rounds together) and Polaris Partners (8 rounds together).

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Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it