United States · Venture startup

Who invested in Collegium Pharmaceutical

6 rounds we have observed, with the 12 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Funding summaryUpdated 26 Oct 2026

$103Mraised across 6 rounds since 2006, from 6 sources

$5.5MSeries C$20MSeries D$1.0MDebt$23MVenture$4.0MVenture$50MVenture
Latest round
Venture, $50MMar 2015
Step-upi
12.5×
Investors
12
See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2008201020122014
$5.5MSeries C$20MSeries D$1.0MDebt$23MVenture$4.0MVenture$50MVenture
First round
Series C, $5.5M
Nov 2006
Biggest round
$50M
Venture · Mar 2015
Usual gap between rounds
20 months
the median of 5

The rounds

  1. Mar 2015
    Venture$50M7 new4 returning

    From a historical funding recordSEC filing: $50M sold, first sale Mar 2015

  2. Oct 2013
    Venture$4.0M

    No investor was named in the report.

    Reported by sec.govSEC filing: $4.0M sold, first sale Aug 2013

  3. Feb 2012
    Venture$23M2 new

    Reported by masshightech.comSEC filing: $22M sold, first sale Feb 2012

  4. Mar 2010
    Debt$1.0M

    No investor was named in the report.

    From a historical funding recordSEC filing: $1.0M sold, first sale Mar 2010

  5. Jul 2008
    Series D$20M1 new2 returning

    From a historical funding record

  6. Nov 2006
    Series C$5.5M2 new

    From a historical funding record

Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

Series C2006Series D2008Debt2010Venture2012Venture2013Venture2015Boston Millennia PartnersFrazier Healthcare PartnersLongitude CapitalSkyline VenturesWestfield CorporationRA Capital ManagementTPGAdage Capital ManagementRock Springs CapitalEcoR1 Capital

Everyone who backed them

Boston Millennia PartnersPrivate equity3rounds
Frazier Healthcare PartnersPrivate equity2rounds
Longitude CapitalVC firm2rounds
Skyline VenturesVC firm2rounds
Westfield CorporationCorporate VC2rounds
RA Capital ManagementPrivate equity1round
TPGPrivate equity1round
Adage Capital ManagementAsset manager1round
Rock Springs CapitalHedge fund1round
EcoR1 CapitalPrivate equity1round
Aperture Venture PartnersVC firm1round
Eventide Asset ManagementInvestment firm1round

Missing a round, or an investor who was in one? Tell us.

Quick answers about Collegium Pharmaceutical

Who invested in Collegium Pharmaceutical?

Collegium Pharmaceutical's investors include Boston Millennia Partners, Frazier Healthcare Partners, Longitude Capital, Skyline Ventures and Westfield Corporation, and 7 more on record.

How much has Collegium Pharmaceutical raised?

Collegium Pharmaceutical has raised $103M across 6 rounds since 2006.

When did Collegium Pharmaceutical last raise?

Collegium Pharmaceutical's most recent round was a Venture of $50M in Mar 2015.

What was Collegium Pharmaceutical's biggest round?

Its most recent round, $50M in Mar 2015, is also its largest on record.

Who backed Collegium Pharmaceutical first?

Collegium Pharmaceutical's first round on record, in Nov 2006, was backed by Boston Millennia Partners and Westfield Corporation.

What stage is Collegium Pharmaceutical at?

Collegium Pharmaceutical's latest named round is a Venture, in Mar 2015.

Where is Collegium Pharmaceutical based?

Collegium Pharmaceutical is based in the United States.

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