About Brookside Capital
Brookside Capital is a venture capital firm founded in 1989. It is primarily based out of San Francisco, United States. As of Jan 2016, Brookside Capital has invested in 27 companies. It primarily invests in Series C round in United States based startups. Its investments are spread across a wide range of sectors from Life Sciences to Enterprise Applications and High Tech. Most recently it participated in the $***** Series E round of Anaplan Overall, Brookside Capital portfolio has seen 1 unicorn, 6 IPOs and 17 acquisitions including key companies like DocuSign, PTC Therapeutics and Anaplan. A lot of funds co-invest with Brookside Capital, with names like Wellington sharing a substantial percentage of its portfolio.Key Metrics
Portfolio Count
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Series C, Series B & 6 more
Portfolio IPOs
Portfolio Acquisitions
Portfolio Unicorns
Brookside Capital's List of Top Investments
Brookside Capital has a portfolio of 27 companies, one of which is a Unicorn. Their most notable investments are in Thumbplay and DocuSign.Their portfolio spans across United States, China and Singapore. They have invested in Life Sciences, Enterprise Applications, High Tech and 7 other sectors, across stages such as Series C, Series B and 6 more. Here is the list of top investments by Brookside Capital:
1. DocuSign
Provider of electronic signature and intelligent agreement management platform solutions. The platform offers tools for contract lifecycle management, agreement preparation, and agreement workflow automation. It provides features such as electronic notarization, web forms, and multi-channel delivery options. The platform extends its capabilities through integrations, APIs, and a mobile application.
Key facts about DocuSign
- Founded Year: 2003
- Location: San Francisco (United States)
- Annual Revenue: $3.22B as on Jan 31, 2026
- Stage: Public
- Total Funding till date: $520M
- Employee Count: 8,397 as on Apr 30, 2026
- Investors: HTIF, Glynn Capital and 87 Others
- Latest Funding Round: Post IPO, Jul 20, 2020, $*****
- Highlight: Public
Developer of small molecule drugs for the treatment of rare diseases. The company's lead product Ataluren is an orally administered small-molecule drug for the treatment of cystic fibrosis and Duchenne muscular dystrophy caused by nonsense mutations. Also, developing anticancer and antibacterial drugs.
Key facts about PTC Therapeutics
- Founded Year: 1998
- Location: South Plainfield (United States)
- Annual Revenue: $1.73B as on Dec 31, 2025
- Stage: Public
- Total Funding till date: $248M
- Employee Count: 1,148 as on Apr 30, 2026
- Investors: Athyrium Capital Management, BB Biotech and 27 Others
- Latest Funding Round: Post IPO, May 16, 2023, $*****
- Highlight: Public
3. Anaplan
Provider of cloud-based platform for scenario planning, analysis, and reporting. The platform offers applications for finance, sales, marketing, supply chain, and human resources. It provides data management, modeling, and planning experience capabilities. The platform also features AI agents for real-time scenario modeling.
Key facts about Anaplan
- Founded Year: 2006
- Location: San Francisco (United States)
- Annual Revenue: $592M as on Jan 31, 2022
- Last Known Valuation: $*****
- Stage: Acquired
- Total Funding till date: $300M
- Employee Count: 2,830 as on Apr 30, 2026
- Investors: Meritech, HTIF and 27 Others
- Latest Funding Round: Series F, Dec 05, 2017, $*****
- Highlight: Acquired
Developer of gene therapy for rare diseases. It offers engineered adeno associated viruses to deliver the target gene sequence to the patient for RPE-65 mediated inherited retinal dystrophies. The company is also developing therapies for choroideremia, hemophilia A&B, and neurodegenerative diseases such as Batten's disease.
Key facts about Spark Therapeutics
- Founded Year: 2013
- Location: Philadelphia (United States)
- Annual Revenue: $64.7M as on Dec 31, 2018
- Last Known Valuation: $*****
- Stage: Acquired
- Total Funding till date: $82.8M
- Employee Count: 304 as on Mar 31, 2026
- Investors: Brookside Capital, Wellington and 6 Others
- Latest Funding Round: Series B, May 23, 2014, $*****
- Highlight: Acquired
5. Youku Tudou
Youku Tudou is a video streaming platform. It uses tri-networks integration model applied on this video-sharing platform that enables users to search, view, and share high-quality video content quickly and easily across multiple devices. Youku Tudou’s offerings are not limited to original user-generated content. Its online video content ranges from user-generated content and self-produced serials to licensed professional content. Offers a space for both individuals and institutions to upload and share their moments, independent films, viral videos, and anything else they create.
Key facts about Youku Tudou
- Founded Year: 2006
- Location: Shanghai (China)
- Stage: Acquired
- Total Funding till date: $110M
- Employee Count: 353 as on Apr 30, 2026
- Investors: Western Technology Investment, Brookside Capital and 14 Others
- Latest Funding Round: Post IPO, Apr 28, 2014, $*****
- Highlight: Acquired
Brookside Capital's Investments by Stage
Brookside Capital is primarily an Late Stage Investor investor majorly investing in Series C (9) rounds where average round size is $503M, Series B (6) rounds where average round size is $311M and Series A (3) rounds where average round size is $129M.Stage of entry | No. of Investments |
|---|---|
Series C | 9 |
Series B | 6 |
Series A | 3 |
Series E | 3 |
Series D | 2 |
Others | 3 |
Note: We have considered here, only first round of investments
Brookside Capital's Investments by Sector
Brookside Capital has a diverse portfolio, with companies operating in the Life Sciences, Enterprise Applications, High Tech, Media & Entertainment and Sustainability Tech. Notably, it has invested in 26 Tech companies, 22 Enterprise (B2B) companies, 6 Consumer (B2C) companies and at least 6 companies focusing on Software.Sector | No. of Investments |
|---|---|
Life Sciences | 15 |
Enterprise Applications | 5 |
High Tech | 5 |
Media & Entertainment | 4 |
Sustainability Tech | 3 |
Others | 10 |
Note: We have considered here, only first round of investments
Brookside Capital's Investments by Geography
Brookside Capital has made most investments in United States (24), followed by China where it has made 1 investment.Country | No. of Investments |
|---|---|
United States | 24 |
China | 1 |
Singapore | 1 |
Note: We have considered here, only first round of investments
Brookside Capital's recent investments
Brookside Capital has not made any investment in 2026 so far.Here are the most recent investments by Brookside Capital:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Jan 14, 2016 | United States | Series E | 7511 | [+10] | |
Sep 08, 2015 | United States | Series C | 7578 | [+4] | |
Jul 23, 2015 | United States | Series B | 6110 | [+11] | |
Jul 22, 2015 | Singapore | Series A | 1682 | ||
May 28, 2015 | United States | Series D | 1377 | [+10] |
Unicorns in Brookside Capital's Portfolio
Brookside Capital has 1 unicorn in its portfolio - MuleSoft. The most recent unicorn in their portfolio is MuleSoft which became a unicorn in 2015.Here is a list of unicorns in Brookside Capital's portfolio:
Tracxn Score | Company | Short Description | Founded year | Sector | Location | Company Stage | First Investment/ Acquisition Details |
|---|---|---|---|---|---|---|---|
65 | Cloud based API management platform | 2006 | San Francisco | Series G | sdtjced |
IPOs and Publicly Listed companies in Brookside Capital's Portfolio
6 of Brookside Capital's portfolio companies have become public. DocuSign got listed on the National Association of Securities Dealers Automated Quotations (NASDAQ), in Apr 2018 at marketcap of $4.41B and Voyager Therapeutics got listed on the National Association of Securities Dealers Automated Quotations (NASDAQ) at marketcap of $364M.Here are Brookside Capital's portfolio companies that went public:
Company | IPO Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Apr 27, 2018 | Apr 30, 2015 | Series F | 1638 | |
Nov 11, 2015 | Apr 22, 2015 | Series B | 1667 | |
Sep 18, 2015 | Jan 23, 2015 | Series C | 4664 | |
Jun 20, 2014 | Dec 04, 2013 | Series E | 4599 | |
Jun 20, 2013 | Mar 07, 2013 | Series J | 2293 |
Acquired companies in Brookside Capital's Portfolio
17 companies from Brookside Capital's portfolio have been acquired. The most recent acquisition was Radius Health in Jan 2026 by B-FLEXION for $*****.Here are Brookside Capital's portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Jan 12, 2026 | May 25, 2011 | Series C | 1703 | |
Nov 25, 2024 | Jan 17, 2007 | Series C | 1443 | |
Mar 06, 2023 | Feb 28, 2014 | Series C | 9153 | |
Jan 19, 2023 | Nov 30, 2006 | Series B | 7818 | |
Mar 20, 2022 | May 23, 2014 | Series D | 6629 |
Co-investors of Brookside Capital
Over the past 26 years, 235 investors have co-invested in Brookside Capital's portfolio companies. This includes funds and angels.
- Invested before Brookside Capital: Accel, Sapphire Ventures and 96 others have invested in rounds before Brookside Capital. There are 2 companies where Accel has invested before Brookside Capital and 2 companies where Sapphire Ventures has invested before Brookside Capital.
- Top Co-investors of Brookside Capital: 80 investors entered a company along with Brookside Capital. These include investors like Wellington (3 companies).
- Invested after Brookside Capital: A total of 57 investors have invested in Brookside Capital's portfolio after their investments. Top Investors include Foresite Capital (2 companies), QVT Family Office (2 companies) and Janus Henderson Investors (2 companies).
Recent News related to Brookside Capital
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eBay Acquires eCommerce Platform Qoo10 Of JapanPYMNTS.com•Jul 20, 2018•eBay, Qoo10, eBay, Qoo10 and 5 others
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This Cloud-Based Unicorn Is Getting Ready to Go PublicInc.•Apr 18, 2016•Anaplan, Premji Invest, Baillie Gifford, Brookside Capital and 1 other
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Software firm Anaplan lands $90m, becomes latest UK-founded unicornUKTN•Jan 14, 2016•Anaplan, Baillie Gifford, Founders Circle Capital, Harmony Partners and 15 others
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REGENXBIO Secures $70.5 Million in a Mezzanine Financing Nasdaq:RGNXGlobeNewswire•May 20, 2015•Regenxbio, Foresite Capital, QVT Family Office, Jennison and 9 others
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MuleSoft’s Massive $128M Round Could Be Precursor To IPOTechCrunch+•May 19, 2015•MuleSoft, Cisco Investments, ServiceNow, Morgenthaler and 10 others
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DocuSign Raises $233 Million to Expand DocuSign Global Trust Network | DocuSignDocuSign•May 12, 2015•DocuSign, Generation Investment Management, Bain Capital Ventures, Brookside Capital and 13 others
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DocuSign Lands $233 Million Investment at $3 Billion Valuation - RecodeRecode•May 12, 2015•DocuSign, Generation Investment Management, Bain Capital Ventures, Brookside Capital and 13 others
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Voyager Therapeutics | Investors & Media | Press ReleaseVoyager Therapeutics•Apr 13, 2015•Voyager Therapeutics, Brookside Capital, Partner Fund Management, Wellington and 1 other
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