# Bolt Threads funding: rounds and investors > Bolt Threads has raised $163M across 3 rounds since 2014. Investors include Founders Fund, Foundation Capital and Mission Bay Capital. Source: https://millionrounds.com/company/bolt-threads (Millionrounds; every figure on the page links to its filing or article) United States · [Series D startup](https://millionrounds.com/companies) # Who invested in *Bolt Threads* 3 rounds we have observed, with the 11 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. Manufacturing Funding summary Updated 26 Oct 2026 **$163M** raised across 3 rounds since 2014, from 3 sources **$7.7M** Series A **$32M** Series B **$123M** Series D - **Latest round:** Series D, $123M Jan 2017 - **Step-up i:** 3.8× - **Investors:** 11 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. 2015 2016 2017 **$7.7M** Series A **$32M** Series B **$123M** Series D - **First round:** Series A, $7.7M - **Biggest round:** $123M - **Usual gap between rounds:** 19 months ## The rounds - **Jan 2017** Series D **$123M** *4 new* *1 returning* [Founders Fund](https://millionrounds.com/fund/founders-fund) [Temasek Holdings](https://millionrounds.com/fund/temasek) [Fidelity](https://millionrounds.com/fund/fidelity) [Allen & Company](https://millionrounds.com/fund/allen-and-company) Baillie Gifford/ Formation 8 Reported by TechCrunch - **Jun 2015** Series B **$32M** *3 new* *3 returning* [Founders Fund](https://millionrounds.com/fund/founders-fund) [Foundation Capital](https://millionrounds.com/fund/foundation-capital) [Formation 8](https://millionrounds.com/fund/formation-8) [Mission Bay Capital](https://millionrounds.com/fund/mission-bay-capital) [Alafi Capital](https://millionrounds.com/fund/alafi-capital) [Zygote Ventures](https://millionrounds.com/fund/zygote-ventures) From a historical funding record SEC filing: $32M sold, first sale Apr 2014 - **Nov 2014** Series A **$7.7M** *4 new* [SVB Capital](https://millionrounds.com/fund/svb-capital) [Foundation Capital](https://millionrounds.com/fund/foundation-capital) [Mission Bay Capital](https://millionrounds.com/fund/mission-bay-capital) [Zygote Ventures](https://millionrounds.com/fund/zygote-ventures) From a historical funding record ## Founders and team From the SEC filings it signed: 2 on the team. - **Daniel Widmaier** Executive Officer, Director i - **Ethan Mirsky** Executive Officer i On the board, as filed i *David Breslauer* *Jerry Fiddler* *Jim Kim* *Steven Vassallo* ## 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 A** 2014 **Series B** 2015 **Series D** 2017 [Founders Fund](https://millionrounds.com/fund/founders-fund) [Foundation Capital](https://millionrounds.com/fund/foundation-capital) [Mission Bay Capital](https://millionrounds.com/fund/mission-bay-capital) [Zygote Ventures](https://millionrounds.com/fund/zygote-ventures) [SVB Capital](https://millionrounds.com/fund/svb-capital) [Temasek Holdings](https://millionrounds.com/fund/temasek) [Fidelity](https://millionrounds.com/fund/fidelity) [Formation 8](https://millionrounds.com/fund/formation-8) [Allen & Company](https://millionrounds.com/fund/allen-and-company) [Alafi Capital](https://millionrounds.com/fund/alafi-capital) ## Everyone who backed them [Founders Fund](https://millionrounds.com/fund/founders-fund) VC firm **2** rounds [Foundation Capital](https://millionrounds.com/fund/foundation-capital) VC firm **2** rounds [Mission Bay Capital](https://millionrounds.com/fund/mission-bay-capital) VC firm **2** rounds [Zygote Ventures](https://millionrounds.com/fund/zygote-ventures) Angel network **2** rounds [SVB Capital](https://millionrounds.com/fund/svb-capital) VC firm **1** round [Temasek Holdings](https://millionrounds.com/fund/temasek) VC firm **1** round [Fidelity](https://millionrounds.com/fund/fidelity) VC firm **1** round [Formation 8](https://millionrounds.com/fund/formation-8) VC firm **1** round [Allen & Company](https://millionrounds.com/fund/allen-and-company) Wealth manager **1** round [Alafi Capital](https://millionrounds.com/fund/alafi-capital) Growth equity **1** round Baillie Gifford/ Formation 8 no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=bolt-threads). ## Quick answers about Bolt Threads ### Who invested in Bolt Threads? Bolt Threads's investors include Founders Fund, Foundation Capital, Mission Bay Capital, Zygote Ventures and SVB Capital, and 6 more on record. ### How much has Bolt Threads raised? Bolt Threads has raised $163M across 3 rounds since 2014. ### When did Bolt Threads last raise? Bolt Threads's most recent round was a Series D of $123M in Jan 2017. ### What was Bolt Threads's biggest round? Its most recent round, $123M in Jan 2017, is also its largest on record. ### Who backed Bolt Threads first? Bolt Threads's first round on record, in Nov 2014, was backed by SVB Capital, Foundation Capital and Mission Bay Capital and 1 others. ### What stage is Bolt Threads at? Bolt Threads's latest named round is a Series D, in Jan 2017. ### Where is Bolt Threads based? Bolt Threads is based in the United States. ## Companies like Bolt Threads In the same sector, and raised in the last eighteen months. [**Apex** $1.1B · Oct 2026](https://millionrounds.com/company/apex)[**ZwitterCo** $58M · Oct 2026](https://millionrounds.com/company/zwitterco)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Arda** $233M · Oct 2026](https://millionrounds.com/company/arda)[**Origin** $121M · Oct 2026](https://millionrounds.com/company/origin)[**Jeevy Fabrication** Oct 2026](https://millionrounds.com/company/jeevy-fabrication) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app