# Reaction Fund: portfolio, investments and team > Reaction Fund is a vc firm based in United States. 1 investment on record, latest Aug 2025. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/reaction (Millionrounds; every figure on the page links to its filing or article) United States · [Investor](https://millionrounds.com/investors) # Reaction Fund Last cheque observed Aug 2025. Silence since then is not evidence of inactivity: our sources miss unannounced rounds. Email VC firm Quiet Seed Series A Series B Health Technology Climate Innovation Follow Reaction Fund and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Freaction) Cheques on record **0%** of best year **0** **cheques in 12 months**, 1 on record Since the last cheque **436** days **00** hrs **00** min **00** sec Median round **$12M** Rounds led **0 of 1** Pitch Reaction Fund ## Reaction Fund highlights - 01 1 rounds on record - 02 Mostly Seed: 100% of its rounds ## What they do > We invest in proven leaders with world changing potential and scale their innovations globally. From their own website - **Type:** VC firm (from a list, unverified) - **Cheque size:** Not stated - **Stages:** Seed Series A Series B - **Sectors:** Health Technology Climate Innovation - **Based in:** Palo Alto, United States - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **1 appearances** - **2025** 1 round - **Aug** **[Splight](https://millionrounds.com/company/splight)** Seed · US · TechStartups **$12M** With 11 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 We hold **5** 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. ## The cheque Seed Series A Series B Median round joined **$12M** the round, not its cheque Led 0 of 1 rounds **0%** - **Sole investor:** Never alone - **Last cheque:** Aug 2025 Rounds by stage said on their site - Seed said *1* - Series A said *-* - Series B said *-* Cheques by month Led Joined Dec 2023 Nov 2026 **Pitching Reaction Fund?** Put them on your fundraising board with this record on the card, and follow them to hear when they write a new cheque. Add to your CRM *→* ## Recently backed The latest companies Reaction Fund put money into. [**Splight** $12M · Aug 2025](https://millionrounds.com/company/splight) ## Quick answers about Reaction Fund ### What does Reaction Fund invest in? Reaction Fund invests most often at Seed (100% of the rounds on record), in sectors such as Health Technology and Climate Innovation. ### How active is Reaction Fund? 1 investments on record, 0 of them in the last 12 months. The most recent was in Aug 2025. ### What has Reaction Fund invested in recently? Its most recent investments on record: Splight (Seed, Aug 2025). ### How big are Reaction Fund's cheques? The median round it joins is $12M. ### Is Reaction Fund investing now? No investments in the last 12 months; the latest was in Aug 2025. ### What kind of investor is Reaction Fund? Reaction Fund is a VC firm based in Palo Alto, United States. ### When was Reaction Fund founded? Reaction Fund was founded in 2019. ### Where does this information on Reaction Fund come from? From 2 articles and filings naming it in a round, public registers and its own website, checked and rebuilt every night. ## Raising now? Find the investors who back rounds like yours, and keep every conversation on one fundraising board. Find similar investorsOpen your CRM Built from the rounds we watched, its filings and its own website, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections?slug=reaction) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=reaction)