# a16z CSX: angel investments and portfolio > a16z CSX is an angel. 3 investments on record, latest May 2025. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/a16z-csx (Millionrounds; every figure on the page links to its filing or article) [Investor](https://millionrounds.com/investors) # a16z CSX Last cheque observed May 2025. Silence since then is not evidence of inactivity: our sources miss unannounced rounds. Email Angel Quiet Seed Pre-seed Follow a16z CSX and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fa16z-csx) Cheques on record **0%** of best year **0** **cheques in 12 months**, 3 on record Since the last cheque **526** days **00** hrs **00** min **00** sec Median round **$4.7M** Rounds led **2 of 3** Pitch a16z CSX ## a16z CSX highlights - 01 3 rounds on record - 02 Mostly Seed and Pre-seed: 100% of its rounds - 03 Led 2 rounds ## What they do - **Type:** Angel (from a list, unverified) - **Cheque size:** Not stated - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **3 appearances** - **2025** 2 rounds - **May** **[Oncade](https://millionrounds.com/company/oncade)** Seed · US · TechStartups **$4.0M** *Led* - **Mar** **[Rumi](https://millionrounds.com/company/rumi)** Pre-seed · Escape Velocity (Ev3 **$4.7M** *Led* - **2024** 1 round - **Oct** **[OpenGradient](https://millionrounds.com/company/opengradient)** Seed · US · AlleyWatch **$8.5M** With 14 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 cheque Seed Pre-seed Median round joined **$4.7M** the round, not its cheque Led 2 of 3 rounds **67%** - **Sole investor:** Never alone - **Last cheque:** May 2025 Rounds by stage said on their site - Seed *2* - Pre-seed *1* Cheques by month Led Joined Dec 2023 Nov 2026 Often in the room with - [A16z Crypto](https://millionrounds.com/fund/a16z-crypto) 2 **Pitching a16z CSX?** 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 *→* ## Who they invest alongside The investors most often in the same rounds as a16z CSX. A count of rooms they were both in, not a relationship either has claimed. [**A16z Crypto** VC firm **2** rounds together](https://millionrounds.com/fund/a16z-crypto) ## Recently backed The latest companies a16z CSX put money into. [**Oncade** $4.0M · May 2025](https://millionrounds.com/company/oncade)[**OpenGradient** $8.5M · Oct 2024](https://millionrounds.com/company/opengradient) ## Quick answers about a16z CSX ### What does a16z CSX invest in? a16z CSX invests most often at Seed and Pre-seed (100% of the rounds on record). ### How active is a16z CSX? 3 investments on record, 0 of them in the last 12 months, and it led 2. The most recent was in May 2025. ### What has a16z CSX invested in recently? Its most recent investments on record: Oncade (Seed, May 2025), Rumi (Pre-seed, Mar 2025) and OpenGradient (Seed, Oct 2024). ### How big are a16z CSX's cheques? The median round it joins is $4.7M. ### Is a16z CSX investing now? No investments in the last 12 months; the latest was in May 2025. ### Who does a16z CSX invest alongside? Most often A16z Crypto (2 rounds together). ### What kind of investor is a16z CSX? a16z CSX is an angel. ### Where does this information on a16z CSX come from? From 4 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=a16z-csx) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=a16z-csx)