# Triatomic Capital: portfolio, investments and team > Triatomic Capital is a private equity based in United States. 2 investments on record, 2 in the last 12 months, latest Sept 2026. Source: https://millionrounds.com/fund/triatomic-capital (Millionrounds; every figure on the page links to its filing or article) United States · [Investor](https://millionrounds.com/investors) # Triatomic Capital Last cheque observed Sep 2026; 2 cheques on record. Email Private equity Deploying now Last fund, Apr 2022 Seed Series A Series B Med Device Diagnostics Therapy Follow Triatomic Capital and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Ftriatomic-capital) Deploying now **100%** of best year **2** **cheques in 12 months**, 2 on record Since the last cheque **64** days **00** hrs **00** min **00** sec Median round **$200M** Cheque size, as they say **$250K – $25M** Rounds led **1 of 2** Pitch Triatomic Capital ## Triatomic Capital highlights - 01 2 cheques in the last 12 months - 02 Mostly Series B and Series C: 100% of its rounds - 03 Led 1 rounds ## What they do > Triatomic Capital is a research-driven venture firm that invests in transformative technology companies from their earliest stages. From their own website - **Type:** Private equity (from a list, unverified) - **Cheque size:** $250K – $25M as they say - **Stages:** Seed Series A Series B - **Sectors:** Med Device Diagnostics Therapy - **Based in:** Palo Alto, United States - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **2 appearances** - **2026** 1 round - **Sept** **[iPronics](https://millionrounds.com/company/ipronics)** Series B · ES · Amadeus Capital Partners **$125M** With 11 others - **2025** 1 round - **Nov** **[d-Matrix](https://millionrounds.com/company/d-matrix)** Series C · US · TechStartups **$275M** *Led* 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 Named by the firm itself, on a filing, its Form ADV or its company registration **5 named** JM **Jeffrey Mason Sauerhoff** Chief Financial Officer i Form ADV JT **Jeffrey Terrence Huber** Managing Partner i Form ADV NB **Nicholas Bourque** Chief Compliance Officer i Form ADV SI **Steven I (mio) Hochberg** Managing Partner i Form ADV X(**Xiaotong (Peter) Zhou** Chief Executive Officer / Limited Partner i Form ADV We also 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. ## What the register says From the firm's own filings with the SEC, which it must file accurately by law **$346M** assets it manages Oct 2026 **Registered** investment adviser full reporting to the SEC - **Legal name:** Triatomic Management LP - **SEC number:** CRD 312408 Funds on its Form ADV **7** private funds, **$182M** in gross assets · filed Nov 2024 Special purpose vehicle **5** Private equity **1** Hedge **1** - Triatomic Capital Private I L.P. *Private equity* 40 investors $131M - Triatomic Capital Hybrid Master L.P. *Hedge* 2 investors $38M - Triatomic Opportunity Fund I L.P. *Special purpose vehicle* 10 investors $4.2M - Hongkou Opportunity Fund II L.P. *Special purpose vehicle* 22 investors $4.0M - Triatomic Opportunity Fund III L.P. *Special purpose vehicle* 6 investors $2.0M - Hongkou Opportunity Fund III L.P. *Special purpose vehicle* 6 investors $1.4M - Hongkou Opportunity Fund V L.P. *Special purpose vehicle* 6 investors $800K ## What they claim to have backed From their own portfolio page (on their website) **9** of 14 we have independently watched raise [01 Atum Works](https://millionrounds.com/company/atum)[03 Chalk](https://millionrounds.com/company/chalk)[04 Chemify](https://millionrounds.com/company/chemify)[06 d-Matrix](https://millionrounds.com/company/d-matrix)[07 Edison Scientific](https://millionrounds.com/company/edison-scientific)[10 Gimlet Labs](https://millionrounds.com/company/gimlet-labs)[11 iPronics](https://millionrounds.com/company/ipronics)[12 Lyten](https://millionrounds.com/company/lyten)[15 Radical Numerics](https://millionrounds.com/company/radical-numerics) 02 Axiom 05 Coworker 09 Elegen 13 Manifold Efficient Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded. Latest fund on file **Raised** a fund in Apr 2022 From its SEC filing. Nothing newer is on file yet. ## The cheque Seed Series A Series B Median round joined **$200M** the round, not its cheque Led 1 of 2 rounds **50%** - **Said size:** $250K – $25M - **Sole investor:** Never alone - **Last cheque:** Sept 2026 Rounds by stage said on their site - Series B said *1* - Series C *1* - Seed said *-* - Series A said *-* Cheques by month Led Joined Dec 2023 Nov 2026 **Pitching Triatomic Capital?** 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 Triatomic Capital put money into. [**iPronics** $125M · Sept 2026](https://millionrounds.com/company/ipronics)[**d-Matrix** $275M · Nov 2025](https://millionrounds.com/company/d-matrix) ## Quick answers about Triatomic Capital ### What does Triatomic Capital invest in? Triatomic Capital invests most often at Series B and Series C (100% of the rounds on record), in sectors such as Med Device, Diagnostics and Therapy. ### How active is Triatomic Capital? 2 investments on record, 2 of them in the last 12 months, and it led 1. The most recent was in Sept 2026. ### What has Triatomic Capital invested in recently? Its most recent investments on record: iPronics (Series B, Sept 2026) and d-Matrix (Series C, Nov 2025). ### How big are Triatomic Capital's cheques? The median round it joins is $200M. It says it writes cheques of $250K to $25M. ### Is Triatomic Capital investing now? Yes: it is actively investing, with 2 investments in the last 12 months. ### What kind of investor is Triatomic Capital? Triatomic Capital is a private equity firm based in Palo Alto, United States. ### How much does Triatomic Capital manage? About $346M, as regulatory assets under management (Oct 2026). ### Has Triatomic Capital raised a new fund? Its latest fund filing with the SEC was in Apr 2022. ## 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=triatomic-capital) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=triatomic-capital)