Stack Infrastructure
SelectiveDenver, COHealthcare, Biotechnology, RetailingLast fund filed 2025
7 on a current fund
last 24 months
across filed funds
| Vehicle | Filed | Target | Sold to date | Investors |
|---|---|---|---|---|
| STACK INFRASTRUCTURE USA III FOREIGN | 2025 | $125,000 | $125,000 | 125 |
| STACK Infrastructure USA III | 2023 | $125,000 | $125,000 | 125 |
| STACK Infrastructure USA II | 2021 | $125,000 | $125,000 | 125 |
Amounts are Item 13 as filed: the target is the whole offering, and the amount sold is cumulative across amendments rather than a final close. The filing carries no per-investor amount, so a firm’s own cheque is not recoverable here.
10 partners are named across this firm’s filings, 7 of them on a fund it is deploying now.
| Partner | Activity | Categories | Board seats | Last 24mo |
|---|---|---|---|---|
| Brian Cox | Slowing | Medical devices, Enterprise software, Sales & marketing tech | 8 | 1 |
| Joshua Friedman | Slowing | E-commerce & marketplaces, Real estate & proptech | 2 | 1 |
| Thomas LynchNot on the current fund | Slowing | Biotech & pharma, Enterprise software, Digital health | 13 | 1 |
| Heather PaduckNot on the current fund | Quiet | None listed | 0 | 0 |
| Jeffrey FelderNot on the current fund | Quiet | None listed | 0 | 0 |
| Lauren Sullivan | Quiet | Digital health | 1 | 0 |
| Matthew A'Hearn | Quiet | Medical devices, Climate & energy, Manufacturing & industrials | 13 | 0 |
| Philip Koen | Quiet | Enterprise software, Sales & marketing tech | 2 | 0 |
| Robert Hartog | Quiet | None listed | 0 | 0 |
| Sean Ivery | Quiet | None listed | 0 | 0 |
Activity is filed board seats in the last 24 months: 4+ Active, 2–3 Selective, 1 Slowing, none Quiet. A firm's tier totals its partners, so an active firm may be four partners with one seat each. It undercounts partners who invest without taking a board seat, and filings lag a closing by weeks, so Quiet means the paperwork is quiet, not the person.
Classified sectors of Stack Infrastructure’s own portfolio companies, based on 32 with a verified or cited source.
Not a filing value: this is Lev’s own classification of each company, one company one vote regardless of how many of Stack Infrastructure’s partners are named on its board, shown only when we found a specific, checkable source. Companies with no source read as unclassified and are left out of the shares above.
| Firm | Shared boards | Companies |
|---|---|---|
| IPI Partners | 25 | AQ Sunshine Parent, AquaHydrex, ASPi Solutions, Bainbridge Health, Celsius Holdings, CPD to SPD, CULTIVATE MD CAPITAL FUND I, Cultivate MD Capital Fund II, cultivate(MD) Capital Accelerator Fund, Evofem Biosciences, FUSION RECRUITING LABS, Genesis Innovation Group, Genesis Software Innovations, HAPPE Spine, Magnesium Development Company, MRGB Hold, MRMMK Hold, Nanostone Water, Orexigen Therapeutics, PROFECTUS BIOSCIENCES, SHOULDER INNOVATIONS, Solecta, Synata Bio, THERMO FISHER SCIENTIFIC, XOS Technologies |
| U.S Venture Partners | 4 | Inari Medical, Okami Medical, Sequent Medical, SHOULDER INNOVATIONS |
| Domain Partners | 3 | Evofem Biosciences, Orexigen Therapeutics, Sequent Medical |
| Versant Affiliates | 3 | Inari Medical, Okami Medical, Sequent Medical |
| Versant Venture Capital | 3 | Inari Medical, Okami Medical, Sequent Medical |
| Canvas Ventures | 1 | Float Health |
| Lightstone Singapore | 1 | SHOULDER INNOVATIONS |
| Lightstone Ventures | 1 | SHOULDER INNOVATIONS |
A shared board seat: a company where filings name a Stack Infrastructure partner and a partner at the other firm, both with a clean identity match. Not a claim either firm led or co-led the round, only that both are named on the same board.