Who owns Tempest Therapeutics, Inc. (TPST)
Which tracked institutional funds hold TPST, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TPST company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on TPST is one-sided between 2025-Q4 and 2026-Q1: 0 added or opened and 2 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TPST’s largest tracked holder by dollar value, TANG CAPITAL MANAGEMENT LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in TPST divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 22 tracked filers holding TPST, 8 increased or opened the position and 7 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TPST between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Largest trims
- SABBY MANAGEMENT, LLC$483K
- Versant Venture Management, LLC$332K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Versant Venture Management, LLC | 269,772 | $442K | 14.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 233,888 | $384K | 12.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 86,990 | $143K | 4.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 68,908 | $113K | 3.8% | 2026-Q1 |
| BlackRock, Inc. | 39,068 | $64K | 2.2% | 2026-Q1 |
| FMR LLC | 33,225 | $54K | 1.8% | 2026-Q1 |
| SABBY MANAGEMENT, LLC trimmed | 17,856 | $29K | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP | 14,053 | $23K | 0.8% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP | 11,444 | $19K | 0.6% | 2026-Q1 |
| UBS Group AG trimmed | 4,533 | $7K | 0.2% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 2,790 | $5K | 0.2% | 2026-Q1 |
| MORGAN STANLEY | 2,058 | $3K | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 1,529 | $2K | 0.1% | 2026-Q1 |
| Federation des caisses Desjardins du Quebec | 292 | $479 | 0.0% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP | 239 | $413 | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 168 | $276 | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. | 56 | $92 | 0.0% | 2026-Q1 |
| Parallel Advisors, LLC | 18 | $30 | 0.0% | 2026-Q1 |
| CITIGROUP INC trimmed | 8 | $13 | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 5 | $8 | 0.0% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS | 3 | $5 | 0.0% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 27 | — | 0.0% | 2026-Q1 |
| TANG CAPITAL MANAGEMENT LLC new | 138,962 | $945K | 31.7% | 2025-Q2 stale |
| VANGUARD GROUP INC | 162,560 | $467K | 15.7% | 2025-Q4 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 114,559 | $85K | 2.8% | 2025-Q1 stale |
| Belvedere Trading LLC new | 5,325 | $55K | 1.8% | 2025-Q3 stale |
| DAVENPORT & Co LLC | 50,000 | $37K | 1.2% | 2025-Q1 stale |
| STATE STREET CORP | 41,492 | $31K | 1.0% | 2025-Q1 stale |
| DRW Securities, LLC trimmed | 10,447 | $30K | 1.0% | 2025-Q4 stale |
| SIMPLEX TRADING, LLC added | 20,422 | $15K | 0.5% | 2025-Q1 stale |
| NATIONAL BANK OF CANADA /FI/ trimmed | 1,538 | $10K | 0.3% | 2025-Q2 stale |
| MayTech Global Investments, LLC | 10,000 | $7K | 0.2% | 2025-Q1 stale |
| CIBC Private Wealth Group LLC added | 1,080 | $3K | 0.1% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 234 | $2K | 0.1% | 2025-Q2 stale |
| Millstone Evans Group, LLC | 800 | $590 | 0.0% | 2025-Q1 stale |
| BANK OF AMERICA CORP /DE/ | 37 | $107 | 0.0% | 2025-Q4 stale |
| WELLS FARGO & COMPANY/MN trimmed | 3 | $31 | 0.0% | 2025-Q3 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.