Who owns Tempest Therapeutics (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-Q2 13F filings (latest filed 2026-08-14). 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 2026-Q1 and 2026-Q2: 1 added or opened and 0 trimmed or exited — on balance accumulating.
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 2026-Q1 and 2026-Q2, across 20 tracked filers holding TPST, 9 increased or opened the position and 9 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 2026-Q1 and 2026-Q2 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 adds
- SABBY MANAGEMENT, LLC$538K
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 |
|---|---|---|---|---|
| SABBY MANAGEMENT, LLC added | 511,286 | $568K | 18.7% | 2026-Q2 |
| Versant Venture Management, LLC | 269,772 | $299K | 9.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC | 233,888 | $260K | 8.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 86,625 | $96K | 3.2% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO | 68,908 | $76K | 2.5% | 2026-Q2 |
| Squarepoint Ops LLC new | 30,900 | $34K | 1.1% | 2026-Q2 |
| NORTHERN TRUST CORP added | 20,136 | $22K | 0.7% | 2026-Q2 |
| CITADEL ADVISORS LLC new | 19,820 | $22K | 0.7% | 2026-Q2 |
| UBS Group AG added | 5,636 | $6K | 0.2% | 2026-Q2 |
| Tower Research Capital LLC (TRC) added | 3,922 | $4K | 0.1% | 2026-Q2 |
| MORGAN STANLEY trimmed | 2,022 | $2K | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 1,513 | $2K | 0.1% | 2026-Q2 |
| Federation des caisses Desjardins du Quebec | 292 | $324 | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP | 239 | $258 | 0.0% | 2026-Q2 |
| BARCLAYS PLC new | 222 | $246 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. | 56 | $62 | 0.0% | 2026-Q2 |
| Parallel Advisors, LLC | 18 | $20 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd new | 3 | $3 | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 3 | $3 | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 28 | — | 0.0% | 2026-Q2 |
| BlackRock, Inc. | 39,068 | $64K | 2.1% | 2026-Q1 stale (1 quarter behind) |
| FMR LLC | 33,225 | $54K | 1.8% | 2026-Q1 stale (1 quarter behind) |
| DIMENSIONAL FUND ADVISORS LP | 11,444 | $19K | 0.6% | 2026-Q1 stale (1 quarter behind) |
| Vanguard Global Advisers, LLC new | 168 | $276 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| CITIGROUP INC trimmed | 8 | $13 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| JPMORGAN CHASE & CO trimmed | 5 | $8 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC | 162,560 | $467K | 15.3% | 2025-Q4 stale (2 quarters behind) |
| DRW Securities, LLC trimmed | 10,447 | $30K | 1.0% | 2025-Q4 stale (2 quarters behind) |
| CIBC Private Wealth Group LLC added | 1,080 | $3K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| BANK OF AMERICA CORP /DE/ | 37 | $107 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Belvedere Trading LLC new | 5,325 | $55K | 1.8% | 2025-Q3 stale (3 quarters behind) |
| WELLS FARGO & COMPANY/MN new | 3 | $31 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| TANG CAPITAL MANAGEMENT LLC new | 138,962 | $945K | 31.1% | 2025-Q2 stale (4 quarters behind) |
| NATIONAL BANK OF CANADA /FI/ trimmed | 1,538 | $10K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| RAYMOND JAMES FINANCIAL INC new | 234 | $2K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
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.