Tempest Therapeutics, Inc. (TPST) Ownership
TPST ownership summary
as of October 18, 2026- Institutions
- 28.0% of shares outstanding
- Insiders
- 30.07% of shares outstanding
- Shares outstanding
- 16.9M
- Float
- 11.1M shares available to trade
- Short interest
- 7.25% 608K shares short
- Days to cover
- 0.09 short interest up 73.6% vs prior month
- Institutions 27.98%
- Insiders 30.07%
- Other investors 41.95%
TPST top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Sabby Management LLC | 3.03% | 511K | $319,042 | +493,430 (+2,763.4%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 1.38% | 234K | $145,946 | — | June 30, 2026 |
| 3 | Geode Capital Management, LLC | 0.51% | 87K | $54,054 | −365 (−0.4%) | June 30, 2026 |
| 4 | Vanguard Fiduciary Trust Co | 0.41% | 69K | $42,999 | — | June 30, 2026 |
| 5 | BlackRock Inc | 0.23% | 39K | $24,378 | — | June 30, 2026 |
| 6 | Squarepoint Ops LLC | 0.18% | 31K | $19,282 | +30,900 (0.0%) | June 30, 2026 |
| 7 | Northern Trust Corp | 0.12% | 20K | $12,565 | +6,083 (+43.3%) | June 30, 2026 |
| 8 | Citadel Advisors Llc | 0.12% | 20K | $12,368 | +19,820 (0.0%) | June 30, 2026 |
| 9 | UBS Group AG | 0.03% | 5,636 | $3,517 | +1,103 (+24.3%) | June 30, 2026 |
| 10 | Tower Research Capital LLC | 0.02% | 3,922 | $2,447 | +1,132 (+40.6%) | June 30, 2026 |
| 11 | Morgan Stanley - Brokerage Accounts | 0.01% | 2,022 | $1,262 | −36 (−1.7%) | June 30, 2026 |
| 12 | Advisor Group Holdings, Inc. | 0.01% | 1,513 | $944 | −16 (−1.0%) | June 30, 2026 |
| 13 | Federation des caisses Desjardins du Quebec | <0.01% | 292 | $182 | — | June 30, 2026 |
| 14 | JONES FINANCIAL COMPANIES LLLP | <0.01% | 239 | $149 | — | June 30, 2026 |
| 15 | Barclays PLC | <0.01% | 222 | $139 | +222 (0.0%) | June 30, 2026 |
| 16 | SBI Securities Co Ltd | <0.01% | 56 | $35 | — | June 30, 2026 |
| 17 | Royal Bank of Canada | <0.01% | 28 | $17 | +1 (+3.7%) | June 30, 2026 |
| 18 | Parallel Advisors, LLC | <0.01% | 18 | $11 | — | June 30, 2026 |
| 19 | BNP Paribas Arbitrage, SA | 0.00% | 3 | $2 | — | June 30, 2026 |
| 20 | Caitong International Asset Management Co., Limited. | 0.00% | 3 | $2 | +3 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 9 holders added 553K shares and 3 cut 417.
TPST top mutual fund and ETF holders
5 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 0.62% | 105K | $65,485 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.29% | 48K | $30,074 | −259 (−0.5%) | August 31, 2026 |
| 3 | Abante Quant Value FI | 0.25% | 42K | $26,096 | — | August 31, 2026 |
| 4 | Fidelity Series Total Market Index | 0.09% | 16K | $9,782 | — | August 31, 2026 |
| 5 | Fidelity Total Market Index | 0.04% | 7,495 | $4,677 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
TPST insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-24 | Matthew Angel | Buy | $2.16 | 231,482 | $500,001 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
TPST shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns TPST
Institutional investors own 28.0% of Tempest Therapeutics's shares and insiders 30.07%. The largest holder is Sabby Management LLC with 3.03% of the shares (511K), as of June 30, 2026. Among the top 20 institutions, 9 added shares and 3 reduced their stake in the latest filings. Short interest is 7.25% of the float, or 0.09 days of average trading volume. The share count rose 3,332.3% since 2014.
Related: TPST analyst forecast, TPST key metrics. See the TPST stock overview for the latest quote and news.
TPST ownership FAQ
Who owns the most Tempest Therapeutics stock?
The largest shareholders of Tempest Therapeutics are Sabby Management LLC (3.03%), Vanguard Capital Management, LLC (1.38%), Geode Capital Management, LLC (0.51%), Vanguard Fiduciary Trust Co (0.41%), BlackRock Inc (0.23%).
What percentage of Tempest Therapeutics is owned by institutions?
Institutions hold 28.0% of Tempest Therapeutics's shares outstanding; insiders hold 30.07%.
Which funds own Tempest Therapeutics?
The largest fund holders of Tempest Therapeutics are Vanguard MStar Total Stk Mkt Idx Invest (0.62%), Fidelity Extended Market Index (0.29%), Abante Quant Value FI (0.25%), Fidelity Series Total Market Index (0.09%), Fidelity Total Market Index (0.04%).
What is Tempest Therapeutics's short interest?
608K shares of Tempest Therapeutics were sold short, 7.25% of the float; at the average daily volume it would take 0.09 days to cover.
Are insiders buying or selling Tempest Therapeutics?
Of the latest 1 reported insider transactions in Tempest Therapeutics (since March 24, 2026), 1 were purchases and 0 were sales.
How many shares of Tempest Therapeutics are outstanding?
Tempest Therapeutics has 16.9M shares outstanding, of which 11.1M are in the public float.