TEMPEST THERAPEUTICS INC TPST
COM NEW · Common Stock · CUSIP 87978U207
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersBrisbane, CA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 14.3m as of 2026-03-25, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.11.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q1 2025 | 2 |
| Q2 2025 | 18 |
| Q3 2025 | 16 |
| Q4 2025 | 20 |
| Q1 2026 | 21 |
| Q2 2026 | 20 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2025 | 17 | 2 |
| Q3 2025 | 10 | 5 |
| Q4 2025 | 9 | 6 |
| Q1 2026 | 5 | 5 |
| Q2 2026 | 9 | 8 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $0 | $19.5k | — |
| Q4 2025 | $0 | $0 | — |
| Q1 2026 | $0 | $0 | — |
| Q2 2026 | $0 | $0 | — |
Biggest buyers
| SABBY MANAGEMENT, LLC | Added | +493.4k |
| Squarepoint Ops LLC | New | +30.9k |
| CITADEL ADVISORS LLC | New | +19.8k |
| NORTHERN TRUST CORP | Added | +6.1k |
| Tower Research Capital LLC (TRC) | Added | +1.1k |
| UBS Group AG | Added | +1.1k |
| BARCLAYS PLC | New | +222 |
| Caitong International Asset Management Co., Ltd | New | +3 |
| ROYAL BANK OF CANADA | Added | +1 |
Biggest sellers
| FMR LLC | Sold out | -33.2k |
| DIMENSIONAL FUND ADVISORS LP | Sold out | -11.4k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -365 |
| Vanguard Global Advisers, LLC | Sold out | -168 |
| MORGAN STANLEY | Reduced | -36 |
| OSAIC HOLDINGS, INC. | Reduced | -16 |
| CITIGROUP INC | Sold out | -8 |
| JPMORGAN CHASE & CO | Sold out | -5 |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Angel Matthew 13D · may seek influence +1.5 pts · filed 2026-03-25 | 37.4% |
| SABBY MANAGEMENT, LLC 13G · passive investor new · filed 2026-01-21 | 9.9% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 1 | $500.0k | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| SABBY MANAGEMENT, LLC 4.72% of their portfolio | 511.3k $567.5k | Added +493.4k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 233.9k $259.6k | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 86.6k $96.2k | Reduced -365 |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 68.9k $76.5k | Unchanged |
| BlackRock, Inc. 0.00% of their portfolio | 39.1k $43.4k | Unchanged |
| Squarepoint Ops LLC 0.00% of their portfolio | 30.9k $34.3k | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 20.1k $22.4k | Added +6.1k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 19.8k $22.0k | New |
| UBS Group AG 0.00% of their portfolio | 5.6k $6.3k | Added +1.1k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 3.9k $4.4k | Added +1.1k |
| MORGAN STANLEY 0.00% of their portfolio | 2.0k $2.2k | Reduced -36 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 1.5k $1.7k | Reduced -16 |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 292 $324 | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 239 $258 | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 222 $246 | New |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 56 $62 | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 28 $0 | Added +1 |
| Parallel Advisors, LLC 0.00% of their portfolio | 18 $20 | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 3 $3 | Unchanged |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 3 $3 | New |