Vault-13

TEMPEST THERAPEUTICS INC TPST

COM NEW · Common Stock · CUSIP 87978U207

20 institutional holders -1 vs Q1 2026
1,024,5851.0m shares reported held*
7.1% of all shares outstanding*
$1.1mreported value*
4 new 5 added 3 reduced 5 sold out net bought ≈ $563.2k (+507.4k shares)

* 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

0102030Q1 25: 2Q2 25: 18Q3 25: 16Q4 25: 20Q1 26: 21Q2 26: 2020Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26
Numbers
QuarterHolders
Q1 20252
Q2 202518
Q3 202516
Q4 202520
Q1 202621
Q2 202620

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q2 25: 17 bought or addedQ2 25: 2 cut or sold outQ2 25Q3 25: 10 bought or addedQ3 25: 5 cut or sold outQ3 25Q4 25: 9 bought or addedQ4 25: 6 cut or sold outQ4 25Q1 26: 5 bought or addedQ1 26: 5 cut or sold outQ1 26Q2 26: 9 bought or addedQ2 26: 8 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q2 2025172
Q3 2025105
Q4 202596
Q1 202655
Q2 202698

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$5k$10k$15k$20kQ3 25 calls: $0Q3 25 puts: $19.5kQ3 25P/C —Q4 25 calls: $0Q4 25 puts: $0Q4 25P/C —Q1 26 calls: $0Q1 26 puts: $0Q1 26P/C —Q2 26 calls: $0Q2 26 puts: $0Q2 26P/C —
Numbers
QuarterCallsPutsP/C
Q3 2025$0$19.5k—
Q4 2025$0$0—
Q1 2026$0$0—
Q2 2026$0$0—

Biggest buyers

SABBY MANAGEMENT, LLC Added +493,430+493.4k
Squarepoint Ops LLC New +30,900+30.9k
CITADEL ADVISORS LLC New +19,820+19.8k
NORTHERN TRUST CORP Added +6,083+6.1k
Tower Research Capital LLC (TRC) Added +1,132+1.1k
UBS Group AG Added +1,103+1.1k
BARCLAYS PLC New +222+222
Caitong International Asset Management Co., Ltd New +3+3
ROYAL BANK OF CANADA Added +1+1

Biggest sellers

FMR LLC Sold out -33,225-33.2k
DIMENSIONAL FUND ADVISORS LP Sold out -11,444-11.4k
GEODE CAPITAL MANAGEMENT, LLC Reduced -365-365
Vanguard Global Advisers, LLC Sold out -168-168
MORGAN STANLEY Reduced -36-36
OSAIC HOLDINGS, INC. Reduced -16-16
CITIGROUP INC Sold out -8-8
JPMORGAN CHASE & CO Sold out -5-5

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.

HolderStakeChangeShares Last filed
Angel Matthew 13D · may seek influence +1.5 pts · filed 2026-03-25 37.4% +1.5 pts 5.5m≈ $6.1m 2026-03-25
SABBY MANAGEMENT, LLC 13G · passive investor new · filed 2026-01-21 9.9% new 492.2k≈ $546.3k 2026-01-21

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)

BuyingSelling
101Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 1 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20250—0——
Q1 20261$500.0k0——
Q2 20260—0——
Q3 20260—0——

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 SABBY MANAGEMENT, LLC 4.72% of their portfolio MIAMI BEACH, FL 511,286511.3k $567.5k $567.5k 4.72% Added +493.4k +493,430
2 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 233,888233.9k $259.6k $259.6k 0.00% Unchanged
3 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 86,62586.6k $96.2k $96.2k 0.00% Reduced -365 -365
4 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 68,90868.9k $76.5k $76.5k 0.00% Unchanged
5 BlackRock, Inc. 0.00% of their portfolio New York, NY 39,06839.1k $43.4k $43.4k 0.00% Unchanged
6 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 30,90030.9k $34.3k $34.3k 0.00% New
7 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 20,13620.1k $22.4k $22.4k 0.00% Added +6.1k +6,083
8 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 19,82019.8k $22.0k $22.0k 0.00% New
9 UBS Group AG 0.00% of their portfolio ZURICH, V8 5,6365.6k $6.3k $6.3k 0.00% Added +1.1k +1,103
10 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 3,9223.9k $4.4k $4.4k 0.00% Added +1.1k +1,132
11 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 2,0222.0k $2.2k $2.2k 0.00% Reduced -36 -36
12 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 1,5131.5k $1.7k $1.7k 0.00% Reduced -16 -16
13 Federation des caisses Desjardins du Quebec 0.00% of their portfolio LEVIS, A8 292292 $324 $324 0.00% Unchanged
14 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 239239 $258 $258 0.00% Unchanged
15 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 222222 $246 $246 0.00% New
16 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 5656 $62 $62 0.00% Unchanged
17 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 2828 $0 $0 0.00% Added +1 +1
18 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 1818 $20 $20 0.00% Unchanged
19 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 33 $3 $3 0.00% Unchanged
20 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 33 $3 $3 0.00% New