STTK · Insider trading · 13F holders · Congress trades
Shattuck Labs Inc (STTK)
Who is buying and selling STTK: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 13
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
STTK at a glance
- No open-market insider purchases or sales of STTK were filed in the last 90 days.
- 13 13F filers hold STTK among their 50 largest positions, worth $240.5M combined. The biggest bets by portfolio weight are NEXTBio Capital Management LP (11.9%), Prosight Management, LP (7.1%) and West Tower Group, LLC (4.8%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
- No member of Congress has disclosed a trade in STTK.
STTK insider trading
No open-market insider purchases or sales of STTK were filed in the last 90 days.
Who owns STTK? Hedge funds and superinvestors
13 13F filers hold STTK among their 50 largest positions, worth $240.5M combined. The biggest bets by portfolio weight are NEXTBio Capital Management LP (11.9%), Prosight Management, LP (7.1%) and West Tower Group, LLC (4.8%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Redmile Group, LLCHedge fund | 3.2% | $47.8M | 6,892,033 | +24.4% shares | Q2 2026 |
| Orbimed Advisors LLCHedge fund | 0.8% | $43.8M | 6,306,127 | +0.0% shares | Q2 2026 |
| Prosight Management, LPHedge fund | 7.1% | $41.3M | 5,957,877 | +19.1% shares | Q2 2026 |
| Frazier Life Sciences Management, L.P.Hedge fund | 0.6% | $26.0M | 3,750,000 | New | Q2 2026 |
| NEXTBio Capital Management LPHedge fund | 11.9% | $25.9M | 3,727,348 | +18.3% shares | Q2 2026 |
| Deep Track Capital, LPHedge fund | 0.4% | $25.7M | 3,706,734 | — | Q2 2026 |
| Clark Estates Inc/nyInvestment manager | 2.3% | $9.9M | 1,430,167 | -3.1% shares | Q2 2026 |
| 683 Capital Management, LLCHedge fund | 0.8% | $8.0M | 1,157,216 | — | Q2 2026 |
| Boxer Capital Management, LLCHedge fund | 0.5% | $6.9M | 1,000,000 | — | Q2 2026 |
| S&G FoundationEndowment & foundation | 0.1% | $3.0M | 435,749 | +0.0% shares | Q2 2026 |
| West Tower Group, LLCHedge fund | 4.8% | $1.3M | 191,625 | +0.0% shares | Q3 2026 |
| LBJ Family Wealth Advisors, Ltd.Wealth manager | 0.3% | $560K | 82,177 | +0.0% shares | Q3 2026 |
| Mallini Complete Financial Planning LLCWealth manager | 0.1% | $158K | 23,132 | +2.2% shares | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 3, Q2 2026: 10). Screen STTK in the grand portfolio →
STTK stock trades by members of Congress
No member of Congress has disclosed a trade in STTK.
STTK questions and answers
Are insiders buying STTK stock?
No open-market insider purchases or sales of STTK were filed in the last 90 days.
Which hedge funds own STTK?
13 13F filers hold STTK among their 50 largest positions, worth $240.5M combined. The biggest bets by portfolio weight are NEXTBio Capital Management LP (11.9%), Prosight Management, LP (7.1%) and West Tower Group, LLC (4.8%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
Has Congress traded STTK?
No member of Congress has disclosed a trade in STTK.
Who is the largest holder of STTK?
Among 13F filers, Redmile Group, LLC reports the largest STTK position, $47.8M (6,892,033 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is NEXTBio Capital Management LP's: 11.9% of its portfolio.
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