Shattuck Labs (STTK)
Shattuck Labs on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as pharmaceutical preparations.
10.4M
Short interest
settlement 2026-10-15
7.2
Days to cover
+1.2 days vs prior
73.4%
Short share of volume
2026-11-02
243
Fails to deliver
settlement 2026-10-07
Thu 5 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in STTK is 10,440,338 shares, up 3,631,676 shares over the last month. Over the last 48 readings it ranged from 374,045 shares (15 September 2025) to 10,947,042 shares (30 September 2026). The latest reading sits at the top of that range. At the reported average volume of 1.4M shares a day that is 7.2 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 10,440,338 | -4.6% | 1,441,582 | 7.24 |
| 2026-09-30 | 10,947,042 | +60.8% | 1,821,507 | 6.01 |
| 2026-09-15 | 6,808,662 | +22.2% | 812,736 | 8.38 |
| 2026-08-31 | 5,571,195 | -7.2% | 733,945 | 7.59 |
| 2026-08-14 | 6,006,320 | -6.1% | 1,033,403 | 5.81 |
| 2026-07-31 | 6,394,445 | -18.1% | 1,206,788 | 5.30 |
| 2026-07-15 | 7,802,903 | +31.6% | 1,337,070 | 5.84 |
| 2026-06-30 | 5,929,245 | +133.5% | 2,248,620 | 2.64 |
| 2026-06-15 | 2,539,247 | +121.1% | 1,402,935 | 1.81 |
| 2026-05-29 | 1,148,683 | -13.0% | 549,104 | 2.09 |
| 2026-05-15 | 1,319,679 | -6.7% | 612,754 | 2.15 |
| 2026-04-30 | 1,415,066 | +6.0% | 431,819 | 3.28 |
| 2026-04-15 | 1,335,620 | -8.9% | 461,307 | 2.90 |
| 2026-03-31 | 1,466,321 | -7.2% | 627,566 | 2.34 |
| 2026-03-13 | 1,579,942 | -1.6% | 929,738 | 1.70 |
| 2026-02-27 | 1,604,787 | -16.5% | 294,628 | 5.45 |
| 2026-02-13 | 1,921,827 | -14.7% | 334,601 | 5.74 |
| 2026-01-30 | 2,251,778 | +2.4% | 992,102 | 2.27 |
| 2026-01-15 | 2,198,677 | +113.8% | 791,757 | 2.78 |
| 2025-12-31 | 1,028,366 | +38.5% | 452,295 | 2.27 |
| 2025-12-15 | 742,537 | +10.9% | 519,850 | 1.43 |
| 2025-11-28 | 669,432 | -25.0% | 116,569 | 5.74 |
| 2025-11-14 | 892,647 | -1.7% | 122,335 | 7.30 |
| 2025-10-31 | 907,696 | -4.6% | 185,444 | 4.89 |
| 2025-10-15 | 951,624 | +128.2% | 492,916 | 1.93 |
| 2025-09-30 | 417,075 | +11.5% | 333,059 | 1.25 |
| 2025-09-15 | 374,045 | -61.0% | 2,584,595 | 1.00 |
| 2025-08-29 | 959,265 | -24.8% | 502,105 | 1.91 |
| 2025-08-15 | 1,275,855 | +195.5% | 9,264,289 | 1.00 |
| 2025-07-31 | 431,826 | -14.1% | 154,204 | 2.80 |
| 2025-07-15 | 502,888 | -33.4% | 284,710 | 1.77 |
| 2025-06-30 | 754,834 | -51.9% | 664,898 | 1.14 |
| 2025-06-13 | 1,569,000 | -7.5% | 106,752 | 14.70 |
| 2025-05-30 | 1,695,633 | -0.6% | 129,984 | 13.04 |
| 2025-05-15 | 1,705,313 | +5.0% | 79,094 | 21.56 |
| 2025-04-30 | 1,623,744 | -3.7% | 132,923 | 12.22 |
| 2025-04-15 | 1,685,625 | +1.3% | 467,891 | 3.60 |
| 2025-03-31 | 1,663,778 | -0.7% | 92,620 | 17.96 |
| 2025-03-14 | 1,675,741 | -0.7% | 120,322 | 13.93 |
| 2025-02-28 | 1,687,577 | -11.9% | 358,805 | 4.70 |
| 2025-02-14 | 1,916,536 | -0.9% | 103,988 | 18.43 |
| 2025-01-31 | 1,933,707 | -12.0% | 125,656 | 15.39 |
| 2025-01-15 | 2,196,863 | +7.7% | 122,889 | 17.88 |
| 2024-12-31 | 2,039,133 | +4.2% | 226,861 | 8.99 |
| 2024-12-13 | 1,957,498 | -6.7% | 440,104 | 4.45 |
| 2024-11-29 | 2,098,173 | -1.2% | 247,797 | 8.47 |
| 2024-11-15 | 2,122,726 | -3.2% | 354,311 | 5.99 |
| 2024-10-31 | 2,192,022 | +0.7% | 352,554 | 6.22 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of STTK volume is 73.4%, up 15.4 points over the last five sessions. Over the last 30 readings it ranged from 32.1% (14 October 2026) to 84.7% (23 September 2026). The latest reading is 11.4 points above the 30-session average of 62.0%, on 215K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 158K | 215K | 73.4% | 840 |
| 2026-10-30 | 195K | 354K | 55.0% | 0 |
| 2026-10-29 | 84K | 161K | 52.4% | 0 |
| 2026-10-28 | 125K | 259K | 48.4% | 0 |
| 2026-10-27 | 147K | 236K | 62.4% | 0 |
| 2026-10-26 | 144K | 247K | 58.0% | 0 |
| 2026-10-23 | 169K | 243K | 69.8% | 0 |
| 2026-10-22 | 261K | 558K | 46.7% | 0 |
| 2026-10-21 | 274K | 487K | 56.3% | 0 |
| 2026-10-20 | 333K | 746K | 44.6% | 0 |
| 2026-10-19 | 157K | 217K | 72.4% | 0 |
| 2026-10-16 | 167K | 210K | 79.5% | 0 |
| 2026-10-15 | 258K | 364K | 70.8% | 0 |
| 2026-10-14 | 180K | 563K | 32.1% | 2,466 |
| 2026-10-13 | 510K | 935K | 54.6% | 173 |
| 2026-10-12 | 285K | 385K | 74.1% | 56 |
| 2026-10-09 | 267K | 402K | 66.4% | 0 |
| 2026-10-08 | 368K | 840K | 43.8% | 3,342 |
| 2026-10-07 | 292K | 471K | 61.9% | 11,043 |
| 2026-10-06 | 540K | 886K | 61.0% | 0 |
| 2026-10-05 | 279K | 388K | 71.9% | 0 |
| 2026-10-02 | 667K | 837K | 79.7% | 52 |
| 2026-10-01 | 476K | 953K | 50.0% | 1 |
| 2026-09-30 | 620K | 1.5M | 41.5% | 100 |
| 2026-09-29 | 280K | 353K | 79.5% | 0 |
| 2026-09-28 | 218K | 431K | 50.6% | 25 |
| 2026-09-25 | 183K | 275K | 66.6% | 0 |
| 2026-09-24 | 322K | 459K | 70.1% | 57 |
| 2026-09-23 | 483K | 571K | 84.7% | 8,000 |
| 2026-09-22 | 322K | 394K | 81.8% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 7 October 2026, the fails-to-deliver balance in STTK is 243 shares, down 3,862 shares over the last settlement date. Over the last 30 readings it ranged from 6 shares (16 December 2025) to 159,756 shares (22 May 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-07 | 243 | $5.86 | $1K |
| 2026-10-05 | 4,105 | $6.73 | $28K |
| 2026-10-01 | 1,176 | $6.82 | $8K |
| 2026-09-24 | 1,724 | $6.36 | $11K |
| 2026-09-21 | 11,337 | $6.01 | $68K |
| 2026-09-08 | 16,501 | $6.79 | $112K |
| 2026-08-25 | 3,001 | $7.90 | $24K |
| 2026-08-04 | 72 | $7.29 | $525 |
| 2026-08-03 | 289 | $7.07 | $2K |
| 2026-07-31 | 945 | $7.19 | $7K |
| 2026-07-29 | 3,185 | $6.82 | $22K |
| 2026-07-17 | 45,014 | $7.07 | $318K |
| 2026-07-16 | 51 | $6.77 | $345 |
| 2026-07-14 | 2,026 | $6.43 | $13K |
| 2026-07-13 | 1,589 | $6.64 | $11K |
| 2026-07-10 | 1,644 | $7.03 | $12K |
| 2026-07-09 | 2,067 | $6.88 | $14K |
| 2026-07-08 | 2,864 | $7.26 | $21K |
| 2026-07-07 | 1,685 | $7.24 | $12K |
| 2026-07-06 | 1,854 | $7.05 | $13K |
| 2026-07-02 | 356 | $6.51 | $2K |
| 2026-06-29 | 151,750 | $6.44 | $977K |
| 2026-06-26 | 381 | $5.91 | $2K |
| 2026-06-25 | 3,910 | $6.01 | $23K |
| 2026-06-24 | 2,208 | $5.39 | $12K |
| 2026-06-11 | 20,079 | $4.13 | $83K |
| 2026-05-22 | 159,756 | $6.09 | $973K |
| 2026-02-02 | 34 | $3.87 | $132 |
| 2025-12-16 | 6 | $3.06 | $18 |
| 2025-12-12 | 228 | $3.23 | $736 |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for STTK in the last 90 days. The most recent filings are listed below. Latest filing: Shukla Abhinav A. (Chief Technical Officer) on 2026-07-06.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-07-06 | Shukla Abhinav A. | Chief Technical Officer | Exercise or conversion | 12K | $3.57 | $43K | 99K |
| 2026-07-02 | Shukla Abhinav A. | Chief Technical Officer | Sell | 410 | $7.01 | $3K | 86K |
| 2026-07-02 | Shukla Abhinav A. | Chief Technical Officer | Exercise or conversion | 410 | $3.57 | $1K | 87K |
| 2026-07-01 | Shukla Abhinav A. | Chief Technical Officer | Sell | 100 | $7.07 | $707 | 86K |
| 2026-07-01 | Shukla Abhinav A. | Chief Technical Officer | Exercise or conversion | 100 | $3.57 | $357 | 86K |
| 2026-06-30 | Shukla Abhinav A. | Chief Technical Officer | Sell | 23K | $7.08 | $165K | 86K |
| 2026-06-30 | Shukla Abhinav A. | Chief Technical Officer | Exercise or conversion | 23K | $3.57 | $83K | 110K |
| 2026-06-30 | Pandite Arundathy N. | Chief Medical Officer | Sell | 30K | $7.01 | $210K | 136K |
| 2026-06-09 | SIEGALL CLAY B | Director | Buy | 63K | $4.00 | $250K | 319K |
| 2026-05-22 | SIEGALL CLAY B | Director | Grant | 128K | $1.08 | $139K | 256K |
| 2026-05-21 | Shukla Abhinav A. | Chief Technical Officer | Grant | 5K | $1.08 | $6K | 86K |
| 2026-05-15 | Stout Stephen | See Remarks | Grant | 13K | $1.08 | $14K | 93K |
| 2026-05-12 | Schreiber Taylor | Chief Executive Officer | Grant | 26K | $1.08 | $28K | 122K |
| 2026-05-12 | Shukla Abhinav A. | Chief Technical Officer | Sell | 2K | $7.01 | $14K | 81K |
| 2026-05-12 | Shukla Abhinav A. | Chief Technical Officer | Exercise or conversion | 2K | $3.57 | $7K | 83K |
| 2026-05-12 | Pandite Arundathy N. | Chief Medical Officer | Sell | 30K | $6.61 | $198K | 166K |
| 2026-05-12 | Neill Andrew R | Chief Financial Officer | Grant | 64K | $1.08 | $69K | 292K |
| 2026-05-10 | Stout Stephen | See Remarks | Tax withholding | 968 | $6.85 | $7K | 81K |
| 2026-01-25 | Stout Stephen | See Remarks | Tax withholding | 593 | $4.15 | $2K | 82K |
| 2026-01-25 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 3K | $4.15 | $13K | 196K |
| 2026-01-25 | Neill Andrew R | Chief Financial Officer | Tax withholding | 3K | $4.15 | $11K | 228K |
| 2026-01-25 | DeYoung Casi | Chief Business Officer | Tax withholding | 2K | $4.15 | $9K | 73K |
| 2026-01-10 | Stout Stephen | See Remarks | Tax withholding | 4K | $4.75 | $20K | 82K |
| 2026-01-10 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 7K | $4.75 | $33K | 199K |
| 2026-01-10 | Neill Andrew R | Chief Financial Officer | Tax withholding | 7K | $4.75 | $32K | 231K |
| 2026-01-10 | DeYoung Casi | Chief Business Officer | Tax withholding | 6K | $4.75 | $27K | 76K |
| 2025-08-25 | OrbiMed Capital GP IX LLC | Director | Buy | 1.1M | $0.87 | $914K | 1.1M |
| 2025-08-25 | OrbiMed Capital GP IX LLC | Director | Buy | 5.3M | $0.87 | $4.6M | 5.3M |
| 2025-08-25 | Stout Stephen | See Remarks | Grant | 13K | $0.87 | $11K | 86K |
| 2025-08-25 | Shukla Abhinav A. | Chief Technical Officer | Grant | 5K | $0.87 | $4K | 81K |
| 2025-08-25 | Schreiber Taylor | Chief Executive Officer | Grant | 26K | $0.87 | $22K | 97K |
| 2025-08-25 | SIEGALL CLAY B | Director | Grant | 128K | $0.87 | $111K | 128K |
| 2025-08-25 | Neill Andrew R | Chief Financial Officer | Grant | 64K | $0.87 | $56K | 237K |
| 2025-08-25 | ORBIMED ADVISORS LLC | Director | Buy | 1.1M | $0.87 | $912K | 1.1M |
| 2025-08-25 | ORBIMED ADVISORS LLC | Director | Buy | 5.3M | $0.87 | $4.6M | 5.3M |
| 2025-08-25 | Ashiya Mona | Director | Buy | 1.1M | $0.87 | $912K | 1.1M |
| 2025-08-25 | Ashiya Mona | Director | Buy | 5.3M | $0.87 | $4.6M | 5.3M |
| 2025-01-25 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 3K | $1.16 | $4K | 206K |
| 2025-01-25 | DeYoung Casi | Chief Business Officer | Tax withholding | 2K | $1.16 | $3K | 81K |
| 2025-01-25 | Shukla Abhinav A. | Chief Technical Officer | Tax withholding | 2K | $1.16 | $3K | 74K |
| 2025-01-10 | Shukla Abhinav A. | Chief Technical Officer | Tax withholding | 5K | $1.19 | $6K | 75K |
| 2025-01-10 | DeYoung Casi | Chief Business Officer | Tax withholding | 6K | $1.19 | $7K | 84K |
| 2025-01-10 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 7K | $1.19 | $8K | 209K |
| 2024-12-04 | Green Jeremy | Director,TenPercentOwner | Sell | 133K | $1.25 | $167K | 5.4M |
| 2024-12-04 | Green Jeremy | Director,TenPercentOwner | Other transaction | 1.0M | $1.25 | $1.3M | 4.5M |
| 2024-12-04 | Green Jeremy | Director,TenPercentOwner | Buy | 133K | $1.25 | $167K | 5.5M |
| 2024-10-07 | Schreiber Taylor | Chief Executive Officer | Buy | 37K | $1.21 | $44K | 71K |
| 2024-06-28 | Brous Tyler | Director | Buy | 3K | $3.90 | $12K | 238K |
| 2024-06-27 | Brous Tyler | Director | Buy | 5K | $3.89 | $21K | 235K |
| 2024-06-26 | Schreiber Taylor | Chief Executive Officer | Buy | 14K | $3.47 | $50K | 35K |
| 2024-06-04 | Schreiber Taylor | Chief Executive Officer | Exercise or conversion | 3K | $3.57 | $11K | 20K |
| 2024-05-10 | Stout Stephen | See Remarks | Tax withholding | 967 | $10.42 | $10K | 73K |
| 2024-03-28 | Redmile Group, LLC | Director,TenPercentOwner | Other transaction | 4K | $0.00 | $0 | 5.6M |
| 2024-03-06 | Stout Stephen | See Remarks | Exercise or conversion | 6K | $3.57 | $23K | 86K |
| 2024-03-06 | Stout Stephen | See Remarks | Sell | 6K | $10.53 | $68K | 79K |
| 2024-03-06 | Stout Stephen | See Remarks | Sell | 5K | $10.53 | $52K | 74K |
| 2024-03-06 | Stout Stephen | See Remarks | Sell | 5K | $10.53 | $49K | 79K |
| 2024-03-06 | Stout Stephen | See Remarks | Exercise or conversion | 5K | $3.51 | $16K | 84K |
| 2024-01-30 | DeYoung Casi | Chief Business Officer | Tax withholding | 2K | $9.99 | $20K | 89K |
| 2024-01-30 | Shukla Abhinav A. | Chief Technical Officer | Tax withholding | 2K | $9.99 | $23K | 79K |
| 2024-01-30 | Stout Stephen | See Remarks | Tax withholding | 593 | $9.99 | $6K | 79K |
| 2024-01-30 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 3K | $9.99 | $29K | 216K |
| 2024-01-10 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 3K | $10.09 | $30K | 219K |
| 2024-01-10 | Pandite Arundathy N. | Chief Medical Officer | Grant | 46K | $0.00 | $0 | 222K |
| 2024-01-10 | Neill Andrew R | Chief Financial Officer | Sell | 25K | $10.00 | $250K | 173K |
| 2024-01-10 | Neill Andrew R | Chief Financial Officer | Tax withholding | 2K | $10.09 | $25K | 198K |
| 2024-01-10 | Neill Andrew R | Chief Financial Officer | Grant | 57K | $0.00 | $0 | 201K |
| 2024-01-10 | DeYoung Casi | Chief Business Officer | Grant | 46K | $0.00 | $0 | 93K |
| 2024-01-10 | DeYoung Casi | Chief Business Officer | Tax withholding | 2K | $10.09 | $16K | 91K |
| 2024-01-10 | Stout Stephen | See Remarks | Grant | 49K | $0.00 | $0 | 80K |
| 2024-01-10 | Shukla Abhinav A. | Chief Technical Officer | Grant | 33K | $0.00 | $0 | 82K |
| 2023-05-10 | Stout Stephen | See Remarks | Grant | 16K | $0.00 | $0 | 31K |
| 2023-01-25 | DeYoung Casi | Chief Business Officer | Grant | 27K | $0.00 | $0 | 47K |
| 2023-01-25 | Pandite Arundathy N. | Chief Medical Officer | Grant | 38K | $0.00 | $0 | 176K |
| 2023-01-25 | Shukla Abhinav A. | Chief Technical Officer | Grant | 26K | $0.00 | $0 | 47K |
| 2023-01-25 | Thomson Erin Ator | General Counsel | Grant | 24K | $0.00 | $0 | 103K |
| 2023-01-25 | Neill Andrew R | Chief Financial Officer | Grant | 35K | $0.00 | $0 | 144K |
| 2023-01-10 | Shukla Abhinav A. | Chief Technical Officer | Tax withholding | 2K | $3.03 | $6K | 21K |
| 2023-01-10 | Pandite Arundathy N. | Chief Medical Officer | Tax withholding | 3K | $3.03 | $9K | 138K |
| 2023-01-10 | DeYoung Casi | Chief Business Officer | Tax withholding | 2K | $3.03 | $5K | 20K |
| 2022-04-26 | Golumbeski George | Director | Buy | 28K | $3.63 | $103K | 55K |
| 2022-04-22 | Golumbeski George | Director | Buy | 234 | $3.67 | $859 | 26K |
| 2022-04-21 | Golumbeski George | Director | Buy | 26K | $3.69 | $96K | 26K |
| 2022-01-28 | Schreiber Taylor | Chief Executive Officer | Exercise or conversion | 4K | $4.67 | $18K | 17K |
| 2022-01-19 | Brous Tyler | Director | Buy | 3K | $6.87 | $21K | 230K |
| 2022-01-18 | Brous Tyler | Director | Buy | 3K | $7.01 | $18K | 227K |
| 2022-01-14 | Brous Tyler | Director | Buy | 3K | $7.16 | $18K | 224K |
| 2022-01-12 | Thomson Erin Ator | General Counsel | Exercise or conversion | 10K | $2.95 | $30K | 79K |
| 2022-01-10 | Thomson Erin Ator | General Counsel | Grant | 23K | $0.00 | $0 | 69K |
| 2022-01-10 | Neill Andrew R | Chief Financial Officer | Grant | 33K | $0.00 | $0 | 109K |
| 2022-01-10 | Pandite Arundathy N. | Chief Medical Officer | Grant | 35K | $0.00 | $0 | 141K |
| 2022-01-10 | DeYoung Casi | Chief Business Officer | Grant | 21K | $0.00 | $0 | 21K |
| 2021-11-11 | Neill Andrew R | Chief Financial Officer | Exercise or conversion | 20K | $2.95 | $59K | 76K |
| 2021-11-10 | Schreiber Taylor | Chief Executive Officer | Exercise or conversion | 4K | $4.67 | $18K | 13K |
| 2021-10-19 | Thomson Erin Ator | General Counsel | Sell | 33K | $19.50 | $644K | 46K |
| 2021-08-10 | Schreiber Taylor | Chief Executive Officer | Exercise or conversion | 4K | $4.67 | $18K | 9K |
| 2021-08-10 | Pandite Arundathy N. | Chief Medical Officer | Exercise or conversion | 4K | $0.01 | $43 | 106K |
| 2021-08-10 | Neill Andrew R | Chief Financial Officer | Exercise or conversion | 2K | $0.01 | $22 | 56K |
| 2021-07-15 | Hornblower Josiah | Director | Sell | 34 | $22.74 | $773 | 3.0M |
| 2021-07-15 | Thomson Erin Ator | General Counsel | Sell | 2K | $22.18 | $44K | 79K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON5 Form 144 notices on file for STTK worth $604K at the prices reported; 0 in the last 90 days worth $0. Latest: Shukla Abhinav A. filed on 2026-07-02 to sell 410 shares ($3K) from 2026-07-02.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-07-02 | Shukla Abhinav A.Officer | 410 | $3K | 0.001% | 2026-07-02 | Fidelity Brokerage Services LLC |
| 2026-07-01 | Shukla Abhinav A.Officer | 100 | $707 | 0.000% | 2026-07-01 | Fidelity Brokerage Services LLC |
| 2026-06-30 | Shukla Abhinav A.Officer | 23K | $165K | 0.030% | 2026-06-30 | Fidelity Brokerage Services LLC |
| 2026-05-12 | Shukla Abhinav A.Officer | 2K | $14K | 0.003% | 2026-05-12 | Fidelity Brokerage Services LLC |
| 2026-05-12 | ARUNTHATHY PANDITEOfficer | 60K | $421K | 0.078% | 2026-05-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON13 holders report 5% or more of STTK in their latest filing, 5 on Schedule 13D (active intent). The largest reported stake is T. Rowe Price Investment Management, Inc. at 15.3% of the class (13,432,540 shares), filed 2026-08-14 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-27 | 13G | BlackRock, Inc.parent holding company | 5.3M | 5.3% | 2026-09-30 |
| 2026-08-14 | 13G/Ano. 2 | T. Rowe Price Investment Management, Inc.investment adviser | 13.4M | 15.3% | 2026-06-30 |
| 2026-07-17 | 13D/Ano. 6 | Redmile Group, LLCinvestment adviser, other entity | 10.0M | 9.9% | 2026-07-15 |
| 2026-07-17 | 13D/Ano. 6 | Jeremy C. Greenindividual, parent holding company | 10.0M | 9.9% | 2026-07-15 |
| 2026-07-17 | 13D/Ano. 6 | Redmile Biopharma Investments II, L.P.partnership | 8.1M | 8.1% | 2026-07-15 |
| 2026-06-17 | 13G | Deep Track Capital, LPinvestment adviser, other entity | 5.0M | 5.2% | 2026-06-10 |
| 2026-06-17 | 13G | Deep Track Biotechnology Master Fund, Ltd.corporation | 5.0M | 5.2% | 2026-06-10 |
| 2026-06-17 | 13G | David Kroinparent holding company, individual | 5.0M | 5.2% | 2026-06-10 |
| 2026-06-15 | 13D/Ano. 1 | ORBIMED ADVISORS LLCinvestment adviser | 9.0M | 10.0% | 2026-06-11 |
| 2026-06-15 | 13D/Ano. 1 | OrbiMed Capital GP IX LLCother entity | 7.5M | 8.3% | 2026-06-11 |
| 2026-06-15 | 13D/Ano. 1 | OrbiMed Genesis GP LLCother entity | 1.5M | 1.7% | 2026-06-11 |
| 2025-11-13 | 13G/Ano. 3 | W. Lawrence Hawkinsparent holding company, individual | 6.5M | 9.9% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 3 | Prosight Management, LPinvestment adviser | 6.5M | 9.9% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 3 | Prosight Partners, LLCother entity | 6.5M | 9.9% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 3 | Prosight Plus Fund, LPpartnership | 3.1M | 4.9% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 3 | Prosight Fund, LPpartnership | 600K | 0.9% | 2025-09-30 |
13F holders
Tracked managers holding STTK at their latest 13F. JSON4 of the 30 tracked managers held STTK at their latest 13F, $15.9M in total at quarter-end prices. Point72 Asset Management is the largest at $8.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Point72 Asset Management | 2026-06-30 | 1.2M | $8.1M | 0.01% | +140K |
| Renaissance Technologies | 2026-06-30 | 744K | $5.2M | 0.01% | +139K |
| Millennium Management | 2026-06-30 | 194K | $1.3M | 0.00% | -570K |
| Two Sigma Investments | 2026-06-30 | 186K | $1.3M | 0.00% | -130K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Shattuck Labs in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Shattuck Labs (STTK), SEC CIK 1680367, listed on Nasdaq, classified by the SEC as pharmaceutical preparations. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-07.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-07-02.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-27.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-11.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-07-06.JSON and CSV
- Company record
- EDGAR filing index for CIK 1680367Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of STTK is sold short?
10,440,338 shares were held short at the 2026-10-15 settlement, 7.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is STTK's daily short volume?
On 2026-11-02, 157,942 of the 215,258 STTK shares reported to FINRA were sold short, 73.4% of the day's reported volume. Short volume is a flow for one day, not a position.
Does STTK have fails to deliver?
The SEC's latest file shows 243 STTK shares failed to deliver at settlement 2026-10-07. Fails are reported per settlement date and published twice a month with a lag.
Are STTK insiders buying or selling?
No open-market insider trades were reported for STTK in the last 90 days. The most recent filings are listed below. Latest filing: Shukla Abhinav A. (Chief Technical Officer) on 2026-07-06.
Have STTK insiders filed to sell?
5 Form 144 notices on file for STTK worth $604K at the prices reported; 0 in the last 90 days worth $0. Latest: Shukla Abhinav A. filed on 2026-07-02 to sell 410 shares ($3K) from 2026-07-02.
Who owns 5% or more of STTK?
13 holders report 5% or more of STTK in their latest filing, 5 on Schedule 13D (active intent). The largest reported stake is T. Rowe Price Investment Management, Inc. at 15.3% of the class (13,432,540 shares), filed 2026-08-14 for an event on 2026-06-30.
Which tracked 13F managers own STTK?
4 of the 30 tracked 13F managers held STTK shares at their latest filing, $15.9M in all. The largest: Steve Cohen's Point72 Asset Management (1.2M shares, $8.1M), Renaissance Technologies (744K shares, $5.2M), Izzy Englander's Millennium Management (194K shares, $1.3M), Two Sigma Investments (186K shares, $1.3M).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.