Adaptive Biotechnologies Corp — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| LO FRANCIS | Chief People Officer | Option Exercise | 2,194 | $8.46 | $18,561 | 319,272 | Dec 22, 2025 |
| LO FRANCIS | Chief People Officer | Option Exercise | 39,849 | $3.99 | $158,998 | 429,868 | Dec 15, 2025 |
| HERSHBERG ROBERT | — | Sale | 22,968 | $16.00 | $367,488 | 46,722 | Dec 10, 2025 |
| BENZENO SHARON | Chief Commercial Ofc Imm Med | Option Exercise | 4,157 | $8.46 | $35,168 | 305,238 | Dec 4, 2025 |
| ROBINS HARLAN S | Chief Scientific Officer | Sale | 10,000 | $16.61 | $166,100 | 1,232,312 | Dec 3, 2025 |
| ROBINS CHAD M | CEO and Chairman | Sale | 35,736 | $19.68 | $703,284 | 2,834,239 | Dec 1, 2025 |
| PISKEL KYLE | Chief Financial Officer | Option Exercise | 3,750 | $7.80 | $29,250 | 285,073 | Nov 28, 2025 |
| BENZENO SHARON | Chief Commercial Ofc Imm Med | Sale | 297,925 | $16.54 | $4,927,680 | 296,791 | Nov 21, 2025 |
| PISKEL KYLE | Chief Financial Officer | Sale | 238 | $14.05 | $3,344 | 269,343 | Nov 17, 2025 |
| ROBINS CHAD M | CEO and Chairman | Sale | 86,161 | $14.73 | $1,269,152 | 2,873,088 | Nov 11, 2025 |
| ROBINS HARLAN S | Chief Scientific Officer | Sale | 10,000 | $14.82 | $148,200 | 1,269,524 | Nov 10, 2025 |
| PISKEL KYLE | Chief Financial Officer | Sale | 1,929 | $8.89 | $17,149 | 269,581 | May 16, 2025 |
| PISKEL KYLE | Chief Financial Officer | Award / Grant | 7,815 | — | — | 279,325 | May 16, 2025 |
| ROBINS HARLAN S | Chief Scientific Officer | Option Exercise | 68,412 | $6.32 | $432,364 | 1,347,936 | May 1, 2025 |
| ROBINS HARLAN S | Chief Scientific Officer | Option Exercise | 1,698 | $6.32 | $10,731 | 1,281,222 | Mar 24, 2025 |
| PISKEL KYLE | Chief Financial Officer | Option Exercise | 2,500 | $6.32 | $15,800 | 271,510 | Mar 14, 2025 |
| GRIFFIN MICHELLE RENEE | — | Sale | 36,291 | $7.19 | $260,932 | 15,394 | Mar 13, 2025 |
| HERSHBERG ROBERT | — | Sale | 53,000 | $7.59 | $402,270 | 69,690 | Mar 12, 2025 |
| NEUPERT PETER M | — | Option Exercise | 50,000 | $4.07 | $203,500 | 234,690 | Mar 10, 2025 |
| PISKEL KYLE | Chief Financial Officer | Award / Grant | 125,000 | — | — | 279,330 | Mar 5, 2025 |
| LO FRANCIS | Chief People Officer | Sale | 7,085 | $6.98 | $49,453 | 346,636 | Mar 4, 2025 |
| BOBULSKY SUSAN | Chief Commercial Officer, MRD | Sale | 26,023 | $6.98 | $181,641 | 347,238 | Mar 4, 2025 |
| BENZENO SHARON | Chief Commercial Ofc Imm Med | Sale | 3,065 | $6.99 | $21,424 | 392,723 | Mar 4, 2025 |
| RUBINSTEIN JULIE | President and COO | Sale | 19,461 | $6.99 | $136,032 | 588,249 | Mar 4, 2025 |
| ROBINS HARLAN S | Chief Scientific Officer | Sale | 40,603 | $6.98 | $283,409 | 1,335,577 | Mar 4, 2025 |
| ROBINS CHAD M | CEO and Chairman | Sale | 102,218 | $7.64 | $780,946 | 2,959,249 | Mar 4, 2025 |
| Pellini Michael J | — | Award / Grant | 15,394 | — | — | 69,690 | Mar 4, 2025 |
| OWEN KATEY EINTERZ | — | Award / Grant | 15,394 | — | — | 72,629 | Mar 4, 2025 |
| NEUPERT PETER M | — | Award / Grant | 15,394 | — | — | 184,690 | Mar 4, 2025 |
| HERSHBERG ROBERT | — | Award / Grant | 15,394 | — | — | 122,690 | Mar 4, 2025 |
| GRIFFIN MICHELLE RENEE | — | Sale | 15,664 | $7.94 | $124,372 | 51,685 | Mar 4, 2025 |
| ROBINS CHAD M | CEO and Chairman | Sale | 186,080 | $8.46 | $1,574,237 | 2,576,701 | Feb 19, 2025 |
| ROBINS CHAD M | CEO and Chairman | Option Exercise | 158,921 | $6.32 | $1,004,381 | 2,735,622 | Feb 13, 2025 |
| PISKEL KYLE | Chief Financial Officer | Sale | 248 | $4.98 | $1,235 | 154,330 | Nov 18, 2024 |
| BOBULSKY SUSAN | Chief Commercial Officer, MRD | Option Exercise | 5,000 | $1.98 | $9,900 | 253,290 | Oct 8, 2024 |
| Taylor Stacy L | SVP and General Counsel | Sale | 26,922 | $4.50 | $121,149 | 139,365 | Aug 22, 2024 |
| PISKEL KYLE | Chief Financial Officer | Award / Grant | 31,260 | — | — | 154,578 | May 15, 2024 |
| NEUPERT PETER M | — | Option Exercise | 15,000 | $0.84 | $12,600 | 169,296 | Mar 12, 2024 |
| LO FRANCIS | Chief People Officer | Award / Grant | 99,976 | — | — | 268,445 | Mar 5, 2024 |
| BENZENO SHARON | Chief Commercial Ofc Imm Med | Award / Grant | 132,979 | — | — | 356,805 | Mar 5, 2024 |
| PETERSON TYCHO | Chief Financial Officer | Award / Grant | 147,790 | — | — | 547,009 | Mar 5, 2024 |
| ROBINS CHAD M | CEO and Chairman | Award / Grant | 354,610 | — | — | 2,625,374 | Mar 5, 2024 |
| BOBULSKY SUSAN | Chief Commercial Officer, MRD | Award / Grant | 132,979 | — | — | 261,281 | Mar 5, 2024 |
| Pellini Michael J | — | Award / Grant | 31,328 | — | — | 54,296 | Mar 4, 2024 |
| OWEN KATEY EINTERZ | — | Award / Grant | 31,328 | — | — | 57,235 | Mar 4, 2024 |
| NEUPERT PETER M | — | Award / Grant | 31,328 | — | — | 154,296 | Mar 4, 2024 |
| HERSHBERG ROBERT | — | Award / Grant | 31,328 | — | — | 107,296 | Mar 4, 2024 |
| GRIFFIN MICHELLE RENEE | — | Award / Grant | 31,328 | — | — | 51,955 | Mar 4, 2024 |
| PISKEL KYLE | Principal Accounting Officer | Sale | 7,727 | $3.43 | $26,504 | 123,318 | Mar 4, 2024 |
| Taylor Stacy L | SVP and General Counsel | Sale | 6,772 | $3.43 | $23,228 | 172,896 | Mar 4, 2024 |