172 transactions by 12 insiders, from January 29, 2026 to September 17, 2026.
People inside the company. What they do with their own shares is the reason this data exists.
| Insider | Trades | Planned | Bought | Sold |
|---|---|---|---|---|
| Kevin FeeleyCFO | 54 | — | — | $2.4M |
| Katherine StuelandCEO | 45 | — | — | $8.8M |
| Keith A. MeisterDir | 32 | — | $74.0M | — |
| Bryan DechairoCOO | 15 | 8/15 | — | $851K |
| Casdin Capital, LLCDir | 8 | — | $32.6M | — |
| Thomas FuchsDir | 3 | — | — | — |
| Richard C. Pfenniger Jr.Dir | 3 | — | — | — |
| Eli CasdinDir | 3 | — | — | — |
| Emily M. LeproustDir | 3 | — | — | — |
| Joshua RuchDir | 3 | — | — | — |
| Jason RyanDir | 2 | — | — | — |
| Mark A. GardnerPres | 1 | — | — | — |
172 in total, newest filings first.
| Insider | Date | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| Katherine StuelandCEODERIV | Sep 16 | M | 18,750 | $0.00 | —? |
| Katherine StuelandCEO | Sep 16 | S | 3,039 | $99.00 | $301K |
| Katherine StuelandCEO | Sep 16 | S | 4,141 | $98.27 | $407K |
| Katherine StuelandCEO | Sep 16 | S | 1,525 | $96.90 | $148K |
| Katherine StuelandCEO | Sep 16 | S | 148 | $95.41 | $14K |
| Katherine StuelandCEO | Sep 16 | S | 1,648 | $94.26 | $155K |
| Katherine StuelandCEO | Sep 16 | M | 18,750 | $0.00 | — |
| Kevin FeeleyCFODERIV | Sep 16 | M | 7,197 | $0.00 | —? |
| Kevin FeeleyCFO | Sep 16 | S | 1,079 | $99.00 | $107K |
| Kevin FeeleyCFO | Sep 16 | S | 1,470 | $98.27 | $144K |
| Kevin FeeleyCFO | Sep 16 | S | 541 | $96.90 | $52K |
| Kevin FeeleyCFO | Sep 16 | S | 52 | $95.41 | $5K |
| Kevin FeeleyCFO | Sep 16 | S | 586 | $94.26 | $55K |
| Kevin FeeleyCFO | Sep 16 | M | 7,197 | $0.00 | — |
| Thomas FuchsDirDERIV | Sep 17 | M | 1,146 | $0.00 | —? |
| Thomas FuchsDir | Sep 17 | M | 1,146 | $0.00 | — |
| Kevin FeeleyCFODERIV | Sep 1 | M | 717 | $0.00 | —? |
| Kevin FeeleyCFO | Sep 1 | S | 372 | $83.84 | $31K |
| Kevin FeeleyCFO | Sep 1 | M | 717 | $0.00 | — |
| Mark A. GardnerPresDERIV | Jun 29 | A | 35,441 | $0.00 | —? |
| Emily M. LeproustDirDERIV | Jun 18 | M | 3,576 | $0.00 | —? |
| Emily M. LeproustDirDERIV | Jun 18 | A | 4,248 | $0.00 | —? |
| Emily M. LeproustDir | Jun 18 | M | 3,576 | $0.00 | — |
| Jason RyanDirDERIV | Jun 18 | M | 3,576 | $0.00 | —? |
| Jason RyanDir | Jun 18 | M | 3,576 | $0.00 | — |
| Keith A. MeisterDirDERIV | Jun 18 | M | 3,576 | $0.00 | —? |
| Keith A. MeisterDirDERIV | Jun 18 | A | 4,248 | $0.00 | —? |
| Keith A. MeisterDir | Jun 18 | M | 3,576 | $0.00 | — |
| Richard C. Pfenniger Jr.DirDERIV | Jun 18 | M | 3,576 | $0.00 | —? |
| Richard C. Pfenniger Jr.DirDERIV | Jun 18 | A | 4,248 | $0.00 | —? |
| Richard C. Pfenniger Jr.Dir | Jun 18 | M | 3,576 | $0.00 | — |
| Joshua RuchDirDERIV | Jun 18 | M | 3,576 | $0.00 | —? |
| Joshua RuchDirDERIV | Jun 18 | A | 4,248 | $0.00 | —? |
| Joshua RuchDir | Jun 18 | M | 3,576 | $0.00 | — |
| Thomas FuchsDirDERIV | Jun 18 | A | 4,248 | $0.00 | —? |
| Eli CasdinDirDERIV | Jun 18 | M | 3,576 | $0.00 | —? |
| Eli CasdinDirDERIV | Jun 18 | A | 4,248 | $0.00 | —? |
| Eli CasdinDir | Jun 18 | M | 3,576 | $0.00 | — |
| Katherine StuelandCEODERIV | Jun 16 | M | 18,750 | $0.00 | —? |
| Katherine StuelandCEO | Jun 16 | S | 2,429 | $61.50 | $149K |
| Katherine StuelandCEO | Jun 16 | S | 5,932 | $60.83 | $361K |
| Katherine StuelandCEO | Jun 16 | S | 2,140 | $59.75 | $128K |
| Katherine StuelandCEO | Jun 16 | M | 18,750 | $0.00 | — |
| Kevin FeeleyCFODERIV | Jun 16 | M | 7,197 | $0.00 | —? |
| Kevin FeeleyCFO | Jun 16 | S | 863 | $61.50 | $53K |
| Kevin FeeleyCFO | Jun 16 | S | 2,106 | $60.83 | $128K |
| Kevin FeeleyCFO | Jun 16 | S | 760 | $59.75 | $45K |
| Kevin FeeleyCFO | Jun 16 | M | 7,197 | $0.00 | — |
| Katherine StuelandCEODERIV | Jun 9 | M | 6,546 | $0.00 | —? |
| Katherine StuelandCEO | Jun 9 | S | 3,639 | $53.77 | $196K |
| Katherine StuelandCEO | Jun 9 | M | 6,546 | $0.00 | — |
| Kevin FeeleyCFODERIV | Jun 9 | M | 2,462 | $0.00 | —? |
| Kevin FeeleyCFO | Jun 9 | S | 1,266 | $53.77 | $68K |
| Kevin FeeleyCFO | Jun 9 | M | 2,462 | $0.00 | — |
| Casdin Capital, LLCDirJOINT | Jun 5 | P | 50,000 | $52.86 | $2.6M |
| Casdin Capital, LLCDirJOINT | Jun 4 | P | 150,000 | $56.44 | $8.5M |
| Kevin FeeleyCFODERIV | Jun 1 | M | 717 | $0.00 | —? |
| Kevin FeeleyCFO | Jun 1 | S | 369 | $51.74 | $19K |
| Kevin FeeleyCFO | Jun 1 | M | 717 | $0.00 | — |
| Casdin Capital, LLCDirJOINT | May 20 | P | 140,000 | $43.81 | $6.1M |
| Casdin Capital, LLCDirJOINT | May 19 | P | 185,000 | $42.60 | $7.9M |
| Casdin Capital, LLCDirJOINT | May 18 | P | 175,000 | $42.55 | $7.4M |
| Keith A. MeisterDirJOINT | May 15 | P | 18,865 | $39.83 | $751K |
| Keith A. MeisterDirJOINT | May 15 | P | 27,408 | $38.28 | $1.0M |
| Keith A. MeisterDirJOINT | May 14 | P | 51,893 | $39.92 | $2.1M |
| Keith A. MeisterDirJOINT | May 14 | P | 88,107 | $39.08 | $3.4M |
| Keith A. MeisterDirJOINT | May 13 | P | 70,926 | $39.45 | $2.8M |
| Keith A. MeisterDirJOINT | May 13 | P | 94,074 | $38.82 | $3.7M |
| Keith A. MeisterDirJOINT | May 11 | P | 532 | $40.35 | $21K |
| Keith A. MeisterDirJOINT | May 11 | P | 252,734 | $39.65 | $10.0M |
| Keith A. MeisterDirJOINT | May 11 | P | 246,734 | $38.91 | $9.6M |
| Keith A. MeisterDirJOINT | May 8 | P | 73,104 | $41.15 | $3.0M |
| Keith A. MeisterDirJOINT | May 8 | P | 79,144 | $40.67 | $3.2M |
| Keith A. MeisterDirJOINT | May 8 | P | 3,396 | $38.70 | $131K |
| Keith A. MeisterDirJOINT | May 8 | P | 15,745 | $38.00 | $598K |
| Keith A. MeisterDirJOINT | May 7 | P | 56,630 | $40.46 | $2.3M |
| Keith A. MeisterDirJOINT | May 7 | P | 94,356 | $39.39 | $3.7M |
| Keith A. MeisterDirJOINT | May 7 | P | 116,412 | $38.46 | $4.5M |
| Keith A. MeisterDirJOINT | May 7 | P | 123,393 | $37.60 | $4.6M |
| Keith A. MeisterDirJOINT | May 7 | P | 14,786 | $36.33 | $537K |
| Keith A. MeisterDirJOINT | May 7 | P | 128,181 | $35.46 | $4.5M |
| Casdin Capital, LLCDirDERIVJOINT | May 11 | P | 50,000 | — | — |
| Casdin Capital, LLCDirDERIVJOINT | May 8 | P | 300,000 | — | — |
| Casdin Capital, LLCDirDERIVJOINT | May 7 | P | 500,000 | — | — |
| Katherine StuelandCEODERIV | Apr 29 | M | 3,874 | $0.00 | —? |
| Katherine StuelandCEO | Apr 29 | S | 18 | $64.12 | $1K |
| Katherine StuelandCEO | Apr 29 | S | 2,154 | $65.20 | $140K |
| Katherine StuelandCEO | Apr 29 | M | 3,874 | $0.00 | — |
| Kevin FeeleyCFODERIV | Apr 29 | M | 754 | $0.00 | —? |
| Kevin FeeleyCFO | Apr 29 | S | 392 | $65.19 | $26K |
| Kevin FeeleyCFO | Apr 29 | M | 754 | $0.00 | — |
| Katherine StuelandCEODERIV | Mar 26 | M | 80,000 | $0.00 | —? |
| Katherine StuelandCEO | Mar 26 | S | 9,883 | $65.21 | $645K |
| Katherine StuelandCEO | Mar 26 | S | 5,292 | $64.60 | $342K |
| Katherine StuelandCEO | Mar 26 | S | 13,412 | $63.28 | $849K |
| Katherine StuelandCEO | Mar 26 | S | 5,117 | $62.33 | $319K |
| Katherine StuelandCEO | Mar 26 | S | 13,229 | $61.29 | $811K |
| Katherine StuelandCEO | Mar 26 | M | 80,000 | $0.00 | — |
| Kevin FeeleyCFODERIV | Mar 26 | M | 16,250 | $0.00 | —? |
| Kevin FeeleyCFO | Mar 26 | S | 1,857 | $65.21 | $121K |
| Kevin FeeleyCFO | Mar 26 | S | 995 | $64.60 | $64K |
| Kevin FeeleyCFO | Mar 26 | S | 2,520 | $63.28 | $159K |
| Kevin FeeleyCFO | Mar 26 | S | 961 | $62.33 | $60K |
| Kevin FeeleyCFO | Mar 26 | S | 2,485 | $61.29 | $152K |
| Kevin FeeleyCFO | Mar 26 | M | 16,250 | $0.00 | — |
| Katherine StuelandCEODERIV | Mar 16 | M | 18,750 | $0.00 | —? |
| Katherine StuelandCEODERIV | Mar 15 | M | 11,921 | $0.00 | —? |
| Katherine StuelandCEO | Mar 16 | S | 772 | $77.94 | $60K |
| Katherine StuelandCEO | Mar 16 | S | 9,229 | $77.05 | $711K |
| Katherine StuelandCEO | Mar 16 | S | 7,178 | $76.35 | $548K |
| Katherine StuelandCEO | Mar 16 | M | 18,750 | $0.00 | — |
| Katherine StuelandCEO | Mar 15 | M | 11,921 | $0.00 | — |
| Kevin FeeleyCFODERIV | Mar 16 | M | 7,197 | $0.00 | —? |
| Kevin FeeleyCFODERIV | Mar 15 | M | 3,815 | $0.00 | —? |
| Kevin FeeleyCFO | Mar 16 | S | 257 | $77.94 | $20K |
| Kevin FeeleyCFO | Mar 16 | S | 3,065 | $77.05 | $236K |
| Kevin FeeleyCFO | Mar 16 | S | 2,384 | $76.35 | $182K |
| Kevin FeeleyCFO | Mar 16 | M | 7,197 | $0.00 | — |
| Kevin FeeleyCFO | Mar 15 | M | 3,815 | $0.00 | — |
| Katherine StuelandCEODERIV | Mar 9 | M | 6,546 | $0.00 | —? |
| Katherine StuelandCEO | Mar 9 | S | 3,678 | $86.75 | $319K |
| Katherine StuelandCEO | Mar 9 | M | 6,546 | $0.00 | — |
| Kevin FeeleyCFODERIV | Mar 9 | M | 2,462 | $0.00 | —? |
| Kevin FeeleyCFO | Mar 9 | S | 1,280 | $86.75 | $111K |
| Kevin FeeleyCFO | Mar 9 | M | 2,462 | $0.00 | — |
| Katherine StuelandCEO | Mar 6 | A | 3,404 | $88.11 | $300K |
| Kevin FeeleyCFO | Mar 6 | A | 1,986 | $88.11 | $175K |
| Katherine StuelandCEODERIV | Mar 3 | A | 40,418 | $0.00 | —? |
| Katherine StuelandCEO | Mar 4 | S | 9,133 | $79.25 | $724K |
| Katherine StuelandCEO | Mar 4 | S | 10,465 | $78.61 | $823K |
| Katherine StuelandCEO | Mar 4 | S | 5,861 | $77.63 | $455K |
| Katherine StuelandCEO | Mar 3 | A | 47,684 | $0.00 | — |
| Kevin FeeleyCFODERIV | Mar 3 | A | 10,865 | $0.00 | —? |
| Kevin FeeleyCFO | Mar 4 | S | 2,220 | $79.25 | $176K |
| Kevin FeeleyCFO | Mar 4 | S | 2,543 | $78.61 | $200K |
| Kevin FeeleyCFO | Mar 4 | S | 1,424 | $77.63 | $111K |
| Kevin FeeleyCFO | Mar 3 | A | 15,262 | $0.00 | — |
| Bryan DechairoCOODERIV | Mar 3 | A | 10,430 | $0.00 | —? |
| Keith A. MeisterDirJOINT | Mar 5 | P | 29,236 | $82.06 | $2.4M |
| Keith A. MeisterDirJOINT | Mar 5 | P | 60,892 | $81.37 | $5.0M |
| Keith A. MeisterDirJOINT | Mar 5 | P | 47,623 | $80.55 | $3.8M |
| Keith A. MeisterDirJOINT | Mar 5 | P | 1,971 | $78.91 | $156K |
| Keith A. MeisterDirJOINT | Mar 5 | P | 304 | $77.96 | $24K |
| Keith A. MeisterDirJOINT | Mar 3 | P | 249 | $75.99 | $19K |
| Keith A. MeisterDirJOINT | Mar 3 | P | 921 | $75.66 | $70K |
| Keith A. MeisterDirJOINT | Mar 3 | P | 200 | $72.00 | $14K |
| Keith A. MeisterDirJOINT | Mar 3 | P | 8,439 | $71.48 | $603K |
| Keith A. MeisterDirJOINT | Mar 3 | P | 19,686 | $70.34 | $1.4M |
| Kevin FeeleyCFODERIV | Mar 1 | M | 718 | $0.00 | —? |
| Kevin FeeleyCFO | Mar 2 | S | 287 | $77.52 | $22K |
| Kevin FeeleyCFO | Mar 1 | M | 718 | $0.00 | — |
| Bryan DechairoCOO | Feb 4 | SPLAN | 100 | $91.92 | $9K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 100 | $90.45 | $9K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 328 | $88.66 | $29K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 1,572 | $87.66 | $138K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 623 | $86.35 | $54K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 1,034 | $84.93 | $88K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 1,425 | $83.83 | $119K |
| Bryan DechairoCOO | Feb 4 | SPLAN | 779 | $83.04 | $65K |
| Bryan DechairoCOODERIV | Feb 1 | M | 9,374 | $0.00 | —? |
| Bryan DechairoCOO | Feb 2 | S | 1,166 | $100.31 | $117K |
| Bryan DechairoCOO | Feb 2 | S | 1,662 | $99.40 | $165K |
| Bryan DechairoCOO | Feb 2 | S | 492 | $98.61 | $49K |
| Bryan DechairoCOO | Feb 2 | S | 93 | $96.77 | $9K |
| Bryan DechairoCOO | Feb 1 | M | 9,374 | $0.00 | — |
| Katherine StuelandCEODERIV | Jan 29 | M | 3,874 | $0.00 | —? |
| Katherine StuelandCEO | Jan 29 | S | 1,653 | $94.00 | $155K |
| Katherine StuelandCEO | Jan 29 | M | 3,874 | $0.00 | — |
| Kevin FeeleyCFODERIV | Jan 29 | M | 754 | $0.00 | —? |
| Kevin FeeleyCFO | Jan 29 | S | 2 | $92.06 | $184 |
| Kevin FeeleyCFO | Jan 29 | S | 315 | $94.00 | $30K |
| Kevin FeeleyCFO | Jan 29 | M | 754 | $0.00 | — |