Over the trailing 12 months, LYEL insiders bought $37.5 million worth of shares (2.81Mn shares) and sold $608,228 worth (31.27K shares) in open-market trades.
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Venture Fund Xiii, L.P. Arch | TenPercentOwner | 0 | 3,747,790 | 3,747,790 | 34.9% | 05 Nov, 2026 |
| 2 | Venture Partners Ix, Llc Arch | TenPercentOwner | 0 | 3,747,790 | 3,747,790 | 34.9% | 05 Nov, 2026 |
| 3 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | 2,774,980 | 0 | 2,774,980 | 25.9% | 27 Jul, 2026 |
| 4 | Hans Edgar Bishop | Director | 234,281 | 0 | 234,281 | 2.2% | 09 Sep, 2022 |
| 5 | Lynn Seely | President And Ceo | 63,899 | 0 | 63,899 | 0.6% | 25 Aug, 2026 |
| 6 | Richard Klausner | Director | 0 | 42,168 | 42,168 | 0.4% | 18 Mar, 2025 |
| 7 | David Shook | Chief Medical Officer | 20,423 | 0 | 20,423 | 0.2% | 10 Sep, 2026 |
| 8 | Jarrad Mattieu Aguirre | Chief Medical Officer | 19,857 | 0 | 19,857 | 0.2% | 13 Oct, 2026 |
| 9 | Stephen J. Hill | Chief Operating Officer | 16,816 | 0 | 16,816 | 0.2% | 25 Aug, 2026 |
| 10 | Gary K. Lee | Chief Scientific Officer | 16,220 | 0 | 16,220 | 0.2% | 25 Aug, 2026 |
| 11 | Charles W. Newton | Chief Financial Officer | 15,306 | 0 | 15,306 | 0.1% | 22 Aug, 2025 |
| 12 | Veronica Sanchez Bulis | Vp, Corporate Controller | 14,799 | 0 | 14,799 | 0.1% | 11 Aug, 2026 |
| 13 | Sumant Ramachandra | Director | 0 | 10,000 | 10,000 | 0.1% | 25 Mar, 2025 |
| 14 | Matthew Lang | Chief Business Officer | 8,125 | 0 | 8,125 | 0.1% | 26 Feb, 2025 |
| 15 | Otis W Brawley | Director | 1,782 | 0 | 1,782 | 0.0% | 02 Apr, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 04 Nov, 2026 | Venture Fund Xiii, L.P. Arch | TenPercentOwner | Acquired P | 2,321,262 | $10.77 | $25.00Mn | 3,747,790 | Indirect |
| 04 Nov, 2026 | Venture Partners Ix, Llc Arch | TenPercentOwner | Acquired P | 2,321,262 | $10.77 | $25.00Mn | 3,747,790 | Indirect |
| 12 Oct, 2026 | Jarrad Mattieu Aguirre | Chief Medical Officer | Disposed S | 422 | $8.63 | $3.64K | 19,857 | Direct |
| 10 Sep, 2026 | David Shook | Chief Medical Officer | Disposed S | 500 | $12.70 | $6.35K | 20,423 | Direct |
| 10 Sep, 2026 | Jarrad Mattieu Aguirre | Chief Medical Officer | Acquired A | 47,500 | $0.00 | $0 | 47,500 | Direct |
| 21 Aug, 2026 | Lynn Seely | President And Ceo | Disposed S | 9,589 | $15.54 | $149.01K | 63,899 | Direct |
| 21 Aug, 2026 | Gary K. Lee | Chief Scientific Officer | Disposed S | 1,457 | $15.54 | $22.64K | 16,220 | Direct |
| 21 Aug, 2026 | Stephen J. Hill | Chief Operating Officer | Disposed S | 989 | $15.54 | $15.37K | 16,816 | Direct |
| 10 Aug, 2026 | Stephen J. Hill | Chief Operating Officer | Disposed S | 89 | $14.34 | $1.28K | 17,805 | Direct |
| 10 Aug, 2026 | Gary K. Lee | Chief Scientific Officer | Disposed S | 131 | $14.34 | $1.88K | 17,677 | Direct |
| 10 Aug, 2026 | Lynn Seely | President And Ceo | Disposed S | 390 | $14.34 | $5.59K | 73,488 | Direct |
| 10 Aug, 2026 | Veronica Sanchez Bulis | Vp, Corporate Controller | Disposed S | 621 | $14.34 | $8.91K | 14,799 | Direct |
| 27 Jul, 2026 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | Disposed J | 38,500 | $0.00 | $0 | 2,818,980 | Direct |
| 27 Jul, 2026 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | Disposed J | 44,000 | $0.00 | $0 | 2,774,980 | Direct |
| 17 Jul, 2026 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | Disposed S | 10 | $13.70 | $137 | 2,857,480 | Direct |
| 16 Jul, 2026 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | Disposed S | 10 | $13.73 | $137 | 2,857,490 | Direct |
| 29 Jun, 2026 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | Disposed J | 76,000 | $0.00 | $0 | 2,857,500 | Direct |
| 15 Jun, 2026 | Cellular Therapeutics Holdings Ltd Innovative | TenPercentOwner | Disposed J | 66,500 | $0.00 | $0 | 2,933,500 | Direct |
| 11 May, 2026 | Lynn Seely | President And Ceo | Disposed S | 388 | $18.91 | $7.34K | 73,878 | Direct |
| 11 May, 2026 | Gary K. Lee | Chief Scientific Officer | Disposed S | 130 | $18.92 | $2.46K | 17,808 | Direct |