MLYS's three largest insider shareholders as of March 23, 2026 are Brian Taylor Slingsby (Director, 7.91Mn shares), Biocapital Gp, Llc Samsara (TenPercentOwner, 5.67Mn shares), Jon Congleton (Chief Executive Officer, 780.05K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Brian Taylor Slingsby | 0 | 7,910,038 | 20 Feb, 2026 | |
| Biocapital Gp, Llc Samsara | 0 | 5,674,916 | 17 Mar, 2025 | |
| David Malcom Rodman | Chief Medical Officer | 76,140 | 0 | 17 Mar, 2026 |
| Glenn Sblendorio | 6,200 | 0 | 20 Feb, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 17 Mar, 2026 | David Malcom Rodman | Common Stock | A | 417 | $15.44 | 76,557 | D | M |
| 17 Mar, 2026 | David Malcom Rodman | Common Stock | D | 417 | $25.65 | 76,140 | D | S |
| 17 Mar, 2026 | David Malcom Rodman | Stock Option | D | 417 | $0.00 | 5,000 | D | M |
| 12 Mar, 2026 | David Malcom Rodman | Common Stock | A | 6,348 | $1.08 | 88,837 | D | M |
| 12 Mar, 2026 | David Malcom Rodman | Common Stock | D | 6,348 | $27.37 | 82,489 | D | S |
| 13 Mar, 2026 | David Malcom Rodman | Common Stock | A | 3,542 | $10.20 | 86,031 | D | M |
| 13 Mar, 2026 | David Malcom Rodman | Common Stock | A | 4,167 | $14.25 | 90,198 | D | M |
| 13 Mar, 2026 | David Malcom Rodman | Common Stock | D | 10,726 | $25.91 | 79,472 | D | S |
| 13 Mar, 2026 | David Malcom Rodman | Common Stock | D | 3,079 | $27.37 | 76,393 | D | S |
| 13 Mar, 2026 | David Malcom Rodman | Common Stock | D | 253 | $27.82 | 76,140 | D | S |
| 12 Mar, 2026 | David Malcom Rodman | Stock Option | D | 6,348 | $0.00 | 25,395 | D | M |
| 13 Mar, 2026 | David Malcom Rodman | Stock Option | D | 3,542 | $0.00 | 123,959 | D | M |
| 13 Mar, 2026 | David Malcom Rodman | Stock Option | D | 4,167 | $0.00 | 95,834 | D | M |
| 09 Mar, 2026 | David Malcom Rodman | Common Stock | A | 2,171 | $16.00 | 84,660 | D | M |
| 09 Mar, 2026 | David Malcom Rodman | Common Stock | D | 2,171 | $26.84 | 82,489 | D | S |
| 09 Mar, 2026 | David Malcom Rodman | Stock Option | D | 2,171 | $0.00 | 23,876 | D | M |
| 19 Feb, 2026 | Glenn Sblendorio | Common Stock | A | 6,200 | $0.00 | 6,200 | D | A |
| 19 Feb, 2026 | David Malcom Rodman | Common Stock | A | 38,400 | $0.00 | 82,489 | D | A |
| 19 Feb, 2026 | Brian Taylor Slingsby | Common Stock | A | 6,200 | $0.00 | 6,200 | D | A |
| 19 Feb, 2026 | Glenn Sblendorio | Stock Option | A | 8,300 | $0.00 | 8,300 | D | A |