As of March 23, 2026, the three largest insider holders of XNCR are Bassil I Dahiyat (President Ceo, 546.32K shares), John R Desjarlais (Sr. Vice President Cso, 263.83K shares), John J Kuch (Sr. Vice President Cfo, 121.07K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Bassil I Dahiyat | President Ceo | 546,316 | 0 | 09 Mar, 2026 |
| John R Desjarlais | Sr. Vice President Cso | 263,831 | 0 | 09 Mar, 2026 |
| John J Kuch | Sr. Vice President Cfo | 121,070 | 0 | 12 Mar, 2024 |
| Bart Jan Cornelissen | Sr. Vice President Cfo | 79,397 | 0 | 09 Mar, 2026 |
| Celia Eckert | Svp, General Counsel | 76,918 | 0 | 09 Mar, 2026 |
| Allen Yang | Sr. Vice President Cmo | 73,364 | 0 | 13 Mar, 2023 |
| Nancy Valente | Evp, Chief Development Officer | 49,169 | 0 | 06 May, 2025 |
| Alan Bruce Montgomery | 20,611 | 0 | 16 Jun, 2025 | |
| Kurt A Gustafson | 20,183 | 0 | 16 Jun, 2025 | |
| Barbara Klencke | 19,672 | 0 | 16 Jun, 2025 | |
| Ellen Feigal | 19,183 | 0 | 16 Jun, 2025 | |
| Dagmar Rosa-Bjorkeson | 8,490 | 0 | 01 Oct, 2024 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 05 Mar, 2026 | Bassil I Dahiyat | Common Stock | D | 14,870 | $11.25 | 552,922 | D | S |
| 05 Mar, 2026 | John R Desjarlais | Common Stock | D | 4,118 | $11.25 | 266,333 | D | S |
| 05 Mar, 2026 | Bart Jan Cornelissen | Common Stock | D | 2,517 | $11.25 | 79,397 | D | S |
| 05 Mar, 2026 | Celia Eckert | Common Stock | D | 3,244 | $11.25 | 78,685 | D | S |
| 06 Mar, 2026 | John R Desjarlais | Common Stock | D | 2,502 | $11.02 | 263,831 | D | S |
| 06 Mar, 2026 | Bassil I Dahiyat | Common Stock | D | 6,606 | $11.02 | 546,316 | D | S |
| 06 Mar, 2026 | Celia Eckert | Common Stock | D | 1,767 | $11.02 | 76,918 | D | S |
| 02 Mar, 2026 | Celia Eckert | Common Stock | A | 18,680 | $0.00 | 83,421 | D | A |
| 02 Mar, 2026 | Bart Jan Cornelissen | Common Stock | A | 19,458 | $0.00 | 81,914 | D | A |
| 02 Mar, 2026 | Bassil I Dahiyat | Common Stock | A | 97,291 | $0.00 | 574,550 | D | A |
| 02 Mar, 2026 | John R Desjarlais | Common Stock | A | 24,907 | $0.00 | 273,114 | D | A |
| 03 Mar, 2026 | John R Desjarlais | Common Stock | D | 2,663 | $11.90 | 270,451 | D | S |
| 02 Mar, 2026 | Bart Jan Cornelissen | Stock Option (Right to Buy) | A | 116,750 | $0.00 | 116,750 | D | A |
| 03 Mar, 2026 | Bassil I Dahiyat | Common Stock | D | 6,758 | $11.90 | 567,792 | D | S |
| 03 Mar, 2026 | Celia Eckert | Common Stock | D | 1,492 | $11.90 | 81,929 | D | S |
| 02 Mar, 2026 | John R Desjarlais | Stock Option (Right to Buy) | A | 149,440 | $0.00 | 149,440 | D | A |
| 02 Mar, 2026 | Celia Eckert | Stock Option (Right to Buy) | A | 112,080 | $0.00 | 112,080 | D | A |
| 02 Mar, 2026 | Bassil I Dahiyat | Stock Option (Right to Buy) | A | 583,748 | $0.00 | 583,748 | D | A |
| 23 Jan, 2026 | John R Desjarlais | Common Stock | A | 5,322 | $12.51 | 248,207 | D | M |
| 23 Jan, 2026 | John R Desjarlais | Stock Option (Right to Buy) | D | 5,322 | $0.00 | 0 | D | M |