XERS's three largest insider shareholders as of April 17, 2026 are Paul R Edick (Director, 3.79Mn shares), John Patrick Jr Shannon (Director, 2.94Mn shares), Kevin Mcculloch (Officer, 1.78Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Paul R Edick | - | 3,788,064 | 0 | 31 Jan, 2024 |
| John Patrick Jr Shannon | - | 2,935,578 | 0 | 02 Feb, 2026 |
| Kevin Mcculloch | - | 1,777,725 | 0 | 16 Mar, 2026 |
| Steven Pieper | - | 1,408,940 | 0 | 05 Mar, 2026 |
| Beth Hecht | - | 1,209,840 | 0 | 03 Apr, 2026 |
| Steven Prestrelski | Chief Scientific Officer | 719,780 | 0 | 01 Feb, 2023 |
| John Johnson | - | 698,083 | 0 | 19 Dec, 2025 |
| Anh Tu Nguyen | - | 395,023 | 0 | 25 Feb, 2026 |
| Kenneth Erland Johnson | - | 320,446 | 0 | 03 Feb, 2025 |
| Jeffrey W Sherman | - | 219,188 | 0 | 29 Aug, 2025 |
| Garheng Kong | - | 214,144 | 0 | 04 Jun, 2025 |
| Barbara-Jean Anne Bormann-Kennedy | - | 142,500 | 0 | 15 Dec, 2025 |
| Marla Persky | - | 142,000 | 0 | 12 Sep, 2025 |
| Ricki Louise Fairley | - | 135,000 | 0 | 05 Jun, 2024 |
| Dawn Halkuff | - | 115,000 | 0 | 13 Aug, 2025 |
| John P. Schmid | - | 113,159 | 0 | 05 Jun, 2024 |
| James Aloysius Brady | - | 89,166 | 0 | 01 Apr, 2026 |
| Paul R Edick | - | 0 | 33,430 | 16 Nov, 2021 |
| John P. Schmid | - | 0 | 25,200 | 13 Aug, 2024 |
| Paul R Edick | - | 0 | 13,430 | 05 Oct, 2021 |
| Marla Persky | - | 0 | 6,370 | 15 Nov, 2023 |
| Dawn Halkuff | - | 0 | 5,410 | 21 Nov, 2023 |
| Jeffrey W Sherman | - | 0 | 5,400 | 29 Nov, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Apr, 2026 | Beth Hecht | Common Stock | D | 16,667 | $5.99 | 1,209,840 | D | S |
| 30 Mar, 2026 | James Aloysius Brady | Common Stock | D | 10,834 | $5.54 | 89,166 | D | S |
| 12 Mar, 2026 | Kevin Mcculloch | Common Stock | A | 48,894 | $4.09 | 1,777,721 | D | M |
| 12 Mar, 2026 | Kevin Mcculloch | Common Stock | A | 4 | $3.94 | 1,777,725 | D | M |
| 12 Mar, 2026 | Kevin Mcculloch | Stock Option (Right to Buy) | D | 48,894 | $4.09 | 43,773 | D | M |
| 12 Mar, 2026 | Kevin Mcculloch | Stock Option (Right to Buy) | D | 4 | $3.94 | 79,996 | D | M |
| 05 Mar, 2026 | Steven Pieper | Common Stock | A | 27,891 | $4.09 | 1,394,904 | D | M |
| 05 Mar, 2026 | Steven Pieper | Common Stock | A | 14,036 | $5.93 | 1,408,940 | D | M |
| 05 Mar, 2026 | Steven Pieper | Stock Option (Right to Buy) | D | 27,891 | $0.00 | 0 | D | M |
| 05 Mar, 2026 | Steven Pieper | Stock Option (Right to Buy) | D | 14,036 | $0.00 | 0 | D | M |
| 02 Mar, 2026 | Beth Hecht | Common Stock | D | 16,567 | $6.24 | 1,226,607 | D | S |
| 02 Mar, 2026 | Beth Hecht | Common Stock | D | 100 | $7.06 | 1,226,507 | D | S |
| 24 Feb, 2026 | Anh Tu Nguyen | Common Stock | D | 29,300 | $6.88 | 395,023 | D | F |
| 30 Jan, 2026 | Anh Tu Nguyen | Common Stock | A | 121,293 | $0.00 | 424,323 | D | A |
| 30 Jan, 2026 | Steven Pieper | Common Stock | A | 154,986 | $0.00 | 1,572,547 | D | A |
| 30 Jan, 2026 | Kevin Mcculloch | Common Stock | A | 168,463 | $0.00 | 1,853,889 | D | A |
| 30 Jan, 2026 | Beth Hecht | Common Stock | A | 121,293 | $0.00 | 1,429,396 | D | A |
| 30 Jan, 2026 | John Patrick Jr Shannon | Common Stock | A | 478,436 | $0.00 | 3,276,083 | D | A |
| 31 Jan, 2026 | Steven Pieper | Common Stock | D | 111,765 | $7.36 | 1,460,782 | D | F |
| 31 Jan, 2026 | Beth Hecht | Common Stock | D | 98,375 | $7.36 | 1,331,021 | D | F |