According to recent filings covering the 90 days ending February 07, 2026, the three most significant insider holders at Atai Beckley are TenPercentOwner Investment Group Ltd. Apeiron (53.41Mn shares), Director Christian Angermayer (20.19Mn shares), Director Cosmo Feilding-Mellen (7.70Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Investment Group Ltd. Apeiron | 53,412,414 | 02 Oct, 2025 | |
| Christian Angermayer | 20,185,200 | 24 Jun, 2021 | |
| Cosmo Feilding-Mellen | 7,702,990 | 06 Nov, 2025 | |
| Florian Brand | Nan | 331,030 | 20 May, 2024 |
| Srinivas Rao | Nan | 216,442 | 24 Mar, 2025 |
| Anne Nagengast Johnson | Chief Financial Officer | 140,045 | 24 Mar, 2025 |
| Sahil Kirpekar | Chief Business Officer | 115,636 | 24 Mar, 2025 |
| Glenn Frank Short | Chief Scientific Officer | 42,333 | 24 Mar, 2025 |
| Kevin James Craig | Chief Medical Officer | 8,437 | 24 Mar, 2025 |
| Amir H Kalali | 4,666 | 24 Jun, 2021 | |
| Rosnay Alexis De | 4,666 | 24 Jun, 2021 | |
| Gregory L Weaver | Chief Financial Officer | 4,666 | 24 Jun, 2021 |
| Andrea Heslin Smiley | 4,666 | 24 Jun, 2021 |
* 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 Nov, 2025 | Cosmo Feilding-Mellen | Common Shares | A | 7,702,990 | - | 7,702,990 | D | A |
| 30 Sep, 2025 | Investment Group Ltd. Apeiron | Common Shares | A | 2,367,200 | - | 53,412,414 | I | C |
| 14 Aug, 2025 | Investment Group Ltd. Apeiron | - | - | 51,045,214 | I | |||
| 14 Aug, 2025 | Investment Group Ltd. Apeiron | Common Shares | A | 8,675,799 | $2.19 | 51,045,214 | I | P |
| 24 Mar, 2025 | Investment Group Ltd. Apeiron | Common Shares | A | 1,800,000 | $1.40 | 42,369,415 | I | P |
| 21 Mar, 2025 | Srinivas Rao | Common Shares | D | 75,418 | $1.35 | 212,942 | D | S |
| 21 Mar, 2025 | Sahil Kirpekar | Common Shares | D | 48,563 | $1.35 | 115,636 | D | S |
| 21 Mar, 2025 | Anne Nagengast Johnson | Common Shares | D | 33,545 | $1.35 | 140,045 | D | S |
| 21 Mar, 2025 | Glenn Frank Short | Common Shares | D | 13,161 | $1.35 | 42,333 | D | S |
| 21 Mar, 2025 | Kevin James Craig | Common Shares | D | 11,563 | $1.35 | 8,437 | D | S |
| 14 Mar, 2025 | Srinivas Rao | Common Shares | A | 175,000 | - | 288,360 | D | M |
| 14 Mar, 2025 | Srinivas Rao | - | - | 288,360 | D | |||
| 14 Mar, 2025 | Sahil Kirpekar | Common Shares | A | 100,000 | - | 164,199 | D | M |
| 14 Mar, 2025 | Anne Nagengast Johnson | Common Shares | A | 100,000 | - | 173,590 | D | M |
| 14 Mar, 2025 | Glenn Frank Short | Common Shares | A | 32,500 | - | 55,494 | D | M |
| 14 Mar, 2025 | Kevin James Craig | Common Shares | A | 20,000 | - | 20,000 | D | M |
| 14 Feb, 2025 | Investment Group Ltd. Apeiron | Common Shares | A | 10,835,718 | $2.10 | 40,555,215 | I | P |
| 16 May, 2024 | Florian Brand | - | - | 328,697 | D | |||
| 16 May, 2024 | Florian Brand | Common Shares | D | 151,303 | $1.92 | 328,697 | D | S |
| 02 Apr, 2024 | Srinivas Rao | Common Shares | D | 61,640 | $1.85 | 113,360 | D | S |