ZBIO's three largest insider shareholders as of April 17, 2026 are Sciences Gp, Llc Enavate (TenPercentOwner, 3.76Mn shares), One Capital Management, Llc Sr (TenPercentOwner, 3.09Mn shares), Funds Management Llc Fairmount (Director, 2.36Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Sciences Gp, Llc Enavate | - | 0 | 3,761,359 | 18 Sep, 2024 |
| One Capital Management, Llc Sr | - | 0 | 3,091,290 | 14 Oct, 2025 |
| Funds Management Llc Fairmount | - | 0 | 2,359,025 | 01 Apr, 2026 |
| Funds Management Llc Fairmount | - | 0 | 1,892,806 | 17 Sep, 2024 |
| Patrick G Enright | - | 11,990 | 1,832,669 | 14 Oct, 2025 |
| Leon O Jr Moulder | Chief Executive Officer | 0 | 1,726,039 | 31 Mar, 2026 |
| Jason Raleigh Nunn | - | 0 | 1,173,395 | 14 Oct, 2025 |
| One Capital Management, Llc Sr | - | 0 | 1,110,237 | 16 Sep, 2024 |
| Jason Raleigh Nunn | - | 0 | 1,110,237 | 16 Sep, 2024 |
| Biomedical Innovation Master Investors (Cayman) I L.P. Wellington | - | 801,624 | 0 | 18 Sep, 2024 |
| Hongbo Lu | - | 0 | 426,736 | 02 Apr, 2026 |
| Leon O Jr Moulder | Chief Executive Officer | 423,155 | 0 | 03 Feb, 2026 |
| Ting Xiao | - | 47,000 | 0 | 11 Feb, 2025 |
| Patricia L Allen | - | 19,860 | 0 | 13 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | Hongbo Lu | Common Stock | A | 3,768 | $18.63 | 426,736 | I | P |
| 31 Mar, 2026 | Funds Management Llc Fairmount | Common Stock | A | 150,000 | $20.00 | 2,359,025 | I | P |
| 31 Mar, 2026 | Hongbo Lu | Common Stock | A | 75,000 | $20.00 | 422,968 | I | P |
| 30 Mar, 2026 | Leon O Jr Moulder | Common Stock | A | 20,000 | $18.23 | 1,692,039 | I | P |
| 31 Mar, 2026 | Leon O Jr Moulder | Common Stock | A | 34,000 | $19.31 | 1,726,039 | I | P |
| 12 Feb, 2026 | Patricia L Allen | Common Stock | A | 5,000 | $23.77 | 5,000 | D | P |
| 11 Feb, 2026 | Hongbo Lu | Common Stock | A | 25,985 | $22.50 | 347,968 | I | P |
| 12 Feb, 2026 | Patricia L Allen | Common Stock | A | 5,700 | $24.34 | 10,700 | D | P |
| 12 Feb, 2026 | Patricia L Allen | Common Stock | A | 5,000 | $26.50 | 15,700 | D | P |
| 13 Feb, 2026 | Patricia L Allen | Common Stock | A | 4,160 | $26.36 | 19,860 | D | P |
| 02 Feb, 2026 | Leon O Jr Moulder | Common Stock | A | 57,000 | $17.96 | 423,155 | D | P |
| 07 Jan, 2026 | Leon O Jr Moulder | Common Stock | A | 50,000 | $16.38 | 316,155 | D | P |
| 08 Jan, 2026 | Leon O Jr Moulder | Common Stock | A | 30,000 | $16.30 | 346,155 | D | P |
| 09 Jan, 2026 | Leon O Jr Moulder | Common Stock | A | 20,000 | $16.55 | 366,155 | D | P |
| 09 Oct, 2025 | One Capital Management, Llc Sr | Common Stock | A | 63,158 | $19.00 | 1,173,395 | I | P |
| 09 Oct, 2025 | Jason Raleigh Nunn | Common Stock | A | 63,158 | $19.00 | 1,173,395 | I | P |
| 09 Oct, 2025 | Patrick G Enright | Common Stock | A | 105,265 | $19.00 | 1,832,669 | I | P |
| 09 Oct, 2025 | One Capital Management, Llc Sr | Common Stock | A | 63,157 | $19.00 | 1,917,895 | I | P |
| 09 Oct, 2025 | Patrick G Enright | Common Stock | A | 11,990 | $20.85 | 11,990 | D | P |
| 07 Oct, 2025 | Leon O Jr Moulder | Common Stock | A | 36,928 | $20.85 | 36,928 | I | P |