As of September 29, 2026, the three largest insider holders of ZBIO 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).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Sciences Gp, Llc Enavate | TenPercentOwner | 0 | 3,761,359 | 3,761,359 | 27.6% | 18 Sep, 2024 |
| 2 | One Capital Management, Llc Sr | TenPercentOwner | 0 | 3,091,290 | 3,091,290 | 22.7% | 14 Oct, 2025 |
| 3 | Funds Management Llc Fairmount | Director | 0 | 2,359,025 | 2,359,025 | 17.3% | 01 Apr, 2026 |
| 4 | Patrick G Enright | Director | 11,990 | 1,832,669 | 1,844,659 | 13.5% | 14 Oct, 2025 |
| 5 | Jason Raleigh Nunn | Director | 0 | 1,173,395 | 1,173,395 | 8.6% | 14 Oct, 2025 |
| 6 | Biomedical Innovation Master Investors (Cayman) I L.P. Wellington | TenPercentOwner | 801,624 | 0 | 801,624 | 5.9% | 18 Sep, 2024 |
| 7 | Hongbo Lu | Director | 0 | 426,736 | 426,736 | 3.1% | 02 Apr, 2026 |
| 8 | Leon O Jr Moulder | Chief Executive Officer | 0 | 96,928 | 96,928 | 0.7% | 18 May, 2026 |
| 9 | Ting Xiao | Director | 47,000 | 0 | 47,000 | 0.3% | 11 Feb, 2025 |
| 10 | Patricia L Allen | Director | 19,860 | 0 | 19,860 | 0.1% | 13 Feb, 2026 |
| 11 | Jennifer A. Fox | Officer | 1,592 | 0 | 1,592 | 0.0% | 17 Jun, 2026 |
| 12 | Joseph L Farmer | Officer | 974 | 0 | 974 | 0.0% | 17 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Christy J. Oliger | Director | Acquired A | 37,000 | $0.00 | $0 | 37,000 | Direct |
| 15 Jun, 2026 | Hongbo Lu | Director | Acquired A | 18,500 | $0.00 | $0 | 18,500 | Direct |
| 15 Jun, 2026 | Leon O Jr Moulder | Director, Officer | Acquired A | 500,000 | $0.00 | $0 | 500,000 | Direct |
| 15 Jun, 2026 | James P Boylan | Director | Acquired A | 18,500 | $0.00 | $0 | 18,500 | Direct |
| 05 Feb, 2026 | Jennifer A. Fox | Officer | Acquired A | 1,592 | $13.35 | $21.25K | 1,592 | Direct |
| 05 Feb, 2026 | Joseph L Farmer | Officer | Acquired A | 974 | $13.35 | $13.00K | 974 | Direct |
| 15 Jun, 2026 | Jason Raleigh Nunn | Director | Acquired A | 18,500 | $0.00 | $0 | 18,500 | Direct |
| 15 Jun, 2026 | John J Orloff | Director | Acquired A | 18,500 | $0.00 | $0 | 18,500 | Direct |
| 15 Jun, 2026 | Patrick G Enright | Director | Acquired A | 18,500 | $0.00 | $0 | 18,500 | Direct |
| 15 Jun, 2026 | Moltke Lisa Von | Officer | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 15 Jun, 2026 | Patricia L Allen | Director | Acquired A | 18,500 | $0.00 | $0 | 18,500 | Direct |
| 15 Jun, 2026 | Joseph L Farmer | Officer | Acquired A | 175,000 | $0.00 | $0 | 175,000 | Direct |
| 15 Jun, 2026 | Jennifer A. Fox | Officer | Acquired A | 125,000 | $0.00 | $0 | 125,000 | Direct |
| 18 May, 2026 | Leon O Jr Moulder | Chief Executive Officer | Acquired P | 60,000 | $16.88 | $1.01Mn | 96,928 | Indirect |
| 28 Apr, 2026 | Leon O Jr Moulder | Chief Executive Officer | Acquired P | 25,000 | $18.02 | $450.50K | 1,751,039 | Indirect |
| 29 Apr, 2026 | Leon O Jr Moulder | Chief Executive Officer | Acquired P | 35,000 | $17.62 | $616.70K | 1,786,039 | Indirect |
| 31 Mar, 2026 | Hongbo Lu | Director | Acquired P | 3,768 | $18.63 | $70.20K | 426,736 | Indirect |
| 31 Mar, 2026 | Funds Management Llc Fairmount | Director | Acquired P | 150,000 | $20.00 | $3.00Mn | 2,359,025 | Indirect |
| 30 Mar, 2026 | Leon O Jr Moulder | Chief Executive Officer | Acquired P | 20,000 | $18.23 | $364.60K | 1,692,039 | Indirect |
| 31 Mar, 2026 | Hongbo Lu | Director | Acquired P | 75,000 | $20.00 | $1.50Mn | 422,968 | Indirect |