As of September 29, 2026, the three largest insider holders of ADCT are Group, Llc Redmile (TenPercentOwner, 28.81Mn shares), Group, Llc Redmile (TenPercentOwner, 22.93Mn shares), Hans Peter Wild (TenPercentOwner, 9.79Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Group, Llc Redmile | TenPercentOwner | 23,411,009 | 28,333,462 | 51,744,471 | 76.5% | 02 Apr, 2026 |
| 2 | Hans Peter Wild | TenPercentOwner | 9,788,944 | 0 | 9,788,944 | 14.5% | 15 May, 2025 |
| 3 | Ameet Mallik | Chief Executive Officer | 2,121,769 | 0 | 2,121,769 | 3.1% | 02 Jul, 2026 |
| 4 | Jose Carmona | Chief Financial Officer | 938,076 | 0 | 938,076 | 1.4% | 02 Jul, 2026 |
| 5 | Mohamed Zaki | Chief Medical Officer | 896,317 | 0 | 896,317 | 1.3% | 02 Jul, 2026 |
| 6 | Peter J Graham | Chief Legal Officer | 841,640 | 0 | 841,640 | 1.2% | 02 Jul, 2026 |
| 7 | Peter Hug | Director | 263,344 | 0 | 263,344 | 0.4% | 03 Jun, 2026 |
| 8 | Viviane Monges | Director | 186,447 | 0 | 186,447 | 0.3% | 03 Jun, 2026 |
| 9 | Thomas Pfisterer | Other | 173,899 | 0 | 173,899 | 0.3% | 15 May, 2025 |
| 10 | Victor Sandor | Director | 140,686 | 0 | 140,686 | 0.2% | 03 Jun, 2026 |
| 11 | Jean-Pierre Bizzari | Director | 139,302 | 0 | 139,302 | 0.2% | 03 Jun, 2026 |
| 12 | Lisa Michelle Kallebo | Chief Accounting Officer | 128,224 | 0 | 128,224 | 0.2% | 18 Feb, 2026 |
| 13 | Ron Squarer | Director | 123,431 | 0 | 123,431 | 0.2% | 03 Jun, 2026 |
| 14 | Robert Azelby | Director | 112,805 | 0 | 112,805 | 0.2% | 03 Jun, 2026 |
| 15 | Timothy Coughlin | Director | 72,400 | 0 | 72,400 | 0.1% | 03 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 |
|---|---|---|---|---|---|---|---|---|
| 30 Jun, 2026 | Jose Carmona | Chief Financial Officer | Acquired A | 203,700 | $0.00 | $0 | 938,076 | Direct |
| 30 Jun, 2026 | Ameet Mallik | Chief Executive Officer | Acquired A | 675,000 | $0.00 | $0 | 2,121,769 | Direct |
| 30 Jun, 2026 | Mohamed Zaki | Chief Medical Officer | Acquired A | 213,900 | $0.00 | $0 | 896,317 | Direct |
| 30 Jun, 2026 | Peter J Graham | Chief Legal Officer | Acquired A | 221,100 | $0.00 | $0 | 841,640 | Direct |
| 01 Jun, 2026 | Timothy Coughlin | Director | Acquired A | 45,000 | $0.00 | $0 | 85,000 | Direct |
| 01 Jun, 2026 | Robert Azelby | Director | Acquired A | 45,000 | $0.00 | $0 | 125,405 | Direct |
| 01 Jun, 2026 | Ron Squarer | Director | Acquired A | 45,000 | $0.00 | $0 | 138,627 | Direct |
| 01 Jun, 2026 | Viviane Monges | Director | Acquired A | 45,000 | $0.00 | $0 | 189,043 | Direct |
| 01 Jun, 2026 | Jean-Pierre Bizzari | Director | Acquired A | 45,000 | $0.00 | $0 | 151,902 | Direct |
| 01 Jun, 2026 | Peter Hug | Director | Acquired A | 45,000 | $0.00 | $0 | 265,500 | Direct |
| 01 Jun, 2026 | Victor Sandor | Director | Acquired A | 45,000 | $0.00 | $0 | 153,286 | Direct |
| 03 Jun, 2026 | Robert Azelby | Director | Disposed F | 12,600 | $3.08 | $38.81K | 112,805 | Direct |
| 03 Jun, 2026 | Ron Squarer | Director | Disposed F | 15,196 | $3.08 | $46.80K | 123,431 | Direct |
| 03 Jun, 2026 | Jean-Pierre Bizzari | Director | Disposed F | 12,600 | $3.08 | $38.81K | 139,302 | Direct |
| 03 Jun, 2026 | Timothy Coughlin | Director | Disposed F | 12,600 | $3.08 | $38.81K | 72,400 | Direct |
| 03 Jun, 2026 | Peter Hug | Director | Disposed F | 2,156 | $3.08 | $6.64K | 263,344 | Direct |
| 03 Jun, 2026 | Viviane Monges | Director | Disposed F | 2,596 | $3.08 | $8.00K | 186,447 | Direct |
| 03 Jun, 2026 | Victor Sandor | Director | Disposed F | 12,600 | $3.08 | $38.81K | 140,686 | Direct |
| 31 Mar, 2026 | Group, Llc Redmile | TenPercentOwner | Disposed S | 196,229 | $3.75 | $736.25K | 15,470,502 | Indirect |
| 31 Mar, 2026 | Group, Llc Redmile | TenPercentOwner | Disposed S | 188,407 | $3.75 | $706.90K | 12,957,305 | Direct |