LBRX's three largest insider shareholders as of September 29, 2026 are Track Biotechnology Master Fund, Ltd. Deep (TenPercentOwner, 3.35Mn shares), Ran Nussbaum (Director, 1.41Mn shares), Management 4 G.P. (2015) Ltd. Pontifax (TenPercentOwner, 1.41Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Track Biotechnology Master Fund, Ltd. Deep | TenPercentOwner | 2,686,138 | 666,666 | 3,352,804 | 47.5% | 16 Sep, 2025 |
| 2 | Ran Nussbaum | Director | 0 | 1,411,681 | 1,411,681 | 20.0% | 16 Sep, 2025 |
| 3 | Management 4 G.P. (2015) Ltd. Pontifax | TenPercentOwner | 0 | 1,411,681 | 1,411,681 | 20.0% | 16 Sep, 2025 |
| 4 | Ventures Gp Iii, L.L.C. Vida | TenPercentOwner | 0 | 882,243 | 882,243 | 12.5% | 16 Sep, 2025 |
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 Jul, 2026 | Track Biotechnology Master Fund, Ltd. Deep | TenPercentOwner | Acquired P | 286,205 | $34.94 | $10.00Mn | 664,649 | Direct |
| 03 Jun, 2026 | Rekha Hemrajani | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 03 Jun, 2026 | William P Jr Kane | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 03 Jun, 2026 | J. Scott Garland | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 03 Jun, 2026 | Rebecca Luse | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 03 Jun, 2026 | Robert R Ruffolo | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 03 Jun, 2026 | Ran Nussbaum | Director | Acquired A | 10,000 | $0.00 | $0 | 10,000 | Direct |
| 03 Jun, 2026 | Robert A. Lenz | Director | Acquired A | 12,500 | $0.00 | $0 | 12,500 | Direct |
| 06 Mar, 2026 | Robert A. Lenz | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 06 Feb, 2026 | Track Biotechnology Master Fund, Ltd. Deep | TenPercentOwner | Acquired P | 378,444 | $21.17 | $8.01Mn | 378,444 | Direct |
| 06 Feb, 2026 | Track Biotechnology Master Fund, Ltd. Deep | TenPercentOwner | Acquired P | 93,925 | $21.17 | $1.99Mn | 93,925 | Indirect |
| 10 Dec, 2025 | Panandiker Kaya Kamlesh Pai | Chief Commercial Officer | Acquired A | 195,000 | $0.00 | $0 | 195,000 | Direct |
| 12 Sep, 2025 | Ventures Gp Iii, L.L.C. Vida | TenPercentOwner | Acquired C | 547,648 | — | — | 547,648 | Indirect |
| 12 Sep, 2025 | Ran Nussbaum | Director | Acquired C | 411,681 | — | — | 411,681 | Indirect |
| 12 Sep, 2025 | Track Biotechnology Master Fund, Ltd. Deep | TenPercentOwner | Acquired C | 686,138 | — | — | 686,138 | Direct |
| 12 Sep, 2025 | Management 4 G.P. (2015) Ltd. Pontifax | TenPercentOwner | Acquired C | 411,681 | — | — | 411,681 | Indirect |
| 12 Sep, 2025 | Track Biotechnology Master Fund, Ltd. Deep | TenPercentOwner | Acquired P | 2,000,000 | $15.00 | $30.00Mn | 2,686,138 | Direct |
| 12 Sep, 2025 | Ran Nussbaum | Director | Acquired P | 1,000,000 | $15.00 | $15.00Mn | 1,411,681 | Indirect |
| 12 Sep, 2025 | Management 4 G.P. (2015) Ltd. Pontifax | TenPercentOwner | Acquired P | 1,000,000 | $15.00 | $15.00Mn | 1,411,681 | Indirect |
| 12 Sep, 2025 | Ventures Gp Iii, L.L.C. Vida | TenPercentOwner | Acquired C | 1,262 | — | — | 1,262 | Indirect |