As of September 29, 2026, the three largest insider holders of LSTA are David J Mazzo (President Ceo, 311.89K shares), Mohammad Azab (Director, 104.92K shares), Steven M Klosk (Director, 95.81K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | David J Mazzo | President Ceo | 311,890 | 0 | 311,890 | 31.4% | 13 Jan, 2026 |
| 2 | Mohammad Azab | Director | 104,925 | 0 | 104,925 | 10.6% | 13 Jan, 2026 |
| 3 | Steven M Klosk | Director | 95,815 | 0 | 95,815 | 9.7% | 13 Jan, 2026 |
| 4 | Gregory B Brown | Director | 95,659 | 0 | 95,659 | 9.6% | 13 Jan, 2026 |
| 5 | Cynthia Louise Flowers | Director | 95,446 | 0 | 95,446 | 9.6% | 13 Jan, 2026 |
| 6 | Kristen K Buck | Evp, Rd And Cmo | 93,462 | 0 | 93,462 | 9.4% | 13 Jan, 2026 |
| 7 | Heidi Henson | Director | 85,725 | 0 | 85,725 | 8.6% | 13 Jan, 2026 |
| 8 | Tariq Imam | Svp, Bus Dev, General Counsel | 36,078 | 0 | 36,078 | 3.6% | 13 Jan, 2026 |
| 9 | James Nisco | Svp, Fin/Treas, Chief Actg Off | 32,311 | 0 | 32,311 | 3.3% | 13 Jan, 2026 |
| 10 | David W. Slack | President Cbo | 20,642 | 0 | 20,642 | 2.1% | 11 Jan, 2023 |
| 11 | Erkki Ruoslahti | Director | 20,000 | 0 | 20,000 | 2.0% | 11 Jan, 2023 |
| 12 | Steven S Myers | Director | 1 | 0 | 1 | 0.0% | 12 Jan, 2022 |
| 13 | Michael H. Davidson | Director | 1 | 0 | 1 | 0.0% | 12 Jan, 2022 |
| 14 | Anne Clem Whitaker | Director | 1 | 0 | 1 | 0.0% | 12 Jan, 2022 |
| 15 | Todd C Girolamo | Clo, Svp Of Corp Dev | 1 | 0 | 1 | 0.0% | 18 Jan, 2022 |
| 16 | Peter G Traber | Director | 1 | 0 | 1 | 0.0% | 12 Jan, 2022 |
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 |
|---|---|---|---|---|---|---|---|---|
| 09 Jan, 2026 | Steven M Klosk | Director | Acquired A | 30,456 | $0.00 | $0 | 95,815 | Direct |
| 09 Jan, 2026 | Mohammad Azab | Director | Acquired A | 30,456 | $0.00 | $0 | 104,925 | Direct |
| 09 Jan, 2026 | Heidi Henson | Director | Acquired A | 30,456 | $0.00 | $0 | 85,725 | Direct |
| 09 Jan, 2026 | David J Mazzo | President Ceo | Acquired A | 81,000 | $0.00 | $0 | 352,986 | Direct |
| 09 Jan, 2026 | Kristen K Buck | Evp, Rd And Cmo | Acquired A | 25,000 | $0.00 | $0 | 104,794 | Direct |
| 09 Jan, 2026 | Tariq Imam | Svp, Bus Dev, General Counsel | Acquired A | 15,000 | $0.00 | $0 | 39,579 | Direct |
| 09 Jan, 2026 | James Nisco | Svp, Fin/Treas, Chief Actg Off | Acquired A | 15,000 | $0.00 | $0 | 38,491 | Direct |
| 09 Jan, 2026 | Gregory B Brown | Director | Acquired A | 30,456 | $0.00 | $0 | 95,659 | Direct |
| 09 Jan, 2026 | Cynthia Louise Flowers | Director | Acquired A | 30,456 | $0.00 | $0 | 95,446 | Direct |
| 09 Jan, 2026 | Tariq Imam | Svp, Bus Dev, General Counsel | Disposed F | 1,401 | $1.97 | $2.76K | 38,178 | Direct |
| 09 Jan, 2026 | Kristen K Buck | Evp, Rd And Cmo | Disposed F | 2,982 | $1.97 | $5.87K | 101,812 | Direct |
| 09 Jan, 2026 | David J Mazzo | President Ceo | Disposed F | 10,503 | $1.97 | $20.69K | 342,483 | Direct |
| 09 Jan, 2026 | James Nisco | Svp, Fin/Treas, Chief Actg Off | Disposed F | 2,131 | $1.97 | $4.20K | 36,360 | Direct |
| 09 Jan, 2026 | James Nisco | Svp, Fin/Treas, Chief Actg Off | Disposed F | 2,131 | $1.97 | $4.20K | 34,229 | Direct |
| 09 Jan, 2026 | David J Mazzo | President Ceo | Disposed F | 10,515 | $1.97 | $20.71K | 331,968 | Direct |
| 09 Jan, 2026 | Kristen K Buck | Evp, Rd And Cmo | Disposed F | 2,982 | $1.97 | $5.87K | 98,830 | Direct |
| 09 Jan, 2026 | Tariq Imam | Svp, Bus Dev, General Counsel | Disposed F | 840 | $1.97 | $1.65K | 37,338 | Direct |
| 09 Jan, 2026 | James Nisco | Svp, Fin/Treas, Chief Actg Off | Disposed F | 1,137 | $1.97 | $2.24K | 33,092 | Direct |
| 09 Jan, 2026 | Kristen K Buck | Evp, Rd And Cmo | Disposed F | 3,221 | $1.97 | $6.35K | 95,609 | Direct |
| 09 Jan, 2026 | David J Mazzo | President Ceo | Disposed F | 12,224 | $1.97 | $24.08K | 319,744 | Direct |