Kala Bio's top three insider shareholders as of September 09, 2026 are Hongming Chen (Chief Scientific Officer, 204.51K shares), Eric Trachtenberg (Officer, 68.07K shares), Darius Kharabi (Chief Business Officer, 41.76K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Hongming Chen | Chief Scientific Officer | 204,515 | 0 | 204,515 | 45.2% | 28 Oct, 2021 |
| 2 | Eric Trachtenberg | Officer | 68,066 | 0 | 68,066 | 15.1% | 05 Jan, 2024 |
| 3 | Darius Kharabi | Chief Business Officer | 41,760 | 0 | 41,760 | 9.2% | 24 Oct, 2025 |
| 4 | Romulus K Brazzell | Chief Medical Officer | 35,952 | 0 | 35,952 | 8.0% | 24 Oct, 2025 |
| 5 | Todd Bazemore | Chief Operating Officer | 35,932 | 0 | 35,932 | 7.9% | 24 Oct, 2025 |
| 6 | Mary Reumuth | Chief Financial Officer | 28,906 | 0 | 28,906 | 6.4% | 24 Oct, 2025 |
| 7 | Howard B Rosen | Director | 16,240 | 0 | 16,240 | 3.6% | 17 Jun, 2025 |
| 8 | C. Daniel Myers | Director | 10,374 | 0 | 10,374 | 2.3% | 17 Jun, 2025 |
| 9 | Marjan Farid | Director | 10,242 | 0 | 10,242 | 2.3% | 17 Jun, 2025 |
| 10 | Bros. Advisors Lp Baker | Other | 0 | 170 | 170 | 0.0% | 02 Oct, 2025 |
| 11 | Mark T Iwicki | Chief Executive Officer | 41 | 0 | 41 | 0.0% | 24 Oct, 2025 |
| 12 | Mark S. Blumenkranz | Director | 5 | 0 | 5 | 0.0% | 12 Jun, 2024 |
| 13 | Andrew I Koven | Director | 5 | 0 | 5 | 0.0% | 23 Jun, 2023 |
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 |
|---|---|---|---|---|---|---|---|---|
| 22 Oct, 2025 | Darius Kharabi | Chief Business Officer | Disposed S | 20,806 | $0.83 | $17.27K | 41,760 | Direct |
| 22 Oct, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 32,230 | $0.83 | $26.75K | 29,873 | Direct |
| 23 Oct, 2025 | Mark T Iwicki | Director | Disposed S | 154,894 | $2,025.00 | $313.66Mn | 41 | Direct |
| 22 Oct, 2025 | Darius Kharabi | Chief Business Officer | Disposed S | 20,806 | $0.83 | $17.27K | 41,760 | Direct |
| 22 Oct, 2025 | Romulus K Brazzell | Officer | Disposed S | 46,748 | $0.83 | $38.80K | 35,952 | Direct |
| 22 Oct, 2025 | Todd Bazemore | Director | Disposed S | 47,768 | $0.83 | $39.65K | 35,932 | Direct |
| 22 Oct, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 32,230 | $0.83 | $26.75K | 29,873 | Direct |
| 22 Oct, 2025 | Darius Kharabi | Chief Business Officer | Disposed S | 20,806 | $0.83 | $17.27K | 41,760 | Direct |
| 22 Oct, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 32,230 | $0.83 | $26.75K | 29,873 | Direct |
| 23 Oct, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 967 | $0.82 | $793 | 28,906 | Direct |
| 23 Oct, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 967 | $0.82 | $793 | 28,906 | Direct |
| 23 Oct, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 967 | $0.82 | $793 | 28,906 | Direct |
| 30 Sep, 2025 | Bros. Advisors Lp Baker | Other | Disposed S | 21,376 | $3,989.75 | $85.28Mn | 39 | Indirect |
| 30 Sep, 2025 | Bros. Advisors Lp Baker | Other | Disposed S | 195,425 | $3,989.75 | $779.70Mn | 355 | Indirect |
| 01 Oct, 2025 | Bros. Advisors Lp Baker | Other | Disposed S | 50,640 | $3,459.50 | $175.19Mn | 19 | Indirect |
| 01 Oct, 2025 | Bros. Advisors Lp Baker | Other | Disposed S | 462,967 | $3,459.50 | $1.60Bn | 170 | Indirect |
| 29 Aug, 2025 | Todd Bazemore | Director, Officer | Acquired A | 180,000 | $0.00 | $0 | 180,000 | Direct |
| 24 Jun, 2025 | Mary Reumuth | Chief Financial Officer | Disposed S | 3,631 | $4.01 | $14.56K | 62,100 | Direct |
| 24 Jun, 2025 | Todd Bazemore | Officer | Disposed S | 4,058 | $4.01 | $16.27K | 83,699 | Direct |
| 24 Jun, 2025 | Darius Kharabi | Chief Business Officer | Disposed S | 4,511 | $4.01 | $18.09K | 62,566 | Direct |