As of September 29, 2026, Kodiak Sciences's top three insider holders are Bros. Advisors Lp Baker (Director, 18.36Mn shares), Victor Perlroth (Chairman And Ceo, 2.40Mn shares), John A. Borgeson (Chief Financial Officer, 211.93K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Bros. Advisors Lp Baker | Director, TenPercentOwner | 0 | 18,358,772 | 18,358,772 | 87.3% | 19 Dec, 2025 |
| 2 | Victor Perlroth | Chairman And Ceo | 2,395,538 | 0 | 2,395,538 | 11.4% | 27 Mar, 2026 |
| 3 | John A. Borgeson | Chief Financial Officer | 211,930 | 0 | 211,930 | 1.0% | 05 Jun, 2026 |
| 4 | Jason Ehrlich | Officer | 61,924 | 0 | 61,924 | 0.3% | 16 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 |
|---|---|---|---|---|---|---|---|---|
| 15 Jul, 2026 | John A. Borgeson | Chief Financial Officer | Acquired A | 66,500 | $0.00 | $0 | 66,500 | Direct |
| 15 Jul, 2026 | Victor Perlroth | Chairman And Ceo | Acquired A | 100,000 | $0.00 | $0 | 100,000 | Direct |
| 30 Jun, 2026 | Robert Profusek | Director | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Direct |
| 30 Jun, 2026 | Taiyin Yang | Director | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Direct |
| 30 Jun, 2026 | Richard S Levy | Director | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Direct |
| 30 Jun, 2026 | Charles A Bancroft | Director | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Direct |
| 30 Jun, 2026 | Bassil I Dahiyat | Director | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Direct |
| 30 Jun, 2026 | Bros. Advisors Lp Baker | Director, TenPercentOwner | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Indirect |
| 30 Jun, 2026 | Bros. Advisors Lp Baker | Director, TenPercentOwner | Acquired A | 17,731 | $0.00 | $0 | 17,731 | Indirect |
| 04 Jun, 2026 | John A. Borgeson | Chief Financial Officer | Acquired M | 30,000 | $1.04 | $31.20K | 241,930 | Direct |
| 04 Jun, 2026 | John A. Borgeson | Chief Financial Officer | Disposed S | 25,896 | $34.01 | $880.72K | 216,034 | Direct |
| 04 Jun, 2026 | John A. Borgeson | Chief Financial Officer | Disposed S | 4,104 | $34.67 | $142.29K | 211,930 | Direct |
| 04 Jun, 2026 | John A. Borgeson | Chief Financial Officer | Disposed M | 30,000 | $0.00 | $0 | 0 | Direct |
| 15 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Acquired M | 28,614 | $1.04 | $29.76K | 211,930 | Direct |
| 15 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Disposed M | 28,614 | $0.00 | $0 | 30,000 | Direct |
| 02 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Acquired M | 30,000 | $1.04 | $31.20K | 213,316 | Direct |
| 02 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Disposed S | 12,692 | $39.14 | $496.76K | 200,624 | Direct |
| 02 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Disposed S | 12,477 | $40.29 | $502.70K | 188,147 | Direct |
| 02 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Disposed S | 4,231 | $40.88 | $172.96K | 183,916 | Direct |
| 02 Apr, 2026 | John A. Borgeson | Chief Financial Officer | Disposed S | 600 | $41.77 | $25.06K | 183,316 | Direct |