CALC's three largest insider shareholders as of September 29, 2026 are Eric W Roberts (Chief Business Officer, 53.57K shares), Investments Spv Iv Llc Valence (TenPercentOwner, 52.81K shares), A. Rachel Leheny (Chief Executive Officer, 52.81K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Investments Spv Iv Llc Valence | TenPercentOwner | 25,500 | 27,310 | 52,810 | 35.0% | 03 May, 2023 |
| 2 | Venture Partners Vi Lp Sanderling | TenPercentOwner | 13,525 | 19,377 | 32,902 | 21.8% | 25 Jan, 2024 |
| 3 | Robert N Wilson | Director | 22,924 | 0 | 22,924 | 15.2% | 29 Jun, 2026 |
| 4 | Fred A Middleton | Director, TenPercentOwner | 0 | 15,190 | 15,190 | 10.1% | 29 Jun, 2026 |
| 5 | Venture Partners Vi Co Investment Fund Lp Sanderling | TenPercentOwner | 11,633 | 321 | 11,954 | 7.9% | 05 Nov, 2024 |
| 6 | Eric W Roberts | Chief Business Officer | 5,235 | 0 | 5,235 | 3.5% | 29 Jun, 2026 |
| 7 | A. Rachel Leheny | Chief Executive Officer | 4,538 | 0 | 4,538 | 3.0% | 29 Jun, 2026 |
| 8 | Sudarshan Hebbar | Chief Medical Officer | 2,658 | 0 | 2,658 | 1.8% | 29 Jun, 2026 |
| 9 | Frederic Guerard | Chief Executive Officer | 1,296 | 0 | 1,296 | 0.9% | 27 Mar, 2023 |
| 10 | Robert S Breuil | Chief Financial Officer | 505 | 0 | 505 | 0.3% | 27 Mar, 2023 |
| 11 | Parisa Zamiri | Chief Medical Officer | 414 | 0 | 414 | 0.3% | 27 Mar, 2023 |
| 12 | Kenneth A. Stauderman | Chief Scientific Officer | 185 | 0 | 185 | 0.1% | 29 Jul, 2025 |
| 13 | Michael J. Dunn | President And Coo | 168 | 0 | 168 | 0.1% | 11 Sep, 2024 |
| 14 | Eric Bjerkholt | Director | 53 | 0 | 53 | 0.0% | 01 Jun, 2023 |
| 15 | Stephen Bardin | Chief Financial Officer | 0 | 43 | 43 | 0.0% | 26 Jun, 2025 |
| 16 | Christina Ackermann | Director | 20 | 0 | 20 | 0.0% | 27 Mar, 2023 |
| 17 | Dirk Sauer | Director | 20 | 0 | 20 | 0.0% | 27 Mar, 2023 |
| 18 | Julia Marie Eastland | Director | 20 | 0 | 20 | 0.0% | 27 Mar, 2023 |
| 19 | Christy L Shaffer | Director | 20 | 0 | 20 | 0.0% | 27 Mar, 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 |
|---|---|---|---|---|---|---|---|---|
| 24 Sep, 2026 | Stephen Bardin | Chief Financial Officer | Acquired A | 190,000 | $0.00 | $0 | 190,000 | Direct |
| 24 Sep, 2026 | Sudarshan Hebbar | Chief Medical Officer | Acquired A | 180,000 | $0.00 | $0 | 180,000 | Direct |
| 24 Sep, 2026 | A. Rachel Leheny | Chief Executive Officer | Acquired A | 360,000 | $0.00 | $0 | 360,000 | Direct |
| 24 Sep, 2026 | Kenneth A. Stauderman | Chief Scientific Officer | Acquired A | 180,000 | $0.00 | $0 | 180,000 | Direct |
| 19 Aug, 2026 | Capital Co Llc Alafi | TenPercentOwner | Acquired A | 3,529,192 | $0.00 | $0 | 50,418 | Direct |
| 19 Aug, 2026 | Capital Co Llc Alafi | TenPercentOwner | Acquired A | 3,529,192 | $0.00 | $0 | 50,418 | Direct |
| 19 Aug, 2026 | A. Rachel Leheny | Chief Executive Officer | Acquired A | 186,729 | $0.00 | $0 | 2,668 | Direct |
| 19 Aug, 2026 | Eric W Roberts | Chief Business Officer | Acquired A | 186,729 | $0.00 | $0 | 2,668 | Direct |
| 19 Aug, 2026 | Frederic Guerard | Director | Acquired A | 10,000 | $0.00 | $0 | 143 | Direct |
| 19 Aug, 2026 | Robert N Wilson | Director | Acquired A | 1,182,621 | $0.00 | $0 | 16,895 | Direct |
| 19 Aug, 2026 | Sudarshan Hebbar | Chief Medical Officer | Acquired A | 124,486 | $0.00 | $0 | 1,778 | Direct |
| 19 Aug, 2026 | Alan Glicklich | Director | Acquired A | 10,000 | $0.00 | $0 | 143 | Direct |
| 19 Aug, 2026 | Allan Shaw | Director | Acquired A | 10,000 | $0.00 | $0 | 143 | Direct |
| 19 Aug, 2026 | Evgeny Zaytsev | Director | Acquired A | 1,450,267 | $0.00 | $0 | 20,719 | Indirect |
| 19 Aug, 2026 | A. Rachel Leheny | Chief Executive Officer | Acquired A | 186,729 | $0.00 | $0 | 2,668 | Direct |
| 19 Aug, 2026 | Eric W Roberts | Chief Business Officer | Acquired A | 186,729 | $0.00 | $0 | 2,668 | Direct |
| 19 Aug, 2026 | Sudarshan Hebbar | Chief Medical Officer | Acquired A | 124,486 | $0.00 | $0 | 1,778 | Direct |
| 19 Aug, 2026 | Evgeny Zaytsev | Director | Acquired A | 1,450,267 | $0.00 | $0 | 20,719 | Indirect |
| 19 Aug, 2026 | Robert N Wilson | Director | Acquired A | 1,182,621 | $0.00 | $0 | 16,895 | Direct |
| 19 Aug, 2026 | Evgeny Zaytsev | Director | Acquired A | 10,000 | $0.00 | $0 | 143 | Direct |