As of September 29, 2026, Calix's top three insider holders are Carl Russo (Chairman, 3.96Mn shares), Carl Russo (President And Ceo, 1.57Mn shares), Donald J Listwin (Director, 497.53K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Carl Russo | President And Ceo | 0 | 1,569,188 | 1,569,188 | 52.5% | 28 Jul, 2026 |
| 2 | Donald J Listwin | Director | 497,533 | 0 | 497,533 | 16.6% | 04 Aug, 2023 |
| 3 | Michael T Everett | Director | 196,779 | 0 | 196,779 | 6.6% | 05 Dec, 2022 |
| 4 | Kevin Robert Peters | Director | 130,717 | 0 | 130,717 | 4.4% | 12 May, 2025 |
| 5 | J Daniel Plants | Director | 0 | 117,865 | 117,865 | 3.9% | 29 Oct, 2021 |
| 6 | Cory Sindelar | Chief Financial Officer | 103,994 | 0 | 103,994 | 3.5% | 17 Feb, 2026 |
| 7 | Kevin A Denuccio | Director | 80,000 | 0 | 80,000 | 2.7% | 04 May, 2022 |
| 8 | Christopher J Bowick | Director | 71,583 | 0 | 71,583 | 2.4% | 18 May, 2026 |
| 9 | Kathleen M Crusco | Director | 64,361 | 0 | 64,361 | 2.2% | 18 May, 2026 |
| 10 | Michael Matthews | Director | 64,000 | 0 | 64,000 | 2.1% | 03 Nov, 2022 |
| 11 | Kira Makagon | Director | 43,931 | 0 | 43,931 | 1.5% | 18 May, 2026 |
| 12 | Michael Weening | President Ceo | 16,556 | 0 | 16,556 | 0.6% | 17 Feb, 2026 |
| 13 | Wade Oosterman | Director | 12,156 | 0 | 12,156 | 0.4% | 18 May, 2026 |
| 14 | Michael J Berry | Director | 9,656 | 0 | 9,656 | 0.3% | 18 May, 2026 |
| 15 | Rajatish Mukherjee | Director | 9,656 | 0 | 9,656 | 0.3% | 18 May, 2026 |
| 16 | John Durocher | Coo | 2,367 | 0 | 2,367 | 0.1% | 17 Feb, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 27 Jul, 2026 | Carl Russo | Director, TenPercentOwner | Disposed S | 75,000 | $36.20 | $2.71Mn | 1,569,188 | Indirect |
| 29 Jun, 2026 | Carl Russo | Director, TenPercentOwner | Acquired A | 15,999 | $0.00 | $0 | 15,999 | Direct |
| 14 May, 2026 | Kathleen M Crusco | Director | Acquired A | 4,967 | $0.00 | $0 | 64,361 | Direct |
| 14 May, 2026 | Rajatish Mukherjee | Director | Acquired A | 4,967 | $0.00 | $0 | 9,656 | Direct |
| 14 May, 2026 | Wade Oosterman | Director | Acquired A | 4,967 | $0.00 | $0 | 12,156 | Direct |
| 14 May, 2026 | Carl Russo | Director, TenPercentOwner | Acquired A | 4,967 | $0.00 | $0 | 3,958,037 | Direct |
| 14 May, 2026 | Michael J Berry | Director | Acquired A | 4,967 | $0.00 | $0 | 9,656 | Direct |
| 14 May, 2026 | Kira Makagon | Director | Acquired A | 4,967 | $0.00 | $0 | 43,931 | Direct |
| 14 May, 2026 | Christopher J Bowick | Director | Acquired A | 4,967 | $0.00 | $0 | 71,583 | Direct |
| 27 Apr, 2026 | Carl Russo | Director, TenPercentOwner | Disposed S | 20,909 | $43.17 | $902.62K | 1,648,279 | Indirect |
| 27 Apr, 2026 | Carl Russo | Director, TenPercentOwner | Disposed S | 4,091 | $43.75 | $178.98K | 1,644,188 | Indirect |
| 08 Apr, 2026 | Carl Russo | Director, TenPercentOwner | Disposed G | 40,000 | $0.00 | $0 | 3,953,070 | Direct |
| 30 Mar, 2026 | Carl Russo | Director, TenPercentOwner | Acquired A | 11,753 | $0.00 | $0 | 11,753 | Direct |
| 25 Feb, 2026 | Carl Russo | Director, TenPercentOwner | Acquired M | 10,000 | $12.63 | $126.30K | 3,993,070 | Direct |
| 25 Feb, 2026 | Carl Russo | Director, TenPercentOwner | Disposed M | 10,000 | $0.00 | $0 | 560,000 | Direct |
| 14 Feb, 2026 | Cory Sindelar | Chief Financial Officer | Acquired A | 439 | $45.32 | $19.90K | 103,994 | Direct |
| 12 Feb, 2026 | Shane Todd Marshall Eleniak | Chief Product Officer | Acquired A | 195,000 | $0.00 | $0 | 195,000 | Direct |
| 14 Feb, 2026 | John Durocher | Coo | Acquired A | 439 | $45.32 | $19.90K | 2,367 | Direct |
| 14 Feb, 2026 | Michael Weening | President Ceo | Acquired A | 439 | $45.32 | $19.90K | 16,556 | Direct |
| 12 Feb, 2026 | Michael Weening | President Ceo | Acquired A | 217,500 | $0.00 | $0 | 217,500 | Direct |