Based on data from the past 90 days ending December 17, 2025, Calix's three largest insider shareholders are Director Carl Russo (3.99Mn shares), Chief Financial Officer Cory Sindelar (76.56K shares), President & CEO Michael Weening (16.12K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Carl Russo | 3,986,852 | 25 Nov, 2025 | |
| Donald J Listwin | 807,533 | 04 Aug, 2023 | |
| Michael T Everett | 196,779 | 05 Dec, 2022 | |
| Kevin Robert Peters | 130,717 | 12 May, 2025 | |
| J Daniel Plants | 117,865 | 29 Oct, 2021 | |
| Kevin A Denuccio | 80,000 | 04 May, 2022 | |
| Cory Sindelar | Chief Financial Officer | 76,555 | 12 Nov, 2025 |
| Christopher J Bowick | 66,616 | 12 May, 2025 | |
| Michael Matthews | 64,000 | 03 Nov, 2022 | |
| Kathleen M Crusco | 59,394 | 12 May, 2025 | |
| Kira Makagon | 38,964 | 12 May, 2025 | |
| Michael Weening | President & CEO | 16,117 | 03 Nov, 2025 |
| Wade Oosterman | 7,189 | 12 May, 2025 | |
| Michael J Berry | 4,689 | 12 May, 2025 | |
| Rajatish Mukherjee | 4,689 | 12 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 24 Nov, 2025 | Carl Russo | Common Stock | A | 10,000 | $12.63 | 3,973,070 | D | M |
| 17 Nov, 2025 | Carl Russo | Common Stock | A | 10,000 | $12.63 | 3,963,070 | D | M |
| 10 Nov, 2025 | Shane Todd Marshall Eleniak | Common Stock | A | 24,000 | $8.03 | 24,000 | D | M |
| 10 Nov, 2025 | Shane Todd Marshall Eleniak | Common Stock | D | 24,000 | $64.14 | 0 | D | S |
| 06 Nov, 2025 | Cory Sindelar | Common Stock | A | 50,000 | $5.05 | 126,555 | D | M |
| 06 Nov, 2025 | Cory Sindelar | Common Stock | D | 50,000 | $65.30 | 76,555 | D | S |
| 04 Nov, 2025 | Carl Russo | Common Stock | D | 395,000 | $64.00 | 1,719,188 | I | S |
| 04 Nov, 2025 | Shane Todd Marshall Eleniak | Common Stock | A | 50,000 | $7.00 | 50,000 | D | M |
| 04 Nov, 2025 | Carl Russo | Common Stock | D | 12,035 | $65.11 | 1,707,153 | I | S |
| 04 Nov, 2025 | Shane Todd Marshall Eleniak | Common Stock | D | 50,000 | $65.34 | 0 | D | S |
| 04 Nov, 2025 | Carl Russo | Common Stock | D | 12,845 | $66.00 | 1,694,308 | I | S |
| 04 Nov, 2025 | Carl Russo | Common Stock | D | 120 | $66.47 | 1,694,188 | I | S |
| 06 Nov, 2025 | Carl Russo | Common Stock | A | 200,000 | $12.63 | 13,782 | I | M |
| 30 Oct, 2025 | Cory Sindelar | Common Stock | A | 10,000 | $5.05 | 86,555 | D | M |
| 30 Oct, 2025 | Michael Weening | Common Stock | A | 200,000 | $7.84 | 216,117 | D | M |
| 30 Oct, 2025 | Michael Weening | Common Stock | D | 150,000 | $64.63 | 66,117 | D | S |
| 30 Oct, 2025 | Cory Sindelar | Common Stock | D | 10,000 | $65.00 | 76,555 | D | S |
| 31 Oct, 2025 | Cory Sindelar | Common Stock | A | 10,000 | $5.05 | 86,555 | D | M |
| 30 Oct, 2025 | Michael Weening | Common Stock | D | 50,000 | $67.55 | 16,117 | D | S |
| 31 Oct, 2025 | Cory Sindelar | Common Stock | D | 10,000 | $70.00 | 76,555 | D | S |