Calix, Inc (CALX) Insider Ownership

Historic Ownership Trends

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).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
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