Calix, Inc (CALX) Insider Ownership

Historic Insider Ownership Trends

As of April 28, 2026, Calix's top three insider holders are Carl Russo (Chairman, 3.99Mn shares), Carl Russo (Chairman, 3.95Mn shares), Carl Russo (President And Ceo, 1.67Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Carl Russo Chairman 3,993,070 0 26 Feb, 2026
Carl Russo Chairman 3,953,070 0 10 Apr, 2026
Carl Russo President And Ceo 0 1,669,188 04 Feb, 2026
Carl Russo President And Ceo 0 1,669,188 04 Feb, 2026
Donald J Listwin - 497,533 0 04 Aug, 2023
Donald J Listwin - 0 310,000 07 Feb, 2022
Michael T Everett - 196,779 0 05 Dec, 2022
Kevin Robert Peters - 130,717 0 12 May, 2025
Kevin Robert Peters - 130,717 0 12 May, 2025
J Daniel Plants - 0 117,865 29 Oct, 2021
J Daniel Plants - 0 117,865 29 Oct, 2021
Cory Sindelar Chief Financial Officer 103,994 0 17 Feb, 2026
Christopher J Bowick - 66,616 0 12 May, 2025
Michael Matthews - 64,000 0 03 Nov, 2022
Michael Matthews - 64,000 0 03 Nov, 2022
Michael Weening President Ceo 16,556 0 17 Feb, 2026
Michael Weening President Ceo 16,556 0 17 Feb, 2026
Wade Oosterman - 7,189 0 12 May, 2025
Wade Oosterman - 7,189 0 12 May, 2025
Michael J Berry - 4,689 0 12 May, 2025
Rajatish Mukherjee - 4,689 0 12 May, 2025
Rajatish Mukherjee - 4,689 0 12 May, 2025
John Durocher Coo 2,367 0 17 Feb, 2026
John Durocher Coo 2,367 0 17 Feb, 2026

* 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
08 Apr, 2026 Carl Russo Common Stock D 40,000 $0.00 3,953,070 D G
30 Mar, 2026 Carl Russo Stock Options (right to buy) A 11,753 $0.00 11,753 D A
30 Mar, 2026 Carl Russo Stock Options (right to buy) A 11,753 $0.00 11,753 D A
25 Feb, 2026 Carl Russo Common Stock A 10,000 $12.63 3,993,070 D M
25 Feb, 2026 Carl Russo Common Stock A 10,000 $12.63 3,993,070 D M
25 Feb, 2026 Carl Russo Stock Option (right to buy) D 10,000 $0.00 560,000 D M
25 Feb, 2026 Carl Russo Stock Option (right to buy) D 10,000 $0.00 560,000 D M
14 Feb, 2026 Michael Weening Common Stock A 439 $45.32 16,556 D A
14 Feb, 2026 Michael Weening Common Stock A 439 $45.32 16,556 D A
14 Feb, 2026 John Durocher Common Stock A 439 $45.32 2,367 D A
14 Feb, 2026 John Durocher Common Stock A 439 $45.32 2,367 D A
12 Feb, 2026 Shane Todd Marshall Eleniak Stock Option A 195,000 $0.00 195,000 D A
14 Feb, 2026 Cory Sindelar Common Stock A 439 $45.32 103,994 D A
12 Feb, 2026 Shane Todd Marshall Eleniak Stock Option A 195,000 $0.00 195,000 D A
12 Feb, 2026 Cory Sindelar Stock Option (right to buy) A 170,000 $0.00 170,000 D A
12 Feb, 2026 John Durocher Stock Option (right to buy) A 195,000 $0.00 195,000 D A
12 Feb, 2026 John Durocher Stock Option (right to buy) A 195,000 $0.00 195,000 D A
12 Feb, 2026 Michael Weening Stock Option (right to buy) A 217,500 $0.00 217,500 D A
12 Feb, 2026 Michael Weening Stock Option (right to buy) A 217,500 $0.00 217,500 D A
03 Feb, 2026 Carl Russo Common Stock D 13,477 $46.93 1,680,711 I S