Calix, Inc.
Calix, Inc. (CALX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CALX · as of Mar 31, 2025
Ownership Breakdown
270
Institutional Holders
▲ 8 vs Q4
$2.00B
Total Inst. Value
▲ $6.74M vs Q4
63.78M
Shares Outstanding
freeFloat 90.47%
56.55M
13F Shares Held
▼ 732,637 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CALX largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. communications services, nec | 11.10M | 16.81% | 16.81% | $393.25B | May 2, 2025 | ▼ 243.9K |
VANGUARD GROUP INC communications services, nec | 8.02M | 12.14% | 12.14% | $284.06B | May 9, 2025 | ▲ 37.6K |
ALLIANCEBERNSTEIN L.P. communications services, nec | 2.51M | 3.80% | 3.80% | $88.93B | May 15, 2025 | ▲ 270.4K |
STATE STREET CORP communications services, nec | 2.38M | 3.60% | 3.60% | $84.34B | May 15, 2025 | ▼ 85.4K |
MILLENNIUM MANAGEMENT LLC communications services, nec | 1.77M | 2.67% | 2.67% | $62.55B | May 15, 2025 | ▼ 266.2K |
DIMENSIONAL FUND ADVISORS LP communications services, nec | 1.73M | 2.61% | 2.61% | $61.15B | May 13, 2025 | ▼ 106.9K |
CONGRESS ASSET MANAGEMENT CO /MA communications services, nec | 1.38M | 2.09% | 2.09% | $48.85B | Apr 11, 2025 | ▲ 103.2K |
GEODE CAPITAL MANAGEMENT, LLC communications services, nec | 1.38M | 2.09% | 2.09% | $48.82B | May 13, 2025 | ▲ 39.6K |
TD ASSET MANAGEMENT INC communications services, nec | 1.31M | 1.99% | 1.99% | $46.56B | May 7, 2025 | ▼ 79.4K |
BANK OF NEW YORK MELLON CORP communications services, nec | 1.14M | 1.73% | 1.73% | $40.57B | Apr 29, 2025 | ▼ 228.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
24
Increased
+2.96M shares3
New Positions
first time holders22
Decreased
−2.56M shares0
Sold Out
fully exitedNet shares change (top 50)
+402.5K
+2.96M / −2.56M
Net new holders
+5
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CALX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
5
Buy transactions
4
Sell transactions
1.25
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Weening Michael President & CEO | Nov 27, 2023 | Award | 120,000 | $37.80 | $4.54M | 120.0K | Form 4 ↗ |
SINDELAR CORY Chief Financial Officer | Nov 27, 2023 | Award | 100,000 | $37.80 | $3.78M | 100.0K | Form 4 ↗ |
Collins John Matthew Chief Commercial Ops Officer | Oct 27, 2023 | Sale | 60,000 | $33.14 | $1.99M | 0 | Form 4 ↗ |
LISTWIN DONALD J director | Aug 4, 2023 | Sale | 100,000 | $43.15 | $4.32M | 497.5K | Form 4 ↗ |
Collins John Matthew Chief Commercial Ops Officer | Jul 25, 2023 | Sale | 10,000 | $47.12 | $471.2K | 0 | Form 4 ↗ |
BOWICK CHRISTOPHER J director | May 11, 2023 | Award | 8,183 | $42.79 | $350.2K | 8.2K | Form 4 ↗ |
LISTWIN DONALD J director | May 11, 2023 | Award | 8,183 | $42.79 | $350.2K | 8.2K | Form 4 ↗ |
Peters Kevin Robert director | May 11, 2023 | Award | 8,183 | $42.79 | $350.2K | 8.2K | Form 4 ↗ |
Mukherjee Rajatish director | May 11, 2023 | Award | 8,183 | $42.79 | $350.2K | 8.2K | Form 4 ↗ |
CRUSCO KATHLEEN M director | May 11, 2023 | Award | 8,183 | $42.79 | $350.2K | 8.2K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Calix, Inc. (CALX) is primarily owned by institutional investors, who hold approximately 88.7% of total shares outstanding. Company insiders own approximately 9.53%, while retail and public investors account for the remaining 1.80%.
The largest institutional shareholder of Calix, Inc. is BLACKROCK, INC., holding approximately 11.10 million shares — equal to 16.81% of outstanding shares — as of March 31, 2025.
A total of 270 institutional investors currently hold CALX stock, with a combined institutional value of approximately $2.00 billion as of the most recent 13F filing period.
Frequently asked questions
CALX ownershipCalix, Inc. (CALX) is primarily owned by institutional investors, who hold approximately 88.7% of shares. The largest shareholder is BLACKROCK, INC. with a 16.81% stake. Company insiders hold 9.53%. Data sourced from SEC Form 13F as of March 31, 2025.