Calix Inc (CALX)
Who owns Calix Inc (CALX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 90.5% of the shares are freely tradable; institutional investors hold 97.3%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 17.49 | 11,153,403 | -2.7 | 03/31/2026 |
| Vanguard Group Inc | 13.02 | 8,302,450 | -2.2 | 12/31/2025 |
| Vanguard Portfolio Management, LLC | 8.68 | 5,533,754 | +0.0 | 03/31/2026 |
| AllianceBernstein L.P. | 5.10 | 3,251,128 | +122.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.21 | 2,686,525 | +0.0 | 03/31/2026 |
| State Street Corp | 4.08 | 2,602,333 | +10.1 | 03/31/2026 |
| Millennium Management LLC | 2.99 | 1,903,972 | +32.0 | 03/31/2026 |
| Congress Asset Management Company, LLP | 2.58 | 1,644,289 | +13.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.73 | 3,655,621 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 2.99 | 1,909,117 | +0.3 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 27. Jul 2026 | Russo Carl | Director | Sell | 75,000 | 36.20 | 2,714,805 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.