Calix, Inc (CALX) Institutional Ownership

Ownership Summary

Calix, Inc (NYSE:CALX) is held by 321 institutional investors per 13F filings through December 2025.

• These investors held 84.0% of outstanding shares in December 2025, up from 82.3% in September 2025.
• They increased total shares held in CALX by 9.5% quarter over quarter, and investors in Calix increased 27.38% from a year ago.
• Activity in CALX broke down as 184 buyers, 95 sellers, and 42 unchanged among 321 total holders.
• Institutional investors collectively held 58.62Mn shares in Calix as of December 2025, up by 5.08Mn shares quarter on quarter, and up 299.78K shares year over year.
• BlackRock, Inc. is the top holder of Calix as of December 31, 2025, with 11.15Mn shares representing 15.98% of outstanding stock.
• The largest buyers of Calix for the quarter ending December 2025 were VANGUARD PORTFOLIO MANAGEMENT LLC (5.53Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.69Mn), ALLIANCEBERNSTEIN L.P. (1.79Mn), GILDER GAGNON HOWE & CO LLC (779.09K), Point72 Asset Management, L.P. (513.81K).
• Top sellers of CALX stock for the quarter ending December 2025 included LORD, ABBETT & CO. LLC (866.19K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (726.36K), Goldman Sachs Group Inc (496.0K), NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO (349.93K), BlackRock, Inc. (309.54K).
• Business Quant data shows the 10 biggest positions in Calix as of December 2025 are held by BlackRock, Inc. (11.15Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (5.53Mn), ALLIANCEBERNSTEIN L.P. (3.25Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.69Mn), State Street Corp (2.6Mn), MILLENNIUM MANAGEMENT LLC (1.9Mn), CONGRESS ASSET MANAGEMENT CO (1.64Mn), WESTFIELD CAPITAL MANAGEMENT CO LP (1.55Mn), GEODE CAPITAL MANAGEMENT, LLC (1.44Mn), DIMENSIONAL FUND ADVISORS LP (1.22Mn).