Calix, Inc (CALX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

71,172,727Shares Outstanding

915,402Shares held by institutions

$47,884,679Value of institutional holdings

79.31%Institutional ownership %

8.12%Shares Changed QoQ

307No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

The institutional landscape for Calix, Inc (NYSE:CALX) includes 307 filers as of the latest reporting cycle ending December 2025.

These investors collectively held 79.3% of the company's total shares outstanding in December 2025, down from 79.6% in September 2025.
Quarterly data indicates a 8.12% shift in institutional share volume, and the annual owner count reflects an increase of 21.34%.
During the quarter, 175 institutions bought more Calix shares, 90 sold shares, and 42 of the 307 total investors held their position steady.
This class of investors increased its holdings in Calix to 56.44Mn shares for the 13F-cycle ending December 2025, up by 4.24Mn shares quarter on quarter, and down 1.20Mn shares year over year.
BlackRock, Inc.'s holding of 11.46Mn shares as of December 31, 2025 makes it the primary institutional investor in Calix, owning 16.11% of the stock.
Among the most significant buyers of Calix during December 2025 were FULLER & THALER ASSET MANAGEMENT, INC. (1.09Mn), WESTFIELD CAPITAL MANAGEMENT CO LP (461.20K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (387.82K), Alyeska Investment Group, L.P. (375.13K), Trexquant Investment LP (298.06K).
Leading sellers of Calix stock in December 2025 included MILLENNIUM MANAGEMENT LLC (523.01K), UBS Group AG (448.72K), BlackRock, Inc. (255.31K), Assenagon Asset Management S.A. (208.46K), VANGUARD GROUP INC (186.63K).
The top 10 institutional holders of Calix for the quarter ending December 2025 included BlackRock, Inc. (11.46Mn), VANGUARD GROUP INC (8.30Mn), STATE STREET CORP (2.36Mn), ALLIANCEBERNSTEIN L.P. (1.46Mn), CONGRESS ASSET MANAGEMENT CO (1.45Mn), GEODE CAPITAL MANAGEMENT, LLC (1.45Mn), MILLENNIUM MANAGEMENT LLC (1.44Mn), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (1.28Mn), WESTFIELD CAPITAL MANAGEMENT CO LP (1.15Mn), FULLER & THALER ASSET MANAGEMENT, INC. (1.09Mn).

307 Institutional Holders

915,402 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	11,462,941	-255,312	-2.18%	$606,733,495.00
VANGUARD GROUP INC	31 Dec, 2025	8,302,450	-186,628	-2.20%	$439,448,678.00
STATE STREET CORP	31 Dec, 2025	2,362,965	23,022	0.98%	$125,071,737.00
ALLIANCEBERNSTEIN L.P.	31 Dec, 2025	1,462,371	52,642	3.73%	$77,403,297.00
CONGRESS ASSET MANAGEMENT CO	31 Dec, 2025	1,447,545	-15,657	-1.07%	$76,618,557.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,445,338	74,235	5.41%	$76,512,937.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	1,441,912	-523,006	-26.62%	$76,320,402.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	1,277,505	3,079	0.24%	$67,618,340.00
WESTFIELD CAPITAL MANAGEMENT CO LP	31 Dec, 2025	1,145,292	461,196	67.42%	$60,620,306.00
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	1,094,173	1,094,173	0.00%	$57,914,592.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	1,030,115	191,001	22.76%	$54,497.00
LORD, ABBETT & CO. LLC	31 Dec, 2025	987,431	91,175	10.17%	$52,265.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	948,619	2,754	0.29%	$50,209,915.00
LOOMIS SAYLES & CO L P	31 Dec, 2025	789,892	172,879	28.02%	$41,808,984.00
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31 Dec, 2025	765,415	18,276	2.45%	$40,513,475.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	673,045	-4,771	-0.70%	$35,624,272.00
PARADIGM CAPITAL MANAGEMENT INC/NY	31 Dec, 2025	672,400	0	0.00%	$35,590,132.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	639,729	-19,734	-2.99%	$33,860,857.00
MORGAN STANLEY	31 Dec, 2025	622,875	60,993	10.86%	$32,968,864.00
NORTHERN TRUST CORP	31 Dec, 2025	595,626	-17,226	-2.81%	$31,526,485.00

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