CALIX INC (CALX) Institutional Shareholders
CALIX INC (CALX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $2.27B in CALX holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of CALX tracked by InsiderSet, reporting ownership valued at approximately $439.46M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $417.32M, representing an estimated loss of -5.04% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 55% of the total disclosed CALX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Alliancebernstein L.P., and several other long-term asset managers with concentrated positions in CALIX INC (CALX).
This page ranks the largest institutional CALX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
276
Total Reported Value
$2.27B
Largest Holder
Blackrock, Inc.
Largest Position
$439.46M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
38
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 11,775,490 | $439,461,286 | $417,323,366 | -$22,137,920 | -5.04% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,588,048 | $208,545,951 | $198,040,421 | -$10,505,530 | -5.04% | |
| Alliancebernstein L.P. | 0.05% | 3,248,412 | $159,139,704 | $115,123,721 | -$44,015,983 | -27.66% | |
| State Street Corp | 0.00% | 2,915,560 | $108,794,967 | $103,327,446 | -$5,467,521 | -5.03% | |
| Vanguard Capital Management Llc | 0.00% | 2,587,424 | $96,562,664 | $91,698,307 | -$4,864,357 | -5.04% | |
| Geode Capital Management, Llc | 0.00% | 1,481,595 | $55,302,936 | $52,507,727 | -$2,795,209 | -5.05% | |
| Westfield Capital Management Co Lp | 0.16% | 1,324,534 | $49,431,609 | $46,941,485 | -$2,490,124 | -5.04% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,309,436 | $48,861,723 | $46,406,412 | -$2,455,311 | -5.03% | |
| Acadian Asset Management Llc | 0.05% | 1,241,622 | $46,315,000 | $44,003,084 | -$2,311,916 | -4.99% | |
| Citadel Advisors Llc | 0.03% | 1,208,764 | $45,111,072 | $42,838,596 | -$2,272,476 | -5.04% | |
| Paradigm Capital Management Inc/Ny | 1.01% | 997,134 | $37,213,041 | $35,338,429 | -$1,874,612 | -5.04% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 875,837 | $32,686,237 | $31,039,663 | -$1,646,574 | -5.04% | |
| Ubs Group Ag | 0.01% | 857,360 | $31,996,676 | $30,384,838 | -$1,611,838 | -5.04% | |
| Loomis Sayles & Co L P | 0.04% | 784,798 | $29,288,661 | $27,813,241 | -$1,475,420 | -5.04% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.03% | 753,302 | $28,111,916 | $26,697,023 | -$1,414,893 | -5.03% | |
| Jane Street Group, Llc | 0.02% | 718,768 | $26,824,421 | $25,473,138 | -$1,351,283 | -5.04% | |
| Two Sigma Investments, Lp | 0.02% | 703,911 | $26,269,959 | $24,946,606 | -$1,323,353 | -5.04% | |
| Millennium Management Llc | 0.02% | 698,620 | $26,072,498 | $24,759,093 | -$1,313,405 | -5.04% | |
| Charles Schwab Investment Management Inc | 0.00% | 696,967 | $26,010,808 | $24,700,510 | -$1,310,298 | -5.04% | |
| Nomura Asset Management International Inc. | 0.04% | 659,563 | $24,615,000 | $23,374,913 | -$1,240,087 | -5.04% | |
| Northern Trust Corp | 0.00% | 642,151 | $23,965,076 | $22,757,831 | -$1,207,245 | -5.04% | |
| Gilder Gagnon Howe & Co Llc | 0.22% | 580,323 | $21,657,654 | $20,566,647 | -$1,091,007 | -5.04% | |
| Bank Of America Corp | 0.00% | 560,034 | $20,900,469 | $19,847,605 | -$1,052,864 | -5.04% | |
| Renaissance Technologies LLC | Jim Simons | 0.03% | 548,118 | $20,455,764 | $19,425,302 | -$1,030,462 | -5.04% |
| Morgan Stanley | 0.00% | 524,882 | $19,588,637 | $18,601,818 | -$986,819 | -5.04% | |
| Wellington Management Group Llp | 0.00% | 519,153 | $19,374,789 | $18,398,782 | -$976,007 | -5.04% | |
| Hrt Financial Lp | 0.04% | 517,152 | $19,300,000 | $18,327,867 | -$972,133 | -5.04% | |
| Rockefeller Capital Management L.P. | 0.03% | 466,594 | $17,413,287 | $16,536,091 | -$877,196 | -5.04% | |
| Trigran Investments, Inc. | 3.03% | 442,008 | $16,495,738 | $15,664,764 | -$830,974 | -5.04% | |
| Harvey Partners, Llc | 1.09% | 420,500 | $15,693,060 | $14,902,520 | -$790,540 | -5.04% | |
| Vanguard Fiduciary Trust Co | 0.00% | 417,114 | $15,566,694 | $14,782,520 | -$784,174 | -5.04% | |
| D. E. Shaw & Co., Inc. | 0.01% | 409,082 | $15,266,940 | $14,497,866 | -$769,074 | -5.04% | |
| Oberweis Asset Management Inc/ | 0.31% | 402,230 | $15,011,224 | $14,255,031 | -$756,193 | -5.04% | |
| Alyeska Investment Group, L.P. | 0.04% | 400,088 | $14,931,284 | $14,179,119 | -$752,165 | -5.04% | |
| Divisar Capital Management Llc | 3.40% | 395,163 | $14,747,483 | $14,004,577 | -$742,906 | -5.04% | |
| Principal Financial Group Inc | 0.01% | 393,019 | $14,667,469 | $13,928,593 | -$738,876 | -5.04% | |
| Penn Capital Management Company, Llc | 0.92% | 388,239 | $14,515,002 | $13,759,190 | -$755,812 | -5.21% | |
| Nuveen, Llc | 0.00% | 366,953 | $13,694,687 | $13,004,814 | -$689,873 | -5.04% | |
| Mackenzie Financial Corp | 0.01% | 323,524 | $12,073,916 | $11,465,691 | -$608,225 | -5.04% | |
| Federated Hermes, Inc. | 0.02% | 322,879 | $12,049,844 | $11,442,832 | -$607,012 | -5.04% | |
| Bank Of New York Mellon Corp | 0.00% | 321,827 | $12,010,571 | $11,405,549 | -$605,022 | -5.04% | |
| Man Group Plc | 0.02% | 317,967 | $11,866,528 | $11,268,750 | -$597,778 | -5.04% | |
| Invesco Ltd. | 0.00% | 313,311 | $11,692,766 | $11,103,742 | -$589,024 | -5.04% | |
| Goldman Sachs Group Inc | 0.00% | 304,086 | $11,348,490 | $10,776,808 | -$571,682 | -5.04% | |
| Trexquant Investment Lp | 0.07% | 299,603 | $11,181,184 | $10,617,930 | -$563,254 | -5.04% | |
| Needham Investment Management Llc | 0.31% | 275,000 | $10,263,000 | $9,746,000 | -$517,000 | -5.04% | |
| Qube Research & Technologies Ltd | 0.01% | 269,329 | $10,051,358 | $9,545,020 | -$506,338 | -5.04% | |
| Deutsche Bank Ag\ | 0.00% | 266,222 | $9,935,405 | $9,434,908 | -$500,497 | -5.04% | |
| Fmr Llc | 0.00% | 263,002 | $9,815,217 | $9,320,791 | -$494,426 | -5.04% | |
| New York State Common Retirement Fund | 0.01% | 250,462 | $9,347,242 | $8,876,373 | -$470,869 | -5.04% |
Frequently asked questions about CALX
Who owns the most CALX stock?
The largest holders of CALX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CALIX INC (CALX).
Is CALX widely held by superinvestors?
Many widely followed stocks like CALX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CALX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.