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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $2.75B 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 $546.41M in its March 31, 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 $400.41M, representing an estimated loss of -26.72% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 58% 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
294
Total Reported Value
$2.75B
Largest Holder
Blackrock, Inc.
Largest Position
$546.41M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
49
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% | 11,153,403 | $546,405,187 | $400,407,168 | -$145,998,019 | -26.72% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,533,754 | $271,098,608 | $198,661,769 | -$72,436,839 | -26.72% | |
| Alliancebernstein L.P. | 0.06% | 3,251,128 | $172,082,205 | $116,715,495 | -$55,366,710 | -32.17% | |
| Vanguard Capital Management Llc | 0.00% | 2,686,525 | $131,612,860 | $96,446,248 | -$35,166,613 | -26.72% | |
| State Street Corp | 0.00% | 2,602,333 | $127,636,048 | $93,423,755 | -$34,212,293 | -26.80% | |
| Millennium Management Llc | 0.07% | 1,903,972 | $93,275,588 | $68,352,595 | -$24,922,993 | -26.72% | |
| Westfield Capital Management Co Lp | 0.32% | 1,546,101 | $75,743,488 | $55,505,026 | -$20,238,462 | -26.72% | |
| Geode Capital Management, Llc | 0.00% | 1,435,706 | $70,348,327 | $51,541,845 | -$18,806,482 | -26.73% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,218,495 | $59,698,564 | $43,743,971 | -$15,954,594 | -26.73% | |
| Loomis Sayles & Co L P | 0.06% | 840,197 | $41,161,251 | $30,163,072 | -$10,998,179 | -26.72% | |
| Gilder Gagnon Howe & Co Llc | 0.46% | 779,092 | $38,167,717 | $27,969,403 | -$10,198,314 | -26.72% | |
| Paradigm Capital Management Inc/Ny | 1.44% | 768,200 | $37,634,118 | $27,578,380 | -$10,055,738 | -26.72% | |
| Bank Of America Corp | 0.00% | 750,117 | $36,748,232 | $26,929,200 | -$9,819,032 | -26.72% | |
| Morgan Stanley | 0.00% | 712,213 | $34,891,392 | $25,568,447 | -$9,322,945 | -26.72% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.05% | 696,855 | $34,139,311 | $25,017,095 | -$9,122,217 | -26.72% | |
| Charles Schwab Investment Management Inc | 0.01% | 681,954 | $33,408,926 | $24,482,149 | -$8,926,777 | -26.72% | |
| Ubs Group Ag | 0.01% | 645,245 | $31,610,553 | $23,164,296 | -$8,446,258 | -26.72% | |
| Northern Trust Corp | 0.00% | 609,742 | $29,871,261 | $21,889,738 | -$7,981,523 | -26.72% | |
| Harvey Partners, Llc | 2.28% | 572,500 | $28,046,775 | $20,552,750 | -$7,494,025 | -26.72% | |
| Nomura Asset Management International Inc. | 0.05% | 556,995 | $27,287,000 | $19,996,121 | -$7,290,880 | -26.72% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 551,150 | $27,000,839 | $19,786,285 | -$7,214,554 | -26.72% | |
| Renaissance Technologies LLC | Jim Simons | 0.04% | 543,418 | $26,622,048 | $19,508,706 | -$7,113,342 | -26.72% |
| Wellington Management Group Llp | 0.00% | 534,517 | $26,185,988 | $19,189,160 | -$6,996,828 | -26.72% | |
| Artisan Partners Limited Partnership | 0.04% | 529,875 | $25,958,576 | $19,022,513 | -$6,936,064 | -26.72% | |
| Point72 Asset Management, L.P. | 0.04% | 513,814 | $25,171,748 | $18,445,923 | -$6,725,825 | -26.72% | |
| Squarepoint Ops Llc | 0.05% | 458,802 | $22,476,710 | $16,470,992 | -$6,005,718 | -26.72% | |
| Nuveen, Llc | 0.01% | 432,944 | $21,209,926 | $15,542,690 | -$5,667,236 | -26.72% | |
| Trexquant Investment Lp | 0.15% | 429,367 | $21,034,689 | $15,414,275 | -$5,620,414 | -26.72% | |
| Citadel Advisors Llc | 0.01% | 428,198 | $20,977,420 | $15,372,308 | -$5,605,112 | -26.72% | |
| Vanguard Fiduciary Trust Co | 0.01% | 418,439 | $20,499,327 | $15,021,960 | -$5,477,367 | -26.72% | |
| Principal Financial Group Inc | 0.01% | 395,333 | $19,367,363 | $14,192,455 | -$5,174,908 | -26.72% | |
| Bank Of New York Mellon Corp | 0.00% | 387,460 | $18,981,665 | $13,909,814 | -$5,071,851 | -26.72% | |
| Penn Capital Management Company, Llc | 1.44% | 378,564 | $18,590,822 | $13,590,448 | -$5,000,374 | -26.90% | |
| Jane Street Group, Llc | 0.02% | 351,945 | $17,241,786 | $12,634,826 | -$4,606,961 | -26.72% | |
| Divisar Capital Management Llc | 4.25% | 340,163 | $16,664,585 | $12,211,852 | -$4,452,733 | -26.72% | |
| Oberweis Asset Management Inc/ | 0.48% | 335,030 | $16,413,120 | $12,027,577 | -$4,385,543 | -26.72% | |
| Federated Hermes, Inc. | 0.03% | 317,138 | $15,536,591 | $11,385,254 | -$4,151,337 | -26.72% | |
| Metlife Investment Management, Llc | 0.08% | 312,407 | $15,304,819 | $11,215,411 | -$4,089,408 | -26.72% | |
| Goldman Sachs Group Inc | 0.00% | 307,468 | $15,062,857 | $11,038,101 | -$4,024,756 | -26.72% | |
| Divisadero Street Capital Management, Lp | 0.70% | 305,670 | $14,974,773 | $10,973,553 | -$4,001,220 | -26.72% | |
| Rockefeller Capital Management L.P. | 0.03% | 299,587 | $14,676,767 | $10,755,173 | -$3,921,594 | -26.72% | |
| Man Group Plc | 0.03% | 280,313 | $13,732,534 | $10,063,237 | -$3,669,297 | -26.72% | |
| Schroder Investment Management Group | 0.01% | 277,852 | $13,725,889 | $9,974,887 | -$3,751,002 | -27.33% | |
| Invesco Ltd. | 0.00% | 272,851 | $13,366,970 | $9,795,351 | -$3,571,619 | -26.72% | |
| Sei Investments Co | 0.01% | 269,320 | $13,194,009 | $9,668,588 | -$3,525,421 | -26.72% | |
| Deutsche Bank Ag\ | 0.00% | 253,023 | $12,395,597 | $9,083,526 | -$3,312,071 | -26.72% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.03% | 224,502 | $10,998,353 | $8,059,622 | -$2,938,731 | -26.72% | |
| Jacobs Levy Equity Management, Inc | 0.05% | 221,882 | $10,869,999 | $7,965,564 | -$2,904,435 | -26.72% | |
| Public Sector Pension Investment Board | 0.03% | 215,809 | $10,572,483 | $7,747,543 | -$2,824,940 | -26.72% | |
| Qube Research & Technologies Ltd | 0.01% | 211,036 | $10,338,654 | $7,576,192 | -$2,762,462 | -26.72% |
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.