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CALX in the 13F filings

Calix Inc · CUSIP 13100M509

Sector · Communications and media
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
32
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 8 listed it in both
Shares listed
9,818,048
combined, among listed positions
Reported value
$520m
combined, at the quarter end

Among the 92 comparable managers: 20 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -815,663.

Managers listing CALX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

32 of 32 holders

ActionFiling
AllianceBernstein LP1,462,371$77munder 0.1%Added+52,64217 Feb 2026 (the filing on sec.gov)
Millennium Management LLC1,441,912$76munder 0.1%Trimmed-523,00617 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,277,505$68munder 0.1%Added+3,07913 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC1,030,115$54m0.09%Added+191,00110 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc688,186$36munder 0.1%Trimmed-545,04017 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP639,729$34munder 0.1%Trimmed-19,73417 Feb 2026 (the filing on sec.gov)
Artisan Partners LP590,187$31munder 0.1%Trimmed-120,01017 Feb 2026 (the filing on sec.gov)
Invesco Ltd577,771$31munder 0.1%Added+95,73819 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC463,618$25munder 0.1%Added+202,80012 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC253,237$13munder 0.1%Added+31,04627 Oct 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP196,862$10m0.08%Newnew17 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC165,390$8.8munder 0.1%Added+135,35317 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC127,775$6.8munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp124,516$6.6munder 0.1%Trimmed-165,67317 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)123,540$6.5munder 0.1%Added+52,80317 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC122,909$6.5munder 0.1%Trimmed-22,61412 Feb 2026 (the filing on sec.gov)
Man Group PLC114,307$6.0munder 0.1%Added+51,34317 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP65,536$3.5munder 0.1%Added+29,64213 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC45,841$2.4munder 0.1%Trimmed-19,86417 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.38,704$2.0munder 0.1%Trimmed-3,90617 Feb 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP37,697$2.0munder 0.1%Added+11,44217 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC37,506$2.0munder 0.1%Added+14,01513 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC36,829$1.9munder 0.1%Trimmed-12,77917 Feb 2026 (the filing on sec.gov)
Caxton Associates LLP29,967$1.6munder 0.1%Trimmed-4,00713 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd27,234$1.4munder 0.1%Held017 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (4)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

0358102015201720192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CALX by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20131$572kn.a.n.a.
Q4 20141$688kn.a.n.a.
Q1 20151$1.7mn.a.n.a.
Q2 20151$11mn.a.n.a.
Q3 20151$2.8mn.a.n.a.
Q2 20161$303kn.a.n.a.
Q3 20162$1.9mn.a.n.a.
Q4 20161$490kn.a.n.a.
Q1 20172$1.8mn.a.n.a.
Q2 20172$2.9mn.a.n.a.
Q3 20171$1.3mn.a.n.a.
Q3 20181$216kn.a.n.a.
Q4 20181$386kn.a.n.a.
Q1 20192$4.7mn.a.n.a.
Q2 20192$3.8mn.a.n.a.
Q4 20191$4.6mn.a.n.a.
Q1 20202$6.3mn.a.n.a.
Q2 20203$57mn.a.n.a.
Q3 20204$94mn.a.n.a.
Q4 20204$147mn.a.n.a.
Q1 20216$221mn.a.n.a.
Q2 20215$263mn.a.n.a.
Q3 20217$265mn.a.n.a.
Q4 20215$647mn.a.n.a.
Q1 20226$238mn.a.n.a.
Q2 20224$167mn.a.n.a.
Q3 20226$229mn.a.n.a.
Q4 20227$258mn.a.n.a.
Q1 202310$298mn.a.n.a.
Q2 20239$232mn.a.n.a.
Q3 20238$198mn.a.n.a.
Q4 20237$292m62
Q1 20248$230m62
Q2 20247$276m52
Q3 20245$252m15
Q4 20245$120m14
Q1 20255$135m24
Q2 20254$196m31
Q3 20259$435m63
Q4 20258$246m2012
Q1 20266$333m1618
Q2 20263$207m218

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

CALX and NFLX →CALX and TMUS →CALX and CMCSA →Choose a stock to compare with CALX →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own CALX, latest filings →Back to the 13F Explorer →