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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 Mar 2025
the date the book describes
Filed
21 May 2025
latest of these filings; the earliest 7 May 2025
Managers listing it
5
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 4 listed it in both
Shares listed
3,817,962
combined, among listed positions
Reported value
$135m
combined, at the quarter end

Among the 95 comparable managers: 2 buyers (opened or added shares) and 4 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing CALX in Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

5 of 5 holders

ActionFiling
AllianceBernstein LP2,509,223$89munder 0.1%Added+270,39715 May 2025 (the filing on sec.gov)
Artisan Partners LP1,052,214$37m0.06%Trimmed-57,89114 May 2025 (the filing on sec.gov)
Acadian Asset Management LLC183,627$6.5munder 0.1%Addedn.a.21 May 2025 (the filing on sec.gov)
PDT Partners LLC37,535$1.3m0.09%Trimmed-19,81915 May 2025 (the filing on sec.gov)
Winton Group Ltd35,363$1.3m0.08%Trimmed-20615 May 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2024 to Q1 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 (0)

No new position among listed positions.

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 →