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CALX · Calix, Inc · Holdings

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$38.30 +0.62 (+1.65%) At close · Oct 27 Q1 2026 earnings call transcript
Market Cap
$2.41B
Shares
62.96M
Volume · Oct 27 1.13M Avg daily vol (3M) 973.85K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 288
Total Value: $2,269,677,550
Total Shares: 60,935,833
Showing 1–100 of 293 holdings by value · page 1 of 3

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 287 13F filers
Top Holder
19.6%
Sep 2023 → Jun 2026 · range 15.2% – 20.6%
of institutional value
Top 5
43.5%
Sep 2023 → Jun 2026 · range 37.9% – 49.2%
of institutional value
Top 10
54.5%
Sep 2023 → Jun 2026 · range 51.0% – 61.5%
of institutional value
HHI
601
Sep 2023 → Jun 2026 · range 485 – 744
Broadly held

Who Holds CALX

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 287 filers, like-for-like change +0.4%; actively managed books -0.6%; index-like books +2.1%.

Holder type Share Filers Change
Registered adviser 50.7% 147 -7.1%
Exempt adviser 0.7% 4 +52.5%
Adviser 2.5% 7 +10.3%
Bank 9.4% 16 +8.9%
Insurer 0.8% 2 -4.3%
Broker-dealer 0.1% 2 -2.6%
Benefit plan 0.2% 5 -21.7%
Non-US 1.6% 12 +43.5%
Holding company 22.7% 9 +2.4%
Registered fund 0.0% 0 —
Unknown 11.3% 83 +23.1%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

287 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
0
0.000% of filers hold it in their top 10
Mar 31, 2026: 0
Holders above 5%
0
median weight 0.003%
Mar 31, 2026: 0
Crowding
32.3%
of shares outstanding, 85th percentile
Mar 31, 2026: 29.8%
Private-fund advisers
29.0%
of shares outstanding
Institutional ownership
93.9%
103.9% of the estimated free float above 100%: filers can report lent or client shares more than once
Top 10 holders
54.5%
of 13F shares, Herfindahl 0.060
Active holders
-0.6%
like-for-like share change of active filers
5% stakes on record
5
0 13D, 5 13G (4 institutional, 0 passive, 1 exempt)
How long holders have held it value-weighted 12.8 quarters
Under 1 year 21.9% 1 to 3 years 39.1% 3 years or more 39.0% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$46.03
estimated per share
Mar 31, 2026: $47.92
Quarter-end price
$37.32
implied by 13F values
Estimated gain or loss
-18.9%
price against the estimated cost
Estimated at a loss
94.7%
of costed 13F value

Estimated cost covers 33.5% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies CALX's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 THRM Gentherm Inc 4
2 MTRX Matrix Service Co 3
3 ARLO Arlo Technologies, Inc. 4
4 BV BrightView Holdings, Inc. 3
5 KRNT Kornit Digital Ltd. 3
6 VPG Vishay Precision Group, Inc. 3
7 CECO Ceco Environmental Corp 5
8 LASR Nlight, Inc. 4
9 ATEC Alphatec Holdings, Inc. 3
10 DCO Ducommun Inc 3

Shareholder Targets

13F filers that own its peers but not CALX, quarter ended Jun 30, 2026

Found through its holder-overlap peers: THRM, MTRX, ARLO, BV, KRNT, VPG, CECO, LASR, ATEC, DCO, AGYS, UCTT, TTI, PDFS, LGN, GENI, VIAV, SXT, NVMI, FN. 1,311 filers in all.

# Filer In peers
1 Blackstone Inc. Adviser, Concentrated $1,660,480,265 3 held
2 Capital World Investors Adviser, Diversified active $1,468,048,368 5 held
3 Harel Insurance Investments & Financial Services Ltd. Unknown, Diversified active $1,154,004,310 1 held
4 T. Rowe Price Investment Management, Inc. Adviser, Diversified active $1,002,869,424 8 held
5 Migdal Insurance & Financial Holdings Ltd. Holding company, Concentrated $879,919,511 1 held
6 Whale Rock Capital Management LLC Registered adviser, Diversified active $746,943,741 2 held
7 WASATCH ADVISORS LP Registered adviser, Diversified active $697,384,643 6 held
8 MENORA MIVTACHIM HOLDINGS LTD. Unknown, Diversified active $654,749,263 1 held
9 Clal Insurance Enterprises Holdings Ltd Unknown, Concentrated $654,712,343 1 held
10 NORGES BANK Non-US, Index-like $639,447,844 8 held

Fund Ownership of CALX by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 32.47% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 4.58% 2,886,081
Index ETFs 27.89% 17,559,505
Active ETFs 1.16% 733,099
Active funds 13.77% 8,670,294
Unclassified 0.43% 269,919
All registered funds 47.84% 30,118,898
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Showing 100 of 293
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Holder Value (USD) % of 13F Shares Open

Showing the top 100 of 293 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1406666 CUSIP 13100M509 13F (30d) 53 filings 50 filers Visit website Investor relations