How many institutional investors hold CALX?

3 tracked institutional investors disclosed a position in CALX (CALIX INC) in their most recent 13F filing.

Who is the largest institutional holder of CALX?

Izzy Englander, Millennium Management, holds the largest disclosed position in CALX, valued at $121M.

Where does this CALX ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

CALX — CALIX INC

Name: CALIX INC (CALX) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying CALX?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence

Institutional Conviction

Strong distribution · 1 buying vs 3 selling last quarter

Macro Tailwind

Macro conditions are mixed for this sector

Why? — Evidence & Confidence ▾

Of 4 tracked investors who changed their CALX position last quarter, 1 bought and 3 sold (25% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 56/100 in a Overheat regime).

Supporting evidence

+1 tracked investor added or increased positions last quarter (Paul Tudor Jones)
+3 tracked investors reported holding CALX at their latest filing
+Macro Health is 56/100 in a Overheat regime — historically acceptable for this sectorsource

Contradicting evidence — always shown

−3 tracked investors reduced or exited last quarter (1 reduced, 2 sold out)
−13F data is disclosed up to 45 days after quarter end — positions may have changed since

Know the limits

· 13F disclosure lag (up to 45 days)
· Tracked investors are a sample, not the whole market
· Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/18/2026.

About CALIX INC (CALX)

CALIX INC (CALX) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Izzy Englander (Millennium Management), valued at $121M. Across recent filings, tracked investors recorded 6 new positions, 11 increased, 6 reduced, and 5 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in CALX

/100

Institutional Accumulation

Added / Increased17

Reduced6

Exited5

BearishBullish

Crowded Trade Score™

How many top investors track CALX

/100

Emerging Interest

3investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

CALX Ownership Composition

How CALIX INC is held across tracked investor types, based on reported 13F positions.

Dominant Type

Multi-Strategy / Quant

93% of tracked value

Institutions

tracked investors

Total Reported

$77.9M

combined 13F value

Multi-Strategy / Quant93.2%
Macro6.8%

Multi-Strategy / Quant(2)

93.2%

Macro(1)

6.8%

Tracked investors currently reporting CALX

2 tracked investors have since exited this position — listed separately below.

Investor	Firm	Shares	Market value	% of portfolio	As of
Izzy Englander	Millennium Management	698.6K	$26.1M	0.01%	Jun 30, 2026
Ken Griffin	Citadel Advisors	1.2M	$46.6M	0.01%	Jun 30, 2026
Paul Tudor Jones	Tudor Investment Corp	142.6K	$5.3M	0.01%	Jun 30, 2026

Izzy EnglanderJun 30, 2026
Millennium Management
Shares
698.6K
Value
$26.1M
% Portfolio
0.01%
Ken GriffinJun 30, 2026
Citadel Advisors
Shares
1.2M
Value
$46.6M
% Portfolio
0.01%
Paul Tudor JonesJun 30, 2026
Tudor Investment Corp
Shares
142.6K
Value
$5.3M
% Portfolio
0.01%

Previously held CALX

These investors reported CALX in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

Investor	Firm	Last reported shares	Value then	Last held
Steve Cohen	Point72 Asset Management	513.8K	$25.2M	Mar 31, 2026
Ray Dalio	Bridgewater Associates	65.5K	$3.5M	Dec 31, 2025

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	Increased	535.21%	$44.3M	Nov 14, 2024
Izzy Englander	Increased	77.85%	$70.8M	Feb 14, 2025
Izzy Englander	Reduced	-13.11%	$62.6M	May 15, 2025
Izzy Englander	Increased	27.31%	$119.5M	Aug 14, 2025
Izzy Englander	Reduced	-26.62%	$76.3M	Feb 17, 2026
Izzy Englander	Increased	32.05%	$93.3M	May 15, 2026
Izzy Englander	Reduced	-63.31%	$26.1M	Aug 14, 2026
Ken Griffin	New	—	$12.5M	Nov 14, 2024
Ken Griffin	Reduced	-19.47%	$5M	May 15, 2025
Ken Griffin	Sold	-100.00%	$0	Aug 14, 2025
Ken Griffin	Sold	-100.00%	$0	Aug 14, 2026
Ray Dalio	New	—	$2.2M	Nov 13, 2025
Ray Dalio	Increased	82.58%	$3.5M	Feb 13, 2026
Ray Dalio	Sold	-100.00%	$0	May 15, 2026
Steve Cohen	New	—	$285K	Jul 21, 2025
Steve Cohen	Increased	1918.63%	$8.6M	Aug 14, 2025
Steve Cohen	Sold	-100.00%	$0	Nov 14, 2025
Steve Cohen	New	—	$25.2M	May 15, 2026
Steve Cohen	Sold	-100.00%	$0	Aug 14, 2026
Paul Tudor Jones	New	—	$4.6M	Aug 14, 2024
Paul Tudor Jones	Reduced	-67.23%	$1.6M	Nov 14, 2024
Paul Tudor Jones	Increased	256.96%	$5.3M	Feb 14, 2025
Paul Tudor Jones	Increased	8.87%	$5.8M	May 15, 2025
Paul Tudor Jones	Increased	27.60%	$11.2M	Aug 14, 2025
Paul Tudor Jones	Increased	38.08%	$17.8M	Dec 9, 2025
Paul Tudor Jones	Reduced	-47.96%	$3.2M	May 15, 2026
Paul Tudor Jones	Increased	120.13%	$5.3M	Aug 14, 2026
Izzy Englander	New	—	$3.4M	May 15, 2024

Izzy Englander
Increased
$44.3M(535.21%)Nov 14, 2024
Izzy Englander
Increased
$70.8M(77.85%)Feb 14, 2025
Izzy Englander
Reduced
$62.6M(-13.11%)May 15, 2025
Izzy Englander
Increased
$119.5M(27.31%)Aug 14, 2025
Izzy Englander
Reduced
$76.3M(-26.62%)Feb 17, 2026
Izzy Englander
Increased
$93.3M(32.05%)May 15, 2026
Izzy Englander
Reduced
$26.1M(-63.31%)Aug 14, 2026
Ken Griffin
New
$12.5MNov 14, 2024
Ken Griffin
Reduced
$5M(-19.47%)May 15, 2025
Ken Griffin
Sold
$0(-100.00%)Aug 14, 2025
Ken Griffin
Sold
$0(-100.00%)Aug 14, 2026
Ray Dalio
New
$2.2MNov 13, 2025
Ray Dalio
Increased
$3.5M(82.58%)Feb 13, 2026
Ray Dalio
Sold
$0(-100.00%)May 15, 2026
Steve Cohen
New
$285KJul 21, 2025
Steve Cohen
Increased
$8.6M(1918.63%)Aug 14, 2025
Steve Cohen
Sold
$0(-100.00%)Nov 14, 2025
Steve Cohen
New
$25.2MMay 15, 2026
Steve Cohen
Sold
$0(-100.00%)Aug 14, 2026
Paul Tudor Jones
New
$4.6MAug 14, 2024
Paul Tudor Jones
Reduced
$1.6M(-67.23%)Nov 14, 2024
Paul Tudor Jones
Increased
$5.3M(256.96%)Feb 14, 2025
Paul Tudor Jones
Increased
$5.8M(8.87%)May 15, 2025
Paul Tudor Jones
Increased
$11.2M(27.60%)Aug 14, 2025
Paul Tudor Jones
Increased
$17.8M(38.08%)Dec 9, 2025
Paul Tudor Jones
Reduced
$3.2M(-47.96%)May 15, 2026
Paul Tudor Jones
Increased
$5.3M(120.13%)Aug 14, 2026
Izzy Englander
New
$3.4MMay 15, 2024

Frequently asked questions

How many institutional investors hold CALX?: 3 tracked institutional investors disclosed a position in CALX (CALIX INC) in their most recent 13F filing.
Who is the largest institutional holder of CALX?: Izzy Englander, Millennium Management, holds the largest disclosed position in CALX, valued at $121M.
Did institutional ownership of CALX increase or decrease?: Across recent 13F filings, tracked investors recorded 6 new positions, 11 increased, 6 reduced, and 5 fully exited CALX.
Where does this CALX ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.