Free · no sign-up · Q2 2026

Which funds own QLYS

Qualys Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $77m between them. It is among the largest positions of fewer than a fifth of the current managers on file. Buying and selling roughly cancelled this quarter, which is what a name looks like when the argument is still live.

Managers holding: 2; at least, of 91 current
Combined value: $77m; as reported
Opened: 0; new this quarter
Added to: 2; already held
Trimmed or sold out: 1; 1 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Acadian Asset Management LLC Quantitative · $84.2bn book	$75m	0.1%	542,279	+$59m+360,172	Added
Caxton Associates LLP Macro · $5.3bn book	$2.8m	0.1%	20,684	+$1.6m+6,171	Added

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Quantbot Technologies LP · Quantitative$1.5m held before

Ownership through time

At least 9 of the 95 managers whose filings are on file listed QLYS in Q2 2026, against 1 in Q2 2013. 3 managers more than in Q1 2026: 1 started a position; 4 listed it again; 2 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

Holocene Advisors LP$4.8m

Largest increases, by shares

Acadian Asset Management LLC182,107 to 542,279 shares+$50m
Arrowstreet Capital LP832,796 to 985,345 shares+$21m
Holocene Advisors LPnew: 35,038 shares+$4.8m
Caxton Associates LLP14,513 to 20,684 shares+$848k

Largest decreases, by shares

Renaissance Technologies LLC497,600 to 284,100 shares-$29m

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
AQR Capital Management LLC	Q1 2022	$191m	$191m
Arrowstreet Capital LP	Q1 2018	$135m	$135m
Millennium Management LLC	Q2 2026	$105m	$105m
Acadian Asset Management LLC	Q3 2022	$75m	$75m
Renaissance Technologies LLC	Q1 2017	$110m	$39m
Freestone Grove Partners LP	Q2 2026	$9.5m	$9.5m
Holocene Advisors LP	Q4 2018	$12m	$4.8m
Caxton Associates LLP	Q1 2020	$2.8m	$2.8m
Winton Group Ltd	Q3 2017	$6.5m	$1.7m
Neuberger Berman Group LLC	Q3 2016	$381m	last listed Q4 2025
Squarepoint Ops LLC	Q2 2020	$50m	last listed Q2 2024
Two Sigma Advisers LP	Q1 2020	$47m	last listed Q2 2025
Two Sigma Investments LP	Q3 2015	$39m	last listed Q2 2024
Elliott Investment Management LP	Q2 2016	$39m	last listed Q2 2016
Marshall Wace LLP	Q4 2015	$35m	last listed Q4 2024
Tudor Investment Corp	Q1 2015	$29m	last listed Q1 2026
Man Group PLC	Q3 2019	$26m	last listed Q4 2023
Voloridge Investment Management LLC	Q2 2018	$25m	last listed Q1 2025
Bridgewater Associates LP	Q2 2023	$20m	last listed Q4 2024

What QLYS is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around QLYS →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Comps ExplorerValue it against the peers it trades beside Every managerRead any of these books in full Deal tapeWhat buyers paid for whole companies, not slices Hedge fund interviewsHow the room runs, and the stock pitch it wants

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The holdings, every quarter, and the week between

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