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Which funds own LAB

Standard Biotools Inc in the Q2 2026 filings. At least 1 of the 91 current managers on file reported a position, worth $48m between them. It is among the largest positions of fewer than a fifth of the current managers on file. The quarter went the other way: 3 managers trimmed or sold out against 0 buying.

Managers holding: 1; at least, of 91 current
Combined value: $48m; as reported
Opened: 0; new this quarter
Added to: 0; already held
Trimmed or sold out: 3; 3 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
Viking Global Investors LP Long/short equity · $35.1bn book	$48m	0.1%	58,651,170	-$5.7m0	Held

Sold out of this quarter

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

AllianceBernstein LP · Long-only$400k held before
T. Rowe Price Associates Inc · Long-only$200k held before
Janus Henderson Group Ltd · Long-only$100k held before

Ownership through time

At least 1 of the 95 managers whose filings are on file listed LAB in Q2 2026, against 1 in Q3 2015. The same number as in Q1 2026.

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

Started in Q2 2026

No manager on file started a position.

Added to it

No manager on file added.

Cut it

No manager on file cut it.

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
Viking Global Investors LP	Q1 2024	$159m	$48m
Neuberger Berman Group LLC	Q3 2018	$69m	last listed Q3 2020
ARK Investment Management LLC	Q1 2024	$35m	last listed Q4 2025
Schonfeld Strategic Advisors LLC	Q1 2018	$15m	last listed Q3 2019
Acadian Asset Management LLC	Q1 2016	$13m	last listed Q2 2020
Capital World Investors	Q3 2015	$8.6m	last listed Q4 2016
Marshall Wace LLP	Q3 2020	$7.7m	last listed Q4 2020
Glenview Capital Management LLC	Q3 2020	$6.0m	last listed Q4 2020
Artisan Partners LP	Q1 2019	$5.1m	last listed Q3 2019
Voloridge Investment Management LLC	Q3 2020	$4.9m	last listed Q3 2020
PDT Partners LLC	Q2 2016	$2.2m	last listed Q4 2021

What LAB 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 LAB →

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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