Free · no sign-up · Q2 2026

Which funds own PRLB

Proto Labs Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $5.8m 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: 2; at least, of 91 current
Combined value: $5.8m; as reported
Opened: 0; new this quarter
Added to: 0; already held
Trimmed or sold out: 3; 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
ARK Investment Management LLC Long-only · $15.4bn book	$2.9m	0.0%	35,418	+$300k-10,286	Trimmed
Polen Capital Management LLC Long-only · $11.6bn book	$2.9m	0.0%	35,011	+$700k-2,583	Trimmed

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$1.2m held before

Ownership through time

At least 3 of the 95 managers whose filings are on file listed PRLB in Q2 2026, against 6 in Q2 2013. 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

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

No manager on file started a position.

Largest increases, by shares

No manager on file bought more.

Largest decreases, by shares

Renaissance Technologies LLC520,251 to 469,251 shares-$4.2m
ARK Investment Management LLC45,704 to 35,418 shares-$838k
Polen Capital Management LLC37,594 to 35,011 shares-$211k

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
Renaissance Technologies LLC	Q1 2026	$38m	$38m
ARK Investment Management LLC	Q4 2016	$632m	$2.9m
Polen Capital Management LLC	Q4 2025	$2.9m	$2.9m
Janus Henderson Group Ltd	Q2 2013	$172m	last listed Q4 2019
MFS Investment Management	Q2 2013	$53m	last listed Q2 2014
Capital World Investors	Q2 2013	$39m	last listed Q1 2014
Two Sigma Investments LP	Q1 2021	$38m	last listed Q4 2021
Capital Research Global Investors	Q2 2016	$31m	last listed Q3 2017
Artisan Partners LP	Q2 2013	$31m	last listed Q4 2016
Arrowstreet Capital LP	Q4 2017	$24m	last listed Q1 2018
Two Sigma Advisers LP	Q2 2021	$24m	last listed Q1 2022
Voloridge Investment Management LLC	Q4 2021	$13m	last listed Q4 2021
Maverick Capital Ltd	Q3 2017	$10m	last listed Q3 2019

What PRLB 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 PRLB →

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

One email a week on what moved in the market and what it means for the people interviewing into it, with the 13F changes the quarter they are filed.

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