277 institutional investment managers reported PRLB positions in their Form 13F filings for Q2 2026, holding 22,478,219 shares worth $1.8B in total. BlackRock, Inc. reported the largest position.

Are funds buying or selling PRLB?

In Q2 2026, 40 managers opened new PRLB positions, 98 added, 88 trimmed and 24 sold out. Managers that filed in both quarters added a net 409,626 shares.

How current is this PRLB institutional ownership data?

It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Funds · PRLB

Who owns PRLB?

Institutional ownership of Proto Labs Inc. from Form 13F, Q2 2026

277 institutional managers reported holding Proto Labs Inc. (PRLB) in Form 13F filings for Q2 2026, with 22,478,219 shares worth $1.8B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 409,626 shares (+1.9%). 40 opened new positions and 24 sold out.

Funds holding: 277
Value held: $1.8B
New / sold out: 40 / 24
Net shares, same filers: +1.9%

Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Largest holders of PRLB

Fund	Value	Share of 13F holdings	Shares	Move
BlackRock, Inc.	$318M	17.3%	3,896,222	Added
Disciplined Growth Investors Inc	$194M	10.6%	2,380,514	Trimmed
Vanguard Portfolio Management LLC	$130M	7.1%	1,599,765	Added
Dimensional Fund Advisors LP	$93.9M	5.1%	1,152,305	Trimmed
State Street Corp	$92.8M	5.1%	1,138,462	Added
Vanguard Capital Management LLC	$86.0M	4.7%	1,054,623	Added
American Capital Management Inc	$50.5M	2.8%	619,845	Trimmed
Geode Capital Management, LLC	$50.1M	2.7%	614,028	Added
Renaissance Technologies LLC	$38.2M	2.1%	469,251	Trimmed
Prudential Financial Inc	$37.3M	2.0%	457,810	Added
FMR LLC	$36.1M	2.0%	442,659	Added
Arrowstreet Capital, Limited Partnership	$35.9M	2.0%	440,816	Trimmed
Nuveen, LLC	$34.2M	1.9%	420,059	Added
Goldman Sachs Group Inc	$32.9M	1.8%	403,179	Added
Driehaus Capital Management LLC	$30.2M	1.6%	370,151	Added
Charles Schwab Investment Management Inc	$28.9M	1.6%	354,188	Trimmed
Morgan Stanley	$25.7M	1.4%	314,778	Added
S Squared Technology, LLC	$23.5M	1.3%	288,120	Trimmed
Northern Trust Corp	$23.2M	1.3%	284,562	Added
First Trust Advisors LP	$18.3M	1.0%	224,792	Added
JPMorgan Chase & Co	$17.9M	1.0%	224,717	Added
D. E. Shaw & Co., Inc.	$17.2M	0.9%	211,366	Trimmed
Nordea Investment Management AB	$16.5M	0.9%	203,883	Trimmed
Hillsdale Investment Management Inc.	$15.6M	0.9%	191,594	Added
Jupiter Asset Management LTD	$15.4M	0.8%	188,539	Trimmed

Share of 13F holdings is each fund's shares as a share of the 22,478,219 PRLB shares all 13F filers reported, not of shares outstanding.

Biggest buyers in Q2 2026

Goldman Sachs Group Inc Added+$21.4M
BlackRock, Inc. Added+$17.8M
JPMorgan Chase & Co Added+$10.9M
First Trust Advisors LP Added+$10.8M
Nuveen, LLC Added+$8.4M
Jane Street Group, LLC Added+$7.0M
Acadian Asset Management LLC Added+$6.1M
Millennium Management LLC Added+$5.5M
Vanguard Portfolio Management LLC Added+$5.0M
Prudential Financial Inc Added+$4.7M

Biggest sellers in Q2 2026

Rubric Capital Management LP Trimmed-$30.8M
Dimensional Fund Advisors LP Trimmed-$9.8M
Disciplined Growth Investors Inc Trimmed-$9.5M
Qube Research & Technologies Ltd Sold out-$8.5M
Lazard Asset Management LLC Trimmed-$7.5M
UBS Group AG Trimmed-$5.8M
Trexquant Investment LP Trimmed-$4.4M
Marshall Wace, LLP Trimmed-$4.2M
Renaissance Technologies LLC Trimmed-$4.2M
Polar Asset Management Partners Inc. Sold out-$3.4M

The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $170M and sold $127M; 98 added and 88 trimmed.

Schedule 13D and 13G filings on PRLB

Owners of more than 5% must file within days, so these can be newer than the 13F data.

2025-01-23DIMENSIONAL FUND ADVISORS LP SCHEDULE 13G filed by Proto Labs Inc.Schedule 13G

Questions about PRLB ownership

Who owns PRLB stock?: 277 institutional investment managers reported PRLB positions in their Form 13F filings for Q2 2026, holding 22,478,219 shares worth $1.8B in total. BlackRock, Inc. reported the largest position.
Are funds buying or selling PRLB?: In Q2 2026, 40 managers opened new PRLB positions, 98 added, 88 trimmed and 24 sold out. Managers that filed in both quarters added a net 409,626 shares.
How current is this PRLB institutional ownership data?: It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to PRLB by CUSIP. Options are left out. PRLB news and filings · PRLB insider trades · Top funds