13F Insight
DOSSIER · 13F Holders · Q1 2026Industrials · Fabricated Structural Metal ProductsCyclicalNet sold
PRLB

PROTO LABS INC

269 institutions still hold PROTO LABS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 743713109·Fabricated Structural Metal Products·269 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 0.4%
vs prior quarter
13F value held
$983M
63.0% inst. owned
of float
Holders
269
-24 QoQ
filers reporting
Activity
+24 / −121
+987 added · −868 reduced
this quarter
Concentration
21.33%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

269 institutions reported PRLB in Q1 2026. BlackRock, Inc. leads at 21.3% of the visible book. -24 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$210M3.7M0.00%Q1 202602
DISCIPLINED GROWTH INVESTORS INC /MN
CIK 0001050442
$142M2.5M2.91%Q1 202603
Vanguard Portfolio Management
CIK 0002100121
$88M1.5M0.00%Q1 202604
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$73M1.3M0.02%Q1 202605
STATE STREET CORP
CIK 0000093751
$62M1.1M0.00%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$59M1.0M0.00%Q1 202607
Rubric Capital Management LP
CIK 0001687509
$57M1.1M0.68%Q4 202508
AMERICAN CAPITAL MANAGEMENT INC
CIK 0001320168
$36M628K1.92%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$33M580K0.00%Q1 202610
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$30M520K0.05%Q1 202611
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$26M464K0.01%Q1 202612
FMR LLC
CIK 0000315066
$24M422K0.00%Q1 202613
PRUDENTIAL FINANCIAL INC
CIK 0001137774
$23M400K0.03%Q1 202614
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 0000938206
$21M369K0.15%Q1 202615
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$21M360K0.00%Q1 202616
Nuveen, LLC
CIK 0001871926
$18M317K0.00%Q1 202617
S Squared Technology, LLC
CIK 0001322924
$17M296K6.39%Q1 202618
MORGAN STANLEY
CIK 0000895421
$17M294K0.00%Q1 202619
NORTHERN TRUST CORP
CIK 0000073124· Index
$15M267K0.00%Q1 202620
NORDEA INVESTMENT MANAGEMENT AB
CIK 0001218210
$12M214K0.01%Q1 2026
Page 1 of 14
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