Stock Ownership/PRLB

PROTO LABS INC (PRLB): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in PRLB · Industrials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
15
13F filers
Aggregate Value
$136.3M
Across holders
Last Price
$76.78
2026-08-24
Sector
Industrials
GICS
Quarterly fund activity6 increased9 reduced4 exited
Full exits: Bridgewater Associates, LP, Schonfeld Strategic Advisors LLC, Qube Research & Technologies Ltd, Man Group plc
Institutional Holders of PRLB
↗
15 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund469K$38.2M28.1%0.1%Reduced$-4.2MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund441K$35.9M26.4%0.0%Reduced$-1.9MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund211K$17.2M12.6%0.0%Reduced$-1.2MQ2 2026
JUPITER ASSET MANAGEMENT LTD
CIK 0001215838
Hedge Fund189K$15.4M11.3%0.1%Reduced$-513KQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund93K$7.6M5.6%0.0%Added+$5.5MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund89K$7.2M5.3%0.0%Added+$2.7MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund53K$4.3M3.2%0.0%Reduced$-31.1MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund37K$3.0M2.2%0.0%Added+$379KQ2 2026
ExodusPoint Capital Management, LP
CIK 0001736225
Hedge Fund34K$2.7M2.0%0.0%Added—Q2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund17K$1.4M1.0%0.0%Reduced+$1.3MQ2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$38.2M· 28.1% of total· 0.1% port· 469K sh· $-4.2M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPReduced
Hedge Fund
$35.9M· 26.4% of total· 0.0% port· 441K sh· $-1.9M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$17.2M· 12.6% of total· 0.0% port· 211K sh· $-1.2M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDReduced
Hedge Fund
$15.4M· 11.3% of total· 0.1% port· 189K sh· $-513K QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$7.6M· 5.6% of total· 0.0% port· 93K sh· +$5.5M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$7.2M· 5.3% of total· 0.0% port· 89K sh· +$2.7M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$4.3M· 3.2% of total· 0.0% port· 53K sh· $-31.1M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$3.0M· 2.2% of total· 0.0% port· 37K sh· +$379K QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$2.7M· 2.0% of total· 0.0% port· 34K sh· — QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$1.4M· 1.0% of total· 0.0% port· 17K sh· +$1.3M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$1.3M· 1.0% of total· 0.0% port· 16K sh· $-2.0M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$1.0M· 0.8% of total· 0.0% port· 13K sh· +$44K QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$804K· 0.6% of total· 0.0% port· 10K sh· $-90K QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$54K· 0.0% of total· 0.0% port· 661 sh· +$41K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$1K· 0.0% of total· 0.0% port· 18 sh· — QoQ· Q2 2026
1–10 of 15
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