Proto Labs Inc: which funds bought and sold
Institutions that bought and sold Proto Labs shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 137 institutions that filed 13F reports for both quarters added to or opened positions in Proto Labs, and 114 cut or closed them. Together they added a net 351K shares, +1.6% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 639K shares (−9.8%); index fund managers were net buyers of 383K shares (+4.4%). 36 opened a new position and 25 sold out entirely.
Bought, Q2 2026 137 institutions, 36 of them new holders Sold, Q2 2026 114 institutions, 25 of them sold out
Net change, all compared +351K shares (+1.6%)
Net change, active managers −639K shares (−9.8%), 24 bought, 22 sold
Buyers versus sellers
137 bought 42 114 sold
Active managers and hedge funds 24 bought · 22 sold · −639K
Index fund managers 7 bought · 3 sold · +383K
Other institutions 106 bought · 89 sold · +607K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Goldman Sachs Group Inc | +262K +186.1% | 403K | $32.9M |
| Blackrock, Inc. Index funds | +218K +5.9% | 3.9M | $318M |
| Jpmorgan Chase & Co | +137K +156.6% | 225K | $17.9M |
| First Trust Advisors LP | +132K +142.1% | 225K | $18.3M |
| Nuveen, LLC | +103K +32.5% | 420K | $34.2M |
| Jane Street Group, LLC | +86K +150.2% | 144K | $11.7M |
| Acadian Asset Management LLC Active manager | +75K +304.9% | 99K | $8.1M |
| Millennium Management LLC Hedge fund | +67K +259.9% | 93K | $7.6M |
| Vanguard Portfolio Management LLC Index funds | +61K +4.0% | 1.6M | $130M |
| Prudential Financial Inc | +58K +14.4% | 458K | $37.3M |
| Roubaix Capital, LLC | +55K New position | 55K | $4.5M |
| Edgestream Partners, L.P. Hedge fund | +47K +246.0% | 66K | $5.4M |
| State Street Corp Index funds | +46K +4.3% | 1.1M | $92.8M |
| Citadel Advisors LLC Hedge fund | +44K +99.1% | 89K | $7.2M |
| Geode Capital Management, LLC Index funds | +34K +5.8% | 614K | $50.1M |
| Exoduspoint Capital Management, LP Hedge fund | +34K New position | 34K | $2.7M |
| Algert Global LLC Hedge fund | +30K +480.2% | 37K | $3M |
| Campbell & Co Investment Adviser LLC | +28K +181.8% | 43K | $3.5M |
| BNP Paribas Financial Markets | +24K +189.5% | 36K | $3M |
| Susquehanna Fundamental Investments, LLC | +23K +227.0% | 34K | $2.8M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Acadian Asset Management LLC Active manager | +75K +304.9% | 99K | $8.1M |
| Millennium Management LLC Hedge fund | +67K +259.9% | 93K | $7.6M |
| Edgestream Partners, L.P. Hedge fund | +47K +246.0% | 66K | $5.4M |
| Citadel Advisors LLC Hedge fund | +44K +99.1% | 89K | $7.2M |
| Exoduspoint Capital Management, LP Hedge fund | +34K New position | 34K | $2.7M |
| Algert Global LLC Hedge fund | +30K +480.2% | 37K | $3M |
| FMR LLC Active manager | +20K +4.8% | 443K | $36.1M |
| Engineers Gate Manager LP Hedge fund | +12K +84.7% | 27K | $2.2M |
| Quadrature Capital Ltd Hedge fund | +7,379 +160.0% | 12K | $977,305 |
| Alliancebernstein L.P. Active manager | +6,900 +33.3% | 28K | $1.6M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Rubric Capital Management LP Hedge fund | −378K −77.7% | 109K | $8.9M |
| Qube Research & Technologies Ltd Hedge fund | −149K Sold out | 0 | — |
| Dimensional Fund Advisors LP | −120K −9.4% | 1.2M | $93.9M |
| Disciplined Growth Investors Inc Active manager | −117K −4.7% | 2.4M | $194M |
| Lazard Asset Management LLC Active manager | −92K −92.9% | 7,086 | $577,580 |
| UBS Group AG | −71K −42.3% | 97K | $7.9M |
| Polar Asset Management Partners Inc. | −60K Sold out | 0 | — |
| Trexquant Investment LP Hedge fund | −54K −79.3% | 14K | $1.2M |
| Marshall Wace, LLP Hedge fund | −51K −75.2% | 17K | $1.4M |
| Renaissance Technologies LLC Hedge fund | −51K −9.8% | 469K | $38.2M |
| Archon Capital Management LLC | −49K Sold out | 0 | — |
| Gsa Capital Partners LLP | −36K −77.4% | 11K | $864,000 |
| Integrated Quantitative Investments LLC | −32K Sold out | 0 | — |
| Bastion Asset Management Inc. | −28K Sold out | 0 | — |
| Squarepoint Ops LLC Hedge fund | −25K −60.2% | 16K | $1.3M |
| Virginia Retirement Systems Et Al | −23K Sold out | 0 | — |
| Arrowstreet Capital, Limited Partnership Hedge fund | −23K −5.0% | 441K | $35.9M |
| Assenagon Asset Management S.A. | −22K −47.7% | 24K | $2M |
| Quantbot Technologies LP Hedge fund | −21K Sold out | 0 | — |
| D. E. Shaw & Co., Inc. Hedge fund | −14K −6.3% | 211K | $17.2M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Rubric Capital Management LP Hedge fund | −378K −77.7% | 109K | $8.9M |
| Qube Research & Technologies Ltd Hedge fund | −149K Sold out | 0 | — |
| Disciplined Growth Investors Inc Active manager | −117K −4.7% | 2.4M | $194M |
| Lazard Asset Management LLC Active manager | −92K −92.9% | 7,086 | $577,580 |
| Trexquant Investment LP Hedge fund | −54K −79.3% | 14K | $1.2M |
| Marshall Wace, LLP Hedge fund | −51K −75.2% | 17K | $1.4M |
| Renaissance Technologies LLC Hedge fund | −51K −9.8% | 469K | $38.2M |
| Squarepoint Ops LLC Hedge fund | −25K −60.2% | 16K | $1.3M |
| Arrowstreet Capital, Limited Partnership Hedge fund | −23K −5.0% | 441K | $35.9M |
| Quantbot Technologies LP Hedge fund | −21K Sold out | 0 | — |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Roubaix Capital, LLC | 55K | $4.5M |
| Exoduspoint Capital Management, LPHedge fund | 34K | $2.7M |
| SG Capital Management LLC | 20K | $1.6M |
| Jump Financial, LLC | 13K | $1.1M |
| Jefferies Financial Group Inc. | 11K | $872,972 |
| Militia Capital Management LLC | 10K | $815,100 |
| Perpetual Ltd | 8,006 | $652,569 |
| Jag Capital Management, LLC | 6,832 | $556,876 |
| Centerbook Partners LPHedge fund | 5,880 | $479,279 |
| Guggenheim Capital LLC | 5,617 | $457,842 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Qube Research & Technologies LtdHedge fund | 149K | $8.5M |
| Polar Asset Management Partners Inc. | 60K | $3.4M |
| Archon Capital Management LLC | 49K | $2.8M |
| Integrated Quantitative Investments LLC | 32K | $1.8M |
| Bastion Asset Management Inc. | 28K | $1.6M |
| Virginia Retirement Systems Et Al | 23K | $1.3M |
| Quantbot Technologies LPHedge fund | 21K | $1.2M |
| Legato Capital Management LLC | 12K | $690,683 |
| Bridgewater Associates, LPHedge fund | 7,690 | $438,484 |
| Independent Financial Group, LLC | 6,915 | $394,293 |
Who holds the shares
- Institutions reporting
- 275
- Ten largest holders
- 59.6% of 13F-reported shares
- Index fund managers
- 40.8% of 13F-reported shares
- Active managers and hedge funds
- 26.1% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 24 | 22 | 3 | 5 | −639K | −9.8% |
| Index fund managers | 7 | 3 | 0 | 0 | +383K | +4.4% |
| Other institutions | 106 | 89 | 33 | 20 | +607K | +8.9% |