PRLB · Proto Labs Inc · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding PRLB
All superinvestors →Holder Concentration
Across 277 13F filersWho Holds PRLB
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 277 filers, like-for-like change +1.7%; actively managed books -2.6%; index-like books +9.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 51.2% | 139 | -3.4% |
| Exempt adviser | 0.1% | 1 | -92.4% |
| Adviser | 4.0% | 9 | -6.4% |
| Bank | 9.3% | 19 | +7.9% |
| Insurer | 2.6% | 2 | +11.1% |
| Broker-dealer | 0.0% | 1 | +39.9% |
| Benefit plan | 0.4% | 6 | +5.6% |
| Non-US | 1.7% | 9 | -0.4% |
| Holding company | 22.6% | 7 | +11.7% |
| Unknown | 8.0% | 84 | +19.0% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 39.3% | 33 | +9.0% |
| Systematic-like | 3.2% | 22 | -20.7% |
| Concentrated | 1.4% | 27 | -5.7% |
| Diversified active | 56.1% | 195 | -1.2% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 61.3% | 152 | +5.3% |
| Medium turnover | 20.7% | 64 | -5.7% |
| High turnover | 5.2% | 40 | -10.1% |
| Unknown | 12.8% | 21 | +3.3% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 14.0% | 34 | +1.1% |
| Medium horizon | 20.0% | 34 | +7.2% |
| Long horizon | 61.8% | 192 | +4.6% |
| Unknown | 4.2% | 17 | -38.1% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 3.0% | 45 | -5.3% |
| $1B to $10B | 17.3% | 81 | -1.0% |
| $10B to $100B | 12.8% | 83 | -19.6% |
| $100B or more | 66.9% | 68 | +8.3% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 1.5% | 59 | +2.5% |
| Pooled investment vehicles | 9.4% | 25 | -16.4% |
| Registered funds and BDCs | 23.3% | 20 | +2.1% |
| Pension and profit sharing plans | 0.1% | 3 | +4.7% |
| Insurance companies | 0.3% | 4 | +71.5% |
| Governments and sovereign funds | 1.6% | 5 | -16.5% |
| Other investment advisers | 0.1% | 5 | +27.8% |
| Other | 0.1% | 1 | +61.2% |
| Diversified | 14.8% | 17 | -2.3% |
| Unknown | 48.8% | 138 | +7.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 25.2% | 42 | -10.2% |
| Private equity funds | 0.3% | 10 | +24.3% |
| Venture capital funds | 0.0% | 1 | 0.0% |
| Real estate funds | 0.0% | 2 | -11.6% |
| Securitized asset funds | 0.3% | 1 | -1.1% |
| Other private funds | 6.3% | 12 | -5.6% |
| Mixed private funds | 0.3% | 2 | +7.4% |
| Private funds, type not stated | 0.1% | 1 | new |
| No private funds | 18.9% | 69 | +1.7% |
| Unknown | 48.7% | 137 | +9.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 94.3% | 232 | +4.0% |
| Outside the US | 5.7% | 45 | -25.7% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 5 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
277 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $561,492 (0 buying, 1 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 24.9% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies PRLB's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ALRM Alarm.com Holdings, Inc. | 4 |
| 2 | FTK Flotek Industries Inc/Cn/ | 3 |
| 3 | DV DoubleVerify Holdings, Inc. | 4 |
| 4 | NEOG Neogen Corp | 4 |
| 5 | CRI Carters Inc | 3 |
| 6 | GNTX Gentex Corp | 7 |
| 7 | GHM Graham Corp | 4 |
| 8 | QDEL QuidelOrtho Corp | 3 |
| 9 | MD Pediatrix Medical Group, Inc. | 3 |
| 10 | PLPC Preformed Line Products Co | 3 |
Shareholder Targets
13F filers that own its peers but not PRLB, quarter ended Jun 30, 2026Found through its holder-overlap peers: ALRM, FTK, DV, NEOG, CRI, GNTX, GHM, QDEL, MD, PLPC, IPGP, PLXS, OPLN, NWPX, ICHR, AMRX, VPG, DGII, SHLS, AZZ. 1,104 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | T. Rowe Price Investment Management, Inc. Adviser, Diversified active | $611,074,081 8 held | AZZ, NEOG, VPG |
| 2 | FULLER & THALER ASSET MANAGEMENT, INC. Registered adviser, Diversified active | $575,352,148 8 held | PLXS, GNTX, OPLN |
| 3 | NEUBERGER BERMAN GROUP LLC Holding company, Diversified active | $552,653,512 12 held | OPLN, NEOG, IPGP |
| 4 | First Eagle Investment Management, LLC Registered adviser, Diversified active | $488,481,060 7 held | IPGP, PLXS, GHM |
| 5 | Capital International Investors Adviser, Diversified active | $442,766,235 2 held | ICHR, AZZ |
| 6 | HighTower Advisors, LLC Registered adviser, Diversified active | $433,831,955 8 held | PLPC, AZZ, GNTX |
| 7 | ROYCE & ASSOCIATES LP Registered adviser, Diversified active | $390,257,109 14 held | ICHR, DGII, GHM |
| 8 | EARNEST PARTNERS LLC Registered adviser, Diversified active | $321,044,947 2 held | PLXS, DGII |
| 9 | WASATCH ADVISORS LP Registered adviser, Diversified active | $255,234,042 4 held | PLPC, MD, DGII |
| 10 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $240,896,648 7 held | ICHR, CRI, DGII |
Fund Ownership of PRLB by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 29.56% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 4.95% | 1,184,113 |
| Index ETFs | 24.61% | 5,888,142 |
| Active ETFs | 3.08% | 736,150 |
| Active funds | 10.97% | 2,625,107 |
| Unclassified | 0.46% | 108,958 |
| All registered funds | 44.07% | 10,542,470 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $317,581,047 | 17.32% | 3,896,222 | Shares | 2026-08-07 | |
| Mid DISCIPLINED GROWTH INVESTORS INC /MN Registered adviser | $194,035,696 | 10.58% | 2,380,514 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $130,396,845 | 7.11% | 1,599,765 | Shares | 2026-08-13 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $93,924,378 | 5.12% | 1,152,305 | Shares | 2026-08-11 | |
| Mega STATE STREET CORP Bank | $92,796,037 | 5.06% | 1,138,462 | Shares | 2026-09-22 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $85,962,320 | 4.69% | 1,054,623 | Shares | 2026-08-13 | |
| Mid AMERICAN CAPITAL MANAGEMENT INC Adviser | $50,523,565 | 2.75% | 619,845 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $50,049,421 | 2.73% | 614,028 | Shares | 2026-08-12 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $38,248,649 | 2.09% | 469,251 | Shares | 2026-08-13 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $37,316,093 | 2.03% | 457,810 | Shares | 2026-08-12 | |
| Mega FMR LLC Holding company | $36,081,134 | 1.97% | 442,659 | Shares | 2026-08-13 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $35,930,912 | 1.96% | 440,816 | Shares | 2026-08-13 | |
| Mega Nuveen, LLC | $34,239,007 | 1.87% | 420,059 | Shares | 2026-08-11 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $32,863,119 | 1.79% | 403,179 | Shares | 2026-08-14 | |
| Large Driehaus Capital Management LLC Registered adviser | $30,171,008 | 1.65% | 370,151 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $28,869,863 | 1.57% | 354,188 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $25,657,549 | 1.40% | 314,778 | Shares | 2026-08-13 | |
| Small S SQUARED TECHNOLOGY, LLC Registered adviser | $23,484,661 | 1.28% | 288,120 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $23,194,646 | 1.26% | 284,562 | Shares | 2026-08-13 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $18,322,795 | 1.00% | 224,792 | Shares | 2026-08-11 | |
| Mega JPMORGAN CHASE & CO Bank | $18,316,679 | 1.00% | 224,717 | Shares | 2026-08-12 | |
| Mega D. E. Shaw & Co., Inc. | $17,228,442 | 0.94% | 211,366 | Shares | 2026-08-14 | |
| Mega NORDEA INVESTMENT MANAGEMENT AB Non-US | $16,618,502 | 0.91% | 203,883 | Shares | 2026-08-05 | |
| Mid Hillsdale Investment Management Inc. Registered adviser | $15,616,826 | 0.85% | 191,594 | Shares | 2026-08-12 | |
| Large JUPITER ASSET MANAGEMENT LTD Registered adviser | $15,367,813 | 0.84% | 188,539 | Shares | 2026-08-10 | |
| Large PANAGORA ASSET MANAGEMENT INC Registered adviser | $14,729,916 | 0.80% | 180,713 | Shares | 2026-08-06 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $12,877,520 | 0.70% | 157,987 | Shares | 2026-08-13 | |
| Mega Bank of New York Mellon Corp Bank | $11,719,666 | 0.64% | 143,782 | Shares | 2026-08-06 | |
| Mega JANE STREET GROUP, LLC | $11,698,884 | 0.64% | 143,527 | Shares | 2026-08-14 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $11,014,934 | 0.60% | 135,136 | Shares | 2026-08-04 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $10,270,014 | 0.56% | 125,997 | Shares | 2026-08-14 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $9,819,754 | 0.54% | 120,473 | Shares | 2026-08-13 | |
| Small GAGNON SECURITIES LLC Registered adviser | $9,478,227 | 0.52% | 116,283 | Shares | 2026-08-05 | |
| Mid RICE HALL JAMES & ASSOCIATES, LLC Registered adviser | $8,881,655 | 0.48% | 108,964 | Shares | 2026-08-07 | |
| Large Rubric Capital Management LP Registered adviser | $8,859,484 | 0.48% | 108,692 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $8,837,393 | 0.48% | 108,421 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $8,084,650 | 0.44% | 99,186 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $7,931,248 | 0.43% | 97,304 | Shares | 2026-08-13 | |
| Large Public Sector Pension Investment Board Non-US | $7,796,023 | 0.43% | 95,645 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $7,577,169 | 0.41% | 92,960 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $7,223,823 | 0.39% | 88,625 | Shares | 2026-09-02 | |
| Mega AMERICAN CENTURY COMPANIES INC | $6,443,854 | 0.35% | 79,056 | Shares | 2026-08-12 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $5,688,256 | 0.31% | 69,786 | Shares | 2026-08-14 | |
| Mid Edgestream Partners, L.P. | $5,363,276 | 0.29% | 65,799 | Shares | 2026-08-11 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $5,301,731 | 0.29% | 65,044 | Shares | 2026-08-13 | |
| Mid Informed Momentum Co LLC Registered adviser | $5,282,092 | 0.29% | 64,803 | Shares | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $4,725,134 | 0.26% | 57,970 | Shares | 2026-08-12 | |
| Mega Legal & General Group Plc | $4,624,794 | 0.25% | 56,739 | Shares | 2026-08-14 | |
| Small Roubaix Capital, LLC Registered adviser | $4,516,876 | 0.25% | 55,415 | Shares | 2026-08-10 | |
| Mega FRANKLIN RESOURCES INC Adviser | $4,490,873 | 0.24% | 55,096 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $4,346,027 | 0.24% | 53,319 | Shares | 2026-08-14 | |
| Large ZACKS INVESTMENT MANAGEMENT Registered adviser | $4,319,133 | 0.24% | 52,989 | Shares | 2026-08-13 | |
| Mega Swiss National Bank | $3,888,027 | 0.21% | 47,700 | Shares | 2026-08-11 | |
| Large INTECH INVESTMENT MANAGEMENT LLC Registered adviser | $3,731,201 | 0.20% | 45,776 | Shares | 2026-08-10 | |
| Mid Campbell & CO Investment Adviser LLC Registered adviser | $3,488,464 | 0.19% | 42,798 | Shares | 2026-08-03 | |
| Small HUSSMAN STRATEGIC ADVISORS, INC. Registered adviser | $3,423,420 | 0.19% | 42,000 | Shares | 2026-08-03 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $3,179,949 | 0.17% | 39,013 | Shares | 2026-08-14 | |
| Small AIMZ Investment Advisors, LLC Registered adviser | $3,156,719 | 0.17% | 38,728 | Shares | 2026-08-14 | |
| Large Point72 Asset Management, L.P. Registered adviser | $3,018,559 | 0.16% | 37,033 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC Registered adviser | $2,991,009 | 0.16% | 36,695 | Shares | 2026-08-13 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $2,971,610 | 0.16% | 36,457 | Shares | 2026-08-13 | |
| Large ARK Investment Management LLC Registered adviser | $2,886,921 | 0.16% | 35,418 | Shares | 2026-08-14 | |
| Large POLEN CAPITAL MANAGEMENT LLC Registered adviser | $2,853,746 | 0.16% | 35,011 | Shares | 2026-08-04 | |
| Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $2,751,777 | 0.15% | 33,760 | Shares | 2026-08-14 | |
| Large ExodusPoint Capital Management, LP Registered adviser | $2,745,501 | 0.15% | 33,683 | Shares | 2026-08-14 | |
| Large Quantinno Capital Management LP Registered adviser | $2,667,822 | 0.15% | 32,730 | Shares | 2026-08-13 | |
| Large FEDERATED HERMES, INC. Adviser | $2,620,057 | 0.14% | 32,144 | Shares | 2026-08-12 | |
| Mega CITIGROUP INC Bank | $2,551,914 | 0.14% | 31,308 | Shares | 2026-08-03 | |
| Mid KAMES CAPITAL plc Registered adviser | $2,526,810 | 0.14% | 31,000 | Shares | 2026-07-13 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $2,513,686 | 0.14% | 30,839 | Shares | 2026-08-12 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $2,252,936 | 0.12% | 27,640 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $2,204,356 | 0.12% | 27,044 | Shares | 2026-08-24 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC Registered adviser | $2,200,770 | 0.12% | 27,000 | Shares | 2026-08-14 | |
| Mid Engineers Gate Manager LP | $2,182,837 | 0.12% | 26,780 | Shares | 2026-08-14 | |
| Large Thrivent Financial for Lutherans Registered adviser | $2,076,548 | 0.11% | 25,476 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $2,047,449 | 0.11% | 25,119 | Shares | 2026-08-07 | |
| Mega HSBC HOLDINGS PLC | $2,013,214 | 0.11% | 24,699 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $2,007,834 | 0.11% | 24,633 | Shares | 2026-08-14 | |
| Mega SEI INVESTMENTS CO | $1,962,352 | 0.11% | 24,075 | Shares | 2026-08-14 | |
| Small Jackson Creek Investment Advisors LLC Registered adviser | $1,830,633 | 0.10% | 22,459 | Shares | 2026-08-10 | |
| Large HRT FINANCIAL LP | $1,790,367 | 0.10% | 21,965 | Shares | 2026-08-14 | |
| Mid GILDER GAGNON HOWE & CO LLC Registered adviser | $1,734,043 | 0.09% | 21,274 | Shares | 2026-08-14 | |
| Large GABELLI FUNDS LLC Registered adviser | $1,722,469 | 0.09% | 21,132 | Shares | 2026-08-12 | |
| Mid SG Capital Management LLC Registered adviser | $1,635,742 | 0.09% | 20,068 | Shares | 2026-08-07 | |
| Large CANADA LIFE ASSURANCE Co | $1,548,690 | 0.08% | 19,000 | Shares | 2026-08-13 | |
| Large TEACHER RETIREMENT SYSTEM OF TEXAS Benefit plan | $1,539,316 | 0.08% | 18,885 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $1,480,709 | 0.08% | 18,166 | Shares | 2026-08-06 | |
| Large MARSHALL WACE, LLP Exempt adviser | $1,379,230 | 0.08% | 16,921 | Shares | 2026-08-13 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $1,373,932 | 0.07% | 16,856 | Shares | 2026-08-13 | |
| Large Squarepoint Ops LLC Registered adviser | $1,339,942 | 0.07% | 16,439 | Shares | 2026-08-14 | |
| Small State of Wyoming | $1,334,318 | 0.07% | 16,370 | Shares | 2026-08-06 | |
| Large CAPTRUST FINANCIAL ADVISORS Registered adviser | $1,298,861 | 0.07% | 15,935 | Shares | 2026-08-13 | |
| Mid BAILARD, INC. Registered adviser | $1,221,762 | 0.07% | 12,881 | Shares | 2026-10-13 | |
| Mid Oak Harvest Investment Services | $1,185,625 | 0.06% | 12,500 | Shares | 2026-10-20 | |
| Large Trexquant Investment LP Registered adviser | $1,158,990 | 0.06% | 14,219 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC Registered adviser | $1,148,149 | 0.06% | 14,086 | Shares | 2026-08-14 | |
| Small Marks Group Wealth Management, Inc Registered adviser | $1,140,406 | 0.06% | 13,991 | Shares | 2026-07-28 | |
| Mega SG Americas Securities, LLC | $1,084,979 | 0.06% | 13,311 | Shares | 2026-08-07 | |
| Mid Jump Financial, LLC | $1,075,442 | 0.06% | 13,194 | Shares | 2026-08-13 | |
| Large State of Tennessee, Department of Treasury | $1,061,912 | 0.06% | 13,028 | Shares | 2026-08-14 |
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