PRLB Institutional Ownership & Shareholders
PROTO LABS INC (PRLB) is currently held by 275 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.83B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PRLB tracked by InsiderSet, reporting ownership valued at approximately $317.58M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $268.41M, representing an estimated loss of -15.48% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 60% of the total disclosed PRLB value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Disciplined Growth Investors, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in PROTO LABS INC (PRLB).
This page ranks the largest institutional PRLB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
275
Total Reported Value
$1.83B
Largest Holder
Blackrock, Inc.
Largest Position
$317.58M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
52
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 3,896,222 | $317,581,055 | $268,410,734 | -$49,170,321 | -15.48% | |
| Disciplined Growth Investors | Fred Martin | 3.29% | 2,380,514 | $194,035,737 | $163,993,609 | -$30,042,128 | -15.48% |
| Vanguard Portfolio Management Llc | 0.01% | 1,599,765 | $130,396,845 | $110,207,811 | -$20,189,034 | -15.48% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,152,305 | $93,921,327 | $79,382,291 | -$14,539,036 | -15.48% | |
| State Street Corp | 0.00% | 1,138,462 | $92,796,038 | $78,428,647 | -$14,367,391 | -15.48% | |
| Vanguard Capital Management Llc | 0.00% | 1,054,623 | $85,962,321 | $72,652,978 | -$13,309,343 | -15.48% | |
| American Capital Management Inc | 2.27% | 619,845 | $50,523,566 | $42,701,122 | -$7,822,444 | -15.48% | |
| Geode Capital Management, Llc | 0.00% | 614,028 | $50,059,895 | $42,300,389 | -$7,759,506 | -15.50% | |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 469,251 | $38,248,649 | $32,326,701 | -$5,921,948 | -15.48% |
| Prudential Financial Inc | 0.04% | 457,810 | $37,316,093 | $31,538,531 | -$5,777,562 | -15.48% | |
| Fmr Llc | 0.00% | 442,659 | $36,081,151 | $30,494,779 | -$5,586,372 | -15.48% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 440,816 | $35,930,912 | $30,367,814 | -$5,563,098 | -15.48% | |
| Nuveen, Llc | 0.01% | 420,059 | $34,239,010 | $28,937,865 | -$5,301,145 | -15.48% | |
| Goldman Sachs Group Inc | 0.00% | 403,179 | $32,863,120 | $27,775,001 | -$5,088,119 | -15.48% | |
| Driehaus Capital Management Llc | 0.17% | 370,151 | $30,171,008 | $25,499,702 | -$4,671,306 | -15.48% | |
| Charles Schwab Investment Management Inc | 0.00% | 354,188 | $28,869,864 | $24,400,011 | -$4,469,853 | -15.48% | |
| Morgan Stanley | 0.00% | 314,778 | $25,657,634 | $21,685,056 | -$3,972,578 | -15.48% | |
| S Squared Technology, Llc | 7.29% | 288,120 | $23,484,661 | $19,848,587 | -$3,636,074 | -15.48% | |
| Northern Trust Corp | 0.00% | 284,562 | $23,194,648 | $19,603,476 | -$3,591,172 | -15.48% | |
| First Trust Advisors Lp | 0.01% | 224,792 | $18,322,795 | $15,485,921 | -$2,836,874 | -15.48% | |
| Jpmorgan Chase & Co | 0.00% | 224,717 | $17,930,209 | $15,480,754 | -$2,449,455 | -13.66% | |
| D. E. Shaw & Co., Inc. | 0.01% | 211,366 | $17,228,443 | $14,561,004 | -$2,667,439 | -15.48% | |
| Nordea Investment Management Ab | 0.01% | 203,883 | $16,506,368 | $14,045,500 | -$2,460,868 | -14.91% | |
| Hillsdale Investment Management Inc. | 0.36% | 191,594 | $15,616,827 | $13,198,911 | -$2,417,916 | -15.48% | |
| Jupiter Asset Management Ltd | 0.08% | 188,539 | $15,367,814 | $12,988,452 | -$2,379,362 | -15.48% | |
| Panagora Asset Management Inc | 0.05% | 180,713 | $14,729,917 | $12,449,319 | -$2,280,598 | -15.48% | |
| Principal Financial Group Inc | 0.01% | 153,209 | $14,531,874 | $10,554,568 | -$3,977,306 | -27.37% | |
| Vanguard Fiduciary Trust Co | 0.00% | 157,987 | $12,877,520 | $10,883,724 | -$1,993,796 | -15.48% | |
| Bank Of New York Mellon Corp | 0.00% | 143,782 | $11,719,712 | $9,905,142 | -$1,814,570 | -15.48% | |
| Jane Street Group, Llc | 0.01% | 143,527 | $11,698,886 | $9,887,575 | -$1,811,311 | -15.48% | |
| Bank Of America Corp | 0.00% | 125,997 | $10,270,017 | $8,679,933 | -$1,590,084 | -15.48% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | 120,473 | $9,819,754 | $8,299,385 | -$1,520,369 | -15.48% | |
| Gagnon Securities Llc | 1.83% | 116,283 | $9,478,227 | $8,010,736 | -$1,467,491 | -15.48% | |
| Rice Hall James & Associates, Llc | 0.43% | 108,964 | $8,881,656 | $7,506,530 | -$1,375,126 | -15.48% | |
| Rubric Capital Management Lp | 0.08% | 108,692 | $8,859,485 | $7,487,792 | -$1,371,693 | -15.48% | |
| Invesco Ltd. | 0.00% | 108,421 | $8,837,396 | $7,469,123 | -$1,368,273 | -15.48% | |
| Acadian Asset Management Llc | 0.01% | 99,186 | $8,076,000 | $6,832,924 | -$1,243,076 | -15.39% | |
| Ubs Group Ag | 0.00% | 97,304 | $7,931,249 | $6,703,273 | -$1,227,976 | -15.48% | |
| Public Sector Pension Investment Board | 0.02% | 95,645 | $7,796,024 | $6,588,984 | -$1,207,040 | -15.48% | |
| Millennium Management Llc | 0.01% | 92,960 | $7,577,170 | $6,404,014 | -$1,173,156 | -15.48% | |
| Citadel Advisors Llc | 0.00% | 88,625 | $7,223,824 | $6,105,376 | -$1,118,448 | -15.48% | |
| American Century Companies Inc | 0.00% | 79,056 | $6,443,854 | $5,446,168 | -$997,686 | -15.48% | |
| Ameriprise Financial Inc | 0.00% | 69,786 | $5,688,257 | $4,807,558 | -$880,699 | -15.48% | |
| Edgestream Partners, L.P. | 0.16% | 65,799 | $5,363,276 | $4,532,893 | -$830,383 | -15.48% | |
| Informed Momentum Co Llc | 0.47% | 64,803 | $5,282,093 | $4,464,279 | -$817,814 | -15.48% | |
| Rhumbline Advisers | 0.00% | 57,970 | $4,725,116 | $3,993,553 | -$731,563 | -15.48% | |
| Legal & General Group Plc | 0.00% | 56,739 | $4,624,796 | $3,908,750 | -$716,046 | -15.48% | |
| Roubaix Capital, Llc | 1.62% | 55,415 | $4,516,877 | $3,817,539 | -$699,338 | -15.48% | |
| Aqr Capital Management Llc | 0.00% | 53,308 | $4,345,136 | $3,672,388 | -$672,748 | -15.48% | |
| Zacks Investment Management | 0.03% | 52,989 | $4,319,217 | $3,650,412 | -$668,805 | -15.48% |
Frequently asked questions about PRLB
Who are the largest institutional holders of PRLB?
The largest institutional holders of PRLB reported in the latest SEC Form 13F filings include Blackrock, Inc., Disciplined Growth Investors, Vanguard Portfolio Management Llc, Dimensional Fund Advisors Lp, and State Street Corp. InsiderSet ranks institutional holders by their latest reported PRLB position.
What is PRLB institutional ownership?
This page tracks PRLB positions reported by institutional investment managers through SEC Form 13F. PROTO LABS INC (PRLB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own PRLB?
InsiderSet currently tracks 275 institutional managers reporting PRLB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of PRLB shareholders.
How much PRLB stock do institutions own?
Institutional investment managers disclosed approximately $1.83B in PRLB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was PRLB institutional ownership last updated?
The latest PRLB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional PRLB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its PRLB position after the reporting date.
Are institutions buying or selling PRLB?
Institutional buying and selling can be analyzed by comparing PRLB positions across consecutive 13F reporting periods. InsiderSet's PRLB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View PRLB ownership changes.
How has PRLB institutional ownership changed over time?
InsiderSet tracks PRLB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.