Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in PRLB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 3.7M | $209.7M | +1.6% | 15.458% | 0.00% |
| 2 | DISCIPLINED GROWTH INVESTORS INC /MN | 2.5M | $142.4M | -6.6% | 10.496% | 2.91% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.5M | $87.7M | — | 6.466% | 0.00% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 1.3M | $72.5M | -0.3% | 5.348% | 0.02% |
| 5 | STATE STREET CORP | 1.1M | $62.3M | +0.4% | 4.590% | 0.00% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 1.0M | $59.3M | — | 4.370% | 0.00% |
| 7 | AMERICAN CAPITAL MANAGEMENT INC | 628K | $35.8M | -0.6% | 2.638% | 1.92% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 580K | $33.1M | +3.9% | 2.439% | 0.00% |
| 9 | RENAISSANCE TECHNOLOGIES LLC | 520K | $29.7M | +5.4% | 2.187% | 0.05% |
| 10 | Rubric Capital Management LP | 486K | $27.7M | -56.7% | 2.044% | 0.34% |
| 11 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 464K | $26.4M | +0.7% | 1.949% | 0.01% |
| 12 | FMR LLC | 422K | $24.1M | +245.9% | 1.775% | 0.00% |
| 13 | PRUDENTIAL FINANCIAL INC | 400K | $22.8M | +118.9% | 1.682% | 0.03% |
| 14 | DRIEHAUS CAPITAL MANAGEMENT LLC | 369K | $21.0M | -3.4% | 1.551% | 0.15% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 360K | $20.5M | -0.8% | 1.514% | 0.00% |
| 16 | Nuveen, LLC | 317K | $18.1M | -2.7% | 1.332% | 0.00% |
| 17 | S Squared Technology, LLC | 296K | $16.9M | -3.3% | 1.244% | 6.39% |
| 18 | MORGAN STANLEY | 294K | $16.7M | -3.9% | 1.234% | 0.00% |
| 19 | NORTHERN TRUST CORP | 267K | $15.2M | +4.2% | 1.122% | 0.00% |
| 20 | D. E. Shaw & Co., Inc. | 226K | $12.9M | +6.0% | 0.948% | 0.01% |
| 21 | NORDEA INVESTMENT MANAGEMENT AB | 214K | $12.0M | -4.5% | 0.901% | 0.01% |
| 22 | JUPITER ASSET MANAGEMENT LTD | 195K | $11.1M | 0.0% | 0.819% | 0.06% |
| 23 | PANAGORA ASSET MANAGEMENT INC | 175K | $10.0M | -0.5% | 0.734% | 0.04% |
| 24 | Hillsdale Investment Management Inc. | 174K | $9.9M | +3.6% | 0.733% | 0.27% |
| 25 | UBS Group AG | 169K | $9.6M | -3.8% | 0.709% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in PRLB — a direct measure of their conviction.
Filings activity in PRLB during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 257 | +12% | 65.86% | +7.55 pp | $1.24B | +13% |
| Q4 2025 | 229 | +11% | 58.31% | +1.08 pp | $1.10B | +1.9% |
| Q3 2025 | 207 | +4.5% | 57.23% | +11.67 pp | $1.07B | +26% |
| Q2 2025 | 198 | +5.9% | 45.56% | +5.41 pp | $856M | +13% |
| Q1 2025 | 187 | 4.1% | 40.15% | 3.64 pp | $754M | 8.3% |
| Q4 2024 | 195 | +2.1% | 43.79% | +10.53 pp | $822M | +32% |
| Q3 2024 | 191 | 6.8% | 33.26% | 2.13 pp | $625M | 6.0% |
| Q2 2024 | 205 | — | 35.39% | — | $665M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying PRLB stock.
Based on Q1 2026 13F filings, institutional ownership of Proto Labs, Inc. stands at 65.9%, held across 257 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of PRLB, with approximately 3,677,875 shares worth $0.21B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of PRLB, including RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for PRLB is 68 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
57 institutions opened new positions in PRLB during Q1 2026, while 29 fully exited. 164 added to existing positions and 34 trimmed.
PRLB institutional ownership rose by 7.55 percentage points quarter-over-quarter, with a net change of +28 holders.
The top 10 institutions account for 61.5% of all reported 13F value in PRLB, and the top 25 account for 81.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Proto Labs, Inc. (PRLB) Institutional Ownership