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Of the 13 tracked institutions holding PRLB, 7 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +4.6pt. It's a gauge of who owns the name, not just how many.
Among the 13 tracked institutional investors we monitor, PRLB (PROTO LABS INC) is held with a combined value of $648.94M across 8,975,153 shares. The largest holder is BlackRock, Inc. with a position worth $317.58M. 7 funds increased their holdings. 5 funds reduced their position.
Total Institutional Value
$648.94M
Total Shares Held
8,975,153
Institutional Holders
13
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $317.58M | 0.00% | +5.9% |
| 2 | VANGUARD GROUP INC | $134.88M | 0.00% | -2.9% |
| 3 | STATE STREET CORP | $92.80M | 0.00% | +4.3% |
| 4 | RENAISSANCE TECHNOLOGIES LLC | $38.25M | 0.05% | -9.8% |
| 5 | FMR LLC | $36.08M | 0.00% | +4.8% |
| 6 | MILLENNIUM MANAGEMENT LLC | $7.58M | 0.01% | +259.9% |
| 7 | CITADEL ADVISORS LLC | $7.22M | 0.00% | +99.1% |
| 8 | AQR CAPITAL MANAGEMENT LLC | $4.35M | 0.00% | -3.3% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $3.18M | 0.00% | +17.6% |
| 10 | Point72 Asset Management, L.P. | $3.02M | 0.00% | +14.3% |
SEC Schedule 13D (activist) and 13G (passive) filings for PRLB. Filed when an investor acquires 5%+ ownership.
| Member | Type | Date |
|---|---|---|
| Thomas R Tillis | Sell | Feb 13, 2015 |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of PRLB with a position worth $317.58M, representing 0.00% of their portfolio. In total, 13 institutional investors hold PRLB with a combined value of $648.94M.
Institutional investors hold $648.94M worth of PRLB stock across 13 positions. The largest institutional holder is BlackRock, Inc. with $317.58M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For PRLB, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their PRLB positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$89.69
2026-10-21
YTD
+74.7%
83% of 52-week range
