PRLB — PROTO LABS INC
Public company
InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.
Sourced from SEC EDGAR public filings
Why are billionaires buying PRLB?
Built from public SEC filings and public economic data. Not a recommendation.
Why? — Evidence & Confidence ▾
Of 2 tracked investors who changed their PRLB position last quarter, 0 bought and 2 sold (0% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 56/100 in a Overheat regime).
- +4 tracked investors reported holding PRLB at their latest filing
- +Macro Health is 56/100 in a Overheat regime — historically acceptable for this sectorsource
- −2 tracked investors reduced or exited last quarter (1 reduced, 1 sold out)
- −13F data is disclosed up to 45 days after quarter end — positions may have changed since
- · 13F disclosure lag (up to 45 days)
- · Tracked investors are a sample, not the whole market
- · Sector regime fit is a historical average, not a guarantee
Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/18/2026.
About PROTO LABS INC (PRLB)
PROTO LABS INC (PRLB) appears in the most recent 13F filings of 4 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $8M. Across recent filings, tracked investors recorded 2 new positions, 1 increased, 9 reduced, and 1 exited. All data sourced from SEC 13F filings.
Based on recent institutional activity in PRLB
How many top investors track PRLB
A small number of top investors own this.
PRLB Ownership Composition
How PROTO LABS INC is held across tracked investor types, based on reported 13F positions.
- Multi-Strategy / Quant86.6%
- Growth & Innovation13.4%
Tracked investors currently reporting PRLB
1 tracked investor has since exited this position — listed separately below.
- Ken GriffinJun 30, 2026Citadel AdvisorsShares98.8KValue$8.1M% Portfolio0.00%
- Izzy EnglanderJun 30, 2026Millennium ManagementShares93KValue$7.6M% Portfolio0.00%
- Cathie WoodJun 30, 2026ARK Investment ManagementShares35.4KValue$2.9M% Portfolio0.02%
- Steve CohenJun 30, 2026Point72 Asset ManagementShares37KValue$3M% Portfolio0.00%
Previously held PRLB
These investors reported PRLB in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.
| Investor | Firm | Last reported shares | Value then | Last held |
|---|---|---|---|---|
| Ray Dalio | Bridgewater Associates | 7.7K | $438.5K | Mar 31, 2026 |
Recent activity
- Reduced$6.9M(-0.62%)Jan 17, 2024
- Reduced$4.9M(-23.48%)Apr 18, 2024
- Reduced$4.1M(-2.56%)Jul 26, 2024
- Reduced$3.6M(-6.92%)Oct 31, 2024
- Increased$5M(3.84%)Feb 4, 2025
- Reduced$3.1M(-32.27%)May 7, 2025
- Reduced$3.2M(-8.67%)Jul 30, 2025
- Reduced$2.9M(-20.97%)Feb 11, 2026
- Reduced$2.6M(-19.46%)May 12, 2026
- Reduced$2.9M(-22.51%)Aug 14, 2026
- New$438.5KMay 15, 2026
- Sold$0(-100.00%)Aug 14, 2026
- New$4.7MOct 18, 2023
Frequently asked questions
- How many institutional investors hold PRLB?
- 4 tracked institutional investors disclosed a position in PRLB (PROTO LABS INC) in their most recent 13F filing.
- Who is the largest institutional holder of PRLB?
- Ken Griffin, Citadel Advisors, holds the largest disclosed position in PRLB, valued at $8M.
- Did institutional ownership of PRLB increase or decrease?
- Across recent 13F filings, tracked investors recorded 2 new positions, 1 increased, 9 reduced, and 1 fully exited PRLB.
- Where does this PRLB ownership data come from?
- SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.