Protolabs
PRLB
263 hedge funds and large institutions have $1.26B invested in Protolabs in 2026 Q1 according to their latest regulatory filings, with 53 funds opening new positions, 75 increasing their positions, 80 reducing their positions, and 20 closing their positions.
165% more first-time investments, than exits
New positions opened: 53 | Existing positions closed: 20
14% more capital invested
Capital invested by funds: $1.1B → $1.26B (+$158M)
12% more funds holding
Funds holding: 234 → 263 (+29)
1.01% more ownership
Funds ownership: 91.93% → 92.94% (+1%)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
6% less repeat investments, than reductions
Existing positions increased: 75 | Existing positions reduced: 80
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$17.4M |
| 2 |
Prudential Financial
Newark,
New Jersey
|
+$12.6M |
| 3 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
+$7.76M |
| 4 |
Marshall Wace
London,
United Kingdom
|
+$3.97M |
| 5 |
EI
EAM Investors
Solana Beach,
California
|
+$3.82M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCMNY
Rubric Capital Management (New York)
New York
|
-$37M |
| 2 |
DGI
Disciplined Growth Investors
Minneapolis,
Minnesota
|
-$10.2M |
| 3 |
BCM
Bridgeway Capital Management
Houston,
Texas
|
-$5.33M |
| 4 |
Millennium Management
New York
|
-$4.39M |
| 5 |
Jane Street
New York
|
-$3.09M |
PRLB Hedge Fund Activity: Q1 2026 in Review
263 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Protolabs (PRLB) for Q1 2026, worth a combined $1.26B — up 14% from $1.1B a quarter earlier.
Buyers outnumbered sellers: 53 funds opened new PRLB positions and 20 closed out — a net gain of 33 holders — while 75 added to existing stakes and 80 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $17.4M. The largest seller was Rubric Capital Management (New York), cutting an estimated $37M.
- 263 institutional investors held Protolabs (PRLB) as of Q1 2026, up from 234 in Q4 2025.
- Funds reported $1.26B of Protolabs stock for Q1 2026, up 14% quarter-over-quarter.
- 53 funds opened new Protolabs positions in Q1 2026 and 20 closed out, a net change of +33 holders.
- The largest Protolabs buyer in Q1 2026 was Fidelity Investments, an estimated $17.4M added.
- The largest Protolabs seller in Q1 2026 was Rubric Capital Management (New York), an estimated $37M sold.
Based on aggregated 13F filings for Q1 2026.