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Essex Investment Management’s Protolabs PRLB Stock Holding History

Essex Investment Management’s Portfolio PRLB Stock Details PRLB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-15,504
Closed -$784K – 325
2025
Q4 		$784K Sell
15,504
-5,382
-26% -$275K 0.12% 153
2025
Q3 		$1.04M Buy
+20,886
New +$957K 0.16% 140
2022
Q3 		– Sell
-12,089
Closed -$578K – 433
2022
Q2 		$578K Sell
12,089
-504
-4% -$23.4K 0.09% 241
2022
Q1 		$666K Sell
12,593
-707
-5% -$37.2K 0.08% 252
2021
Q4 		$683K Buy
+13,300
New +$785K 0.08% 256
2021
Q2 		– Sell
-5,254
Closed -$640K – 460
2021
Q1 		$640K Buy
+5,254
New +$874K 0.08% 269
2020
Q3 		– Sell
-4,374
Closed -$492K – 498
2020
Q2 		$492K Buy
+4,374
New +$449K 0.08% 259
2016
Q4 		– Sell
-6,417
Closed -$384K – 364
2016
Q3 		$384K Buy
+6,417
New +$369K 0.06% 276
2014
Q1 		– Sell
-11,000
Closed -$783K – 367
2013
Q4 		$783K Buy
+11,000
New +$853K 0.11% 224
2013
Q3 		– Sell
-33,578
Closed -$2.18M – 380
2013
Q2 		$2.18M Buy
+33,578
New +$1.8M 0.39% 83

Other funds holding PRLB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
DGI
Disciplined Growth Investors Minneapolis, Minnesota $4.89B AUM 33.85% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
ACM
American Capital Management New York $1.86B AUM 20.23% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return

Essex Investment Management's PRLB Position: Q1 2026 in Review

Essex Investment Management sold out of Protolabs (PRLB) in Q1 2026, closing a stake of 15,504 shares — an estimated $784K sold.

Essex Investment Management first reported a position in PRLB in Q2 2013 and held it in 10 quarters. The position peaked at $2.18M in Q2 2013. 262 funds tracked by Wall St. Rank hold PRLB as of Q1 2026.

  • Essex Investment Management reported no remaining Protolabs position as of Q1 2026 after selling out during the quarter.
  • Essex Investment Management sold 15,504 Protolabs shares in Q1 2026, an estimated $784K.
  • Essex Investment Management first reported a position in Protolabs in Q2 2013 and held it in 10 quarters.
  • Essex Investment Management's Protolabs position peaked at $2.18M in Q2 2013.
  • 262 funds tracked by Wall St. Rank held Protolabs as of Q1 2026.

Based on Essex Investment Management's 13F filing for Q1 2026, filed 11 May 2026.