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EcoR1 Capital’s MacroGenics MGNX Stock Holding History

EcoR1 Capital’s Portfolio MGNX Stock Details MGNX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-1,602,717
Closed -$1.94M – 37
2025
Q2 		$1.94M Buy
+1,602,717
New +$2.32M 0.11% 34
2024
Q4 		– Sell
-56,018
Closed -$184K – 67
2024
Q3 		$184K Buy
+56,018
New +$218K 0.01% 62
2023
Q2 		– Sell
-619,192
Closed -$4.44M – 62
2023
Q1 		$4.44M Sell
619,192
-498,263
-45% -$3M 0.14% 40
2022
Q4 		$7.5M Buy
1,117,455
+186,500
+20% +$1.02M 0.23% 44
2022
Q3 		$3.22M Buy
+930,955
New +$3.56M 0.1% 56
2018
Q4 		– Sell
-1,481,086
Closed -$31.8M – 56
2018
Q3 		$31.8M Buy
1,481,086
+30,480
+2% +$650K 2.86% 9
2018
Q2 		$30M Hold
1,450,606
– – 2.85% 10
2018
Q1 		$36.5M Buy
1,450,606
+309,812
+27% +$7.53M 3.66% 9
2017
Q4 		$21.7M Buy
+1,140,794
New +$21.3M 2.44% 13
2015
Q1 		– Sell
-453,626
Closed -$15.9M – 25
2014
Q4 		$15.9M Buy
+453,626
New +$11.3M 8.05% 5

Other funds holding MGNX

BG
Bellevue Group Kuesnacht, Switzerland $4.2B AUM 54.85% 1-Year Est. Return
AC
Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

EcoR1 Capital's MGNX Position: Q3 2025 in Review

EcoR1 Capital sold out of MacroGenics (MGNX) in Q3 2025, closing a stake of 1,602,717 shares — an estimated $1.94M sold.

EcoR1 Capital first reported a position in MGNX in Q4 2014 and held it in 10 quarters. The position peaked at $36.5M in Q1 2018. 104 funds tracked by Wall St. Rank hold MGNX as of Q3 2025.

  • EcoR1 Capital reported no remaining MacroGenics position as of Q3 2025 after selling out during the quarter.
  • EcoR1 Capital sold 1,602,717 MacroGenics shares in Q3 2025, an estimated $1.94M.
  • EcoR1 Capital first reported a position in MacroGenics in Q4 2014 and held it in 10 quarters.
  • EcoR1 Capital's MacroGenics position peaked at $36.5M in Q1 2018.
  • 104 funds tracked by Wall St. Rank held MacroGenics as of Q3 2025.

Based on EcoR1 Capital's 13F filing for Q3 2025, filed 14 Nov 2025.