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Employees Retirement System of Texas’s Biogen BIIB Stock Holding History

Employees Retirement System of Texas’s Portfolio BIIB Stock Details BIIB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-1,467
Closed -$184K – 514
2025
Q2 		$184K Buy
+1,467
New +$183K ﹤0.01% 374
2023
Q3 		– Sell
-108,000
Closed -$30.8M – 302
2023
Q2 		$30.8M Buy
108,000
+35,000
+48% +$10.4M 0.42% 82
2023
Q1 		$20.3M Sell
73,000
-27,000
-27% -$7.47M 0.3% 97
2022
Q4 		$27.7M Buy
100,000
+15,000
+18% +$4.24M 0.4% 79
2022
Q3 		$22.7M Buy
85,000
+56,200
+195% +$11.9M 0.35% 89
2022
Q2 		$5.87M Hold
28,800
– – 0.08% 268
2022
Q1 		$6.07M Buy
28,800
+5,000
+21% +$1.09M 0.07% 285
2021
Q4 		$5.71M Buy
23,800
+3,000
+14% +$771K 0.06% 308
2021
Q3 		$5.89M Sell
20,800
-2,100
-9% -$688K 0.07% 307
2021
Q2 		$7.93M Sell
22,900
-8,900
-28% -$2.7M 0.1% 243
2021
Q1 		$8.9M Sell
31,800
-2,000
-6% -$539K 0.11% 219
2020
Q4 		$8.28M Hold
33,800
– – 0.13% 184
2020
Q3 		$9.59M Sell
33,800
-2,000
-6% -$558K 0.14% 177
2020
Q2 		$9.58M Buy
35,800
+15,000
+72% +$4.51M 0.15% 168
2020
Q1 		$6.58M Hold
20,800
– – 0.13% 188
2019
Q4 		$6.17M Sell
20,800
-6,000
-22% -$1.66M 0.1% 248
2019
Q3 		$6.24M Sell
26,800
-26,200
-49% -$6.1M 0.1% 236
2019
Q2 		$12.4M Sell
53,000
-1,000
-2% -$231K 0.19% 123
2019
Q1 		$12.8M Sell
54,000
-18,000
-25% -$5.67M 0.19% 119
2018
Q4 		$21.7M Sell
72,000
-1,400
-2% -$447K 0.34% 56
2018
Q3 		$25.9M Buy
73,400
+19,700
+37% +$6.78M 0.35% 58
2018
Q2 		$15.6M Sell
53,700
-8,000
-13% -$2.25M 0.21% 100
2018
Q1 		$16.9M Sell
61,700
-11,200
-15% -$3.48M 0.23% 90
2017
Q4 		$23.2M Sell
72,900
-2,400
-3% -$770K 0.29% 67
2017
Q3 		$23.6M Buy
75,300
+2,500
+3% +$740K 0.31% 64
2017
Q2 		$19.8M Sell
72,800
-16,000
-18% -$4.23M 0.27% 72
2017
Q1 		$24.3M Buy
88,800
+1,300
+1% +$368K 0.33% 54
2016
Q4 		$24.8M Buy
87,500
+38,600
+79% +$11.4M 0.34% 58
2016
Q3 		$15.3M Buy
48,900
+18,000
+58% +$5.33M 0.21% 114
2016
Q2 		$7.47M Buy
30,900
+7,000
+29% +$1.84M 0.1% 238
2016
Q1 		$6.22M Buy
23,900
+11,000
+85% +$2.91M 0.09% 276
2015
Q4 		$3.95M Sell
12,900
-6,300
-33% -$1.81M 0.05% 400
2015
Q3 		$5.6M Sell
19,200
-18,900
-50% -$6.24M 0.08% 291
2015
Q2 		$15.4M Buy
38,100
+5,000
+15% +$2.01M 0.2% 108
2015
Q1 		$14M Sell
33,100
-56,000
-63% -$22.1M 0.18% 130
2014
Q4 		$30.2M Buy
89,100
+11,000
+14% +$3.56M 0.38% 58
2014
Q3 		$25.8M Buy
78,100
+12,270
+19% +$4.05M 0.34% 67
2014
Q2 		$20.8M Sell
65,830
-28,170
-30% -$8.48M 0.27% 80
2014
Q1 		$28.8M Buy
94,000
+13,000
+16% +$4.13M 0.38% 57
2013
Q4 		$22.7M Buy
81,000
+4,470
+6% +$1.16M 0.29% 73
2013
Q3 		$18.4M Sell
76,530
-10,470
-12% -$2.34M 0.23% 86
2013
Q2 		$18.7M Buy
+87,000
New +$18.6M 0.22% 82

Other funds holding BIIB

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

Employees Retirement System of Texas's BIIB Position: Q3 2025 in Review

Employees Retirement System of Texas sold out of Biogen (BIIB) in Q3 2025, closing a stake of 1,467 shares — an estimated $184K sold.

Employees Retirement System of Texas first reported a position in BIIB in Q2 2013 and held it in 42 quarters. The position peaked at $30.8M in Q2 2023. 906 funds tracked by Wall St. Rank hold BIIB as of Q3 2025.

  • Employees Retirement System of Texas reported no remaining Biogen position as of Q3 2025 after selling out during the quarter.
  • Employees Retirement System of Texas sold 1,467 Biogen shares in Q3 2025, an estimated $184K.
  • Employees Retirement System of Texas first reported a position in Biogen in Q2 2013 and held it in 42 quarters.
  • Employees Retirement System of Texas's Biogen position peaked at $30.8M in Q2 2023.
  • 906 funds tracked by Wall St. Rank held Biogen as of Q3 2025.

Based on Employees Retirement System of Texas's 13F filing for Q3 2025, filed 13 Nov 2025.