KRS
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Kentucky Retirement Systems’s Biogen BIIB Stock Holding History

Kentucky Retirement Systems’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
2026
Q1 		$5.46M Buy
19,502
+10,331
+113% +$1.9M 0.4% 58
2025
Q4 		$1.61M Hold
9,171
– – 0.04% 336
2025
Q3 		$1.28M Sell
9,171
-162
-2% -$21.9K 0.04% 393
2025
Q2 		$1.17M Sell
9,333
-612
-6% -$76.3K 0.03% 404
2025
Q1 		$1.36M Sell
9,945
-65
-0.6% -$9.29K 0.04% 377
2024
Q4 		$1.53M Sell
10,010
-138
-1% -$23.3K 0.05% 332
2024
Q3 		$1.97M Sell
10,148
-824
-8% -$172K 0.06% 295
2024
Q2 		$2.54M Sell
10,972
-32
-0.3% -$6.95K 0.07% 248
2024
Q1 		$2.37M Sell
11,004
-589
-5% -$138K 0.07% 266
2023
Q4 		$3M Sell
11,593
-455
-4% -$112K 0.09% 216
2023
Q3 		$3.1M Buy
12,048
+410
+4% +$110K 0.11% 188
2023
Q2 		$3.31M Buy
11,638
+252
+2% +$75K 0.11% 182
2023
Q1 		$3.17M Sell
11,386
-23
-0.2% -$6.36K 0.12% 183
2022
Q4 		$3.16M Buy
11,409
+50
+0.4% +$14.1K 0.12% 179
2022
Q3 		$3.03M Buy
11,359
+490
+5% +$104K 0.13% 166
2022
Q2 		$2.22M Buy
10,869
+1,506
+16% +$308K 0.09% 225
2022
Q1 		$1.97M Buy
9,363
+524
+6% +$114K 0.08% 250
2021
Q4 		$2.12M Buy
8,839
+139
+2% +$35.7K 0.09% 239
2021
Q3 		$2.46M Sell
8,700
-67
-0.8% -$22K 0.12% 178
2021
Q2 		$3.04M Sell
8,767
-428
-5% -$130K 0.14% 147
2021
Q1 		$2.57M Sell
9,195
-60
-0.6% -$16.2K 0.13% 159
2020
Q4 		$2.27M Buy
9,255
+6
+0.1% +$1.55K 0.12% 167
2020
Q3 		$2.62M Buy
9,249
+164
+2% +$45.7K 0.16% 136
2020
Q2 		$2.43M Sell
9,085
-3,238
-26% -$973K 0.17% 135
2020
Q1 		$3.9M Buy
12,323
+3,040
+33% +$923K 0.27% 90
2019
Q4 		$2.75M Sell
9,283
-168
-2% -$46.6K 0.2% 116
2019
Q3 		$2.2M Buy
9,451
+421
+5% +$98K 0.17% 139
2019
Q2 		$2.11M Buy
9,030
+430
+5% +$99.3K 0.19% 126
2019
Q1 		$2.03M Sell
8,600
-164
-2% -$51.6K 0.2% 115
2018
Q4 		$2.64M Buy
8,764
+186
+2% +$59.4K 0.29% 80
2018
Q3 		$3.03M Sell
8,578
-381
-4% -$131K 0.29% 77
2018
Q2 		$2.6M Sell
8,959
-2,082
-19% -$585K 0.27% 83
2018
Q1 		$3.02M Sell
11,041
-1,997
-15% -$620K 0.26% 93
2017
Q4 		$4.15M Sell
13,038
-78
-0.6% -$25K 0.3% 79
2017
Q3 		$4.11M Sell
13,116
-578
-4% -$171K 0.31% 78
2017
Q2 		$3.72M Sell
13,694
-148
-1% -$39.1K 0.28% 86
2017
Q1 		$3.79M Sell
13,842
-1,946
-12% -$550K 0.29% 82
2016
Q4 		$4.48M Sell
15,788
-959
-6% -$284K 0.32% 73
2016
Q3 		$5.24M Sell
16,747
-1,881
-10% -$557K 0.35% 64
2016
Q2 		$4.5M Sell
18,628
-1,462
-7% -$385K 0.29% 82
2016
Q1 		$5.23M Buy
20,090
+3,159
+19% +$834K 0.32% 73
2015
Q4 		$5.19M Buy
16,931
+794
+5% +$228K 0.38% 61
2015
Q3 		$4.71M Buy
16,137
+265
+2% +$87.5K 0.41% 58
2015
Q2 		$6.41M Buy
15,872
+81
+0.5% +$32.5K 0.52% 44
2015
Q1 		$6.67M Sell
15,791
-1,764
-10% -$695K 0.54% 42
2014
Q4 		$5.96M Sell
17,555
-816
-4% -$264K 0.44% 51
2014
Q3 		$6.08M Buy
+18,371
New +$6.06M 0.45% 48
2014
Q1 		$5.99M Buy
19,595
+93
+0.5% +$29.5K 0.43% 53
2013
Q4 		$5.46M Sell
19,502
-240
-1% -$62.1K 0.4% 58
2013
Q3 		$4.75M Buy
+19,742
New +$4.42M 0.38% 60

Other funds holding BIIB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Kentucky Retirement Systems's BIIB Position: Q1 2026 in Review

Kentucky Retirement Systems increased its Biogen (BIIB) stake by 113% in Q1 2026, buying an estimated $1.9M and bringing the position to 19,502 shares worth $5.46M. The position accounts for 0.4% of the portfolio, ranked #58.

Kentucky Retirement Systems first reported a position in BIIB in Q3 2013 and has held it in 50 quarters since. The position peaked at $6.67M in Q1 2015. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Kentucky Retirement Systems held 19,502 shares of Biogen worth $5.46M as of Q1 2026.
  • Kentucky Retirement Systems bought 10,331 Biogen shares in Q1 2026, an estimated $1.9M.
  • Biogen made up 0.4% of Kentucky Retirement Systems's portfolio in Q1 2026, its #58 holding.
  • Kentucky Retirement Systems first reported a position in Biogen in Q3 2013 and has held it in 50 quarters since.
  • Kentucky Retirement Systems's Biogen position peaked at $6.67M in Q1 2015.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Kentucky Retirement Systems's 13F filing for Q1 2026, filed 19 May 2026.