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CSM Advisors’s Biogen BIIB Stock Holding History

CSM Advisors’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
Q2 		$1.04M Sell
4,815
-493
-9% -$94.3K 0.02% 342
2026
Q1 		$974K Sell
5,308
-173
-3% -$31.9K 0.02% 335
2025
Q4 		$964K Sell
5,481
-2,490
-31% -$407K 0.03% 328
2025
Q3 		$1.12M Sell
7,971
-19,488
-71% -$2.63M 0.03% 334
2025
Q2 		$3.45M Sell
27,459
-400
-1% -$49.8K 0.1% 242
2025
Q1 		$3.81M Sell
27,859
-300
-1% -$42.9K 0.21% 75
2024
Q4 		$4.3M Buy
28,159
+50
+0.2% +$8.43K 0.2% 76
2024
Q3 		$5.45M Sell
28,109
-300
-1% -$62.8K 0.36% 76
2024
Q2 		$6.59M Hold
28,409
– – 0.46% 63
2024
Q1 		$6.13M Buy
28,409
+270
+1% +$63.2K 0.4% 72
2023
Q4 		$7.28M Sell
28,139
-87
-0.3% -$21.4K 0.52% 63
2023
Q3 		$7.25M Sell
28,226
-590
-2% -$158K 0.63% 51
2023
Q2 		$8.2M Sell
28,816
-743
-3% -$221K 0.62% 47
2023
Q1 		$8.22M Buy
29,559
+1,800
+6% +$498K 0.71% 44
2022
Q4 		$7.69M Sell
27,759
-310
-1% -$87.6K 0.73% 39
2022
Q3 		$7.5M Sell
28,069
-9,650
-26% -$2.05M 0.82% 36
2022
Q2 		$7.69M Buy
37,719
+158
+0.4% +$32.3K 0.7% 44
2022
Q1 		$7.91M Sell
37,561
-2,900
-7% -$631K 0.54% 57
2021
Q4 		$9.71M Sell
40,461
-350
-0.9% -$90K 0.64% 50
2021
Q3 		$11.5M Sell
40,811
-10
-0% -$3.28K 0.85% 36
2021
Q2 		$14.1M Sell
40,821
-410
-1% -$124K 0.93% 31
2021
Q1 		$11.5M Buy
+41,231
New +$11.1M 1.62% 24

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

CSM Advisors's BIIB Position: Q2 2026 in Review

CSM Advisors reduced its Biogen (BIIB) stake by 9.3% in Q2 2026, selling an estimated $94.3K and leaving 4,815 shares worth $1.04M. The position accounts for 0.02% of the portfolio, ranked #342.

CSM Advisors first reported a position in BIIB in Q1 2021 and has held it in 22 quarters since. The position peaked at $14.1M in Q2 2021. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • CSM Advisors held 4,815 shares of Biogen worth $1.04M as of Q2 2026.
  • CSM Advisors sold 493 Biogen shares in Q2 2026, an estimated $94.3K.
  • Biogen made up 0.02% of CSM Advisors's portfolio in Q2 2026, its #342 holding.
  • CSM Advisors first reported a position in Biogen in Q1 2021 and has held it in 22 quarters since.
  • CSM Advisors's Biogen position peaked at $14.1M in Q2 2021.
  • 1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on CSM Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.