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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
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

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

CSM Advisors's BIIB Position: Q1 2026 in Review

CSM Advisors reduced its Biogen (BIIB) stake by 3.2% in Q1 2026, selling an estimated $31.9K and leaving 5,308 shares worth $974K. The position accounts for 0.02% of the portfolio, ranked #335.

CSM Advisors first reported a position in BIIB in Q1 2021 and has held it in 21 quarters since. The position peaked at $14.1M in Q2 2021. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • CSM Advisors held 5,308 shares of Biogen worth $974K as of Q1 2026.
  • CSM Advisors sold 173 Biogen shares in Q1 2026, an estimated $31.9K.
  • Biogen made up 0.02% of CSM Advisors's portfolio in Q1 2026, its #335 holding.
  • CSM Advisors first reported a position in Biogen in Q1 2021 and has held it in 21 quarters since.
  • CSM Advisors's Biogen position peaked at $14.1M in Q2 2021.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on CSM Advisors's 13F filing for Q1 2026, filed 15 May 2026.