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Sarah Ketterer’s Biogen BIIB Stock Holding History

Sarah Ketterer’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 		$60.1M Sell
278,283
-2,500
-0.9% -$478K 0.65% 30
2026
Q1 		$51.5M Sell
280,783
-240,318
-46% -$44.3M 0.63% 35
2025
Q4 		$91.7M Sell
521,101
-46,417
-8% -$7.58M 1.26% 15
2025
Q3 		$79.5M Buy
567,518
+74,163
+15% +$10M 1.05% 18
2025
Q2 		$62M Buy
493,355
+59,838
+14% +$7.46M 0.98% 19
2025
Q1 		$59.3M Buy
433,517
+151,815
+54% +$21.7M 1.24% 20
2024
Q4 		$43.1M Buy
+281,702
New +$47.5M 0.98% 31
2016
Q4 		– Sell
-404,444
Closed -$142M – 85
2016
Q3 		$142M Sell
404,444
-84,819
-17% -$25.1M 2.61% 15
2016
Q2 		$135M Buy
+489,263
New +$129M 2.88% 13

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

Sarah Ketterer's BIIB Position: Q2 2026 in Review

Sarah Ketterer reduced its Biogen (BIIB) stake by 0.89% in Q2 2026, selling an estimated $478K and leaving 278,283 shares worth $60.1M. The position accounts for 0.65% of the portfolio, ranked #30.

Sarah Ketterer first reported a position in BIIB in Q2 2016 and has held it in 9 quarters since. The position peaked at $142M in Q3 2016. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Sarah Ketterer held 278,283 shares of Biogen worth $60.1M as of Q2 2026.
  • Sarah Ketterer sold 2,500 Biogen shares in Q2 2026, an estimated $478K.
  • Biogen made up 0.65% of Sarah Ketterer's portfolio in Q2 2026, its #30 holding.
  • Sarah Ketterer first reported a position in Biogen in Q2 2016 and has held it in 9 quarters since.
  • Sarah Ketterer's Biogen position peaked at $142M in Q3 2016.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Causeway Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.