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Rakuten Investment Management’s Biogen BIIB Stock Holding History

Rakuten Investment Management’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 		$5.22M Buy
24,097
+2,319
+11% +$444K 0.02% 276
2026
Q1 		$4.08M Buy
21,778
+2,483
+13% +$458K 0.01% 291
2025
Q4 		$3.41M Sell
19,295
-179,277
-90% -$29.3M 0.01% 342
2025
Q3 		$99.1M Buy
+198,572
New +$26.8M 0.35% 16
2025
Q1 		$2.59M Buy
+18,708
New +$2.67M 0.01% 325
2024
Q3 		$2.25M Buy
11,566
+2,917
+34% +$610K 0.01% 222
2024
Q2 		$1.98M Buy
8,649
+3,270
+61% +$711K 0.01% 189
2024
Q1 		$1.16M Buy
5,379
+5,021
+1,403% +$1.18M 0.01% 203
2023
Q4 		$93.3K Buy
+358
New +$87.9K ﹤0.01% 198

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

Rakuten Investment Management's BIIB Position: Q2 2026 in Review

Rakuten Investment Management increased its Biogen (BIIB) stake by 11% in Q2 2026, buying an estimated $444K and bringing the position to 24,097 shares worth $5.22M. The position accounts for 0.02% of the portfolio, ranked #276.

Rakuten Investment Management first reported a position in BIIB in Q4 2023 and has held it in 9 quarters since. The position peaked at $99.1M in Q3 2025. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Rakuten Investment Management held 24,097 shares of Biogen worth $5.22M as of Q2 2026.
  • Rakuten Investment Management bought 2,319 Biogen shares in Q2 2026, an estimated $444K.
  • Biogen made up 0.02% of Rakuten Investment Management's portfolio in Q2 2026, its #276 holding.
  • Rakuten Investment Management first reported a position in Biogen in Q4 2023 and has held it in 9 quarters since.
  • Rakuten Investment Management's Biogen position peaked at $99.1M in Q3 2025.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Rakuten Investment Management's 13F filing for Q2 2026, filed 18 Aug 2026.