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GAMMA Investing’s Biogen BIIB Stock Holding History

GAMMA Investing’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 		$1.4M Buy
6,462
+469
+8% +$89.7K 0.05% 303
2026
Q1 		$1.1M Buy
5,993
+477
+9% +$87.9K 0.05% 318
2025
Q4 		$971K Buy
5,516
+1,173
+27% +$192K 0.05% 322
2025
Q3 		$608K Buy
4,343
+756
+21% +$102K 0.03% 441
2025
Q2 		$450K Buy
3,587
+1,725
+93% +$215K 0.03% 522
2025
Q1 		$255K Buy
1,862
+1,464
+368% +$209K 0.02% 658
2024
Q4 		$60.9K Sell
398
-428
-52% -$72.2K 0.01% 1501
2024
Q3 		$160K Sell
826
-437
-35% -$91.4K 0.02% 723
2024
Q2 		$293K Buy
1,263
+755
+149% +$164K 0.04% 396
2024
Q1 		$110K Buy
508
+22
+5% +$5.15K 0.02% 615
2023
Q4 		$120K Buy
+486
New +$119K 0.03% 470

Other funds holding BIIB

Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return
AIM
Artemis Investment Management Edinburgh, United Kingdom $11.2B AUM 80.72% 1-Year Est. Return
Swedbank
Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return
AAMU
AEGON Asset Management (UK) Edinburgh, United Kingdom $9.38B AUM 48.94% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return
ADEF
Adams Diversified Equity Fund Baltimore, Maryland $3.27B AUM 45.57% 1-Year Est. Return
Handelsbanken Fonder
Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return
Mirae Asset Global Investments
Mirae Asset Global Investments Seoul, South Korea $67.7B AUM 51.91% 1-Year Est. Return
GIA
Gateway Investment Advisers Cincinnati, Ohio $10.1B AUM 40.26% 1-Year Est. Return
NGM
North Growth Management Vancouver, British Columbia, Canada $780M AUM 102.77% 1-Year Est. Return

GAMMA Investing's BIIB Position: Q2 2026 in Review

GAMMA Investing increased its Biogen (BIIB) stake by 7.8% in Q2 2026, buying an estimated $89.7K and bringing the position to 6,462 shares worth $1.4M. The position accounts for 0.05% of the portfolio, ranked #303.

GAMMA Investing first reported a position in BIIB in Q4 2023 and has held it in 11 quarters since. 241 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • GAMMA Investing held 6,462 shares of Biogen worth $1.4M as of Q2 2026.
  • GAMMA Investing bought 469 Biogen shares in Q2 2026, an estimated $89.7K.
  • Biogen made up 0.05% of GAMMA Investing's portfolio in Q2 2026, its #303 holding.
  • GAMMA Investing first reported a position in Biogen in Q4 2023 and has held it in 11 quarters since.
  • 241 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on GAMMA Investing's 13F filing for Q2 2026, filed 7 Jul 2026.