SSG
BIIB icon

Summit Securities Group’s Biogen BIIB Stock Holding History

Summit Securities Group’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 		$7.35K Buy
34
+10
+42% +$1.91K ﹤0.01% 899
2026
Q1 		$4.4K Sell
24
-195
-89% -$35.9K ﹤0.01% 822
2025
Q4 		$38.5K Buy
219
+170
+347% +$27.8K 0.01% 669
2025
Q3 		$6.86K Buy
+49
New +$6.62K ﹤0.01% 904
2025
Q1 		– Sell
-24
Closed -$3.67K – 813
2024
Q4 		$3.67K Sell
24
-476
-95% -$80.3K ﹤0.01% 528
2024
Q3 		$97K Buy
500
+481
+2,532% +$101K 0.03% 186
2024
Q2 		$4K Sell
19
-781
-98% -$170K ﹤0.01% 507
2024
Q1 		$173K Sell
800
-112
-12% -$26.2K 0.03% 164
2023
Q4 		$236K Buy
912
+896
+5,600% +$220K 0.02% 245
2023
Q3 		$4K Sell
16
-32
-67% -$8.56K ﹤0.01% 472
2023
Q2 		$14K Buy
+48
New +$14.3K ﹤0.01% 716
2022
Q4 		– Sell
-571
Closed -$152K – 1158
2022
Q3 		$152K Buy
+571
New +$121K 0.01% 460
2022
Q2 		– Sell
-664
Closed -$136K – 955
2022
Q1 		$140K Buy
+664
New +$144K 0.02% 445
2016
Q3 		– Sell
-6,363
Closed -$1.54M – 162
2016
Q2 		$1.54M Sell
6,363
-215
-3% -$56.7K 0.82% 26
2016
Q1 		$1.71M Buy
+6,578
New +$1.74M 1.2% 18

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

Summit Securities Group's BIIB Position: Q2 2026 in Review

Summit Securities Group increased its Biogen (BIIB) stake by 42% in Q2 2026, buying an estimated $1.91K and bringing the position to 34 shares worth $7.35K. The position accounts for ﹤0.01% of the portfolio, ranked #899.

Summit Securities Group first reported a position in BIIB in Q1 2016 and has held it in 15 quarters since. The position peaked at $1.71M in Q1 2016. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Summit Securities Group held 34 shares of Biogen worth $7.35K as of Q2 2026.
  • Summit Securities Group bought 10 Biogen shares in Q2 2026, an estimated $1.91K.
  • Biogen made up ﹤0.01% of Summit Securities Group's portfolio in Q2 2026, its #899 holding.
  • Summit Securities Group first reported a position in Biogen in Q1 2016 and has held it in 15 quarters since.
  • Summit Securities Group's Biogen position peaked at $1.71M in Q1 2016.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Summit Securities Group's 13F filing for Q2 2026, filed 3 Aug 2026.