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TFB Advisors’s Biogen BIIB Stock Holding History

TFB 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
Q2 		$524K Buy
2,424
+1
+0% +$191 0.23% 111
2026
Q1 		$444K Sell
2,423
-25
-1% -$4.61K 0.23% 93
2025
Q4 		$431K Hold
2,448
– – 0.12% 184
2025
Q3 		$356K Sell
2,448
-23
-0.9% -$3.11K 0.1% 214
2025
Q2 		$310K Buy
2,471
+32
+1% +$3.99K 0.08% 254
2025
Q1 		$334K Buy
2,439
+5
+0.2% +$715 0.1% 231
2024
Q4 		$372K Sell
2,434
-13
-0.5% -$2.19K 0.11% 210
2024
Q3 		$474K Sell
2,447
-2
-0.1% -$418 0.14% 173
2024
Q2 		$568K Sell
2,449
-1
-0% -$217 0.18% 119
2024
Q1 		$530K Buy
2,450
+50
+2% +$11.7K 0.19% 116
2023
Q4 		$621K Sell
2,400
-44
-2% -$10.8K 0.32% 71
2023
Q3 		$628K Buy
2,444
+2
+0.1% +$535 0.76% 38
2023
Q2 		$696K Buy
+2,442
New +$727K 0.3% 79

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

TFB Advisors's BIIB Position: Q2 2026 in Review

TFB Advisors increased its Biogen (BIIB) stake by 0.04% in Q2 2026, buying an estimated $191 and bringing the position to 2,424 shares worth $524K. The position accounts for 0.23% of the portfolio, ranked #111.

TFB Advisors first reported a position in BIIB in Q2 2023 and has held it in 13 quarters since. The position peaked at $696K in Q2 2023. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • TFB Advisors held 2,424 shares of Biogen worth $524K as of Q2 2026.
  • TFB Advisors bought 1 Biogen share in Q2 2026, an estimated $191.
  • Biogen made up 0.23% of TFB Advisors's portfolio in Q2 2026, its #111 holding.
  • TFB Advisors first reported a position in Biogen in Q2 2023 and has held it in 13 quarters since.
  • TFB Advisors's Biogen position peaked at $696K in Q2 2023.
  • 1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on TFB Advisors's 13F filing for Q2 2026, filed 6 Aug 2026.