First County Bank
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First County Bank’s Biogen BIIB Stock Holding History

First County Bank’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
Q3 		$885K Sell
3,918
-15
-0.4% -$3.18K 0.41% 68
2026
Q2 		$850K Sell
3,933
-233
-6% -$44.6K 0.4% 71
2026
Q1 		$764K Sell
4,166
-246
-6% -$45.3K 0.41% 70
2025
Q4 		$776K Sell
4,412
-65
-1% -$10.6K 0.41% 71
2025
Q3 		$627K Hold
4,477
– – 0.32% 86
2025
Q2 		$562K Sell
4,477
-295
-6% -$36.8K 0.3% 93
2025
Q1 		$653K Buy
+4,772
New +$682K 0.36% 87

Other funds holding BIIB

Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $83.2B AUM 35.34% 1-Year Est. Return
Artemis Investment Management
Artemis Investment Management Edinburgh, United Kingdom $11.5B AUM 61.77% 1-Year Est. Return
KBC Group
KBC Group Brussels, Belgium $47.9B AUM 37.61% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $52.9B AUM 36.03% 1-Year Est. Return
Beau Ventures, LLc
Beau Ventures, LLc Pittsford, New York $1.06B AUM 83.06% 1-Year Est. Return
Adams Diversified Equity Fund
Adams Diversified Equity Fund Baltimore, Maryland $3.3B AUM 38.12% 1-Year Est. Return
Banque Pictet & Cie
Banque Pictet & Cie Geneva 73, Switzerland $14.5B AUM 33.71% 1-Year Est. Return
Gateway Investment Advisers
Gateway Investment Advisers Cincinnati, Ohio $11B AUM 34.31% 1-Year Est. Return
North Growth Management
North Growth Management Vancouver, British Columbia, Canada $743M AUM 74.29% 1-Year Est. Return
Fideuram - Intesa Sanpaolo Private Banking
Fideuram - Intesa Sanpaolo Private Banking Turin $3.5B AUM 45.13% 1-Year Est. Return

First County Bank's BIIB Position: Q3 2026 in Review

First County Bank reduced its Biogen (BIIB) stake by 0.38% in Q3 2026, selling an estimated $3.18K and leaving 3,918 shares worth $885K. The position accounts for 0.41% of the portfolio, ranked #68.

First County Bank first reported a position in BIIB in Q1 2025 and has held it in 7 quarters since. 232 funds tracked by Wall St. Rank hold BIIB as of Q3 2026.

  • First County Bank held 3,918 shares of Biogen worth $885K as of Q3 2026.
  • First County Bank sold 15 Biogen shares in Q3 2026, an estimated $3.18K.
  • Biogen made up 0.41% of First County Bank's portfolio in Q3 2026, its #68 holding.
  • First County Bank first reported a position in Biogen in Q1 2025 and has held it in 7 quarters since.
  • 232 funds tracked by Wall St. Rank held Biogen as of Q3 2026.

Based on First County Bank's 13F filing for Q3 2026, filed 13 Oct 2026.