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Cornerstone Planning Group’s Biogen BIIB Stock Holding History

Cornerstone Planning 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 		$18.4K Sell
93
-2
-2% -$383 ﹤0.01% 698
2026
Q1 		$18K Buy
95
+54
+132% +$9.95K ﹤0.01% 706
2025
Q4 		$7.17K Buy
41
+39
+1,950% +$6.37K ﹤0.01% 877
2025
Q3 		$104 Sell
2
-50
-96% -$6.76K ﹤0.01% 1645
2025
Q2 		$6.91K Buy
52
+38
+271% +$4.74K ﹤0.01% 647
2025
Q1 		$1.65K Sell
14
-9
-39% -$1.29K ﹤0.01% 1031
2024
Q4 		$3.42K Buy
23
+14
+156% +$2.36K ﹤0.01% 661
2024
Q3 		$1.65K Sell
9
-19
-68% -$3.98K ﹤0.01% 820
2024
Q2 		$5.55K Buy
28
+12
+75% +$2.61K ﹤0.01% 551
2024
Q1 		$3.48K Sell
16
-58
-78% -$13.6K ﹤0.01% 577
2023
Q4 		$19.1K Buy
74
+19
+35% +$4.67K 0.01% 322
2023
Q3 		$14.1K Sell
55
-2
-4% -$535 0.01% 357
2023
Q2 		$16.2K Buy
+57
New +$17K 0.01% 483
2022
Q4 		$5.32K Buy
+19
New +$5.37K ﹤0.01% 865

Other funds holding BIIB

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $344B AUM 42.99% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
Citigroup
Citigroup New York $303B AUM 53.02% 1-Year Est. Return
AIM
Artemis Investment Management Edinburgh, United Kingdom $11.2B AUM 80.72% 1-Year Est. Return

Cornerstone Planning Group's BIIB Position: Q2 2026 in Review

Cornerstone Planning Group reduced its Biogen (BIIB) stake by 2.1% in Q2 2026, selling an estimated $383 and leaving 93 shares worth $18.4K. The position accounts for ﹤0.01% of the portfolio, ranked #698.

Cornerstone Planning Group first reported a position in BIIB in Q4 2022 and has held it in 14 quarters since. The position peaked at $19.1K in Q4 2023. 643 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Cornerstone Planning Group held 93 shares of Biogen worth $18.4K as of Q2 2026.
  • Cornerstone Planning Group sold 2 Biogen shares in Q2 2026, an estimated $383.
  • Biogen made up ﹤0.01% of Cornerstone Planning Group's portfolio in Q2 2026, its #698 holding.
  • Cornerstone Planning Group first reported a position in Biogen in Q4 2022 and has held it in 14 quarters since.
  • Cornerstone Planning Group's Biogen position peaked at $19.1K in Q4 2023.
  • 643 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Cornerstone Planning Group's 13F filing for Q2 2026, filed 29 Jul 2026.