Mercer Global Advisors
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Mercer Global Advisors’s Biogen BIIB Stock Holding History

Mercer Global 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
Q1 		$7.08M Sell
38,600
-3,875
-9% -$714K 0.01% 625
2025
Q4 		$7.45M Buy
42,475
+1,940
+5% +$317K 0.01% 580
2025
Q3 		$5.68M Buy
40,535
+2,920
+8% +$395K 0.01% 620
2025
Q2 		$4.73M Buy
37,615
+28,690
+321% +$3.57M 0.01% 583
2025
Q1 		$1.22M Buy
8,925
+2,450
+38% +$350K ﹤0.01% 1039
2024
Q4 		$990K Buy
6,475
+779
+14% +$131K ﹤0.01% 1124
2024
Q3 		$1.09M Sell
5,696
-630
-10% -$132K ﹤0.01% 991
2024
Q2 		$1.43M Sell
6,326
-1,825
-22% -$397K ﹤0.01% 819
2024
Q1 		$1.76M Buy
8,151
+449
+6% +$105K 0.01% 758
2023
Q4 		$1.99M Sell
7,702
-2,735
-26% -$672K 0.01% 744
2023
Q3 		$2.68M Sell
10,437
-8,835
-46% -$2.36M 0.01% 609
2023
Q2 		$5.49M Sell
19,272
-12,048
-38% -$3.59M 0.02% 431
2023
Q1 		$8.71M Buy
31,320
+16,763
+115% +$4.64M 0.04% 297
2022
Q4 		$4.03M Buy
14,557
+11,310
+348% +$3.19M 0.02% 485
2022
Q3 		$867K Sell
3,247
-139
-4% -$29.5K 0.01% 900
2022
Q2 		$691K Sell
3,386
-248
-7% -$50.7K ﹤0.01% 996
2022
Q1 		$765K Sell
3,634
-648
-15% -$141K ﹤0.01% 1013
2021
Q4 		$1.03M Buy
4,282
+410
+11% +$105K 0.01% 874
2021
Q3 		$1.1M Buy
3,872
+401
+12% +$131K 0.01% 820
2021
Q2 		$1.2M Buy
3,471
+120
+4% +$36.4K 0.01% 755
2021
Q1 		$937K Sell
3,351
-1,340
-29% -$361K 0.01% 810
2020
Q4 		$1.15M Sell
4,691
-16,723
-78% -$4.31M 0.01% 565
2020
Q3 		$6.08M Buy
21,414
+668
+3% +$186K 0.09% 170
2020
Q2 		$5.55M Buy
20,746
+4,451
+27% +$1.34M 0.1% 152
2020
Q1 		$5.16M Buy
16,295
+13,242
+434% +$4.02M 0.11% 157
2019
Q4 		$906K Sell
3,053
-430
-12% -$119K 0.02% 550
2019
Q3 		$810K Buy
3,483
+98
+3% +$22.8K 0.02% 543
2019
Q2 		$792K Sell
3,385
-192
-5% -$44.3K 0.02% 522
2019
Q1 		$846K Buy
+3,577
New +$1.13M 0.03% 465

Other funds holding BIIB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Mercer Global Advisors's BIIB Position: Q1 2026 in Review

Mercer Global Advisors reduced its Biogen (BIIB) stake by 9.1% in Q1 2026, selling an estimated $714K and leaving 38,600 shares worth $7.08M. The position accounts for 0.01% of the portfolio, ranked #625.

Mercer Global Advisors first reported a position in BIIB in Q1 2019 and has held it in 29 quarters since. The position peaked at $8.71M in Q1 2023. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Mercer Global Advisors held 38,600 shares of Biogen worth $7.08M as of Q1 2026.
  • Mercer Global Advisors sold 3,875 Biogen shares in Q1 2026, an estimated $714K.
  • Biogen made up 0.01% of Mercer Global Advisors's portfolio in Q1 2026, its #625 holding.
  • Mercer Global Advisors first reported a position in Biogen in Q1 2019 and has held it in 29 quarters since.
  • Mercer Global Advisors's Biogen position peaked at $8.71M in Q1 2023.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Mercer Global Advisors's 13F filing for Q1 2026, filed 15 May 2026.