GW&K Investment Management’s Biogen BIIB Stock Holding History

GW&K Investment Management’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	$44K	Hold	239	–	–	﹤0.01%	583
2025 Q4	$42K	Hold	239	–	–	﹤0.01%	584
2025 Q3	$33K	Sell	239 -21	-8%	-$2.84K	﹤0.01%	617
2025 Q2	$33K	Buy	260 +168	+183%	+$20.9K	﹤0.01%	582
2025 Q1	$13K	Sell	92 -20	-18%	-$2.86K	﹤0.01%	737
2024 Q4	$17K	Buy	112 +59	+111%	+$9.95K	﹤0.01%	656
2024 Q3	$10K	Buy	53 +3	+6%	+$628	﹤0.01%	772
2024 Q2	$12K	Sell	50 -4	-7%	-$869	﹤0.01%	670
2024 Q1	$12K	Buy	54 +4	+8%	+$937	﹤0.01%	640
2023 Q4	$13K	Buy	50 +1	+2%	+$246	﹤0.01%	595
2023 Q3	$13K	Sell	49 -5	-9%	-$1.34K	﹤0.01%	548
2023 Q2	$15K	Buy	+54	New	+$16.1K	﹤0.01%	510
2022 Q3	–	Sell	-18	Closed	-$4K	–	448
2022 Q2	$4K	Sell	18 -12	-40%	-$2.45K	﹤0.01%	626
2022 Q1	$6K	Buy	+30	New	+$6.52K	﹤0.01%	496

Other funds holding BIIB

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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 Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

GW&K Investment Management's BIIB Position: Q1 2026 in Review

GW&K Investment Management held its Biogen (BIIB) position steady in Q1 2026 at 239 shares worth $44K. The position accounts for ﹤0.01% of the portfolio, ranked #583.

GW&K Investment Management first reported a position in BIIB in Q1 2022 and has held it in 14 quarters since. 1,003 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

GW&K Investment Management held 239 shares of Biogen worth $44K as of Q1 2026.
GW&K Investment Management left its Biogen share count unchanged in Q1 2026.
Biogen made up ﹤0.01% of GW&K Investment Management's portfolio in Q1 2026, its #583 holding.
GW&K Investment Management first reported a position in Biogen in Q1 2022 and has held it in 14 quarters since.
1,003 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on GW&K Investment Management's 13F filing for Q1 2026, filed 13 May 2026.