Caption Management’s Biogen BIIB Stock Holding History

Caption 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 Q2	$10.8M	Buy	50,000 +10,000	+25%	+$1.91M	0.05%	378
2026 Q1	$7.33M	Buy	40,000 +20,000	+100%	+$3.69M	0.04%	416
2025 Q4	$3.52M	Hold	20,000	–	–	0.02%	625
2025 Q3	$2.8M	Buy	+20,000	New	+$2.7M	0.02%	711
2025 Q1	–	Sell	-18,000	Closed	-$2.75M	–	1534
2024 Q4	$2.75M	Hold	18,000	–	–	0.03%	583
2024 Q3	$3.49M	Hold	18,000	–	–	0.06%	390
2024 Q2	$4.17M	Buy	+18,000	New	+$3.91M	0.06%	300
2023 Q1	–	Sell	-174,300	Closed	-$48.3M	–	1110
2022 Q4	$48.3M	Sell	174,300 -75,500	-30%	-$21.3M	0.75%	16
2022 Q3	$66.7M	Buy	249,800 +115,500	+86%	+$24.5M	0.92%	11
2022 Q2	$27.4M	Buy	134,300 +10,000	+8%	+$2.04M	0.38%	47
2022 Q1	$26.2M	Sell	124,300 -222,300	-64%	-$48.3M	0.31%	62
2021 Q4	$83.2M	Buy	346,600 +37,400	+12%	+$9.62M	0.93%	4
2021 Q3	$87.5M	Buy	309,200 +137,900	+81%	+$45.2M	1%	5
2021 Q2	$59.3M	Buy	171,300 +121,100	+241%	+$36.7M	0.77%	15
2021 Q1	$14M	Buy	50,200 +6,200	+14%	+$1.67M	0.3%	64
2020 Q4	$10.8M	Sell	44,000 -29,100	-40%	-$7.51M	0.25%	110
2020 Q3	$20.7M	Buy	73,100 +68,800	+1,600%	+$19.2M	0.49%	28
2020 Q2	$1.15M	Buy	+4,300	New	+$1.29M	0.04%	505

Other funds holding BIIB

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Caption Management's BIIB Position: Q2 2026 in Review

Caption Management opened a new position in Biogen (BIIB) in Q2 2026: 21,000 shares worth $4.54M. The stake represents 0.02% of the portfolio and ranks #615 among its holdings. This is a return to the name: Caption Management previously reported a position in BIIB as recently as Q4 2025.

Caption Management first reported a position in BIIB in Q4 2019 and has held it in 16 quarters since. The position peaked at $63.2M in Q3 2021. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Caption Management held 21,000 shares of Biogen worth $4.54M as of Q2 2026.
Biogen was a new Caption Management position in Q2 2026.
Biogen made up 0.02% of Caption Management's portfolio in Q2 2026, its #615 holding.
Caption Management first reported a position in Biogen in Q4 2019 and has held it in 16 quarters since.
Caption Management's Biogen position peaked at $63.2M in Q3 2021.
1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Caption Management's 13F filing for Q2 2026, filed 14 Aug 2026.