Vanguard Group Inc Biogen Inc. Transaction History

Vanguard Group Inc

$6.57 Trillion
Q4 2025

A detailed history of Vanguard Group Inc transactions in Biogen Inc. stock. As of the latest transaction made, Vanguard Group Inc holds 17,447,092 shares of BIIB stock, worth $2.92 Billion. This represents 0.04% of its overall portfolio holdings.

Number of Shares

17,447,092

Previous 17,289,235 0.91%

Holding current value

$2.92 Billion

Previous $2.42 Billion 20.7%

% of portfolio

0.04%

Previous 0.04%

20 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q4 2025 Jan 29, 2026	BUY	$142.26 - $167.55 $22.5 Million - $26.4 Million	157,857 Added 0.91%	17,447,092 $2.92 Billion
Q3 2025 Nov 07, 2025	SELL	$122.68 - $148.84 $173,714 - $210,757	-1,416 Reduced 0.01%	17,289,235 $2.42 Billion
Q2 2025 Aug 11, 2025	BUY	$113.38 - $135.49 $29.2 Million - $34.9 Million	257,812 Added 1.51%	17,290,651 $2.17 Billion
Q1 2025 May 09, 2025	BUY	$133.43 - $153.27 $37.9 Million - $43.5 Million	283,964 Added 1.7%	17,032,839 $2.33 Billion
Q4 2024 Feb 11, 2025	BUY	$146.47 - $191.55 $10.3 Million - $13.5 Million	70,368 Added 0.42%	16,748,875 $2.56 Billion

Q3 2024 Nov 13, 2024	BUY	$189.07 - $236.8 $14.8 Million - $18.6 Million	78,344 Added 0.47%	16,678,507 $3.23 Billion
Q2 2024 Aug 13, 2024	BUY	$190.52 - $236.72 $5.67 Million - $7.05 Million	29,765 Added 0.18%	16,600,163 $3.85 Billion
Q1 2024 May 10, 2024	BUY	$212.02 - $267.71 $459 Million - $579 Million	2,163,068 Added 15.01%	16,570,398 $3.57 Billion
Q4 2023 Feb 14, 2024	BUY	$222.59 - $267.94 $494 Million - $594 Million	2,218,744 Added 18.2%	14,407,330 $3.73 Billion
Q3 2023 Nov 14, 2023	SELL	$253.3 - $285.89 $1.99 Million - $2.24 Million	-7,850 Reduced 0.06%	12,188,586 $3.13 Billion
Q2 2023 Aug 14, 2023	BUY	$275.25 - $318.06 $10.7 Million - $12.3 Million	38,774 Added 0.32%	12,196,436 $3.47 Billion
Q1 2023 Jul 14, 2023	BUY	$256.56 - $292.34 $107,242 - $122,198	418 Added 0.0%	12,157,662 $3.38 Billion
Q1 2023 May 15, 2023	BUY	$256.56 - $292.34 $46.3 Million - $52.8 Million	180,621 Added 1.51%	12,157,244 $3.38 Billion
Q4 2022 Feb 10, 2023	BUY	$252.44 - $306.72 $15.6 Million - $18.9 Million	61,650 Added 0.52%	11,976,623 $3.32 Billion
Q3 2022 Nov 14, 2022	BUY	$194.69 - $268.46 $10.7 Million - $14.8 Million	54,951 Added 0.46%	11,914,973 $3.18 Billion
Q2 2022 Aug 12, 2022	BUY	$187.54 - $223.02 $26.2 Million - $31.1 Million	139,438 Added 1.19%	11,860,022 $2.42 Billion
Q1 2022 May 13, 2022	BUY	$193.77 - $244.14 $35.5 Million - $44.7 Million	183,285 Added 1.59%	11,720,584 $2.47 Billion
Q4 2021 Feb 14, 2022	SELL	$223.92 - $287.77 $34.6 Million - $44.5 Million	-154,577 Reduced 1.32%	11,537,299 $2.77 Billion
Q3 2021 Nov 12, 2021	SELL	$282.99 - $369.05 $17.4 Million - $22.7 Million	-61,457 Reduced 0.52%	11,691,876 $3.31 Billion
Q2 2021 Aug 13, 2021	BUY	$259.0 - $414.71 $3.04 Billion - $4.87 Billion	11,753,333 New	11,753,333 $4.07 Billion

Others Institutions Holding BIIB

# of Institutions

1,088

Shares Held

131M

Call Options Held

3.77M

Put Options Held

2.32M

View Full List

About BIOGEN INC.

Ticker BIIB
Exchange NASDAQ
Sector Healthcare
Industry Drug Manufacturers—General
Shares Outstandng 144,000,992
Market Cap $24.1B
Description
Biogen Inc. discovers, develops, manufactures, and delivers therapies for treating neurological and neurodegenerative diseases. The company offers TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI, and FAMPYRA for multiple sclerosis (MS); SPINRAZA for spinal muscular atrophy; and FUMADERM to treat plaque psoriasis. It also provides BENEPALI, an eta...

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Vanguard Group Inc Biogen Inc. Transaction History