Louisiana State Employees Retirement System Biogen Inc. Transaction History

Louisiana State Employees Retirement System

$5.54 Billion
Q4 2025

A detailed history of Louisiana State Employees Retirement System transactions in Biogen Inc. stock. As of the latest transaction made, Louisiana State Employees Retirement System holds 7,500 shares of BIIB stock, worth $1.26 Million. This represents 0.02% of its overall portfolio holdings.

Number of Shares

7,500

Previous 18,400 59.24%

Holding current value

$1.26 Million

Previous $2.58 Million 51.26%

% of portfolio

0.02%

Previous 0.04%

29 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q4 2025 Jan 16, 2026	SELL	$142.26 - $167.55 $1.55 Million - $1.83 Million	-10,900 Reduced 59.24%	7,500 $1.26 Million
Q2 2025 Jul 23, 2025	SELL	$113.38 - $135.49 $22,676 - $27,098	-200 Reduced 1.08%	18,400 $2.31 Million
Q1 2025 May 01, 2025	BUY	$133.43 - $153.27 $26,686 - $30,654	200 Added 1.09%	18,600 $2.55 Million
Q4 2024 Jan 29, 2025	SELL	$146.47 - $191.55 $131,823 - $172,395	-900 Reduced 4.66%	18,400 $2.81 Million
Q3 2024 Oct 23, 2024	SELL	$189.07 - $236.8 $94,535 - $118,400	-500 Reduced 2.53%	19,300 $3.74 Million

Q1 2024 Apr 23, 2024	SELL	$212.02 - $267.71 $106,010 - $133,855	-500 Reduced 2.46%	19,800 $4.27 Million
Q4 2023 Jan 29, 2024	SELL	$222.59 - $267.94 $44,518 - $53,588	-200 Reduced 0.98%	20,300 $5.25 Million
Q3 2023 Oct 17, 2023	BUY	$253.3 - $285.89 $633,250 - $714,725	2,500 Added 13.89%	20,500 $5.27 Million
Q2 2023 Jul 18, 2023	BUY	$275.25 - $318.06 $385,350 - $445,284	1,400 Added 8.43%	18,000 $5.13 Million
Q1 2023 Apr 19, 2023	BUY	$256.56 - $292.34 $25,656 - $29,233	100 Added 0.61%	16,600 $4.62 Million
Q4 2022 Jan 24, 2023	SELL	$252.44 - $306.72 $151,464 - $184,032	-600 Reduced 3.51%	16,500 $4.57 Million
Q1 2022 Apr 22, 2022	BUY	$193.77 - $244.14 $19,377 - $24,414	100 Added 0.59%	17,100 $3.77 Million
Q3 2021 Oct 12, 2021	SELL	$282.99 - $369.05 $56,598 - $73,810	-200 Reduced 1.16%	17,000 $4.81 Million
Q2 2021 Jul 16, 2021	SELL	$259.0 - $414.71 $25,900 - $41,471	-100 Reduced 0.58%	17,200 $5.96 Million
Q1 2021 Apr 14, 2021	BUY	$242.95 - $284.63 $242,950 - $284,630	1,000 Added 6.13%	17,300 $4.84 Million
Q4 2020 Jan 11, 2021	BUY	$236.26 - $355.63 $1.96 Million - $2.95 Million	8,300 Added 103.75%	16,300 $3.99 Million
Q3 2020 Oct 19, 2020	BUY	$264.77 - $305.71 $264,770 - $305,710	1,000 Added 14.29%	8,000 $2.27 Million
Q2 2020 Jul 13, 2020	SELL	$258.66 - $342.55 $181,062 - $239,785	-700 Reduced 9.09%	7,000 $1.87 Million
Q1 2020 Apr 13, 2020	SELL	$268.85 - $341.04 $241,965 - $306,936	-900 Reduced 10.47%	7,700 $2.44 Million
Q4 2019 Jan 17, 2020	SELL	$220.06 - $304.07 $66,018 - $91,221	-300 Reduced 3.37%	8,600 $2.55 Million
Q3 2019 Oct 24, 2019	SELL	$217.44 - $243.88 $173,952 - $195,104	-800 Reduced 8.25%	8,900 $2.07 Million
Q2 2019 Jul 15, 2019	SELL	$219.29 - $241.72 $153,503 - $169,204	-700 Reduced 6.73%	9,700 $2.25 Million
Q1 2019 Apr 15, 2019	SELL	$216.71 - $338.96 $43,342 - $67,792	-200 Reduced 1.89%	10,400 $2.46 Million
Q4 2018 Jan 14, 2019	SELL	$278.5 - $352.75 $334,200 - $423,300	-1,200 Reduced 10.17%	10,600 $3.19 Million
Q3 2018 Oct 16, 2018	SELL	$293.51 - $383.83 $176,106 - $230,298	-600 Reduced 4.84%	11,800 $4.17 Million
Q2 2018 Jul 18, 2018	SELL	$257.52 - $306.91 $128,759 - $153,455	-500 Reduced 3.88%	12,400 $3.6 Million
Q1 2018 Apr 18, 2018	BUY	$260.13 - $367.91 $26,013 - $36,791	100 Added 0.78%	12,900 $3.53 Million
Q4 2017 Jan 16, 2018	SELL	$307.64 - $344.58 $123,056 - $137,832	-400 Reduced 3.03%	12,800 $4.08 Million
Q3 2017 Oct 16, 2017	BUY	$281.15 - $329.69 $3.71 Million - $4.35 Million	13,200	13,200 $4.13 Million

Others Institutions Holding BIIB

# of Institutions

1,083

Shares Held

131M

Call Options Held

3.77M

Put Options Held

2.31M

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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Louisiana State Employees Retirement System Biogen Inc. Transaction History