SG Americas Securities’s Biogen BIIB Stock Holding History

SG Americas Securities’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
2025 Q2	–	Sell	-18,300	Closed	-$12K	–	2960
2025 Q1	$12K	Sell	18,300 -12,200	-40%	-$1.74M	﹤0.01%	3404
2024 Q4	$36K	Hold	30,500	–	–	﹤0.01%	2959
2024 Q3	$157K	Hold	30,500	–	–	﹤0.01%	2680
2024 Q2	$605K	Buy	30,500 +10,000	+49%	+$2.17M	﹤0.01%	1569
2024 Q1	$125K	Buy	20,500 +9,500	+86%	+$2.22M	﹤0.01%	2364
2023 Q4	$5K	Hold	11,000	–	–	﹤0.01%	3040
2023 Q3	$33K	Sell	11,000 -58,700	-84%	-$15.7M	﹤0.01%	3001
2023 Q2	$216K	Buy	+69,700	New	+$20.7M	﹤0.01%	1764
2023 Q1	–	Sell	-23,200	Closed	-$621K	–	3264
2022 Q4	$621K	Sell	23,200 -65,000	-74%	-$18.4M	0.01%	1353
2022 Q3	$1.82M	Buy	88,200 +65,000	+280%	+$13.8M	0.02%	637
2022 Q2	$323K	Buy	+23,200	New	+$4.74M	﹤0.01%	2337
2021 Q3	–	Sell	-51,800	Closed	-$2.11M	–	3825
2021 Q2	$2.11M	Buy	+51,800	New	+$15.7M	0.01%	1089
2021 Q1	–	Sell	-10,000	Closed	-$11K	–	3286
2020 Q4	$11K	Hold	10,000	–	–	﹤0.01%	3227
2020 Q3	$46K	Hold	10,000	–	–	﹤0.01%	2527
2020 Q2	$16K	Hold	10,000	–	–	﹤0.01%	3615
2020 Q1	$250K	Sell	10,000 -69,100	-87%	-$21M	﹤0.01%	2353
2019 Q4	$850K	Buy	79,100 +40,000	+102%	+$11.1M	0.01%	1384
2019 Q3	$88K	Sell	39,100 -16,500	-30%	-$3.84M	﹤0.01%	2744
2019 Q2	$190K	Sell	55,600 -26,400	-32%	-$6.1M	﹤0.01%	2440
2019 Q1	$252K	Buy	82,000 +16,300	+25%	+$5.13M	﹤0.01%	2399
2018 Q4	$581K	Buy	65,700 +25,000	+61%	+$7.98M	0.01%	1751
2018 Q3	$1.5M	Hold	40,700	–	–	0.01%	1388
2018 Q2	$658K	Sell	40,700 -10,100	-20%	-$2.84M	0.01%	1796
2018 Q1	$287K	Sell	50,800 -60,000	-54%	-$18.6M	﹤0.01%	2206
2017 Q4	$2.63M	Buy	110,800 +3,400	+3%	+$1.09M	0.02%	707
2017 Q3	$2.89M	Buy	107,400 +5,400	+5%	+$1.6M	0.03%	574
2017 Q2	$1.25M	Buy	102,000 +60,900	+148%	+$16.1M	0.01%	1238
2017 Q1	$696K	Sell	41,100 -378,800	-90%	-$107M	0.01%	1624
2016 Q4	$1.83M	Buy	419,900 +330,000	+367%	+$97.8M	0.02%	945
2016 Q3	$1.49M	Buy	89,900 +26,000	+41%	+$7.7M	0.02%	906
2016 Q2	$266K	Buy	63,900 +16,200	+34%	+$4.27M	﹤0.01%	1992
2016 Q1	$368K	Sell	47,700 -17,500	-27%	-$4.62M	﹤0.01%	1898
2015 Q4	$845K	Buy	+65,200	New	+$18.7M	0.01%	1265
2015 Q3	–	Sell	-25,800	Closed	-$726K	–	2115
2015 Q2	$726K	Buy	25,800 +14,500	+128%	+$5.82M	﹤0.01%	1239
2015 Q1	$627K	Buy	11,300 +4,600	+69%	+$1.81M	﹤0.01%	1348
2014 Q4	$235K	Buy	+6,700	New	+$2.17M	﹤0.01%	2285
2013 Q4	–	Sell	-5,000	Closed	-$319K	–	2670
2013 Q3	$319K	Hold	5,000	–	–	﹤0.01%	1888
2013 Q2	$222K	Buy	+5,000	New	+$1.07M	﹤0.01%	1680

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

SG Americas Securities's BIIB Position: Q1 2026 in Review

SG Americas Securities increased its Biogen (BIIB) stake by 6.4% in Q1 2026, buying an estimated $2.18M and bringing the position to 195,668 shares worth $35.9M. The position accounts for 0.04% of the portfolio, ranked #364.

SG Americas Securities first reported a position in BIIB in Q2 2013 and has held it in 51 quarters since. The position peaked at $98.5M in Q1 2025. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

SG Americas Securities held 195,668 shares of Biogen worth $35.9M as of Q1 2026.
SG Americas Securities bought 11,839 Biogen shares in Q1 2026, an estimated $2.18M.
Biogen made up 0.04% of SG Americas Securities's portfolio in Q1 2026, its #364 holding.
SG Americas Securities first reported a position in Biogen in Q2 2013 and has held it in 51 quarters since.
SG Americas Securities's Biogen position peaked at $98.5M in Q1 2025.
1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on SG Americas Securities's 13F filing for Q1 2026, filed 16 Apr 2026.