D.E. Shaw & Co’s Biogen BIIB Stock Holding History

D.E. Shaw & Co’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	$1.17M	Hold	6,400	–	–	﹤0.01%	3330
2025 Q4	$1.13M	Sell	6,400 -500	-7%	-$81.7K	﹤0.01%	3460
2025 Q3	$967K	Sell	6,900 -1,700	-20%	-$230K	﹤0.01%	3483
2025 Q2	$1.08M	Sell	8,600 -130,400	-94%	-$16.2M	﹤0.01%	3179
2025 Q1	$19M	Buy	139,000 +103,100	+287%	+$14.7M	0.02%	977
2024 Q4	$5.49M	Buy	35,900 +18,500	+106%	+$3.12M	﹤0.01%	1899
2024 Q3	$3.37M	Sell	17,400 -16,600	-49%	-$3.47M	﹤0.01%	2278
2024 Q2	$7.88M	Buy	34,000 +18,600	+121%	+$4.04M	0.01%	1491
2024 Q1	$3.32M	Buy	15,400 +7,900	+105%	+$1.85M	﹤0.01%	2231
2023 Q4	$1.94M	Hold	7,500	–	–	﹤0.01%	2690
2023 Q3	$1.93M	Hold	7,500	–	–	﹤0.01%	2600
2023 Q2	$2.14M	Hold	7,500	–	–	﹤0.01%	2578
2023 Q1	$2.09M	Sell	7,500 -63,500	-89%	-$17.6M	﹤0.01%	2664
2022 Q4	$19.7M	Hold	71,000	–	–	0.02%	939
2022 Q3	$19M	Sell	71,000 -115,000	-62%	-$24.4M	0.02%	880
2022 Q2	$37.9M	Hold	186,000	–	–	0.04%	520
2022 Q1	$39.2M	Buy	186,000 +11,800	+7%	+$2.57M	0.04%	605
2021 Q4	$41.8M	Buy	174,200 +66,800	+62%	+$17.2M	0.03%	644
2021 Q3	$30.4M	Sell	107,400 -18,500	-15%	-$6.06M	0.03%	776
2021 Q2	$43.6M	Buy	125,900 +37,500	+42%	+$11.4M	0.04%	618
2021 Q1	$24.7M	Sell	88,400 -41,800	-32%	-$11.3M	0.02%	820
2020 Q4	$31.9M	Buy	130,200 +48,800	+60%	+$12.6M	0.03%	712
2020 Q3	$23.1M	Sell	81,400 -12,100	-13%	-$3.37M	0.02%	754
2020 Q2	$25M	Buy	93,500 +34,200	+58%	+$10.3M	0.03%	664
2020 Q1	$18.8M	Sell	59,300 -78,400	-57%	-$23.8M	0.03%	653
2019 Q4	$40.9M	Sell	137,700 -10,000	-7%	-$2.77M	0.05%	489
2019 Q3	$34.4M	Buy	147,700 +7,700	+6%	+$1.79M	0.04%	530
2019 Q2	$32.7M	Buy	140,000 +70,000	+100%	+$16.2M	0.04%	518
2019 Q1	$16.5M	Sell	70,000 -104,300	-60%	-$32.8M	0.02%	820
2018 Q4	$52.5M	Buy	174,300 +30,000	+21%	+$9.57M	0.07%	330
2018 Q3	$51M	Buy	144,300 +24,500	+20%	+$8.44M	0.06%	393
2018 Q2	$34.8M	Buy	119,800 +54,500	+83%	+$15.3M	0.05%	481
2018 Q1	$17.9M	Sell	65,300 -15,300	-19%	-$4.75M	0.02%	720
2017 Q4	$25.7M	Sell	80,600 -11,800	-13%	-$3.79M	0.04%	567
2017 Q3	$28.9M	Sell	92,400 -12,700	-12%	-$3.76M	0.04%	479
2017 Q2	$28.5M	Buy	105,100 +49,300	+88%	+$13M	0.05%	463
2017 Q1	$15.3M	Sell	55,800 -167,700	-75%	-$47.4M	0.03%	701
2016 Q4	$63.4M	Buy	223,500 +900	+0.4%	+$267K	0.11%	224
2016 Q3	$69.7M	Sell	222,600 -12,500	-5%	-$3.7M	0.12%	193
2016 Q2	$56.9M	Sell	235,100 -9,700	-4%	-$2.56M	0.1%	229
2016 Q1	$63.7M	Sell	244,800 -114,100	-32%	-$30.1M	0.11%	208
2015 Q4	$110M	Buy	358,900 +132,400	+58%	+$38M	0.16%	143
2015 Q3	$66.1M	Buy	226,500 +36,700	+19%	+$12.1M	0.1%	252
2015 Q2	$76.7M	Buy	189,800 +80,300	+73%	+$32.2M	0.11%	210
2015 Q1	$46.2M	Sell	109,500 -203,000	-65%	-$80M	0.07%	328
2014 Q4	$106M	Sell	312,500 -4,400	-1%	-$1.42M	0.14%	162
2014 Q3	$105M	Buy	316,900 +3,000	+1%	+$989K	0.14%	165
2014 Q2	$99M	Sell	313,900 -71,500	-19%	-$21.5M	0.13%	160
2014 Q1	$118M	Buy	385,400 +42,500	+12%	+$13.5M	0.17%	117
2013 Q4	$95.9M	Buy	342,900 +84,800	+33%	+$21.9M	0.13%	153
2013 Q3	$62.1M	Buy	258,100 +91,500	+55%	+$20.5M	0.1%	206
2013 Q2	$35.9M	Buy	+166,600	New	+$35.6M	0.07%	320