Vanguard Personalized Indexing Management’s Biogen BIIB Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$6.68M	Sell	36,413 -2,180	-6%	-$402K	0.07%	256
2025 Q4	$6.79M	Sell	38,593 -81	-0.2%	-$13.2K	0.07%	243
2025 Q3	$5.42M	Buy	38,674 +3,746	+11%	+$506K	0.06%	291
2025 Q2	$4.39M	Buy	34,928 +13,226	+61%	+$1.65M	0.05%	330
2025 Q1	$2.97M	Buy	21,702 +44	+0.2%	+$6.29K	0.04%	365
2024 Q4	$3.31M	Buy	21,658 +10,359	+92%	+$1.75M	0.05%	325
2024 Q3	$2.19M	Sell	11,299 -1,962	-15%	-$410K	0.04%	445
2024 Q2	$3.07M	Buy	13,261 +2,855	+27%	+$620K	0.06%	291
2024 Q1	$2.24M	Buy	10,406 +200	+2%	+$46.8K	0.05%	362
2023 Q4	$2.64M	Sell	10,206 -525	-5%	-$129K	0.07%	271
2023 Q3	$2.76M	Sell	10,731 -619	-5%	-$166K	0.08%	236
2023 Q2	$3.23M	Buy	11,350 +1,236	+12%	+$368K	0.1%	196
2023 Q1	$2.81M	Buy	10,114 +909	+10%	+$252K	0.1%	206
2022 Q4	$2.55M	Buy	9,205 +1,938	+27%	+$547K	0.11%	193
2022 Q3	$1.94M	Buy	7,267 +1,389	+24%	+$295K	0.09%	237
2022 Q2	$1.2M	Buy	5,878 +2,704	+85%	+$553K	0.06%	377
2022 Q1	$668K	Buy	3,174 +1,022	+47%	+$222K	0.03%	672
2021 Q4	$516K	Sell	2,152 -821	-28%	-$211K	0.03%	693
2021 Q3	$841K	Buy	2,973 +339	+13%	+$111K	0.08%	280
2021 Q2	$912K	Buy	2,634 +1,212	+85%	+$367K	0.1%	231
2021 Q1	$398K	Buy	1,422 +239	+20%	+$64.5K	0.06%	397
2020 Q4	$290K	Buy	1,183 +141	+14%	+$36.4K	0.06%	385
2020 Q3	$296K	Buy	1,042 +188	+22%	+$52.4K	0.08%	292
2020 Q2	$228K	Sell	854 -345	-29%	-$104K	0.1%	263
2020 Q1	$379K	Buy	+1,199	New	+$364K	0.22%	129