Erste Asset Management’s Biogen BIIB Stock Holding History

Erste Asset Management’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 Q2	$14.4M	Buy	66,677 +13,535	+25%	+$2.59M	0.11%	171
2026 Q1	$9.97M	Buy	53,142 +4,408	+9%	+$812K	0.09%	199
2025 Q4	$8.62M	Buy	48,734 +3,149	+7%	+$514K	0.07%	203
2025 Q3	$6.31M	Sell	45,585 -1,038	-2%	-$140K	0.06%	218
2025 Q2	$5.88M	Sell	46,623 -4,333	-9%	-$540K	0.05%	258
2025 Q1	$7.05M	Sell	50,956 -8,360	-14%	-$1.2M	0.09%	193
2024 Q4	$8.98M	Sell	59,316 -228,307	-79%	-$38.5M	0.11%	170
2024 Q3	$55.8M	Buy	287,623 +3,306	+1%	+$692K	0.67%	39
2024 Q2	$65.6M	Buy	284,317 +19,903	+8%	+$4.33M	0.87%	26
2024 Q1	$57.1M	Sell	264,414 -10,498	-4%	-$2.46M	0.78%	33
2023 Q4	$71.3M	Buy	274,912 +283	+0.1%	+$69.5K	1.04%	15
2023 Q3	$70.6M	Buy	274,629 +1,533	+0.6%	+$410K	1.22%	12
2023 Q2	$77.6M	Buy	273,096 +2,561	+0.9%	+$762K	1.37%	9
2023 Q1	$75M	Buy	270,535 +34,088	+14%	+$9.43M	1.44%	6
2022 Q4	$65.4M	Buy	236,447 +20,387	+9%	+$5.76M	1.38%	6
2022 Q3	$57.6M	Sell	216,060 -16,656	-7%	-$3.54M	1.29%	7
2022 Q2	$47.5M	Sell	232,716 -12,401	-5%	-$2.54M	1.06%	13
2022 Q1	$51.7M	Sell	245,117 -3,548	-1%	-$772K	0.99%	16
2021 Q4	$61M	Buy	248,665 +15,015	+6%	+$3.86M	1.1%	10
2021 Q3	$66.3M	Buy	233,650 +11,315	+5%	+$3.71M	1.31%	8
2021 Q2	$77M	Buy	222,335 +25,598	+13%	+$7.75M	1.53%	5
2021 Q1	$54.8M	Sell	196,737 -185	-0.1%	-$49.9K	1.34%	8
2020 Q4	$48M	Buy	196,922 +144,825	+278%	+$37.4M	1.33%	8
2020 Q3	$14.7M	Sell	52,097 -20,637	-28%	-$5.76M	0.5%	66
2020 Q2	$19M	Sell	72,734 -20,333	-22%	-$6.11M	0.76%	37
2020 Q1	$29.3M	Sell	93,067 -90,140	-49%	-$27.4M	1.7%	6
2019 Q4	$54.6M	Buy	183,207 +143,115	+357%	+$39.7M	2.42%	4
2019 Q3	$9.24M	Buy	40,092 +474	+1%	+$110K	0.49%	54
2019 Q2	$9.45M	Sell	39,618 -39,914	-50%	-$9.22M	0.5%	48
2019 Q1	$18.5M	Buy	79,532 +31,445	+65%	+$9.9M	1.04%	23
2018 Q4	$14.2M	Buy	+48,087	New	+$15.3M	0.95%	23

Other funds holding BIIB

Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

AIM

Artemis Investment Management Edinburgh, United Kingdom $11.2B AUM 80.72% 1-Year Est. Return

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

AAMU

AEGON Asset Management (UK) Edinburgh, United Kingdom $9.38B AUM 48.94% 1-Year Est. Return

New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return

ECSS

Eurizon Capital SGR SpA Milan $37.3B AUM

ADEF

Adams Diversified Equity Fund Baltimore, Maryland $3.27B AUM 45.57% 1-Year Est. Return

New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return

Erste Asset Management's BIIB Position: Q2 2026 in Review

Erste Asset Management increased its Biogen (BIIB) stake by 25% in Q2 2026, buying an estimated $2.59M and bringing the position to 66,677 shares worth $14.4M. The position accounts for 0.11% of the portfolio, ranked #171.

Erste Asset Management first reported a position in BIIB in Q4 2018 and has held it in 31 quarters since. The position peaked at $77.6M in Q2 2023. 374 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Erste Asset Management held 66,677 shares of Biogen worth $14.4M as of Q2 2026.
Erste Asset Management bought 13,535 Biogen shares in Q2 2026, an estimated $2.59M.
Biogen made up 0.11% of Erste Asset Management's portfolio in Q2 2026, its #171 holding.
Erste Asset Management first reported a position in Biogen in Q4 2018 and has held it in 31 quarters since.
Erste Asset Management's Biogen position peaked at $77.6M in Q2 2023.
374 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Erste Asset Management's 13F filing for Q2 2026, filed 28 Jul 2026.