Czech National Bank’s Biogen BIIB Stock Holding History

Czech National Bank’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	$9.08M	Buy	42,023 +2,054	+5%	+$393K	0.05%	294
2026 Q1	$7.33M	Buy	39,969 +1,286	+3%	+$237K	0.05%	318
2025 Q4	$6.81M	Buy	38,683 +1,445	+4%	+$236K	0.04%	322
2025 Q3	$5.22M	Buy	37,238 +1,422	+4%	+$192K	0.04%	368
2025 Q2	$4.5M	Buy	35,816 +2,196	+7%	+$274K	0.04%	379
2025 Q1	$4.6M	Buy	33,620 +2,025	+6%	+$289K	0.04%	356
2024 Q4	$4.83M	Buy	31,595 +1,923	+6%	+$324K	0.04%	337
2024 Q3	$5.75M	Buy	29,672 +1,928	+7%	+$403K	0.06%	295
2024 Q2	$6.43M	Buy	27,744 +2,250	+9%	+$489K	0.07%	249
2024 Q1	$5.5M	Buy	25,494 +117	+0.5%	+$27.4K	0.07%	266
2023 Q4	$6.57M	Buy	25,377 +65	+0.3%	+$16K	0.09%	216
2023 Q3	$6.51M	Buy	25,312 +8,178	+48%	+$2.19M	0.1%	197
2023 Q2	$4.88M	Buy	17,134 +170	+1%	+$50.6K	0.11%	182
2023 Q1	$4.72M	Buy	16,964 +109	+0.6%	+$30.2K	0.12%	183
2022 Q4	$4.67M	Sell	16,855 -9	-0.1%	-$2.54K	0.12%	180
2022 Q3	$4.5M	Buy	+16,864	New	+$3.58M	0.13%	166

Other funds holding BIIB

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

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

ADEF

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

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

EAM

Erste Asset Management Vienna, Austria $12.9B AUM 52.69% 1-Year Est. Return

BPC

Banque Pictet & Cie Geneva 73, Switzerland $16B AUM 29.1% 1-Year Est. Return

Asset Management One Tokyo, Japan $39B AUM 37.51% 1-Year Est. Return

Czech National Bank's BIIB Position: Q2 2026 in Review

Czech National Bank increased its Biogen (BIIB) stake by 5.1% in Q2 2026, buying an estimated $393K and bringing the position to 42,023 shares worth $9.08M. The position accounts for 0.05% of the portfolio, ranked #294.

Czech National Bank first reported a position in BIIB in Q3 2022 and has held it in 16 quarters since. 331 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Czech National Bank held 42,023 shares of Biogen worth $9.08M as of Q2 2026.
Czech National Bank bought 2,054 Biogen shares in Q2 2026, an estimated $393K.
Biogen made up 0.05% of Czech National Bank's portfolio in Q2 2026, its #294 holding.
Czech National Bank first reported a position in Biogen in Q3 2022 and has held it in 16 quarters since.
331 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Czech National Bank's 13F filing for Q2 2026, filed 8 Jul 2026.