AustralianSuper’s Biogen BIIB Stock Holding History

AustralianSuper’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	$113M	Buy	616,193 +139,381	+29%	+$25.7M	0.59%	44
2025 Q4	$83.9M	Sell	476,812 -274,574	-37%	-$44.9M	0.39%	56
2025 Q3	$105M	Buy	751,386 +11,970	+2%	+$1.62M	0.5%	44
2025 Q2	$92.9M	Buy	739,416 +341,719	+86%	+$42.6M	0.47%	55
2025 Q1	$54.4M	Buy	+397,697	New	+$56.9M	0.31%	87
2023 Q3	–	Sell	-1,819	Closed	-$518K	–	238
2023 Q2	$518K	Buy	+1,819	New	+$541K	﹤0.01%	247
2022 Q1	–	Sell	-191,861	Closed	-$46.4K	–	189
2021 Q4	$46.4K	Sell	191,861 -63,136	-25%	-$16.2M	0.24%	69
2021 Q3	$72.2M	Sell	254,997 -17,516	-6%	-$5.74M	0.46%	46
2021 Q2	$94.4M	Sell	272,513 -235,266	-46%	-$71.3M	0.66%	39
2021 Q1	$142M	Buy	507,779 +368,303	+264%	+$99.3M	1.11%	33
2020 Q4	$34.2M	Buy	+139,476	New	+$36M	0.26%	62

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

AustralianSuper's BIIB Position: Q1 2026 in Review

AustralianSuper increased its Biogen (BIIB) stake by 29% in Q1 2026, buying an estimated $25.7M and bringing the position to 616,193 shares worth $113M. The position accounts for 0.59% of the portfolio, ranked #44.

AustralianSuper first reported a position in BIIB in Q4 2020 and has held it in 11 quarters since. The position peaked at $142M in Q1 2021. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

AustralianSuper held 616,193 shares of Biogen worth $113M as of Q1 2026.
AustralianSuper bought 139,381 Biogen shares in Q1 2026, an estimated $25.7M.
Biogen made up 0.59% of AustralianSuper's portfolio in Q1 2026, its #44 holding.
AustralianSuper first reported a position in Biogen in Q4 2020 and has held it in 11 quarters since.
AustralianSuper's Biogen position peaked at $142M in Q1 2021.
1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on AustralianSuper's 13F filing for Q1 2026, filed 7 May 2026.