Adage Capital Partners’s Century Aluminum CENX Stock Holding History

Adage Capital Partners’s Portfolio CENX Stock Details CENX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-120,000	Closed	-$4.7M	–	981
2025 Q4	$4.7M	Sell	120,000 -175,000	-59%	-$5.47M	0.01%	770
2025 Q3	$8.66M	Buy	295,000 +5,000	+2%	+$113K	0.01%	659
2025 Q2	$5.23M	Buy	290,000 +35,000	+14%	+$594K	0.01%	700
2025 Q1	$4.73M	Buy	+255,000	New	+$4.9M	0.01%	708
2024 Q4	–	Sell	-10,000	Closed	-$162K	–	890
2024 Q3	$162K	Buy	+10,000	New	+$151K	﹤0.01%	832
2019 Q4	–	Sell	-300,000	Closed	-$1.99M	–	719
2019 Q3	$1.99M	Hold	300,000	–	–	﹤0.01%	662
2019 Q2	$2.07M	Buy	+300,000	New	+$2.23M	0.01%	660
2018 Q4	–	Sell	-600,000	Closed	-$7.18M	–	715
2018 Q3	$7.18M	Sell	600,000 -400,000	-40%	-$5.14M	0.02%	591
2018 Q2	$15.8M	Buy	1,000,000 +100,000	+11%	+$1.69M	0.04%	466
2018 Q1	$14.9M	Buy	+900,000	New	+$18.8M	0.03%	465
2013 Q3	–	Sell	-300,000	Closed	-$2.78M	–	689
2013 Q2	$2.78M	Buy	+300,000	New	+$2.58M	0.01%	629

Other funds holding CENX

Glencore Baar, Switzerland $4.87B AUM 67.38% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Sourcerock Group Denver, Colorado $1.92B AUM 45.54% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Adage Capital Partners's CENX Position: Q1 2026 in Review

Adage Capital Partners sold out of Century Aluminum (CENX) in Q1 2026, closing a stake of 120,000 shares — an estimated $4.7M sold.

Adage Capital Partners first reported a position in CENX in Q2 2013 and held it in 11 quarters. The position peaked at $15.8M in Q2 2018. 387 funds tracked by Wall St. Rank hold CENX as of Q1 2026.

Adage Capital Partners reported no remaining Century Aluminum position as of Q1 2026 after selling out during the quarter.
Adage Capital Partners sold 120,000 Century Aluminum shares in Q1 2026, an estimated $4.7M.
Adage Capital Partners first reported a position in Century Aluminum in Q2 2013 and held it in 11 quarters.
Adage Capital Partners's Century Aluminum position peaked at $15.8M in Q2 2018.
387 funds tracked by Wall St. Rank held Century Aluminum as of Q1 2026.

Based on Adage Capital Partners's 13F filing for Q1 2026, filed 15 May 2026.