Parallax Volatility Advisers’s Century Aluminum CENX Stock Holding History

Parallax Volatility Advisers’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	$12.4M	Buy	201,900 +142,600	+240%	+$7.15M	0.03%	355
2025 Q4	$2.32M	Hold	59,300	–	–	﹤0.01%	902
2025 Q3	$1.74M	Buy	+59,300	New	+$1.34M	﹤0.01%	965
2017 Q2	–	Sell	-20,000	Closed	-$254K	–	2395
2017 Q1	$254K	Buy	20,000 +16,000	+400%	+$212K	﹤0.01%	1842
2016 Q4	$34K	Buy	+4,000	New	+$34.2K	﹤0.01%	2562
2015 Q3	–	Sell	-2,400	Closed	-$25K	–	2931
2015 Q2	$25K	Sell	2,400 -47,700	-95%	-$608K	﹤0.01%	2824
2015 Q1	$691K	Buy	50,100 +49,900	+24,950%	+$1M	﹤0.01%	1422
2014 Q4	$5K	Sell	200 -39,900	-100%	-$1.03M	﹤0.01%	4827
2014 Q3	$1.04M	Buy	+40,100	New	+$883K	﹤0.01%	1446
2013 Q4	–	Sell	-200	Closed	-$2K	–	3350
2013 Q3	$2K	Sell	200 -1,300	-87%	-$11.5K	﹤0.01%	2919
2013 Q2	$14K	Buy	+1,500	New	+$12.9K	﹤0.01%	2122

Other funds holding CENX

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

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Sourcerock Group Denver, Colorado $2.48B AUM 72.25% 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

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Parallax Volatility Advisers's CENX Position: Q1 2026 in Review

Parallax Volatility Advisers sold out of Century Aluminum (CENX) in Q1 2026, closing a stake of 61,314 shares — an estimated $3.07M sold.

Parallax Volatility Advisers first reported a position in CENX in Q2 2013 and held it in 16 quarters. The position peaked at $2.4M in Q4 2025. 386 funds tracked by Wall St. Rank hold CENX as of Q1 2026.

Parallax Volatility Advisers reported no remaining Century Aluminum position as of Q1 2026 after selling out during the quarter.
Parallax Volatility Advisers sold 61,314 Century Aluminum shares in Q1 2026, an estimated $3.07M.
Parallax Volatility Advisers first reported a position in Century Aluminum in Q2 2013 and held it in 16 quarters.
Parallax Volatility Advisers's Century Aluminum position peaked at $2.4M in Q4 2025.
386 funds tracked by Wall St. Rank held Century Aluminum as of Q1 2026.

Based on Parallax Volatility Advisers's 13F filing for Q1 2026, filed 15 May 2026.