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 Q2	–	Sell	-201,900	Closed	-$12.4M	–	1545
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 $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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

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

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

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

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Parallax Volatility Advisers's CENX Position: Q2 2026 in Review

Parallax Volatility Advisers opened a new position in Century Aluminum (CENX) in Q2 2026: 10,024 shares worth $461K. The stake represents ﹤0.01% of the portfolio and ranks #1132 among its holdings. This is a return to the name: Parallax Volatility Advisers previously reported a position in CENX as recently as Q4 2025.

Parallax Volatility Advisers first reported a position in CENX in Q2 2013 and has held it in 17 quarters since. The position peaked at $2.4M in Q4 2025. 415 funds tracked by Wall St. Rank hold CENX as of Q2 2026.

Parallax Volatility Advisers held 10,024 shares of Century Aluminum worth $461K as of Q2 2026.
Century Aluminum was a new Parallax Volatility Advisers position in Q2 2026.
Century Aluminum made up ﹤0.01% of Parallax Volatility Advisers's portfolio in Q2 2026, its #1132 holding.
Parallax Volatility Advisers first reported a position in Century Aluminum in Q2 2013 and has held it in 17 quarters since.
Parallax Volatility Advisers's Century Aluminum position peaked at $2.4M in Q4 2025.
415 funds tracked by Wall St. Rank held Century Aluminum as of Q2 2026.

Based on Parallax Volatility Advisers's 13F filing for Q2 2026, filed 14 Aug 2026.