Parallax Volatility Advisers
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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 		$461K Buy
+10,024
New +$603K ﹤0.01% 1132
2026
Q1 		– Sell
-61,314
Closed -$3.07M – 1512
2025
Q4 		$2.4M Buy
61,314
+21,698
+55% +$678K ﹤0.01% 896
2025
Q3 		$1.16M Buy
+39,616
New +$898K ﹤0.01% 1067
2018
Q1 		– Sell
-7,602
Closed -$149K – 2418
2017
Q4 		$149K Buy
+7,602
New +$116K ﹤0.01% 2507
2017
Q3 		– Sell
-109,159
Closed -$1.7M – 2159
2017
Q2 		$1.7M Buy
109,159
+104,857
+2,437% +$1.46M ﹤0.01% 893
2017
Q1 		$55K Buy
+4,302
New +$57.1K ﹤0.01% 2567
2016
Q4 		– Sell
-18,093
Closed -$155K – 3106
2016
Q3 		$126K Buy
18,093
+11,944
+194% +$81.6K ﹤0.01% 2024
2016
Q2 		$39K Sell
6,149
-6,260
-50% -$44K ﹤0.01% 2235
2016
Q1 		$87K Buy
+12,409
New +$68.7K ﹤0.01% 2001
2015
Q3 		– Sell
-413
Closed -$4K – 2932
2015
Q2 		$4K Buy
413
+136
+49% +$1.73K ﹤0.01% 3334
2015
Q1 		$4K Sell
277
-6,273
-96% -$126K ﹤0.01% 4140
2014
Q4 		$160K Sell
6,550
-64,817
-91% -$1.67M ﹤0.01% 3060
2014
Q3 		$1.85M Buy
71,367
+44,625
+167% +$983K 0.01% 1145
2014
Q2 		$419K Buy
+26,742
New +$379K ﹤0.01% 1493
2014
Q1 		– Sell
-180
Closed -$2K – 3384
2013
Q4 		$2K Sell
180
-1,856
-91% -$16.5K ﹤0.01% 3240
2013
Q3 		$16K Sell
2,036
-3,758
-65% -$33.2K ﹤0.01% 2388
2013
Q2 		$54K Buy
+5,794
New +$49.9K ﹤0.01% 1560

Other funds holding CENX

G
Glencore Baar, Switzerland $4.87B AUM 67.38% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
SG
Sourcerock Group Denver, Colorado $1.92B AUM 45.54% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Geode Capital Management
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.