Jim Simons’s Century Aluminum CENX Stock Holding History

Jim Simons’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	$8.19M	Buy	139,499 +21,500	+18%	+$1.08M	0.01%	1081
2025 Q4	$4.62M	Sell	117,999 -247,100	-68%	-$7.72M	0.01%	1353
2025 Q3	$10.7M	Buy	365,099 +209,500	+135%	+$4.75M	0.01%	1066
2025 Q2	$2.8M	Buy	+155,599	New	+$2.64M	﹤0.01%	1897
2025 Q1	–	Sell	-229,699	Closed	-$4.19M	–	3503
2024 Q4	$4.19M	Sell	229,699 -55,000	-19%	-$1.08M	0.01%	1559
2024 Q3	$4.62M	Buy	284,699 +25,400	+10%	+$385K	0.01%	1493
2024 Q2	$4.34M	Sell	259,299 -59,800	-19%	-$1.02M	0.01%	1400
2024 Q1	$4.91M	Sell	319,099 -132,800	-29%	-$1.49M	0.01%	1418
2023 Q4	$5.49M	Sell	451,899 -162,600	-26%	-$1.28M	0.01%	1293
2023 Q3	$4.42M	Sell	614,499 -145,100	-19%	-$1.17M	0.01%	1384
2023 Q2	$6.62M	Buy	759,599 +58,400	+8%	+$507K	0.01%	1254
2023 Q1	$7.01M	Sell	701,199 -336,300	-32%	-$3.48M	0.01%	1288
2022 Q4	$8.49M	Buy	1,037,499 +366,400	+55%	+$2.77M	0.01%	1186
2022 Q3	$3.54M	Buy	671,099 +88,000	+15%	+$669K	0.01%	1651
2022 Q2	$4.3M	Sell	583,099 -86,100	-13%	-$1.34M	0.01%	1675
2022 Q1	$17.6M	Buy	+669,199	New	+$14.1M	0.02%	816
2021 Q2	–	Sell	-20,878	Closed	-$369K	–	3484
2021 Q1	$369K	Sell	20,878 -285,754	-93%	-$4.07M	﹤0.01%	3003
2020 Q4	$3.38M	Sell	306,632 -193,422	-39%	-$1.75M	﹤0.01%	1826
2020 Q3	$3.56M	Buy	500,054 +226,499	+83%	+$1.97M	﹤0.01%	1771
2020 Q2	$1.95M	Buy	+273,555	New	+$1.45M	﹤0.01%	2198
2020 Q1	–	Sell	-304,999	Closed	-$2.29M	–	3463
2019 Q4	$2.29M	Buy	+304,999	New	+$2.11M	﹤0.01%	2258
2019 Q3	–	Sell	-62,000	Closed	-$428K	–	3443
2019 Q2	$428K	Sell	62,000 -89,499	-59%	-$665K	﹤0.01%	3059
2019 Q1	$1.34M	Buy	+151,499	New	+$1.31M	﹤0.01%	2531
2018 Q4	–	Sell	-12,300	Closed	-$147K	–	3392
2018 Q3	$147K	Sell	12,300 -32,700	-73%	-$421K	﹤0.01%	3203
2018 Q2	$709K	Buy	+45,000	New	+$762K	﹤0.01%	2722
2017 Q2	–	Sell	-163,999	Closed	-$2.08M	–	3200
2017 Q1	$2.08M	Sell	163,999 -67,267	-29%	-$893K	﹤0.01%	2215
2016 Q4	$1.98M	Sell	231,266 -5,933	-3%	-$50.7K	﹤0.01%	2245
2016 Q3	$1.65M	Buy	237,199 +192,500	+431%	+$1.31M	﹤0.01%	2307
2016 Q2	$283K	Sell	44,699 -1,043,900	-96%	-$7.33M	﹤0.01%	2955
2016 Q1	$7.67M	Buy	1,088,599 +859,900	+376%	+$4.76M	0.01%	1316
2015 Q4	$1.01M	Sell	228,699 -339,522	-60%	-$1.46M	﹤0.01%	2456
2015 Q3	$2.61M	Buy	568,221 +393,676	+226%	+$2.75M	0.01%	1826
2015 Q2	$1.82M	Buy	+174,545	New	+$2.22M	﹤0.01%	2122
2014 Q4	–	Sell	-266,499	Closed	-$6.92M	–	2968
2014 Q3	$6.92M	Buy	+266,499	New	+$5.87M	0.02%	997

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

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 $552B AUM 44.19% 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

Jim Simons's CENX Position: Q1 2026 in Review

Jim Simons increased its Century Aluminum (CENX) stake by 18% in Q1 2026, buying an estimated $1.08M and bringing the position to 139,499 shares worth $8.19M. The position accounts for 0.01% of the portfolio, ranked #1081.

Jim Simons first reported a position in CENX in Q3 2014 and has held it in 34 quarters since. The position peaked at $17.6M in Q1 2022. 386 funds tracked by Wall St. Rank hold CENX as of Q1 2026.

Jim Simons held 139,499 shares of Century Aluminum worth $8.19M as of Q1 2026.
Jim Simons bought 21,500 Century Aluminum shares in Q1 2026, an estimated $1.08M.
Century Aluminum made up 0.01% of Jim Simons's portfolio in Q1 2026, its #1081 holding.
Jim Simons first reported a position in Century Aluminum in Q3 2014 and has held it in 34 quarters since.
Jim Simons's Century Aluminum position peaked at $17.6M in Q1 2022.
386 funds tracked by Wall St. Rank held Century Aluminum as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.