Jim Simons’s Atomera ATOM Stock Holding History

Jim Simons’s Portfolio ATOM Stock Details ATOM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$621K	Buy	+163,066	New	+$614K	﹤0.01%	2510
2025 Q4	–	Sell	-60,300	Closed	-$267K	–	3230
2025 Q3	$267K	Buy	+60,300	New	+$248K	﹤0.01%	3049
2024 Q4	–	Sell	-57,500	Closed	-$151K	–	3561
2024 Q3	$151K	Sell	57,500 -76,800	-57%	-$239K	﹤0.01%	3182
2024 Q2	$512K	Buy	+134,300	New	+$633K	﹤0.01%	2680
2024 Q1	–	Sell	-17,870	Closed	-$125K	–	3697
2023 Q4	$125K	Sell	17,870 -4,530	-20%	-$30.1K	﹤0.01%	3245
2023 Q3	$140K	Buy	+22,400	New	+$160K	﹤0.01%	3174
2023 Q2	–	Sell	-31,204	Closed	-$199K	–	3902
2023 Q1	$199K	Buy	+31,204	New	+$211K	﹤0.01%	3283
2022 Q1	–	Sell	-100,797	Closed	-$2.03M	–	4066
2021 Q4	$2.03M	Buy	+100,797	New	+$2.37M	﹤0.01%	2129
2021 Q3	–	Sell	-118,468	Closed	-$2.54M	–	3462
2021 Q2	$2.54M	Buy	+118,468	New	+$2.43M	﹤0.01%	2085

Other funds holding ATOM

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

Avenir Corporation Alexandria, Virginia $821M AUM 4.23% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Baird Financial Group Milwaukee, Wisconsin $72.7B AUM 26.4% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

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

QPW

Quantum Private Wealth Tampa, Florida $390M AUM 58.18% 1-Year Est. Return

HCM

Hollencrest Capital Management Newport Beach, California $1.54B AUM 30.1% 1-Year Est. Return

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

Jim Simons's ATOM Position: Q1 2026 in Review

Jim Simons opened a new position in Atomera (ATOM) in Q1 2026: 163,066 shares worth $621K. The stake represents ﹤0.01% of the portfolio and ranks #2510 among its holdings. This is a return to the name: Jim Simons previously reported a position in ATOM as recently as Q3 2025.

Jim Simons first reported a position in ATOM in Q2 2021 and has held it in 9 quarters since. The position peaked at $2.54M in Q2 2021. 108 funds tracked by Wall St. Rank hold ATOM as of Q1 2026.

Jim Simons held 163,066 shares of Atomera worth $621K as of Q1 2026.
Atomera was a new Jim Simons position in Q1 2026.
Atomera made up ﹤0.01% of Jim Simons's portfolio in Q1 2026, its #2510 holding.
Jim Simons first reported a position in Atomera in Q2 2021 and has held it in 9 quarters since.
Jim Simons's Atomera position peaked at $2.54M in Q2 2021.
108 funds tracked by Wall St. Rank held Atomera as of Q1 2026.

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