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Sigma Planning Corp’s Atomera ATOM Stock Holding History

Sigma Planning Corp’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
2025
Q4 		– Sell
-12,750
Closed -$56.4K – 1303
2025
Q3 		$56.4K Sell
12,750
-12,050
-49% -$49.5K ﹤0.01% 1275
2025
Q2 		$125K Sell
24,800
-24,210
-49% -$129K ﹤0.01% 1197
2025
Q1 		$196K Sell
49,010
-800
-2% -$6.23K 0.01% 1126
2024
Q4 		$578K Buy
49,810
+24,810
+99% +$143K 0.02% 686
2024
Q3 		$65.8K Sell
25,000
-1,200
-5% -$3.74K ﹤0.01% 1180
2024
Q2 		$99.8K Sell
26,200
-400
-2% -$1.89K ﹤0.01% 1137
2024
Q1 		$164K Buy
26,600
+15,000
+129% +$103K 0.01% 1155
2023
Q4 		$81.3K Sell
11,600
-15,150
-57% -$101K 0.01% 814
2023
Q3 		$167K Hold
26,750
– – 0.01% 1108
2023
Q2 		$235K Buy
26,750
+5,075
+23% +$40K 0.01% 1033
2023
Q1 		$138K Buy
21,675
+1,000
+5% +$6.76K ﹤0.01% 1220
2022
Q4 		$129K Buy
20,675
+575
+3% +$4.71K ﹤0.01% 1176
2022
Q3 		$204K Buy
20,100
+1,550
+8% +$18.3K 0.01% 1114
2022
Q2 		$174K Buy
18,550
+2,170
+13% +$23.9K 0.01% 1173
2022
Q1 		$214K Buy
16,380
+2,650
+19% +$39.7K 0.01% 1218
2021
Q4 		$276K Sell
13,730
-20
-0.1% -$470 0.01% 1126
2021
Q3 		$317K Buy
13,750
+400
+3% +$8.68K 0.01% 1032
2021
Q2 		$286K Sell
13,350
-600
-4% -$12.3K 0.01% 1115
2021
Q1 		$342K Sell
13,950
-35,900
-72% -$1.05M 0.01% 924
2020
Q4 		$802K Sell
49,850
-100
-0.2% -$1.04K 0.03% 513
2020
Q3 		$522K Sell
49,950
-4,700
-9% -$49.5K 0.02% 593
2020
Q2 		$492K Buy
54,650
+28,350
+108% +$194K 0.02% 599
2020
Q1 		$92K Buy
26,300
+4,000
+18% +$16.4K 0.01% 855
2019
Q4 		$69K Buy
22,300
+500
+2% +$1.59K ﹤0.01% 1023
2019
Q3 		$82K Buy
21,800
+2,500
+13% +$10.9K ﹤0.01% 960
2019
Q2 		$97K Buy
19,300
+300
+2% +$1.16K 0.01% 958
2019
Q1 		$50K Hold
19,000
– – ﹤0.01% 922
2018
Q4 		$55K Buy
+19,000
New +$75.5K ﹤0.01% 832

Other funds holding ATOM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
AC
Avenir Corporation Alexandria, Virginia $821M AUM 4.23% 1-Year Est. Return
HCM
Hollencrest Capital Management Newport Beach, California $1.54B AUM 30.1% 1-Year Est. Return
QPW
Quantum Private Wealth Tampa, Florida $390M AUM 58.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Baird Financial Group
Baird Financial Group Milwaukee, Wisconsin $72.7B AUM 26.4% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Sigma Planning Corp's ATOM Position: Q4 2025 in Review

Sigma Planning Corp sold out of Atomera (ATOM) in Q4 2025, closing a stake of 12,750 shares — an estimated $56.4K sold.

Sigma Planning Corp first reported a position in ATOM in Q4 2018 and held it in 28 quarters. The position peaked at $802K in Q4 2020. 95 funds tracked by Wall St. Rank hold ATOM as of Q4 2025.

  • Sigma Planning Corp reported no remaining Atomera position as of Q4 2025 after selling out during the quarter.
  • Sigma Planning Corp sold 12,750 Atomera shares in Q4 2025, an estimated $56.4K.
  • Sigma Planning Corp first reported a position in Atomera in Q4 2018 and held it in 28 quarters.
  • Sigma Planning Corp's Atomera position peaked at $802K in Q4 2020.
  • 95 funds tracked by Wall St. Rank held Atomera as of Q4 2025.

Based on Sigma Planning Corp's 13F filing for Q4 2025, filed 30 Jan 2026.