Two Sigma Investments’s Actinium Pharmaceuticals ATNM Stock Holding History

Two Sigma Investments’s Portfolio ATNM Stock Details ATNM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$336K	Buy	337,168 +127,476	+61%	+$152K	﹤0.01%	3997
2025 Q4	$285K	Sell	209,692 -24,601	-11%	-$35.9K	﹤0.01%	3600
2025 Q3	$375K	Buy	234,293 +187,748	+403%	+$306K	﹤0.01%	3119
2025 Q2	$65.2K	Buy	+46,545	New	+$69.7K	﹤0.01%	3041
2023 Q3	–	Sell	-19,468	Closed	-$144K	–	2947
2023 Q2	$144K	Sell	19,468 -26,075	-57%	-$222K	﹤0.01%	2703
2023 Q1	$430K	Sell	45,543 -167,777	-79%	-$1.77M	﹤0.01%	2274
2022 Q4	$2.27M	Buy	213,320 +197,494	+1,248%	+$2M	0.01%	1264
2022 Q3	$117K	Sell	15,826 -41,392	-72%	-$257K	﹤0.01%	2206
2022 Q2	$275K	Buy	+57,218	New	+$325K	﹤0.01%	2059

Other funds holding ATNM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Gagnon Securities New York $433M AUM 29.08% 1-Year Est. Return

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

Two Sigma Investments's ATNM Position: Q1 2026 in Review

Two Sigma Investments increased its Actinium Pharmaceuticals (ATNM) stake by 61% in Q1 2026, buying an estimated $152K and bringing the position to 337,168 shares worth $336K. The position accounts for ﹤0.01% of the portfolio, ranked #3997.

Two Sigma Investments first reported a position in ATNM in Q2 2022 and has held it in 9 quarters since. The position peaked at $2.27M in Q4 2022. 54 funds tracked by Wall St. Rank hold ATNM as of Q1 2026.

Two Sigma Investments held 337,168 shares of Actinium Pharmaceuticals worth $336K as of Q1 2026.
Two Sigma Investments bought 127,476 Actinium Pharmaceuticals shares in Q1 2026, an estimated $152K.
Actinium Pharmaceuticals made up ﹤0.01% of Two Sigma Investments's portfolio in Q1 2026, its #3997 holding.
Two Sigma Investments first reported a position in Actinium Pharmaceuticals in Q2 2022 and has held it in 9 quarters since.
Two Sigma Investments's Actinium Pharmaceuticals position peaked at $2.27M in Q4 2022.
54 funds tracked by Wall St. Rank held Actinium Pharmaceuticals as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.