Two Sigma Investments’s ATI ATI Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$480K	Sell	3,300 -300	-8%	-$41.8K	﹤0.01%	3768
2025 Q4	$413K	Buy	+3,600	New	+$351K	﹤0.01%	3420
2019 Q1	–	Sell	-33,900	Closed	-$738K	–	3003
2018 Q4	$738K	Buy	33,900 +14,000	+70%	+$363K	﹤0.01%	1846
2018 Q3	$588K	Buy	+19,900	New	+$535K	﹤0.01%	2336
2018 Q2	–	Sell	-25,700	Closed	-$609K	–	3292
2018 Q1	$609K	Buy	25,700 +14,700	+134%	+$394K	﹤0.01%	2357
2017 Q4	$266K	Sell	11,000 -39,400	-78%	-$938K	﹤0.01%	2789
2017 Q3	$1.21M	Sell	50,400 -76,800	-60%	-$1.52M	﹤0.01%	1615
2017 Q2	$2.16M	Buy	+127,200	New	+$2.14M	0.01%	1361
2016 Q3	–	Sell	-10,000	Closed	-$128K	–	3077
2016 Q2	$128K	Buy	+10,000	New	+$143K	﹤0.01%	2804
2015 Q4	–	Sell	-26,000	Closed	-$369K	–	2659
2015 Q3	$369K	Buy	+26,000	New	+$538K	﹤0.01%	1690

Other funds holding ATI

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

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

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

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

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

Two Sigma Investments increased its ATI (ATI) stake by 804% in Q1 2026, buying an estimated $2.2M and bringing the position to 17,775 shares worth $2.59M. The position accounts for ﹤0.01% of the portfolio, ranked #2571.

Two Sigma Investments first reported a position in ATI in Q4 2015 and has held it in 33 quarters since. The position peaked at $59.3M in Q2 2024. 673 funds tracked by Wall St. Rank hold ATI as of Q1 2026.

Two Sigma Investments held 17,775 shares of ATI worth $2.59M as of Q1 2026.
Two Sigma Investments bought 15,808 ATI shares in Q1 2026, an estimated $2.2M.
ATI made up ﹤0.01% of Two Sigma Investments's portfolio in Q1 2026, its #2571 holding.
Two Sigma Investments first reported a position in ATI in Q4 2015 and has held it in 33 quarters since.
Two Sigma Investments's ATI position peaked at $59.3M in Q2 2024.
673 funds tracked by Wall St. Rank held ATI as of Q1 2026.

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