Ken Griffin’s American Shared Hospital Services AMS Stock Holding History

Ken Griffin’s Portfolio AMS Stock Details AMS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$41.4K	Buy	+28,558	New	+$59.8K	﹤0.01%	12475
2024 Q1	–	Sell	-24,072	Closed	-$57.3K	–	14498
2023 Q4	$57.3K	Buy	24,072 +5,391	+29%	+$13K	﹤0.01%	11637
2023 Q3	$46.1K	Sell	18,681 -14,542	-44%	-$37.9K	﹤0.01%	11844
2023 Q2	$84.9K	Buy	33,223 +19,381	+140%	+$53.3K	﹤0.01%	11168
2023 Q1	$38.9K	Buy	+13,842	New	+$42.7K	﹤0.01%	12459
2021 Q3	–	Sell	-30,398	Closed	-$89K	–	13744
2021 Q2	$89K	Buy	30,398 +3,178	+12%	+$8.81K	﹤0.01%	13006
2021 Q1	$75K	Buy	27,220 +16,922	+164%	+$44K	﹤0.01%	12684
2020 Q4	$23K	Sell	10,298 -5,607	-35%	-$10.9K	﹤0.01%	10758
2020 Q3	$29K	Buy	+15,905	New	+$32.3K	﹤0.01%	9767
2019 Q2	–	Sell	-14,761	Closed	-$41K	–	9116
2019 Q1	$41K	Buy	+14,761	New	+$38.8K	﹤0.01%	8891

Other funds holding AMS

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Corient Private Wealth Miami, Florida $78.6B AUM 28.08% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

BCM

Bridgeway Capital Management Houston, Texas $4.97B AUM 44.96% 1-Year Est. Return

LPL Financial San Diego, California $445B AUM 25.58% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

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

DRW Securities Chicago, Illinois $7.21B AUM 20.54% 1-Year Est. Return

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

JIR

James Investment Research Alpha, Ohio $984M AUM 36.03% 1-Year Est. Return

Ken Griffin's AMS Position: Q1 2026 in Review

Ken Griffin opened a new position in American Shared Hospital Services (AMS) in Q1 2026: 28,558 shares worth $41.4K. The stake represents ﹤0.01% of the portfolio and ranks #12475 among its holdings. This is a return to the name: Ken Griffin previously reported a position in AMS as recently as Q4 2023.

Ken Griffin first reported a position in AMS in Q1 2019 and has held it in 10 quarters since. The position peaked at $89K in Q2 2021. 20 funds tracked by Wall St. Rank hold AMS as of Q1 2026.

Ken Griffin held 28,558 shares of American Shared Hospital Services worth $41.4K as of Q1 2026.
American Shared Hospital Services was a new Ken Griffin position in Q1 2026.
American Shared Hospital Services made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #12475 holding.
Ken Griffin first reported a position in American Shared Hospital Services in Q1 2019 and has held it in 10 quarters since.
Ken Griffin's American Shared Hospital Services position peaked at $89K in Q2 2021.
20 funds tracked by Wall St. Rank held American Shared Hospital Services as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.