Tower Research Capital (TRC)’s ZeroStack Corp ZSTK Stock Holding History

Tower Research Capital (TRC)’s Portfolio ZSTK Stock Details ZSTK Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-847	Closed	-$5.3K	–	5245
2025 Q4	$5.3K	Buy	847 +579	+216%	+$6.43K	﹤0.01%	4135
2025 Q3	$4.63K	Buy	+268	New	+$6.19K	﹤0.01%	4318
2024 Q4	–	Sell	-41	Closed	-$2.45K	–	5781
2024 Q3	$2.45K	Sell	41 -28	-41%	-$1.15K	﹤0.01%	4994
2024 Q2	$2.76K	Sell	69 -70	-50%	-$4.01K	﹤0.01%	4966
2024 Q1	$12.5K	Sell	139 -24	-15%	-$1.19K	﹤0.01%	3477
2023 Q4	$8.6K	Buy	163 +109	+202%	+$4.29K	﹤0.01%	4490
2023 Q3	$2.45K	Buy	+54	New	+$4.9K	﹤0.01%	5150
2022 Q2	–	Sell	-13	Closed	-$20K	–	6200
2022 Q1	$20K	Sell	13 -6	-32%	-$8.45K	﹤0.01%	3526
2021 Q4	$27K	Buy	19 +18	+1,800%	+$49.4K	﹤0.01%	3343
2021 Q3	$4K	Buy	+1	New	+$5.83K	﹤0.01%	4967

Other funds holding ZSTK

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

BWM

Bernard Wealth Management Royal Oak, Michigan $234M AUM 27.82% 1-Year Est. Return

Osaic Holdings Scottsdale, Arizona $68.3B AUM 20.5% 1-Year Est. Return

SIS

Sound Income Strategies Ft Lauderdale, Florida $2.23B AUM 11.22% 1-Year Est. Return

KFI

Key Financial Inc West Chester, Pennsylvania $611M AUM 21.11% 1-Year Est. Return

Tower Research Capital (TRC)'s ZSTK Position: Q1 2026 in Review

Tower Research Capital (TRC) sold out of ZeroStack Corp (ZSTK) in Q1 2026, closing a stake of 847 shares — an estimated $5.3K sold.

Tower Research Capital (TRC) first reported a position in ZSTK in Q3 2021 and held it in 10 quarters. The position peaked at $27K in Q4 2021. 10 funds tracked by Wall St. Rank hold ZSTK as of Q1 2026.

Tower Research Capital (TRC) reported no remaining ZeroStack Corp position as of Q1 2026 after selling out during the quarter.
Tower Research Capital (TRC) sold 847 ZeroStack Corp shares in Q1 2026, an estimated $5.3K.
Tower Research Capital (TRC) first reported a position in ZeroStack Corp in Q3 2021 and held it in 10 quarters.
Tower Research Capital (TRC)'s ZeroStack Corp position peaked at $27K in Q4 2021.
10 funds tracked by Wall St. Rank held ZeroStack Corp as of Q1 2026.

Based on Tower Research Capital (TRC)'s 13F filing for Q1 2026, filed 15 May 2026.