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 Q2	$5.19K	Buy	+1,730	New	+$8.76K	﹤0.01%	4299
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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Osaic Holdings Scottsdale, Arizona $85.1B AUM 27.35% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Barclays London, United Kingdom $521B AUM 51.41% 1-Year Est. Return

Citigroup New York $303B AUM 53.02% 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: Q2 2026 in Review

Tower Research Capital (TRC) opened a new position in ZeroStack Corp (ZSTK) in Q2 2026: 1,730 shares worth $5.19K. The stake represents ﹤0.01% of the portfolio and ranks #4299 among its holdings. This is a return to the name: Tower Research Capital (TRC) previously reported a position in ZSTK as recently as Q4 2025.

Tower Research Capital (TRC) first reported a position in ZSTK in Q3 2021 and has held it in 11 quarters since. The position peaked at $27K in Q4 2021. 11 funds tracked by Wall St. Rank hold ZSTK as of Q2 2026.

Tower Research Capital (TRC) held 1,730 shares of ZeroStack Corp worth $5.19K as of Q2 2026.
ZeroStack Corp was a new Tower Research Capital (TRC) position in Q2 2026.
ZeroStack Corp made up ﹤0.01% of Tower Research Capital (TRC)'s portfolio in Q2 2026, its #4299 holding.
Tower Research Capital (TRC) first reported a position in ZeroStack Corp in Q3 2021 and has held it in 11 quarters since.
Tower Research Capital (TRC)'s ZeroStack Corp position peaked at $27K in Q4 2021.
11 funds tracked by Wall St. Rank held ZeroStack Corp as of Q2 2026.

Based on Tower Research Capital (TRC)'s 13F filing for Q2 2026, filed 11 Aug 2026.