ZSTK ZeroStack Corp.: institutional ownership and insider trading
11 funds reported holding $184K of ZeroStack Corp. in their latest 13F filings; in Q2 2026 funds net sold $9.03K, with 3 new positions and 2 funds selling out; over the last 12 months insiders bought $3.46M and sold $7.57K on the open market.
Largest institutional holders of ZSTK
- VANGUARD CAPITAL MANAGEMENT LLC — $76.3K
- GEODE CAPITAL MANAGEMENT, LLC — $63.0K
- VANGUARD FIDUCIARY TRUST CO — $37.9K
- Tower Research Capital LLC (TRC) — $5.19K
- UBS Group AG (UBS) — $1.32K
- OSAIC HOLDINGS, INC. — $36
- MORGAN STANLEY (MS, MS-PA, MS-PE, MS-PF, MS-PI, MS-PK, MS-PL, MS-PO, MS-PP, MS-PQ) — $21
- BARCLAYS PLC (BCS, BCLYF) — $9
- CITIGROUP INC (C, C-PN) — $3
- Key FInancial Inc — $3
Recent ZSTK insider trades
- Aug 19, 2026: Rong Rudy sold 1,000 shares ($7.57K)
- Jul 20, 2026: Heinrich Michael bought 4,608,575 shares ($3.46M)
5%+ owners
- Heinrich Michael: 30.2% (Schedule 13D/A, filed Jul 21, 2026)
- Puple AI Inc.: 8.3% (Schedule 13G, filed Sep 2, 2026)
- BLOCKCAT PTE. LTD.: 8.3% (Schedule 13G, filed Sep 4, 2026)