Stocks Health care ZSTK
NASDAQ · Health careZeroStack Corp. (ZSTK)
ZeroStack Corp. brought in $40M of revenue over the twelve months to June 30, 2026, up 113.8% from a year earlier. It posted a net loss of $177.8M. In fiscal 2025 capital spending exceeded operating cash flow by $8.8M. At June 30, 2026 it held $2.6M in cash against $2.4M of debt. Its latest periodic report to the SEC is the quarterly report (10-Q) filed on July 31, 2026.
Key facts about ZeroStack Corp.
- Net worth
- ZeroStack Corp. has a market value (market cap) of $49.3M at the latest share price, and shareholders' equity of $13.8M on its balance sheet at June 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
- Revenue and profit
- In fiscal 2025 revenue was $35.7M (-0.5% year on year), with a net loss of $119.7M. Over the 12 months to June 30, 2026: revenue $40M, net loss $177.8M.
- Cash flow
- In fiscal 2025 operations used $8.7M of cash.
- Latest report
- The latest periodic report (quarterly report, 10-Q) was filed with the SEC on July 31, 2026 and covers the period to June 30, 2026. Open on SEC EDGAR
- Next earnings report
- ZeroStack Corp.'s next report was expected around October 16, 2026 and is not on file with the SEC yet.
What ZeroStack Corp. does
ZeroStack Corp. is registered with the SEC under industry code SIC 6199 (Finance Services). Its shares trade on NASDAQ under the ticker ZSTK.
Revenue and profit by year
Key figures
| Fiscal year | Revenue | Net income | Diluted EPS | Free cash flow |
|---|---|---|---|---|
| 2025 | $35.7M | -$119.7M | -$43.49 | -$8.8M |
| 2024 | $35.9M | -$15.9M | -$50.02 | -$5.2M |
| 2023 | $76.1M | -$57M | -$298.20 | -$8.6M |
| 2022 | $33.4M | -$52.4M | -$526.36 | -$17.2M |
| 2021 | $9M | -$21.4M | -$18.47 | -$24.9M |
| 2021 | $106K | -$14.3M | -$18.08 | -$8.4M |
Earnings: every quarter and the next report date
Full financial statements: income, balance sheet and cash flow
Where ZSTK ranks in Health care
Latest SEC filings
What ZeroStack Corp. has filed recently, newest first. Each links to the original document on SEC EDGAR.
- September 4, 2026Form POS AM filing POS AM
- September 4, 2026
- September 4, 2026Passive stake (5% or more) SCHEDULE 13G
- September 2, 2026Passive stake (5% or more) SCHEDULE 13G
- August 28, 2026Form POS AM filing POS AM
- August 28, 2026Form POS AM filing POS AM
- August 28, 2026Form POS AM filing POS AM
- August 28, 2026Form POS AM filing POS AM
- August 26, 2026
- August 26, 2026
Insider trades
What the people running ZeroStack Corp. did with its shares, from the Form 4 filings they must send the SEC within two business days.
Insiders sold $7.6K worth of shares in the last 90 days and bought none on the open market.
| Date | Insider | What | Shares | Value |
|---|---|---|---|---|
| August 19, 2026 | Rong RudyPresident | Sold | 1,000 | $7.6K |
| July 20, 2026 | Reis-Faria DanielCEO, Director | Exercised options | 5,954,743 | $595.5 |
| July 20, 2026 | Heinrich MichaelExecutive Chairman, Director | Boughtindirect | 4,608,575 | $3.5M |
Who owns ZSTK
Three views from three kinds of SEC filings, each with its own date. They overlap and are not added up.
5% holders
| Holder | Of class | Filed |
|---|---|---|
| Reis-Faria Daniel13D, may seek influence | 37.5% | July 21, 2026 |
| Heinrich Michael13D, may seek influence with 1 related filers | 30.2% | July 21, 2026 |
| Starke Clifford13D, may seek influence | 17.1% | July 21, 2025 |
| Blockcat Pte. Ltd.13G, passive | 8.3% | September 4, 2026 |
| Puple AI Inc.13G, passive | 8.3% | September 2, 2026 |
Largest institutional holders
Insiders
2 insiders reported holding 10,563,318 shares in total, about $29.8M at the last price.
| Holder | Shares |
|---|---|
| Reis-Faria DanielCEO, Director | 5,954,743 |
| Heinrich MichaelExecutive Chairman, Director | 4,608,5754,608,575 held indirectly |
Questions about ZSTK
What does ZeroStack Corp. do?
ZeroStack Corp. is a company in the Health care sector, listed on NASDAQ as ZSTK. Its shares trade on NASDAQ under the ticker ZSTK.
What is ZeroStack Corp.'s net worth?
ZeroStack Corp. has a market value (market cap) of $49.3M at the latest share price, and shareholders' equity of $13.8M on its balance sheet at June 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
Is ZeroStack Corp. profitable?
No. Over the twelve months to June 30, 2026 it reported a net loss of $177.8M on revenue of $40M.
How much revenue does ZeroStack Corp. make?
Over the twelve months to June 30, 2026 ZeroStack Corp. reported revenue of $40M. That is 113.8% more than a year earlier.
When did ZeroStack Corp. last report?
Its most recent periodic report is the quarterly report (10-Q) filed on July 31, 2026. It covers the period to June 30, 2026. Its newest filing of any kind is the form POS AM filing from September 4, 2026.
When is ZeroStack Corp.'s next earnings report?
ZeroStack Corp.'s next report was expected around October 16, 2026 and is not on file with the SEC yet.
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Where the numbers come from
Financial figures are the values ZeroStack Corp. tagged in its own SEC filings (XBRL), taken from the latest filing for each period, so restatements replace older figures. Revenue, profit and cash flow are for full fiscal years unless marked as the last twelve months, which is the sum of the four most recent quarters. Where a company reports only the full year, the fourth quarter is the year minus the first three.
Prices are delayed end-of-day market data in the listing currency, and market cap moves with the price. P/E is shown only when earnings per share are positive. Nothing here is investment advice.