NASDAQ · ZSTK

ZeroStack Corp.

Closing price · Nov 13, 2026 $2.74
Last insider buy price $0.75 Paid by Executive Chairman, Director Michael Heinrich on Jul 20, 2026 (Form 4). Not today's price.

Latest quarter · ended Jun 30, 2026

Sales grew and cash improved

descriptionFiled Jul 31, 2026
Revenue growthFaster
+40.7%
Quarter ended Sep 30, 2024: −58.2% sales vs. a year beforeQuarter ended Dec 31, 2024: −57.5% sales vs. a year beforeQuarter ended Mar 31, 2025: −61.9% sales vs. a year beforeQuarter ended Jun 30, 2025: −38.1% sales vs. a year beforeQuarter ended Sep 30, 2025: +34.7% sales vs. a year beforeQuarter ended Dec 31, 2025: +22.3% sales vs. a year beforeQuarter ended Mar 31, 2026: +5.9% sales vs. a year beforeQuarter ended Jun 30, 2026: +40.7% sales vs. a year before
Sep '24Jun '26
$13.7M vs. $9.71M a year ago
Gross marginBetter
11.8%
Quarter ended Sep 30, 2024: 6.8% gross marginQuarter ended Dec 31, 2024: 3.7% gross marginQuarter ended Mar 31, 2025: 7.8% gross marginQuarter ended Jun 30, 2025: 6.4% gross marginQuarter ended Sep 30, 2025: 3.4% gross marginQuarter ended Dec 31, 2025: 1.7% gross marginQuarter ended Mar 31, 2026: 43.2% gross marginQuarter ended Jun 30, 2026: 11.8% gross margin
Sep '24Jun '26
vs. 6.4% a year ago
Cash from operationsBetter
$1.37M
Quarter ended Sep 30, 2024: −$2.08M cash from operationsQuarter ended Dec 31, 2024: −$1.35M cash from operationsQuarter ended Mar 31, 2025: −$2.66M cash from operationsQuarter ended Jun 30, 2025: −$2.89M cash from operationsQuarter ended Sep 30, 2025: $33K cash from operationsQuarter ended Dec 31, 2025: −$3.16M cash from operationsQuarter ended Mar 31, 2026: −$3.85M cash from operationsQuarter ended Jun 30, 2026: $1.37M cash from operations
Sep '24Jun '26
vs. −$2.89M a year ago
Share countBuying back
−22.5%
Quarter ended Sep 30, 2024: 13.37M sharesQuarter ended Dec 31, 2024: 19.44M sharesQuarter ended Mar 31, 2025: 22.57M sharesQuarter ended Jun 30, 2025: 22.57M sharesQuarter ended Sep 30, 2025: 741,261 sharesQuarter ended Dec 31, 2025: 2.43M sharesQuarter ended Mar 31, 2026: 2.43M sharesQuarter ended Jun 30, 2026: 17.49M shares
Sep '24Jun '26
17.49M shares vs. 22.57M a year ago

Numbers come from the company's own 10-Q and 10-K reports filed with the SEC. Each bar is one quarter, oldest on the left. The colored bar is the latest. Hover over or tap a bar to see its number.

Smart money pulse

What insiders and funds are doing

Selling Insiders: as of Nov 13 Funds: as of Jun 30, 2026
−1000+100 −100
  • info
    1 real insider sale in 12 months. $7.57K in total, not counting planned sales.

−100 means everyone selling, +100 everyone buying. This is data, not advice.

How the Pulse works

Pulse runs from −100 (everyone selling) to +100 (everyone buying). Half comes from insiders: real buyers vs. real sellers in the last 90 days (Form 4). Half comes from funds: funds that bought vs. funds that sold last quarter (13F). 13F is a snapshot of long positions on the last day of the quarter, filed up to 45 days later. It does not show short positions or trades since then.

Who owns it

13 funds report owning ZSTK, up from 11

Holdings as of Jun 30, 2026
New4
Added0
Held6
Trimmed3
Sold out2

Insider trades · last 12 months

Real buys and sales

● Open-market buy● Open-market sale
CEOCFOOther officersDirectorsDecJanFebMarAprMayJunJulAugSepOctNovCode X · Jul 20 · 5.95M shOpen-market buy · Jul 20 · $3.46MOpen-market sale · Aug 19 · $7.57K
CEOCFOOther officersDirectorsJunJulAugSepOctNovCode X · Jul 20 · 5.95M shOpen-market buy · Jul 20 · $3.46MOpen-market sale · Aug 19 · $7.57K

Last 6 months. A wider screen shows 12.

Showing 2 real trades. Bigger dot means a bigger trade.

Real trades, newest first

Aug 19 Rudy Rong President Open-market sale $7.57K 1,000 sh at $7.57 Sold 100% of stake
Jul 20 Michael Heinrich Executive Chairman, Director Open-market buy $3.46M 4,608,575 sh at $0.75

Showing every filing. Dashed circles are routine: grants, tax withholding, option exercises and planned sales.

Top holders

Biggest funds in ZSTK

As of Jun 30, 2026
FundOwnsValueChange
Bolton Securities Corporation0.2%$80.8KSame
Vanguard Capital Management LLC0.1%$76.3KSame
Geode Capital Management, LLC0.1%$63K−17%
Vanguard Fiduciary Trust Co0.1%$37.9KSame
Tower Research Capital LLC (trc)<0.1%$5.19KNew

"Owns" is shares reported divided by shares outstanding.

Where this data comes from. Insider trades, fund holdings, activist stakes and company results come from public SEC EDGAR filings (Forms 4, 13F, 13D/13G, 10-Q and 8-K). Congress trades come from the STOCK Act reports members file with the House Clerk and the Senate. Daily closing prices come from post-no-preference/stocks on DoltHub, a community-run database shared under CC BY-SA 4.0; the prices we show stay under that license. They are each day's close, not live or official exchange prices.

This is data, not investment advice. About StockToast