Harold Wolkin
CIK 1750740 · View on SEC EDGAR ↗
Insider
First SEC filing: July 2, 2025 · Latest: July 2, 2025
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 3 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
3 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 6, 2024 | ZSTK | P | 5,000 | $0.95 | $4,750 | 10,000 Direct | +100.00% | Acquired | -86.1% (price as of 2026-08-21) |
| Sept. 6, 2024 | ZSTK | P | 15,000 | $0.98 | $14,700 | 25,000 Direct | +150.00% | Acquired | -86.5% (price as of 2026-08-21) |
| Sept. 6, 2024 | ZSTK | P | 5,000 | $0.96 | $4,800 | 5,000 Direct | — | Acquired | -86.2% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (30,000) | $0.58 | Dec. 15, 2034 | 30,000 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (30,000) | $1.30 | Dec. 15, 2034 | 30,000 | Disposed |
| Dec. 15, 2024 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (30,000) | $1.30 | Dec. 15, 2034 | 30,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).