Clifford Starke
CIK 1955468 · View on SEC EDGAR ↗
First SEC filing: Jan. 3, 2023 · Latest: July 21, 2025
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 13, 2024 | ZSTK | P | 6,795 | $0.95 | $6,455 | 6,846 Direct | +13323.53% | Acquired | -86.1% (price as of 2026-08-21) |
| Sept. 5, 2024 | ZSTK | P | 51 | $0.95 | $48 | 474,046 Direct | +0.01% | Acquired | -86.1% (price as of 2026-08-21) |
| April 8, 2024 | ZSTK | P | 526,315 | $1.90 | $999,998 | 565,714 Indirect | +1335.86% | Acquired | -93.0% (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 (575,319) | $0.58 | Aug. 14, 2034 | 575,319 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (575,319) | $0.92 | Aug. 14, 2034 | 575,319 | Disposed |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (1,028,665) | $0.58 | Dec. 15, 2034 | 1,028,665 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (1,028,665) | $1.21 | Dec. 15, 2034 | 1,028,665 | Disposed |
| Aug. 14, 2024 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (575,319) | $0.92 | Aug. 14, 2034 | 575,319 | Acquired |
| Dec. 15, 2023 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares (1,028,665) | $1.21 | Dec. 15, 2033 | 1,028,665 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
ZSTK
CEO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2024 | $420,000 | $36,000 | — | — | — | — | — | $2,720,435 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.