Vaiman Dany
Insider
Activist
First SEC filing: Jan. 3, 2023 · Latest: Dec. 23, 2025
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| July 20, 2026 | ZSTK | A | 250,000 | · | · | 250,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2025 | ZSTK | A | 235,604 | · | · | 235,604 Direct | · | Acquired | (price as of 2026-10-05) |
| June 30, 2025 | ZSTK | A | 372,500 | · | · | 372,500 Direct | · | Acquired | (price as of 2026-10-05) |
| June 30, 2025 | ZSTK | D | 372,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 30, 2025 | ZSTK | A | 191,773 | · | · | 191,773 Direct | · | Acquired | (price as of 2026-10-05) |
| June 30, 2025 | ZSTK | D | 191,773 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 30, 2025 | ZSTK | A | 342,888 | · | · | 342,888 Direct | · | Acquired | (price as of 2026-10-05) |
| June 30, 2025 | ZSTK | D | 342,888 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 15, 2024 | ZSTK | A | 372,500 | · | · | 372,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 14, 2024 | ZSTK | A | 191,773 | · | · | 191,773 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 15, 2023 | ZSTK | A | 342,888 | · | · | 342,888 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 15, 2023 | ZSTK | A | 149,024 | · | · | 170,850 Direct | +682.78% | Acquired | (price as of 2026-10-05) |
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 |
|---|---|---|---|---|---|---|---|
| July 20, 2026 | ZSTK | Employee Stock Option ("Right to Buy") | Common Shares | $5.10 | May 5, 2036 | 250,000 | Acquired |
| Dec. 19, 2025 | ZSTK | Employee Stock Option ("Right to Buy") | Common Shares | $7.31 | Dec. 19, 2035 | 235,604 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $0.58 | Dec. 15, 2034 | 372,500 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $1.30 | Dec. 15, 2034 | 372,500 | Disposed |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $0.58 | Aug. 14, 2034 | 191,773 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $0.92 | Aug. 14, 2034 | 191,773 | Disposed |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $0.58 | Dec. 15, 2034 | 342,888 | Acquired |
| June 30, 2025 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $1.21 | Dec. 15, 2034 | 342,888 | Disposed |
| Dec. 15, 2024 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $1.30 | Dec. 15, 2034 | 372,500 | Acquired |
| Aug. 14, 2024 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $0.92 | Aug. 14, 2034 | 191,773 | Acquired |
| Dec. 15, 2023 | ZSTK | Stock Appreciation Rights ("SARs") | Common Shares | $1.21 | Dec. 15, 2033 | 342,888 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Jan. 3, 2023 | ZSTK | Common Shares | 436,529 | Direct |