Gregory Berk
CIK 1306870 · View on SEC EDGAR ↗
Insider
First SEC filing: Jan. 11, 2017 · Latest: Jan. 11, 2017
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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Jan. 9, 2017 | VSTM | A | 150,000 | — | — | 150,000 Direct | — | Acquired | (price as of 2026-08-20) |
| Oct. 29, 2016 | VSTM | A | 50,000 | — | — | 50,000 Direct | — | Acquired | (price as of 2026-08-20) |
| April 15, 2016 | VSTM | A | 370,000 | — | — | 370,000 Direct | — | Acquired | (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| Jan. 9, 2017 | VSTM | Stock Option (Right to Buy) | Common Stock (150,000) | $1.20 | Jan. 9, 2027 | 150,000 | Acquired |
| Oct. 29, 2016 | VSTM | Stock Option (Right to Buy) | Common Stock (50,000) | $1.37 | June 14, 2026 | 50,000 | Acquired |
| April 15, 2016 | VSTM | Stock Option (Right to Buy) | Common Stock (370,000) | $1.51 | April 15, 2026 | 370,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).