Sherry Grisewood
CIK 1658039 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 13, 2015 · Latest: Nov. 13, 2015
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 4 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 |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 16, 2018 | MRKR | A | 4,106 | — | — | 19,582 Direct | +26.53% | Acquired | (price as of 2026-08-20) |
| Aug. 29, 2017 | MRKR | A | 13,115 | — | — | 15,476 Direct | +555.48% | Acquired | (price as of 2026-08-20) |
| Nov. 12, 2015 | MRKR | A | 150,000 | — | — | 150,000 Direct | — | Acquired | (price as of 2026-08-20) |
| Feb. 26, 2014 | MRKR | J | 28,125 | $0.80 | $22,500 | 28,330 Direct | +13719.51% | Acquired | -98.7% (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 |
|---|---|---|---|---|---|---|---|
| Nov. 12, 2015 | MRKR | Employee Stock Option (Right to Buy) | Common Stock (150,000) | — | Nov. 12, 2025 | 150,000 | 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 |
|---|---|---|---|---|
| Nov. 13, 2015 | MRKR | Common Stock | 205 | Direct |