Mark J. Holdbrook
CIK 1827564 · View on SEC EDGAR ↗
Insider
First SEC filing: Oct. 15, 2020 · Latest: Oct. 15, 2020
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 |
|---|---|---|---|---|---|---|---|---|---|
| March 16, 2023 | TARS | S | 187 | $13.43 | $2,511 | 3,577 Direct | -4.97% | Disposed | 439.1% (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 |
|---|---|---|---|---|---|---|---|
| March 15, 2023 | TARS | Restricted Stock Units | Common Stock (2,653) | — | — | 2,653 | Disposed |
| March 2, 2021 | TARS | Stock Option (right to buy) | Common Stock (14,300) | $34.72 | March 2, 2031 | 14,300 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Oct. 15, 2020 | TARS | Employee Stock Option (right to buy)→ Common Stock (83,809) | 83,809 | Direct |
| Oct. 15, 2020 | TARS | Employee Stock Option (right to buy)→ Common Stock (9,632) | 9,632 | Direct |
| Oct. 15, 2020 | TARS | Employee Stock Option (right to buy)→ Common Stock (17,245) | 17,245 | Direct |