Luke C Brandenberg
CIK 1950434 · View on SEC EDGAR ↗
First SEC filing: Oct. 24, 2022 · Latest: Oct. 24, 2022
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. 15, 2023 | GRNT | P | 10,000 | $5.00 | $50,000 | 49,820 Direct | +25.11% | Acquired | 5.3% (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 21, 2023 | GRNT | Employee stock option (right to buy) | Common Stock, par value $0.0001 per share (36,054) | $5.02 | March 31, 2033 | 36,054 | Acquired |
| March 21, 2023 | GRNT | Employee stock option (right to buy) | Common Stock, par value $0.0001 per share (160,000) | $9.22 | March 31, 2033 | 160,000 | 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 |
|---|---|---|---|---|
| Oct. 24, 2022 | GRNT | No securities beneficially owned | 0 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $229,167 | — | $456,114 | — | — | — | $1,738,110 | $2,500,956 |
| 2024 | $500,000 | $366,055 | $481,438 | — | — | — | $6,000 | $1,461,306 |
| 2022 | $71,371 | $150,000 | — | — | — | — | — | $221,371 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.