Robert Barker
CIK 2007837 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 21, 2024 · Latest: Nov. 21, 2024
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 17 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 |
|---|---|---|---|---|---|---|---|---|---|
| June 30, 2026 | GCTS | A | 9,259 | — | — | 151,710 Direct | +6.50% | Acquired | (price as of 2026-08-19) |
| March 31, 2026 | GCTS | A | 24,122 | — | — | 142,451 Direct | +20.39% | Acquired | (price as of 2026-08-19) |
| Dec. 31, 2025 | GCTS | A | 22,916 | — | — | 118,329 Direct | +24.02% | Acquired | (price as of 2026-08-19) |
| Sept. 30, 2025 | GCTS | A | 18,092 | — | — | 95,413 Direct | +23.40% | Acquired | (price as of 2026-08-19) |
| June 30, 2025 | GCTS | A | 18,456 | — | — | 77,321 Direct | +31.35% | Acquired | (price as of 2026-08-19) |
| March 31, 2025 | GCTS | A | 16,768 | — | — | 58,865 Direct | +39.83% | Acquired | (price as of 2026-08-19) |
| Dec. 31, 2024 | GCTS | A | 11,802 | — | — | 41,162 Direct | +40.20% | Acquired | (price as of 2026-08-19) |
| Sept. 30, 2024 | GCTS | A | 8,208 | — | — | 29,360 Direct | +38.80% | Acquired | (price as of 2026-08-19) |
| June 30, 2024 | GCTS | A | 5,278 | — | — | 21,152 Direct | +33.25% | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 1,867 | — | — | 1,867 Direct | — | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 933 | — | — | 933 Direct | — | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 3,735 | — | — | 16,809 Direct | +28.57% | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 13,074 | — | — | 13,074 Direct | — | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 1,867 | — | — | 1,867 Direct | — | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 933 | — | — | 933 Direct | — | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 3,735 | — | — | 3,735 Direct | — | Acquired | (price as of 2026-08-19) |
| March 26, 2024 | GCTS | A | 13,073 | — | — | 13,073 Direct | — | Acquired | (price as of 2026-08-19) |
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 26, 2024 | GCTS | Stock Option (Right to Buy) | Common Stock (1,867) | $0.11 | June 8, 2030 | 1,867 | Acquired |
| March 26, 2024 | GCTS | Stock Option (Right to Buy) | Common Stock (933) | $0.11 | April 19, 2029 | 933 | Acquired |
| March 26, 2024 | GCTS | Stock Option (Right to Buy) | Common Stock (1,867) | $0.11 | Jan. 1, 2030 | 1,867 | Acquired |
| March 26, 2024 | GCTS | Stock Option (Right to Buy) | Common Stock (933) | $0.11 | Jan. 1, 2029 | 933 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).