Ping Tak Wu
CIK 1394447 · View on SEC EDGAR ↗
Insider
First SEC filing: March 28, 2007 · Latest: March 28, 2007
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
0 buys (P)
2 sells (S)
Net:
$-457,340
+ 32 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
32 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 26, 2026 | GSIT | S | 30,000 | $11.01 | $330,300 | 148,441 Direct | -16.81% | Disposed | -46.9% (price as of 2026-08-20) |
| May 12, 2026 | GSIT | S | 11,763 | $10.80 | $127,040 | 147,647 Direct | -7.38% | Disposed | -45.8% (price as of 2026-08-20) |
| Aug. 26, 2021 | GSIT | S | 30,000 | $5.31 | $159,300 | 142,605 Direct | -17.38% | Disposed | 10.2% (price as of 2026-08-20) |
| Aug. 12, 2019 | GSIT | S | 8,880 | $8.04 | $71,395 | 139,255 Direct | -5.99% | Disposed | -27.2% (price as of 2026-08-20) |
| Feb. 28, 2017 | GSIT | S | 20,625 | $6.97 | $143,756 | 102,476 Direct | -16.75% | Disposed | -16.1% (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 |
|---|---|---|---|---|---|---|---|
| Aug. 13, 2026 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $6.76 | Aug. 13, 2036 | 30,000 | Acquired |
| May 26, 2026 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.99 | Aug. 1, 2026 | 30,000 | Disposed |
| Feb. 2, 2026 | GSIT | Stock Option (right to buy) | Common Stock (15,000) | $7.23 | Feb. 2, 2036 | 15,000 | Acquired |
| Aug. 4, 2025 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $3.96 | Aug. 4, 2035 | 30,000 | Acquired |
| May 5, 2025 | GSIT | Stock Option (right to buy) | Common Stock (15,000) | $3.68 | May 5, 2035 | 15,000 | Acquired |
| July 29, 2024 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $2.94 | July 29, 2034 | 30,000 | Acquired |
| Jan. 29, 2024 | GSIT | Stock Option (right to buy) | Common Stock (15,000) | $1.92 | Jan. 29, 2034 | 15,000 | Acquired |
| July 31, 2023 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.39 | July 31, 2033 | 30,000 | Acquired |
| Dec. 2, 2022 | GSIT | Stock Option (right to buy) | Common Stock (15,000) | $2.27 | Dec. 2, 2032 | 15,000 | Acquired |
| Aug. 1, 2022 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.08 | Aug. 1, 2032 | 30,000 | Acquired |
| Aug. 26, 2021 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.90 | Oct. 31, 2021 | 30,000 | Disposed |
| Aug. 2, 2021 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $5.58 | Aug. 2, 2031 | 30,000 | Acquired |
| Aug. 3, 2020 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $5.83 | Aug. 3, 2030 | 30,000 | Acquired |
| Aug. 12, 2019 | GSIT | Stock Option (right to buy) | Common Stock (20,625) | $3.43 | Nov. 2, 2019 | 20,625 | Disposed |
| July 29, 2019 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $8.30 | July 29, 2029 | 30,000 | Acquired |
| Aug. 30, 2018 | GSIT | Stock Option (right to buy) | Common Stock (20,625) | $3.37 | Nov. 3, 2018 | 20,625 | Disposed |
| July 31, 2017 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $7.26 | July 31, 2027 | 30,000 | Acquired |
| Feb. 28, 2017 | GSIT | Stock Option (right to buy) | Common Stock (20,625) | $2.49 | Nov. 5, 2017 | 20,625 | Acquired |
| Aug. 1, 2016 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.99 | Aug. 1, 2026 | 30,000 | Acquired |
| Aug. 3, 2015 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.98 | Aug. 3, 2025 | 30,000 | Acquired |
| Aug. 11, 2014 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $5.23 | Aug. 11, 2024 | 30,000 | Acquired |
| July 29, 2013 | GSIT | Stock Option (right to buy) | Common Stock (22,500) | $6.86 | July 29, 2023 | 22,500 | Acquired |
| Oct. 31, 2012 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $5.59 | Oct. 31, 2022 | 30,000 | Acquired |
| Oct. 31, 2011 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $4.90 | Oct. 31, 2021 | 30,000 | Acquired |
| Nov. 1, 2010 | GSIT | Stock Option (right to buy) | Common Stock (30,000) | $6.82 | Nov. 1, 2020 | 30,000 | Acquired |
| Nov. 3, 2008 | GSIT | Stock Option (right to buy) | Common Stock (20,625) | $3.37 | Nov. 3, 2018 | 20,625 | Acquired |
| Nov. 5, 2007 | GSIT | Stock Option (right to buy) | Common Stock (20,625) | $2.49 | Nov. 5, 2017 | 20,625 | 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.
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
GSIT
President, US Operations| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2021 | $275,052 | — | — | $67,332 | $31,250 | — | — | $373,634 |
| 2020 | $275,052 | — | — | $87,126 | $60,292 | — | — | $422,470 |
| 2019 | $267,041 | — | — | $72,549 | $192,667 | — | — | $532,257 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.