Yung H. Chyung
CIK 1740377 · View on SEC EDGAR ↗
First SEC filing: May 23, 2018 · Latest: May 23, 2018
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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 18, 2025 | KROS | A | 44,000 | — | — | 44,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Nov. 8, 2024 | KROS | A | 110,000 | — | — | 110,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 14, 2022 | SRRK | A | 37,500 | — | — | 37,500 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 14, 2022 | SRRK | A | 37,500 | — | — | 258,496 Direct | +16.97% | Acquired | (price as of 2026-08-21) |
| Jan. 18, 2022 | SRRK | F | 1,421 | $19.46 | $27,653 | 220,996 Direct | -0.64% | Disposed | 183.2% (price as of 2026-08-21) |
| Feb. 1, 2021 | SRRK | A | 52,500 | — | — | 225,534 Direct | +30.34% | Acquired | (price as of 2026-08-21) |
| Feb. 1, 2021 | SRRK | A | 15,750 | — | — | 15,750 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 6, 2020 | SRRK | A | 75,000 | — | — | 75,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Jan. 31, 2019 | SRRK | A | 56,000 | — | — | 56,000 Direct | — | Acquired | (price as of 2026-08-21) |
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. 8, 2024 | KROS | Employee Stock Option (right to buy) | Common Stock (110,000) | $67.91 | Nov. 7, 2034 | 110,000 | Acquired |
| Feb. 14, 2022 | SRRK | Stock Option (Right to Buy) | Common Stock (37,500) | $18.08 | Feb. 14, 2032 | 37,500 | Acquired |
| Feb. 1, 2021 | SRRK | Stock Option (Right to Buy) | Common Stock (52,500) | $58.93 | Feb. 1, 2031 | 52,500 | Acquired |
| Feb. 6, 2020 | SRRK | Stock Option (Right to Buy) | Common Stock (75,000) | $13.52 | Jan. 1, 2024 | 75,000 | Acquired |
| Jan. 31, 2019 | SRRK | Stock Option (Right to Buy) | Common Stock (56,000) | $15.11 | Jan. 31, 2029 | 56,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 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.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2019 | $416,800 | — | — | $605,422 | $145,880 | — | $1,425 | $1,169,527 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.