Hoyoung Huh
CIK 1401267 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 22, 2024 · Latest: June 12, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 56 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 11, 2026 | PLRX | A | 70,000 | — | — | 70,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 20, 2025 | AKTX | A | 225,000 | — | — | 225,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 20, 2025 | AKTX | A | 175,000 | — | — | 175,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 6, 2025 | AKTX | A | 892,857 | $1.12 | $1,000,000 | 892,857 Direct | — | Acquired | -82.3% (price as of 2026-08-21) |
| March 6, 2025 | AKTX | A | 892,857 | $1.12 | $1,000,000 | 892,857 Direct | — | Acquired | -82.3% (price as of 2026-08-21) |
| March 6, 2025 | AKTX | A | 892,857 | $1.12 | $1,000,000 | 4,695,854 Direct | +23.48% | Acquired | -82.3% (price as of 2026-08-21) |
| June 7, 2023 | PLRX | A | 14,000 | — | — | 14,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 29, 2021 | PLRX | A | 13,286 | — | — | 13,286 Direct | — | Acquired | (price as of 2026-08-21) |
| June 5, 2020 | PLRX | C | 1,000,000 | — | — | 0 Indirect | — | Acquired | (price as of 2026-08-21) |
| June 5, 2020 | PLRX | C | 139,860 | — | — | 239,619 Indirect | +140.20% | Acquired | (price as of 2026-08-21) |
| June 13, 2018 | CTMX | A | 14,000 | — | — | 14,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 15, 2018 | GERN | A | 70,000 | — | — | 70,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Dec. 29, 2017 | GERN | A | 10,764 | — | — | 154,301 Direct | +7.50% | Acquired | (price as of 2026-08-21) |
| Sept. 29, 2017 | GERN | A | 8,888 | — | — | 143,537 Direct | +6.60% | Acquired | (price as of 2026-08-21) |
| June 30, 2017 | GERN | A | 6,995 | — | — | 134,649 Direct | +5.48% | Acquired | (price as of 2026-08-21) |
| June 20, 2017 | CTMX | A | 14,000 | — | — | 14,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 9, 2017 | GERN | A | 50,000 | — | — | 50,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 31, 2017 | GERN | A | 8,535 | — | — | 127,654 Direct | +7.17% | Acquired | (price as of 2026-08-21) |
| Oct. 31, 2016 | RZLT | A | 4,000,000 | — | — | 4,000,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 10, 2016 | CTMX | A | 28,000 | — | — | 28,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 17, 2016 | GERN | A | 50,000 | — | — | 50,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 31, 2016 | RZLT | J | 234,700 | — | — | 234,700 Indirect | — | Acquired | (price as of 2026-08-21) |
| May 18, 2015 | GERN | A | 35,000 | — | — | 35,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 30, 2014 | GERN | D | 10,000 | — | — | 119,119 Direct | -7.74% | Disposed | (price as of 2026-08-21) |
| May 20, 2014 | GERN | A | 35,000 | — | — | 35,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 31, 2014 | RZLT | A | 1,057,693 | $275000.00 | $290,865,575,000 | 5,057,693 Indirect | +26.44% | Acquired | -100.0% (price as of 2026-08-21) |
| March 31, 2014 | GERN | A | 9,270 | — | — | 129,119 Direct | +7.73% | Acquired | (price as of 2026-08-21) |
| Dec. 31, 2013 | GERN | A | 4,088 | — | — | 119,849 Direct | +3.53% | Acquired | (price as of 2026-08-21) |
| Sept. 30, 2013 | GERN | A | 5,784 | — | — | 115,761 Direct | +5.26% | Acquired | (price as of 2026-08-21) |
| July 9, 2013 | GERN | D | 45,000 | — | — | 109,977 Direct | -29.04% | Disposed | (price as of 2026-08-21) |
| June 28, 2013 | GERN | A | 12,450 | — | — | 154,977 Direct | +8.74% | Acquired | (price as of 2026-08-21) |
| May 22, 2013 | GERN | A | 35,000 | — | — | 35,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Dec. 31, 2012 | GERN | D | 10,000 | — | — | 142,527 Direct | -6.56% | Disposed | (price as of 2026-08-21) |
| May 17, 2012 | GERN | A | 35,000 | — | — | 35,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 17, 2012 | GERN | A | 21,277 | — | — | 152,527 Direct | +16.21% | Acquired | (price as of 2026-08-21) |
| April 30, 2012 | RZLT | A | 350,000 | — | — | 2,850,000 Direct | +14.00% | Acquired | (price as of 2026-08-21) |
| May 20, 2011 | GERN | A | 57,500 | — | — | 57,500 Direct | — | Acquired | (price as of 2026-08-21) |
| May 20, 2011 | GERN | A | 15,000 | — | — | 15,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 20, 2011 | GERN | A | 10,000 | — | — | 131,250 Direct | +8.25% | Acquired | (price as of 2026-08-21) |
| May 20, 2011 | GERN | A | 10,000 | — | — | 121,250 Direct | +8.99% | Acquired | (price as of 2026-08-21) |
| May 20, 2011 | GERN | A | 28,750 | — | — | 111,250 Direct | +34.85% | Acquired | (price as of 2026-08-21) |
| March 9, 2011 | GERN | A | 75,000 | — | — | 75,000 Direct | — | Acquired | (price as of 2026-08-21) |
| March 9, 2011 | GERN | A | 37,500 | — | — | 82,500 Direct | +83.33% | Acquired | (price as of 2026-08-21) |
| July 9, 2010 | GERN | A | 18,000 | — | — | 45,000 Direct | +66.67% | Acquired | (price as of 2026-08-21) |
| July 9, 2010 | GERN | A | 9,000 | — | — | 27,000 Direct | +50.00% | Acquired | (price as of 2026-08-21) |
| July 9, 2010 | GERN | A | 9,000 | — | — | 18,000 Direct | +100.00% | Acquired | (price as of 2026-08-21) |
| July 9, 2010 | GERN | A | 9,000 | — | — | 9,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Dec. 2, 2008 | NKTR | A | 5,000 | $0.01 | $50 | 5,000 Direct | — | Acquired | 49986.9% (price as of 2026-08-21) |
| Dec. 2, 2008 | NKTR | A | 15,000 | $5.15 | $77,250 | 15,000 Direct | — | Acquired | -2.7% (price as of 2026-08-21) |
| March 20, 2008 | NKTR | A | 37,500 | $6.65 | $249,375 | 37,500 Direct | — | Acquired | -24.7% (price as of 2026-08-21) |
| March 3, 2008 | NKTR | A | 2,900 | $0.01 | $29 | 2,900 Direct | — | Acquired | 49986.9% (price as of 2026-08-21) |
| March 3, 2008 | NKTR | A | 8,750 | $6.95 | $60,812 | 8,750 Direct | — | Acquired | -27.9% (price as of 2026-08-21) |
| March 3, 2008 | NKTR | A | 2,900 | $0.01 | $29 | 2,900 Direct | — | Acquired | 49986.9% (price as of 2026-08-21) |
| March 3, 2008 | NKTR | A | 8,700 | $6.95 | $60,465 | 8,700 Direct | — | Acquired | -27.9% (price as of 2026-08-21) |
| Dec. 21, 2007 | NKTR | A | 250,000 | — | — | 250,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 6, 2007 | NKTR | A | 100,000 | $10.84 | $1,084,000 | 252,000 Direct | +65.79% | Acquired | -53.8% (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 |
|---|---|---|---|---|---|---|---|
| June 11, 2026 | PLRX | Stock Option (Right to Buy) | Common Stock (70,000) | $1.14 | June 11, 2036 | 70,000 | Acquired |
| March 20, 2025 | AKTX | Stock Option (Right to Buy) | American Depositary Shares representing Ordinary Shares [F1] (225,000) | $1.50 | March 20, 2035 | 225,000 | Acquired |
| March 20, 2025 | AKTX | Stock Option (Right to Buy) | American Depositary Shares representing Ordinary Shares [F1] (175,000) | $1.50 | March 20, 2035 | 175,000 | Acquired |
| March 6, 2025 | AKTX | Series B Warrants (Right to Buy) | American Depositary Shares representing Ordinary Shares [F1] (892,857) | $0.87 | March 6, 2030 | 892,857 | Acquired |
| March 6, 2025 | AKTX | Series A Warrants (Right to Buy) | American Depositary Shares representing Ordinary Shares [F1] (892,857) | $0.87 | March 6, 2026 | 892,857 | Acquired |
| June 7, 2023 | PLRX | Stock Option (Right to Buy) | Common Stock (14,000) | $23.09 | June 7, 2033 | 14,000 | Acquired |
| June 29, 2021 | PLRX | Stock Option (right to buy) | Common Stock (13,286) | $28.20 | June 28, 2031 | 13,286 | Acquired |
| June 5, 2020 | PLRX | Series A Preferred Stock | Common Stock (139,860) | — | — | 1,000,000 | Acquired |
| June 13, 2018 | CTMX | Stock Option (Right to Buy) | Common Stock (14,000) | $25.25 | June 12, 2028 | 14,000 | Acquired |
| May 15, 2018 | GERN | Stock Option (right to buy) | Common Stock (70,000) | $3.43 | May 14, 2028 | 70,000 | Acquired |
| June 20, 2017 | CTMX | Stock Option (right to buy) | Common Stock (14,000) | $13.78 | June 19, 2027 | 14,000 | Acquired |
| May 9, 2017 | GERN | Stock Option (right to buy) | Common Stock (50,000) | $2.63 | May 9, 2027 | 50,000 | Acquired |
| Oct. 31, 2016 | RZLT | Stock Option (right to buy) | Common Stock | $1.20 | Oct. 31, 2026 | 4,000,000 | Acquired |
| June 10, 2016 | CTMX | Stock Option (right to buy) | Common Stock (28,000) | $10.17 | June 9, 2026 | 28,000 | Acquired |
| May 17, 2016 | GERN | Stock Option (right to buy) | Common Stock (50,000) | $2.74 | May 17, 2026 | 50,000 | Acquired |
| March 31, 2016 | RZLT | Warrant to purchase common stock | Common Stock (234,700) | $1.25 | March 31, 2019 | 234,700 | Acquired |
| May 18, 2015 | GERN | Stock Option (right to buy) | Common Stock (35,000) | $3.88 | May 18, 2025 | 35,000 | Acquired |
| May 20, 2014 | GERN | Stock Option (right to buy) | Common Stock (35,000) | $1.94 | May 20, 2024 | 35,000 | Acquired |
| May 22, 2013 | GERN | Stock Option (right to buy) | Common Stock (35,000) | $1.10 | May 22, 2023 | 35,000 | Acquired |
| May 17, 2012 | GERN | Stock Option (right to buy) | Common Stock (35,000) | $1.41 | May 17, 2022 | 35,000 | Acquired |
| April 30, 2012 | RZLT | Stock Option (right to buy) | Common Stock (350,000) | $3.12 | April 30, 2019 | 350,000 | Acquired |
| May 20, 2011 | GERN | Employee Stock Option (right to buy) | Common Stock (57,500) | $4.65 | May 20, 2021 | 57,500 | Acquired |
| May 20, 2011 | GERN | Employee Stock Option (right to buy) | Common Stock (15,000) | $4.65 | May 20, 2021 | 15,000 | Acquired |
| March 9, 2011 | GERN | Stock Option (right to buy) | Common Stock (75,000) | $5.00 | March 9, 2021 | 75,000 | Acquired |
| Dec. 2, 2008 | NKTR | Restricted Stock Unit [F1] | Common Stock (5,000) | $0.01 | — | 5,000 | Acquired |
| Dec. 2, 2008 | NKTR | Stock Option [F1] | Common Stock (15,000) | $5.15 | Dec. 2, 2016 | 15,000 | Acquired |
| March 20, 2008 | NKTR | Stock Option [F1] | Common Stock (37,500) | $6.65 | March 20, 2016 | 37,500 | Acquired |
| March 3, 2008 | NKTR | Restricted Stock Units | Common Stock (2,900) | $0.01 | — | 2,900 | Acquired |
| March 3, 2008 | NKTR | Stock Option [F1] | Common Stock (8,750) | $6.95 | March 3, 2016 | 8,750 | Acquired |
| March 3, 2008 | NKTR | Restricted Stock Units | Common Stock (2,900) | $0.01 | — | 2,900 | Acquired |
| March 3, 2008 | NKTR | Stock Option | Common Stock (8,700) | $6.95 | March 3, 2016 | 8,700 | Acquired |
| Dec. 21, 2007 | NKTR | Employee Stock Option | Common Stock (250,000) | $6.98 | Dec. 21, 2015 | 250,000 | Acquired |
| June 6, 2007 | NKTR | Stock Option (Right to Buy) | Common Stock (100,000) | $10.84 | June 6, 2015 | 100,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 18 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 22, 2024 | AKTX | Ordinary Shares, par value $0.0001 per share [F1] | 7,605,994,000 | Direct |
| Nov. 22, 2024 | AKTX | Ordinary Shares, par value $0.0001 per share [F1] | 218,914,000 | Indirect |
| Nov. 22, 2024 | AKTX | Warrants (Right to Buy)→ Ordinary Shares, par value $0.0001 per share [F1] (103,482,000) | 103,482,000 | Direct |
| Nov. 22, 2024 | AKTX | Stock Option (Right to Buy)→ Ordinary Shares, par value $0.0001 per share [F1] (704,400,000) | 704,400,000 | Direct |
| June 2, 2020 | PLRX | Common Stock | 99,759 | Indirect |
| June 2, 2020 | PLRX | Series A Preferred Stock→ Common Stock (139,860) | 139,860 | Indirect |
| Oct. 7, 2015 | CTMX | Stock Option (right to buy)→ Common Stock (7,941) | 7,941 | Direct |
| Oct. 7, 2015 | CTMX | Stock Option (right to buy)→ Common Stock (95,301) | 95,301 | Direct |
| Oct. 7, 2015 | CTMX | Stock Option (right to buy)→ Common Stock (146,325) | 146,325 | Direct |
| Oct. 7, 2015 | CTMX | Stock Option (right to buy)→ Common Stock (110,426) | 110,426 | Direct |
| Feb. 8, 2013 | RZLT | Common Stock | 4,000,000 | Indirect |
| Feb. 8, 2013 | RZLT | Option to Purchase Common Stock→ Common Stock (2,500,000) | 2,500,000 | Direct |
| May 21, 2010 | GERN | Stock Option (right to buy)→ Common Stock (45,000) | 45,000 | Direct |
| May 29, 2007 | NKTR | Common Stock | 8,000 | Direct |
| May 29, 2007 | NKTR | Stock Option (Right to Buy)→ Common Stock (90,000) | 90,000 | Direct |
| May 29, 2007 | NKTR | Restricted Stock Unit→ Common Stock (12,000) | 12,000 | Direct |
| May 29, 2007 | NKTR | Stock Option (Right to Buy)→ Common Stock (10,000) | 10,000 | Direct |
| May 29, 2007 | NKTR | Stock Option (Right to Buy)→ Common Stock (40,000) | 40,000 | Direct |