Chong Sup Park
CIK 1216771 · View on SEC EDGAR ↗
Insider
First SEC filing: Aug. 15, 2011 · Latest: March 29, 2012
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Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 73 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
73 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Jan. 30, 2018 | STX | S | 4,026 | $54.22 | $218,290 | 18,632 Indirect | -17.77% | Disposed | 1484.2% (price as of 2026-08-21) |
| May 16, 2017 | STX | S | 3,809 | $43.63 | $166,187 | 25,658 Indirect | -12.93% | Disposed | 1868.7% (price as of 2026-08-21) |
| Feb. 1, 2017 | STX | S | 1,618 | $44.63 | $72,211 | 29,467 Indirect | -5.21% | Disposed | 1824.6% (price as of 2026-08-21) |
| Oct. 31, 2014 | STX | S | 1,250 | $62.57 | $78,212 | 32,125 Indirect | -3.75% | Disposed | 1272.8% (price as of 2026-08-21) |
| Aug. 21, 2014 | STX | S | 3,000 | $60.07 | $180,210 | 29,566 Indirect | -9.21% | Disposed | 1329.9% (price as of 2026-08-21) |
| Aug. 21, 2014 | STX | S | 1,251 | $59.90 | $74,935 | 5,952 Direct | -17.37% | Disposed | 1333.9% (price as of 2026-08-21) |
| Jan. 30, 2014 | STX | S | 2,270 | $53.54 | $121,536 | 32,566 Indirect | -6.52% | Disposed | 1504.3% (price as of 2026-08-21) |
| Nov. 1, 2013 | STX | S | 3,000 | $49.17 | $147,510 | 34,836 Indirect | -7.93% | Disposed | 1646.9% (price as of 2026-08-21) |
| May 6, 2013 | STX | S 10b5-1 | 1,666 | $41.95 | $69,889 | 19,103 Direct | -8.02% | Disposed | 1947.5% (price as of 2026-08-21) |
| May 6, 2013 | STX | S 10b5-1 | 5,000 | $41.95 | $209,750 | 21,698 Indirect | -18.73% | Disposed | 1947.5% (price as of 2026-08-21) |
| May 2, 2013 | STX | S 10b5-1 | 7,709 | $38.05 | $293,327 | 19,103 Direct | -28.75% | Disposed | 2157.4% (price as of 2026-08-21) |
| Jan. 22, 2013 | STX | S 10b5-1 | 9,374 | $37.00 | $346,838 | 19,103 Direct | -32.92% | Disposed | 2221.4% (price as of 2026-08-21) |
| Jan. 22, 2013 | STX | S 10b5-1 | 10,000 | $36.00 | $360,000 | 28,477 Direct | -25.99% | Disposed | 2285.9% (price as of 2026-08-21) |
| Oct. 24, 2012 | STX | S 10b5-1 | 6,100 | $27.61 | $168,421 | 20,353 Direct | -23.06% | Disposed | 3010.9% (price as of 2026-08-21) |
| Aug. 22, 2012 | STX | S 10b5-1 | 28,700 | $34.53 | $991,011 | 19,468 Direct | -59.58% | Disposed | 2387.5% (price as of 2026-08-21) |
| Nov. 11, 2011 | STX | S | 5,600 | $17.66 | $98,896 | 20,448 Indirect | -21.50% | Disposed | 4763.7% (price as of 2026-08-21) |
| Jan. 21, 2010 | STX | S 10b5-1 | 2,313 | $20.00 | $46,260 | 11,250 Direct | -17.05% | Disposed | 4194.7% (price as of 2026-08-21) |
| Jan. 5, 2010 | STX | S 10b5-1 | 12,500 | $19.00 | $237,500 | 11,250 Direct | -52.63% | Disposed | 4420.7% (price as of 2026-08-21) |
| Dec. 23, 2009 | STX | S 10b5-1 | 3,700 | $18.00 | $66,600 | 11,250 Direct | -24.75% | Disposed | 4671.8% (price as of 2026-08-21) |
| Dec. 23, 2009 | STX | S 10b5-1 | 15,000 | $18.00 | $270,000 | 11,250 Direct | -57.14% | Disposed | 4671.8% (price as of 2026-08-21) |
| Nov. 12, 2009 | STX | S 10b5-1 | 16,650 | $17.00 | $283,050 | 11,250 Direct | -59.68% | Disposed | 4952.5% (price as of 2026-08-21) |
| Nov. 12, 2009 | STX | S 10b5-1 | 15,000 | $17.00 | $255,000 | 11,250 Direct | -57.14% | Disposed | 4952.5% (price as of 2026-08-21) |
| Sept. 9, 2009 | STX | S 10b5-1 | 10,000 | $15.00 | $150,000 | 8,750 Direct | -53.33% | Disposed | 5626.2% (price as of 2026-08-21) |
| Sept. 8, 2009 | STX | S 10b5-1 | 15,000 | $16.10 | $241,500 | 8,750 Direct | -63.16% | Disposed | 5235.0% (price as of 2026-08-21) |
| Sept. 8, 2009 | STX | S 10b5-1 | 10,000 | $14.00 | $140,000 | 8,750 Direct | -53.33% | Disposed | 6035.2% (price as of 2026-08-21) |
| Nov. 2, 2007 | STX | S 10b5-1 | 25,000 | $28.48 | $712,000 | 6,850 Direct | -78.49% | Disposed | 2915.9% (price as of 2026-08-21) |
| Oct. 10, 2007 | STX | S 10b5-1 | 25,000 | $27.00 | $675,000 | 1,850 Direct | -93.11% | Disposed | 3081.2% (price as of 2026-08-21) |
Showing latest 100 of 136 transactions
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 |
|---|---|---|---|---|---|---|---|
| Oct. 18, 2018 | STX | Restricted Share Unit | Ordinary Shares (8,094) | $0.00 | — | 8,094 | Disposed |
| Oct. 18, 2017 | STX | Restricted Share Unit | Ordinary Shares (8,094) | $0.00 | — | 8,094 | Acquired |
| Aug. 21, 2014 | STX | NQ Stock Options | Ordinary Shares (1,251) | $14.82 | Oct. 28, 2016 | 1,251 | Disposed |
| May 6, 2013 | STX | NQ Stock Options | Ordinary Shares (1,666) | $14.82 | Oct. 30, 2016 | 1,666 | Disposed |
| May 2, 2013 | STX | NQ Stock Options | Ordinary Shares (626) | $6.52 | Oct. 30, 2015 | 626 | Disposed |
| May 2, 2013 | STX | NQ Stock Options | Ordinary Shares (7,083) | $14.82 | Oct. 30, 2016 | 7,083 | Disposed |
| May 2, 2013 | ENPH | Stock Option (Right to Buy) [F1] | Common Stock (27,428) | $7.50 | May 1, 2020 | 27,428 | Acquired |
| Jan. 22, 2013 | STX | NQ Stock Options | Ordinary Shares (9,374) | $6.52 | Oct. 30, 2015 | 9,374 | Disposed |
| Jan. 22, 2013 | STX | NQ Stock Options | Ordinary Shares (10,000) | $26.46 | Oct. 25, 2014 | 10,000 | Disposed |
| Dec. 20, 2012 | AZTA | Restricted Stock Units | Common Stock (7,500) | — | — | 7,500 | Disposed |
| Aug. 22, 2012 | STX | NQ Stock Options | Ordinary Shares (3,700) | $26.62 | Feb. 9, 2014 | 3,700 | Disposed |
| Aug. 22, 2012 | STX | NQ Stock Options | Ordinary Shares (25,000) | $24.70 | May 19, 2013 | 25,000 | Disposed |
| May 11, 2012 | ENPH | Stock Option (Right to Buy) [F1] | Common Stock (24,691) | $8.43 | May 10, 2022 | 24,691 | Acquired |
| Jan. 21, 2010 | STX | NQ Stock Option | Common Shares (2,313) | $17.89 | Feb. 7, 2012 | 2,313 | Disposed |
| Jan. 5, 2010 | STX | NQ Stock Option | Common Shares (12,500) | $10.14 | Nov. 14, 2014 | 12,500 | Disposed |
| Dec. 23, 2009 | STX | NQ Stock Option | Common Shares (3,700) | $14.59 | Feb. 7, 2013 | 3,700 | Disposed |
| Dec. 23, 2009 | STX | NQ Stock Option | Common Shares (15,000) | $10.14 | Nov. 14, 2014 | 15,000 | Disposed |
| Nov. 12, 2009 | STX | NQ Stock Option | Common Shares (16,650) | $13.57 | Jan. 2, 2013 | 16,650 | Disposed |
| Nov. 12, 2009 | STX | NQ Stock Option | Common Shares (15,000) | $10.14 | Nov. 14, 2014 | 15,000 | Disposed |
| Oct. 28, 2009 | STX | NQ Stock Option | Common Shares (10,000) | $14.82 | Oct. 28, 2016 | 10,000 | Acquired |
| Sept. 23, 2009 | STX | NQ Stock Option | Common Shares (15,000) | $10.14 | Nov. 14, 2014 | 15,000 | Disposed |
| Sept. 9, 2009 | STX | NQ Stock Option | Common Shares (10,000) | $10.14 | Nov. 14, 2014 | 10,000 | Disposed |
| Sept. 8, 2009 | STX | NQ Stock Option | Common Shares (10,000) | $10.14 | Nov. 14, 2014 | 10,000 | Disposed |
| Feb. 11, 2009 | AZTA | Restricted Stock Units | Common Stock (7,500) | — | — | 7,500 | Acquired |
| Oct. 30, 2008 | STX | NQ Stock Option | Common Shares (10,000) | $6.52 | Oct. 30, 2015 | 10,000 | Acquired |
| Nov. 2, 2007 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Oct. 25, 2007 | STX | NQ Stock Option | Common Shares (10,000) | $26.46 | Oct. 25, 2014 | 10,000 | Acquired |
| Oct. 10, 2007 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Sept. 4, 2007 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Aug. 31, 2007 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Jan. 24, 2007 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Nov. 20, 2006 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Nov. 15, 2006 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| Aug. 30, 2006 | STX | NQ Stock Option | Common Shares (25,000) | $10.14 | Nov. 14, 2014 | 25,000 | Disposed |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (277,500) | $10.14 | Nov. 14, 2014 | 277,500 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (3,700) | $26.62 | Feb. 9, 2014 | 3,700 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (3,700) | $14.59 | Feb. 7, 2013 | 3,700 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (16,650) | $13.57 | Jan. 2, 2013 | 16,650 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (2,312) | $17.89 | Feb. 7, 2012 | 2,312 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (3,700) | $22.11 | May 2, 2011 | 3,700 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (7,400) | $21.11 | Jan. 11, 2010 | 7,400 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (3,700) | $32.26 | Feb. 18, 2009 | 3,700 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (3,700) | $35.64 | Nov. 11, 2008 | 3,700 | Acquired |
| May 19, 2006 | STX | NQ Stock Option | Common Shares (25,000) | $24.70 | May 19, 2013 | 25,000 | 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 |
|---|---|---|---|---|
| March 29, 2012 | ENPH | Stock Option (Right to Buy)→ Common Stock | — | Direct |