Yoon Michael Chung
Insider
First SEC filing: April 23, 2018 · Latest: April 23, 2018
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 20, 2018 | PH | A | 5,583 | · | · | 22,048 Direct | +33.91% | Acquired | (price as of 2026-10-06) |
| Nov. 17, 2017 | PH | S | 3,950 | $182.15 | $719,492 | 16,465 Direct | -19.35% | Disposed | 444.3% (price as of 2026-10-06) |
| Nov. 17, 2017 | PH | M | 7,850 | · | · | 7,850 Direct | · | Acquired | (price as of 2026-10-06) |
| Nov. 17, 2017 | PH | S | 2,485 | $182.00 | $452,270 | 20,415 Direct | -10.85% | Disposed | 444.8% (price as of 2026-10-06) |
| Nov. 17, 2017 | PH | F | 5,365 | $182.00 | $976,430 | 22,900 Direct | -18.98% | Disposed | 444.8% (price as of 2026-10-06) |
| Nov. 17, 2017 | PH | M | 7,850 | $69.10 | $542,435 | 28,265 Direct | +38.45% | Acquired | 1334.8% (price as of 2026-10-06) |
| Aug. 16, 2017 | PH | A | 7,840 | · | · | 7,840 Direct | · | Acquired | (price as of 2026-10-06) |
| April 21, 2017 | PH | F | 1,399 | $157.07 | $219,741 | 20,415 Direct | -6.41% | Disposed | 531.2% (price as of 2026-10-06) |
| April 21, 2017 | PH | A | 4,255 | · | · | 21,814 Direct | +24.23% | Acquired | (price as of 2026-10-06) |
| April 20, 2017 | PH | F | 1,723 | $176.18 | $303,558 | 20,325 Direct | -7.81% | Disposed | 462.8% (price as of 2026-10-06) |
| March 2, 2017 | PH | M | 5,779 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| March 2, 2017 | PH | S | 657 | $158.40 | $104,069 | 17,559 Direct | -3.61% | Disposed | 525.9% (price as of 2026-10-06) |
| March 2, 2017 | PH | F | 5,122 | $158.35 | $811,069 | 18,216 Direct | -21.95% | Disposed | 526.1% (price as of 2026-10-06) |
| March 2, 2017 | PH | M | 5,779 | $131.69 | $761,037 | 23,338 Direct | +32.91% | Acquired | 652.9% (price as of 2026-10-06) |
| Nov. 10, 2016 | PH | M | 7,107 | $100.01 | $710,771 | 24,666 Direct | +40.47% | Acquired | 891.4% (price as of 2026-10-06) |
| Nov. 10, 2016 | PH | M | 11,140 | $62.35 | $694,579 | 35,806 Direct | +45.16% | Acquired | 1490.2% (price as of 2026-10-06) |
| Nov. 10, 2016 | PH | F | 13,819 | $136.70 | $1,889,057 | 21,987 Direct | -38.59% | Disposed | 625.3% (price as of 2026-10-06) |
| Nov. 10, 2016 | PH | S | 4,428 | $136.66 | $605,130 | 17,559 Direct | -20.14% | Disposed | 625.5% (price as of 2026-10-06) |
| Nov. 10, 2016 | PH | M | 7,107 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Nov. 10, 2016 | PH | M | 11,140 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Aug. 17, 2016 | PH | A | 9,910 | · | · | 9,910 Direct | · | Acquired | (price as of 2026-10-06) |
| April 22, 2016 | PH | F | 975 | $113.90 | $111,052 | 17,559 Direct | -5.26% | Disposed | 770.5% (price as of 2026-10-06) |
| April 22, 2016 | PH | A | 2,967 | · | · | 18,534 Direct | +19.06% | Acquired | (price as of 2026-10-06) |
| Aug. 12, 2015 | PH | A | 8,680 | · | · | 8,680 Direct | · | Acquired | (price as of 2026-10-06) |
| April 30, 2015 | PH | F | 1,072 | $119.06 | $127,632 | 15,567 Direct | -6.44% | Disposed | 732.7% (price as of 2026-10-06) |
| April 30, 2015 | PH | A | 3,260 | · | · | 16,639 Direct | +24.37% | Acquired | (price as of 2026-10-06) |
| Nov. 26, 2014 | PH | A | 5,779 | · | · | 5,779 Direct | · | Acquired | (price as of 2026-10-06) |
| Nov. 26, 2014 | PH | M | 11,700 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Nov. 26, 2014 | PH | S | 3,888 | $132.28 | $514,305 | 13,379 Direct | -22.52% | Disposed | 649.5% (price as of 2026-10-06) |
| Nov. 26, 2014 | PH | F | 8,589 | $132.30 | $1,136,325 | 17,267 Direct | -33.22% | Disposed | 649.4% (price as of 2026-10-06) |
| Nov. 26, 2014 | PH | M | 11,700 | $65.34 | $764,478 | 25,856 Direct | +82.65% | Acquired | 1417.4% (price as of 2026-10-06) |
| Aug. 17, 2014 | PH | F | 2,228 | $113.06 | $251,898 | 14,156 Direct | -13.60% | Disposed | 776.9% (price as of 2026-10-06) |
| Aug. 13, 2014 | PH | A | 9,040 | · | · | 9,040 Direct | · | Acquired | (price as of 2026-10-06) |
| May 5, 2014 | PH | S | 3,100 | $124.89 | $387,159 | 16,384 Direct | -15.91% | Disposed | 693.9% (price as of 2026-10-06) |
| April 30, 2014 | PH | F | 1,519 | $126.16 | $191,637 | 19,484 Direct | -7.23% | Disposed | 685.9% (price as of 2026-10-06) |
| April 30, 2014 | PH | A | 4,619 | · | · | 21,003 Direct | +28.19% | Acquired | (price as of 2026-10-06) |
| Dec. 6, 2013 | PH | M | 8,235 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 6, 2013 | PH | S | 2,132 | $120.18 | $256,224 | 16,384 Direct | -11.51% | Disposed | 725.0% (price as of 2026-10-06) |
| Dec. 6, 2013 | PH | F | 6,103 | $120.11 | $733,031 | 18,516 Direct | -24.79% | Disposed | 725.5% (price as of 2026-10-06) |
| Dec. 6, 2013 | PH | M | 8,235 | $60.93 | $501,759 | 24,619 Direct | +50.26% | Acquired | 1527.2% (price as of 2026-10-06) |
| Sept. 12, 2013 | PH | S | 4,800 | $104.43 | $501,264 | 16,384 Direct | -22.66% | Disposed | 849.4% (price as of 2026-10-06) |
| Aug. 14, 2013 | PH | A | 12,000 | · | · | 12,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 11, 2013 | PH | F | 1,344 | $103.66 | $139,319 | 21,184 Direct | -5.97% | Disposed | 856.5% (price as of 2026-10-06) |
| May 17, 2013 | PH | A | 7,107 | · | · | 7,107 Direct | · | Acquired | (price as of 2026-10-06) |
| May 17, 2013 | PH | M | 14,295 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| May 17, 2013 | PH | F | 10,407 | $99.49 | $1,035,392 | 22,528 Direct | -31.60% | Disposed | 896.5% (price as of 2026-10-06) |
| May 17, 2013 | PH | M | 14,295 | $49.46 | $707,031 | 32,935 Direct | +76.69% | Acquired | 1904.6% (price as of 2026-10-06) |
| April 17, 2013 | PH | F | 1,615 | $87.01 | $140,521 | 18,640 Direct | -7.97% | Disposed | 1039.5% (price as of 2026-10-06) |
| April 17, 2013 | PH | A | 4,912 | · | · | 20,255 Direct | +32.01% | Acquired | (price as of 2026-10-06) |
| Jan. 28, 2013 | PH | M | 8,100 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Jan. 28, 2013 | PH | S | 2,536 | $93.78 | $237,826 | 15,343 Direct | -14.18% | Disposed | 957.2% (price as of 2026-10-06) |
| Jan. 28, 2013 | PH | F | 5,564 | $93.78 | $521,792 | 17,879 Direct | -23.73% | Disposed | 957.2% (price as of 2026-10-06) |
| Jan. 28, 2013 | PH | M | 8,100 | $49.75 | $402,975 | 23,443 Direct | +52.79% | Acquired | 1892.9% (price as of 2026-10-06) |
| Aug. 15, 2012 | PH | A | 9,750 | · | · | 9,750 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 15, 2012 | PH | F | 3,916 | $81.55 | $319,350 | 15,343 Direct | -20.33% | Disposed | 1115.8% (price as of 2026-10-06) |
| Aug. 15, 2012 | PH | A | 10,924 | · | · | 19,259 Direct | +131.06% | Acquired | (price as of 2026-10-06) |
| Aug. 12, 2012 | PH | F | 222 | $82.70 | $18,359 | 8,335 Direct | -2.59% | Disposed | 1098.9% (price as of 2026-10-06) |
| Aug. 17, 2011 | PH | A | 7,850 | · | · | 7,850 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 17, 2011 | PH | A | 4,722 | · | · | 8,557 Direct | +123.13% | Acquired | (price as of 2026-10-06) |
| Aug. 13, 2011 | PH | F | 166 | $68.44 | $11,361 | 3,835 Direct | -4.15% | Disposed | 1348.7% (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | M | 7,800 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | S | 400 | $85.43 | $34,172 | 4,001 Direct | -9.09% | Disposed | 1060.6% (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | S | 882 | $85.42 | $75,340 | 4,401 Direct | -16.70% | Disposed | 1060.7% (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | S | 1,007 | $85.41 | $86,008 | 5,283 Direct | -16.01% | Disposed | 1060.8% (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | F | 1,514 | $85.41 | $129,311 | 6,290 Direct | -19.40% | Disposed | 1060.8% (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | D | 3,997 | $85.41 | $341,384 | 7,804 Direct | -33.87% | Disposed | 1060.8% (price as of 2026-10-06) |
| Dec. 10, 2010 | PH | M | 7,800 | $43.77 | $341,406 | 11,801 Direct | +194.95% | Acquired | 2165.2% (price as of 2026-10-06) |
| Nov. 18, 2010 | PH | M | 6,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Nov. 18, 2010 | PH | S | 1,500 | $80.40 | $120,600 | 4,001 Direct | -27.27% | Disposed | 1133.2% (price as of 2026-10-06) |
| Nov. 18, 2010 | PH | S | 586 | $80.43 | $47,132 | 5,501 Direct | -9.63% | Disposed | 1132.7% (price as of 2026-10-06) |
| Nov. 18, 2010 | PH | F | 3,914 | $80.43 | $314,803 | 6,087 Direct | -39.14% | Disposed | 1132.7% (price as of 2026-10-06) |
| Nov. 18, 2010 | PH | M | 6,000 | $36.26 | $217,560 | 10,001 Direct | +149.96% | Acquired | 2634.3% (price as of 2026-10-06) |
| Aug. 11, 2010 | PH | A | 11,140 | · | · | 11,140 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 11, 2010 | PH | A | 2,832 | · | · | 4,001 Direct | +242.26% | Acquired | (price as of 2026-10-06) |
| Aug. 12, 2009 | PH | A | 14,295 | · | · | 14,295 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 12, 2009 | PH | A | 717 | · | · | 1,169 Direct | +158.63% | Acquired | (price as of 2026-10-06) |
| Aug. 13, 2008 | PH | A | 11,700 | · | · | 11,700 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 13, 2008 | PH | A | 448 | · | · | 452 Direct | +11200.00% | Acquired | (price as of 2026-10-06) |
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. 17, 2017 | PH | Common Stock | Common Stock | $69.10 | Aug. 16, 2021 | 7,850 | Acquired |
| Aug. 16, 2017 | PH | Stock Appreciation Right | Common Stock | $158.79 | Aug. 15, 2027 | 7,840 | Acquired |
| March 2, 2017 | PH | Stock Appreciation Right | Common Stock | $131.69 | Aug. 12, 2018 | 5,779 | Disposed |
| Nov. 10, 2016 | PH | Stock Appreciation Right | Common Stock | $100.01 | Aug. 11, 2019 | 7,107 | Disposed |
| Nov. 10, 2016 | PH | Stock Appreciation Right | Common Stock | $62.35 | Aug. 10, 2020 | 11,140 | Disposed |
| Aug. 17, 2016 | PH | Stock Appreciation Right | Common Stock | $124.36 | Aug. 16, 2026 | 9,910 | Acquired |
| Aug. 12, 2015 | PH | Stock Appreciation Right | Common Stock | $113.23 | Aug. 11, 2025 | 8,680 | Acquired |
| Nov. 26, 2014 | PH | Stock Appreciation Right | Common Stock | $131.69 | Aug. 12, 2018 | 5,779 | Acquired |
| Nov. 26, 2014 | PH | Option to Buy with Tandem Stock Appreciation Right | Common Stock | $65.34 | Aug. 12, 2018 | 11,700 | Disposed |
| Aug. 13, 2014 | PH | Stock Appreciation Right | Common Stock | $113.19 | Aug. 12, 2024 | 9,040 | Acquired |
| Dec. 6, 2013 | PH | Stock Appreciation Right | Common Stock | $60.93 | Aug. 14, 2017 | 8,235 | Acquired |
| Aug. 14, 2013 | PH | Stock Appreciation Right | Common Stock | $106.18 | Aug. 13, 2023 | 12,000 | Acquired |
| May 17, 2013 | PH | Stock Appreciation Right | Common Stock | $100.01 | Aug. 11, 2019 | 7,107 | Acquired |
| May 17, 2013 | PH | Option to Buy with Tandem Stock Appreciation Right | Common Stock | $49.46 | Aug. 11, 2019 | 14,295 | Disposed |
| Jan. 28, 2013 | PH | Stock Appreciation Right | Common Stock | $49.75 | Aug. 15, 2016 | 8,100 | Disposed |
| Aug. 15, 2012 | PH | Stock Appreciation Right | Common Stock | $81.86 | Aug. 14, 2022 | 9,750 | Acquired |
| Aug. 17, 2011 | PH | Stock Appreciation Right | Common Stock | $69.10 | Aug. 16, 2021 | 7,850 | Acquired |
| Dec. 10, 2010 | PH | Stock Appreciation Right | Common Stock | $43.77 | Aug. 9, 2015 | 7,800 | Disposed |
| Nov. 18, 2010 | PH | Option to Buy | Common Stock | $36.26 | Aug. 10, 2014 | 6,000 | Disposed |
| Aug. 11, 2010 | PH | Stock Appreciation Right | Common Stock | $62.35 | Aug. 10, 2020 | 11,140 | Acquired |
| Aug. 12, 2009 | PH | Option to buy with tandem stock appreciation right | Common Stock | $49.46 | Aug. 11, 2019 | 14,295 | Acquired |
| Aug. 13, 2008 | PH | Option to buy with tandem stock appreciation right | Common Stock | $65.34 | Aug. 12, 2018 | 11,700 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 11, 2008 | PH | Common Stock | 4,337 | Indirect |
| March 11, 2008 | PH | Common Stock | 4 | Direct |
| March 11, 2008 | PH | Option to Buy | 6,000 | Direct |
| March 11, 2008 | PH | Stock Appreciation Right | 7,800 | Direct |
| March 11, 2008 | PH | Stock Appreciation Right | 8,100 | Direct |
| March 11, 2008 | PH | Stock Appreciation Right | 8,235 | Direct |