Peter Y Chung
Insider
First SEC filing: March 20, 2014 · Latest: March 20, 2014
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-16,363,958
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 |
|---|---|---|---|---|---|---|---|---|---|
| May 14, 2026 | MTSI | S | 43,268 | $378.20 | $16,363,958 | 6,781 Indirect | -86.45% | Disposed | -15.9% (price as of 2026-10-05) |
| April 22, 2026 | ATEN | A | 7,233 | · | · | 207,298 Indirect | +3.62% | Acquired | (price as of 2026-10-05) |
| March 6, 2026 | MTSI | A | 776 | · | · | 50,049 Indirect | +1.57% | Acquired | (price as of 2026-10-05) |
| April 17, 2025 | ATEN | A | 12,698 | · | · | 200,065 Indirect | +6.78% | Acquired | (price as of 2026-10-05) |
| March 7, 2025 | MTSI | A | 1,623 | · | · | 49,273 Indirect | +3.41% | Acquired | (price as of 2026-10-05) |
| Nov. 14, 2024 | ATEN | S | 23,754 | $16.36 | $388,615 | 516,933 Indirect | -4.39% | Disposed | 68.9% (price as of 2026-10-05) |
| Nov. 14, 2024 | ATEN | D | 329,566 | $15.73 | $5,184,073 | 187,367 Indirect | -63.75% | Disposed | 75.7% (price as of 2026-10-05) |
| Nov. 13, 2024 | ATEN | S | 78,479 | $16.59 | $1,301,967 | 540,687 Indirect | -12.67% | Disposed | 66.5% (price as of 2026-10-05) |
| May 20, 2024 | ATEN | S | 3,296,047 | $15.40 | $50,759,124 | 619,166 Indirect | -84.19% | Disposed | 79.4% (price as of 2026-10-05) |
| May 9, 2024 | ATEN | A | 12,903 | · | · | 3,915,213 Indirect | +0.33% | Acquired | (price as of 2026-10-05) |
| March 8, 2024 | MTSI | A | 2,138 | · | · | 47,650 Indirect | +4.70% | Acquired | (price as of 2026-10-05) |
| May 17, 2023 | ATEN | A | 14,104 | · | · | 3,902,310 Indirect | +0.36% | Acquired | (price as of 2026-10-05) |
| March 3, 2023 | MTSI | A | 2,244 | · | · | 45,512 Indirect | +5.19% | Acquired | (price as of 2026-10-05) |
| Nov. 15, 2022 | ATEN | S | 1,500,000 | $17.20 | $25,800,000 | 3,888,206 Indirect | -27.84% | Disposed | 60.6% (price as of 2026-10-05) |
| Sept. 8, 2022 | ATEN | D | 3,500,000 | $12.75 | $44,625,000 | 5,388,206 Indirect | -39.38% | Disposed | 116.7% (price as of 2026-10-05) |
| Aug. 8, 2022 | MTSI | S | 850,311 | $59.00 | $50,168,349 | 43,268 Indirect | -95.16% | Disposed | 439.1% (price as of 2026-10-05) |
| June 24, 2022 | ATEN | A | 10,316 | · | · | 8,888,206 Indirect | +0.12% | Acquired | (price as of 2026-10-05) |
| March 4, 2022 | MTSI | A | 2,768 | · | · | 893,579 Indirect | +0.31% | Acquired | (price as of 2026-10-05) |
| Dec. 7, 2021 | ATEN | S | 700,000 | $15.05 | $10,535,000 | 8,877,890 Indirect | -7.31% | Disposed | 83.6% (price as of 2026-10-05) |
| April 29, 2021 | ATEN | A | 16,949 | · | · | 9,577,890 Indirect | +0.18% | Acquired | (price as of 2026-10-05) |
| March 5, 2021 | MTSI | A | 2,093 | · | · | 890,811 Indirect | +0.24% | Acquired | (price as of 2026-10-05) |
| Nov. 11, 2020 | MTSI | X | 1,270,679 | · | · | 0 Indirect | · | Acquired | (price as of 2026-10-05) |
| Nov. 11, 2020 | MTSI | S | 420,368 | $42.47 | $17,853,029 | 888,718 Indirect | -32.11% | Disposed | 649.0% (price as of 2026-10-05) |
| Nov. 11, 2020 | MTSI | X | 1,270,679 | $14.05 | $17,853,040 | 1,309,086 Indirect | +3308.46% | Acquired | 2163.9% (price as of 2026-10-05) |
| May 27, 2020 | ATEN | A | 21,865 | · | · | 9,560,941 Indirect | +0.23% | Acquired | (price as of 2026-10-05) |
| March 6, 2020 | MTSI | A | 5,414 | · | · | 38,407 Indirect | +16.41% | Acquired | (price as of 2026-10-05) |
| Dec. 4, 2019 | ATEN | A | 23,547 | · | · | 9,539,076 Indirect | +0.25% | Acquired | (price as of 2026-10-05) |
| March 1, 2019 | MTSI | A | 6,656 | · | · | 32,993 Indirect | +25.27% | Acquired | (price as of 2026-10-05) |
| Nov. 7, 2018 | ATEN | A | 23,112 | · | · | 9,515,529 Indirect | +0.24% | Acquired | (price as of 2026-10-05) |
| March 2, 2018 | MTSI | A | 6,086 | · | · | 26,337 Indirect | +30.05% | Acquired | (price as of 2026-10-05) |
| May 31, 2017 | ATEN | A | 18,359 | · | · | 9,492,417 Indirect | +0.19% | Acquired | (price as of 2026-10-05) |
| March 3, 2017 | MTSI | A | 2,835 | · | · | 20,251 Indirect | +16.28% | Acquired | (price as of 2026-10-05) |
| Feb. 2, 2017 | MTSI | S | 1,201,635 | $46.55 | $55,936,109 | 17,416 Indirect | -98.57% | Disposed | 583.3% (price as of 2026-10-05) |
| June 1, 2016 | ATEN | A | 22,590 | · | · | 9,474,058 Indirect | +0.24% | Acquired | (price as of 2026-10-05) |
| May 2, 2016 | MTSI | S | 1,400,000 | $40.00 | $56,000,000 | 1,215,938 Indirect | -53.52% | Disposed | 695.2% (price as of 2026-10-05) |
| March 4, 2016 | MTSI | A | 3,113 | · | · | 2,619,051 Indirect | +0.12% | Acquired | (price as of 2026-10-05) |
| Feb. 25, 2016 | MTSI | S | 900,000 | $36.00 | $32,400,000 | 2,615,938 Indirect | -25.60% | Disposed | 783.6% (price as of 2026-10-05) |
| Jan. 28, 2016 | MTSI | S | 2,700,000 | $37.70 | $101,790,000 | 3,515,938 Indirect | -43.44% | Disposed | 743.7% (price as of 2026-10-05) |
| June 10, 2015 | ATEN | A | 23,622 | · | · | 9,451,468 Indirect | +0.25% | Acquired | (price as of 2026-10-05) |
| May 29, 2015 | MTSI | S | 34,565 | $38.32 | $1,324,531 | 6,215,938 Indirect | -0.55% | Disposed | 730.1% (price as of 2026-10-05) |
| May 15, 2015 | MTSI | A | 1,577 | · | · | 6,250,503 Indirect | +0.03% | Acquired | (price as of 2026-10-05) |
| Feb. 11, 2015 | MTSI | S | 2,235,000 | $28.58 | $63,876,300 | 6,248,926 Indirect | -26.34% | Disposed | 1012.9% (price as of 2026-10-05) |
| Jan. 21, 2015 | MTSI | A | 1,562 | · | · | 8,483,926 Indirect | +0.02% | Acquired | (price as of 2026-10-05) |
| March 26, 2014 | ATEN | C | 9,427,846 | · | · | 9,427,846 Indirect | · | Acquired | (price as of 2026-10-05) |
| March 26, 2014 | ATEN | C | 80,000 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Feb. 28, 2014 | MTSI | A | 2,970 | · | · | 8,482,364 Indirect | +0.04% | Acquired | (price as of 2026-10-05) |
| Nov. 18, 2013 | MTSI | A | 1,377 | · | · | 8,479,394 Indirect | +0.02% | Acquired | (price as of 2026-10-05) |
| Sept. 11, 2013 | UI | S | 1,300,000 | $33.00 | $42,900,000 | 4,764,079 Indirect | -21.44% | Disposed | 1781.1% (price as of 2026-10-05) |
| Sept. 11, 2013 | UI | S | 13,000,000 | $33.00 | $429,000,000 | 4,764,079 Indirect | -73.18% | Disposed | 1781.1% (price as of 2026-10-05) |
| Sept. 4, 2013 | UI | S | 2,500,000 | $31.41 | $78,525,000 | 6,064,079 Indirect | -29.19% | Disposed | 1876.3% (price as of 2026-10-05) |
| June 13, 2013 | UI | S | 531,464 | $16.00 | $8,503,424 | 8,564,079 Indirect | -5.84% | Disposed | 3779.7% (price as of 2026-10-05) |
| June 4, 2013 | UI | S | 6,000,000 | $16.00 | $96,000,000 | 9,095,543 Indirect | -39.75% | Disposed | 3779.7% (price as of 2026-10-05) |
| March 4, 2013 | UI | S | 1,000,000 | $13.31 | $13,310,000 | 15,095,543 Indirect | -6.21% | Disposed | 4563.8% (price as of 2026-10-05) |
| Jan. 22, 2013 | MTSI | A | 3,355 | · | · | 8,474,662 Indirect | +0.04% | Acquired | (price as of 2026-10-05) |
| Nov. 29, 2012 | UI | S | 1,000,000 | $11.55 | $11,550,000 | 16,095,543 Indirect | -5.85% | Disposed | 5274.5% (price as of 2026-10-05) |
| Nov. 2, 2012 | MTSI | A | 831 | · | · | 8,474,662 Indirect | +0.01% | Acquired | (price as of 2026-10-05) |
| May 10, 2012 | UI | J | 50,736 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 10, 2012 | UI | G | 8,000 | · | · | 50,736 Direct | -13.62% | Disposed | (price as of 2026-10-05) |
| May 10, 2012 | UI | J | 58,736 | · | · | 58,736 Direct | · | Acquired | (price as of 2026-10-05) |
| May 10, 2012 | UI | J | 3,000,000 | · | · | 17,095,543 Indirect | -14.93% | Disposed | (price as of 2026-10-05) |
| March 20, 2012 | MTSI | C | 33,884,814 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| March 20, 2012 | MTSI | A | 2,631 | · | · | 8,473,831 Indirect | +0.03% | Acquired | (price as of 2026-10-05) |
| March 20, 2012 | MTSI | C | 8,471,200 | · | · | 8,471,200 Indirect | · | Acquired | (price as of 2026-10-05) |
| Nov. 9, 2011 | UI | S | 1,055,734 | $15.00 | $15,836,010 | 20,095,543 Indirect | -4.99% | Disposed | 4038.4% (price as of 2026-10-05) |
| Oct. 19, 2011 | UI | C | 23,992,929 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Oct. 19, 2011 | UI | S | 2,841,652 | $15.00 | $42,624,780 | 21,151,277 Indirect | -11.84% | Disposed | 4038.4% (price as of 2026-10-05) |
| Oct. 19, 2011 | UI | C | 23,992,929 | · | · | 23,992,929 Indirect | · | Acquired | (price as of 2026-10-05) |
| July 21, 2011 | UI | D | 12,041,700 | $8.97 | $108,014,049 | 23,992,929 Indirect | -33.42% | Disposed | 6820.3% (price as of 2026-10-05) |
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. 11, 2020 | MTSI | Warrant (right to buy) | Common Stock | $14.05 | Dec. 21, 2020 | 1,270,679 | Acquired |
| March 26, 2014 | ATEN | Series D Redeemable Convertible Preferred Stock | Common Stock | · | · | 80,000 | Disposed |
| March 20, 2012 | MTSI | Class B Convertible Preferred Shares | Common Stock | · | · | 33,884,814 | Disposed |
| Oct. 19, 2011 | UI | Series A Preferred Stock | Common Stock | · | · | 23,992,929 | Disposed |
| July 21, 2011 | UI | Series A Preferred Stock | Common Stock | · | · | 12,041,700 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.