Peter Y Chung

CIK 1239366 · View on SEC EDGAR ↗

Insider

First SEC filing: March 20, 2014 · Latest: March 20, 2014

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Insider at

Insider transactions

0 buys (P) 1 sells (S) Net: $-16,363,958 + 35 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

35 other filings hidden
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 -26.7% (price as of 2026-08-19)
Dec. 7, 2021 ATEN S 700,000 $15.05 $10,535,000 8,877,890 Indirect -7.31% Disposed 70.1% (price as of 2026-08-19)
Nov. 11, 2020 MTSI S 420,368 $42.47 $17,853,029 888,718 Indirect -32.11% Disposed 553.2% (price as of 2026-08-19)
Feb. 2, 2017 MTSI S 1,201,635 $46.55 $55,936,109 17,416 Indirect -98.57% Disposed 495.9% (price as of 2026-08-19)
May 2, 2016 MTSI S 1,400,000 $40.00 $56,000,000 1,215,938 Indirect -53.52% Disposed 593.5% (price as of 2026-08-19)
Feb. 25, 2016 MTSI S 900,000 $36.00 $32,400,000 2,615,938 Indirect -25.60% Disposed 670.6% (price as of 2026-08-19)
Jan. 28, 2016 MTSI S 2,700,000 $37.70 $101,790,000 3,515,938 Indirect -43.44% Disposed 635.8% (price as of 2026-08-19)
May 29, 2015 MTSI S 34,565 $38.32 $1,324,531 6,215,938 Indirect -0.55% Disposed 623.9% (price as of 2026-08-19)
Feb. 11, 2015 MTSI S 2,235,000 $28.58 $63,876,300 6,248,926 Indirect -26.34% Disposed 870.6% (price as of 2026-08-19)
Sept. 11, 2013 UI S 1,300,000 $33.00 $42,900,000 4,764,079 Indirect -21.44% Disposed 1653.0% (price as of 2026-08-19)
Sept. 11, 2013 UI S 13,000,000 $33.00 $429,000,000 4,764,079 Indirect -73.18% Disposed 1653.0% (price as of 2026-08-19)
Sept. 4, 2013 UI S 2,500,000 $31.41 $78,525,000 6,064,079 Indirect -29.19% Disposed 1741.8% (price as of 2026-08-19)
June 13, 2013 UI S 531,464 $16.00 $8,503,424 8,564,079 Indirect -5.84% Disposed 3515.7% (price as of 2026-08-19)
June 4, 2013 UI S 6,000,000 $16.00 $96,000,000 9,095,543 Indirect -39.75% Disposed 3515.7% (price as of 2026-08-19)
March 4, 2013 UI S 1,000,000 $13.31 $13,310,000 15,095,543 Indirect -6.21% Disposed 4246.4% (price as of 2026-08-19)
Nov. 29, 2012 UI S 1,000,000 $11.55 $11,550,000 16,095,543 Indirect -5.85% Disposed 4908.7% (price as of 2026-08-19)
Nov. 9, 2011 UI S 1,055,734 $15.00 $15,836,010 20,095,543 Indirect -4.99% Disposed 3756.7% (price as of 2026-08-19)
Oct. 19, 2011 UI S 2,841,652 $15.00 $42,624,780 21,151,277 Indirect -11.84% Disposed 3756.7% (price as of 2026-08-19)

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 (1,270,679) $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) — — 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.

Date Ticker Security Shares Ownership
March 20, 2014 ATEN Series D Redeemable Convertible Preferred Stock→ Common Stock — Indirect
March 14, 2012 MTSI Class B Convertible Preferred Stock→ Common Stock — Indirect
March 14, 2012 MTSI Warrants→ Common Stock — Indirect
Oct. 13, 2011 UI Series A Preferred Stock→ Common Stock — Indirect