CHUNG PETER Y 4

4 · MACOM Technology Solutions Holdings, Inc. · Filed May 18, 2026

AI-generated summary of this filing

Updated May 18, 2026

MTSI Director Peter Chung Sells 43,268 Shares

What Happened

Peter Y. Chung, a director of MACOM Technology Solutions Holdings, Inc. (MTSI), disposed of 43,268 shares on May 14, 2026 in an open-market or private sale. The weighted-average price reported was $378.20 per share (prices ranged $377.80–$379.44), for total proceeds of approximately $16,363,923. The filing notes the shares were sold in multiple transactions and the reporting person will provide a per-price breakdown on request.

Key Details

Transaction date: May 14, 2026; Transaction type: Sale (S) — open-market or private sale.
Price: Weighted-average $378.20; reported execution prices ranged from $377.80 to $379.44 (footnote F1).
Shares sold: 43,268; gross proceeds ≈ $16,363,923.
Shares owned after transaction: Not explicitly stated in the report. Footnote F2/F3 states 6,781 shares and restricted stock units are held in Mr. Chung’s name for the benefit of Summit Partners, L.P.; Summit Partners has voting/dispositive authority and may be deemed to beneficially own those holdings (they disclaim ownership except for pecuniary interest).
Filing date/timeliness: Form 4 was filed May 18, 2026 (covers the May 14 transaction) — appears timely (filed within the SEC’s two-business-day window). Footnote F1 confirms multiple trade prices and an undertaking to provide per-price details on request.

Context

This sale appears connected to holdings held for the benefit of Summit Partners, L.P., an investment vehicle over which Mr. Chung and another partner share committee authority; such trades can reflect institutional disposition rather than a personal view of the company. Sales are common insider transactions and, unlike purchases, are typically less informative about insider sentiment.

Form 4

Period: 2026-05-14

Director

Transactions

Sale
Common Stock
[F1][F2][F3]
2026-05-14$378.20/sh−43,268$16,363,923→ 6,781 total(indirect: See Remarks)

Footnotes (3)

[F1]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $377.80 to $379.44. The Reporting Person undertakes to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[F2]The 6,781 shares and restricted stock units are held in the name of Mr. Chung, which are held for the benefit of Summit Partners, L.P.
[F3]Mr. Chung holds any Common Stock and restricted stock units for the benefit of Summit Partners, L.P. which he has empowered to determine when the underlying shares will be sold and which is entitled to the proceeds of any such sales. Summit Partners, L.P., through a two-person Investment Committee, responsible for voting and investment decisions with respect to the Issuer, currently composed of Scott C. Collins and Peter Y. Chung, has voting and dispositive authority over the shares and restricted stock units reported herein and therefore may be deemed to beneficially own such shares. Summit Partners, L.P., Mr. Collins and Mr. Chung disclaim beneficial ownership of the shares of common stock and the restricted stock units, except to the extent of their pecuniary interest therein.

Signature

Adam H. Hennessey, POA for Peter Y. Chung|2026-05-18

1 file