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MACOM Technology Solutions Holdings, Inc.

MTSI
Exchange
Nasdaq
Industry
Semiconductors & Related Devices
SEC CIK
0001493594

In the last 90 days, MACOM Technology Solutions Holdings, Inc. insiders filed 0 open-market purchases and 2 sales; 659 institutions reported holding it in 13F filings for Q2 2026, worth $27.7B in total; Maverick Capital is the only superinvestor holding it.

Holders of 5% or more of MTSI

Holders whose latest Schedule 13D or 13G filing reports 5% or more of MACOM Technology Solutions Holdings, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of MTSI
HolderLatest formStakeChangeFirst filedLatest filingFiling
FMR LLC13G/A14.10%10.6M shares+3.40 ppfrom 10.70%Feb 9, 20236 filingsMay 6, 2026SEC
BlackRock, Inc.13G/A10.40%7.96M shares+1.30 ppfrom 9.10%Oct 22, 20244 filingsJul 8, 2026SEC
Ocampo Susan13G/A6.40%4.88M shares−2.70 ppfrom 9.10%Jan 23, 20249 filingsAug 12, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

45 Schedule 13D and 13G filings on MACOM Technology Solutions Holdings, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on MTSI
Filed (ET)FilerFormStakeChangeEvent dateFiling
Aug 14, 202610:39 AM ETT. Rowe Price Investment Management, Inc.13G/A3.70%2.85M shares−2.30 ppfrom 6.00%Below 5%Jun 30, 2026SEC
Aug 12, 20263:02 PM ETOcampo Susan13G/A6.40%4.88M shares−2.70 ppfrom 9.10%Jun 30, 2026SEC
Jul 8, 202611:12 AM ETBlackRock, Inc.13G/A10.40%7.96M shares+1.30 ppfrom 9.10%Jun 30, 2026SEC
May 15, 202610:06 AM ETT. Rowe Price Investment Management, Inc.13G/A6.00%4.49M shares−1.40 ppfrom 7.40%Mar 31, 2026SEC
May 6, 202611:30 AM ETFMR LLCand 1 other13G/A14.10%10.6M shares+3.40 ppfrom 10.70%Mar 31, 2026SEC
May 5, 20269:31 PM ETOcampo Susan13G/A9.10%6.80M shares−1.60 ppfrom 10.70%Mar 31, 2026SEC
Mar 27, 202610:31 AM ETVanguard Group Inc13G/A0.00%0 shares−9.00 ppfrom 9.00%Below 5%Mar 13, 2026SEC
Feb 6, 20261:11 PM ETFMR LLCand 1 other13G/A10.70%8.03M shares+1.80 ppfrom 8.90%Jan 30, 2026SEC
Feb 5, 20261:31 PM ETFMR LLCand 1 other13G/A8.90%6.70M shares+1.40 ppfrom 7.50%Dec 31, 2025SEC
Feb 2, 20261:09 PM ETOcampo Susan13G/A10.70%7.99M shares−1.80 ppfrom 12.50%Dec 31, 2025SEC
Nov 14, 202512:18 PM ETT. Rowe Price Investment Management, Inc.13G7.40%5.48M sharesNewSep 30, 2025SEC
Oct 20, 20254:22 PM ETOcampo Susan13G/A12.50%9.29M shares−1.00 ppfrom 13.50%Sep 30, 2025SEC
Oct 17, 20256:13 PM ETBlackRock, Inc.13G/A9.10%6.74M shares–Sep 30, 2025SEC
Aug 6, 202512:06 PM ETFMR LLCand 1 other13G/A7.50%5.60M shares–Jun 30, 2025SEC
Jul 24, 20255:03 PM ETOcampo Susan13G/A13.50%10.0M shares−1.30 ppfrom 14.80%Jun 30, 2025SEC
May 14, 202510:45 AM ETPrice T Rowe Associates Inc13G/A4.30%3.19M shares−1.20 ppfrom 5.50%Below 5%Mar 31, 2025SEC
Apr 21, 20254:47 PM ETOcampo Susan13G/A14.80%11.0M shares−1.20 ppfrom 16.00%Mar 31, 2025SEC
Feb 14, 20259:44 AM ETPrice T Rowe Associates Inc13G5.50%4.00M shares–Dec 31, 2024SEC
Feb 10, 20255:37 PM ETOcampo Susan13G/A16.00%11.9M shares–Dec 31, 2024SEC
Feb 7, 20251:58 PM ETInvesco Ltd.13G/A4.90%3.55M shares–Below 5%Dec 31, 2024SEC
Jan 30, 20259:58 PM ETVanguard Group Inc13G/A9.00%6.52M shares–Dec 31, 2024SEC
Nov 12, 2024BlackRock, Inc.13G/AOld format–––SEC
Nov 7, 2024Invesco Ltd.13GOld format–New–SEC
Oct 28, 2024Ocampo Susan13G/AOld format–––SEC
Oct 22, 2024BlackRock, Inc.13G/AOld format–––SEC
Feb 16, 2024Price T Rowe Associates Inc13G/AOld format–––SEC
Feb 14, 2024Price T Rowe Associates Inc13GOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2024FMR LLC13G/AOld format–––SEC
Jan 25, 20241:48 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 23, 2024Ocampo Susan13G/AOld format–––SEC
Feb 14, 2023Price T Rowe Associates Inc13GOld format–New–SEC
Feb 13, 20237:31 PM ETAlliancebernstein L.P.13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2023FMR LLC13GOld format–New–SEC
Feb 7, 20232:10 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 12, 2023Ocampo John L13G/AOld format–––SEC
Feb 14, 20224:42 PM ETAlliancebernstein L.P.13GOld format–New–SEC
Feb 10, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 3, 20224:41 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 18, 2022Ocampo John L13G/AOld format–––SEC
Feb 16, 2021Capital Research Global Investors13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Feb 2, 20213:13 PM ETBlackRock Inc.13GOld format–New–SEC
Jan 6, 2021Ocampo John L13G/AOld format–––SEC

Form 144: proposed insider sales

3 notices from officers, directors and other affiliates planning to sell MACOM Technology Solutions Holdings, Inc. shares, newest first.

Form 144 notices for MTSI
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Jun 21, 20234:33 PM ETRobert B DennehyOfficer3.25K$198.5KJun 21, 202310b5-1E*TRADE FINANCIAL CORPORATIONSEC
May 18, 20234:04 PM ETRobert B DennehyOfficer3.25K$194.7KMay 18, 202310b5-1Morgan Stanley Smith Barney LLCSEC
Apr 19, 20233:46 PM ETRobert B DennehyOfficer3.25K$202.8KApr 19, 202310b5-1Morgan Stanley Smith Barney LLCSEC