As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Macom Technology Solutions Holdings Inc. The largest reported stake is Fmr LLC's, at 11.8%. 17 filings are on record since July 24, 2025 (Schedule 13G/A, November 5, 2026).
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Key facts
- · Reporting person: Fmr LLC · Sole voting: 8,928,612 · Shared voting: 0 · Sole dispositive: 8,993,391 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-11-05
- · Reporting person: Susan M. Ocampo · Sole voting: 0 · Shared voting: 4,884,490 · Sole dispositive: 0 · Shared dispositive: 4,884,490 · SCHEDULE 13G/A, 2026-10-30
- · Reporting person: T. Rowe Price Investment Management, Inc. · Sole voting: 2,841,849 · Shared voting: 0 · Sole dispositive: 2,850,185 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-14
- · Holder: Susan M. Ocampo · Percent: 6.4% · SCHEDULE 13G/A
- · Reporting person: BlackRock, Inc. · Sole voting: 7,776,818 · Shared voting: 0 · Sole dispositive: 7,964,299 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-08
Macom Technology Solutions Holdings Inc has 17 Schedule 13D or 13G filings on record since 2025-07-24. 3 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Fmr LLC | 11.8% | 8,993,391 | SCHEDULE 13G/A, 2026-11-05 | 2026-09-30 |
| BlackRock, Inc. | 10.4% | 7,964,299 | SCHEDULE 13G/A, 2026-07-08 | 2026-06-30 |
| 6.4% | 4,884,490 | SCHEDULE 13G/A, 2026-10-30 | 2026-09-30 | |
| T. Rowe Price Investment Management, Inc. | 3.7% | 2,850,185 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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Keep reading
More on Macom Technology Solutions Holdings Inc and the records around it.
Macom Technology Solutions Holdings Inc elsewhere on the record
Companies that share a holder
- T. Rowe Price Investment Management, Inc. also filed stake reports on 167 other companies: CABALETTA BIO INC (Nov 2026), MADISON SQUARE GARDEN SPORTS CORP (Nov 2026), MSG RANGERS CORP (Nov 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
- BlackRock, Inc. also filed stake reports on 1596 other companies: AvePoint, Inc. (Nov 2026), BIOMARIN PHARMACEUTICAL INC (Nov 2026), MSG RANGERS CORP (Nov 2026)
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What the Full Report on Macom Technology Solutions Holdings Inc covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Fmr LLC | 8,928,612 | 0 | 8,993,391 | 0 | SCHEDULE 13G/A, 2026-11-05 |
| Abigail P. Johnson | 0 | 0 | 8,993,391 | 0 | SCHEDULE 13G/A, 2026-11-05 |
| BlackRock, Inc. | 7,776,818 | 0 | 7,964,299 | 0 | SCHEDULE 13G/A, 2026-07-08 |
| Susan M. Ocampo | 0 | 4,884,490 | 0 | 4,884,490 | SCHEDULE 13G/A, 2026-10-30 |
| T. Rowe Price Investment Management, Inc. | 2,841,849 | 0 | 2,850,185 | 0 | SCHEDULE 13G/A, 2026-08-14 |
The latest filing identifies Macom Technology Solutions Holdings Inc by CUSIP 55405Y100 and gives its principal executive office as 100 CHELMSFORD STREET, Lowell, MA 01851 (SCHEDULE 13G/A, 2026-11-05).
What the percentages are based on
The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference. Percentage ownership is based on 76,370,931 shares of Common Stock outstanding as of September 30, 2026.Susan M. Ocampo, SCHEDULE 13G/A, 2026-10-30
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-24 | Susan M. Ocampo | 13.5% | SCHEDULE 13G/A |
| 2025-08-06 | Fmr LLC | 7.5% | SCHEDULE 13G/A |
| 2025-10-17 | BlackRock, Inc. | 9.1% | SCHEDULE 13G/A |
| 2025-10-20 | Susan M. Ocampo | 12.5% | SCHEDULE 13G/A |
| 2025-11-14 | T. Rowe Price Investment Management, Inc. | 7.4% | SCHEDULE 13G |
| 2026-02-02 | Susan M. Ocampo | 10.7% | SCHEDULE 13G/A |
| 2026-02-05 | Fmr LLC | 8.9% | SCHEDULE 13G/A |
| 2026-02-06 | Fmr LLC | 10.7% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-05-05 | Susan M. Ocampo | 9.1% | SCHEDULE 13G/A |
| 2026-05-06 | Fmr LLC | 14.1% | SCHEDULE 13G/A |
| 2026-05-15 | T. Rowe Price Investment Management, Inc. | 6% | SCHEDULE 13G/A |
| 2026-07-08 | BlackRock, Inc. | 10.4% | SCHEDULE 13G/A |
| 2026-08-12 | Susan M. Ocampo | 6.4% | SCHEDULE 13G/A |
| 2026-08-14 | T. Rowe Price Investment Management, Inc. | 3.7% | SCHEDULE 13G/A |
| 2026-10-30 | Susan M. Ocampo | 6.4% | SCHEDULE 13G/A |
| 2026-11-05 | Fmr LLC | 11.8% | SCHEDULE 13G/A |
Questions about who owns Macom Technology Solutions Holdings Inc
Who owns Macom Technology Solutions Holdings Inc?
On this page, 3 holders' latest ownership filings report 5% or more of Macom Technology Solutions Holdings Inc: Fmr LLC (11.8%, Schedule 13G/A, filed 2026-11-05), BlackRock, Inc. (10.4%, Schedule 13G/A, filed 2026-07-08) and Susan M. Ocampo (6.4%, Schedule 13G/A, filed 2026-10-30).
Who are the largest shareholders of Macom Technology Solutions Holdings Inc?
By the share each holder's latest filing reports, the largest holders of Macom Technology Solutions Holdings Inc on this page are Fmr LLC (11.8%), BlackRock, Inc. (10.4%) and Susan M. Ocampo (6.4%).
When did Fmr LLC buy into Macom Technology Solutions Holdings Inc?
The filings give report dates, not purchase dates. The earliest filing from Fmr LLC on this page is the Schedule 13G/A, filed 2025-08-06, reporting 7.5%; its latest, Schedule 13G/A filed 2026-11-05, reports 11.8%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 17 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.