BlackRock reports 10.4% stake in MACOM

MACOM Technology Solutions Holdings Inc ownership update: BlackRock, Inc. filed Amendment No. 6 to report beneficial ownership of 7,964,299 shares of Common Stock (10.4%) as of 06/30/2026.

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings Inc ownership update: BlackRock, Inc. filed Amendment No. 6 to report beneficial ownership of 7,964,299 shares of Common Stock (10.4%) as of 06/30/2026. The filing lists 7,776,818 shares with sole voting power and 7,964,299 shares with sole dispositive power.

Insights

Institutional Ownership Analyst

Large passive position reported; ownership exceeds 10%.

BlackRock, Inc. reports beneficial ownership of 10.4% representing 7,964,299 shares of MACOM common stock as of 06/30/2026. The filing shows sole voting power on 7,776,818 shares and sole dispositive power on 7,964,299 shares.

Institutional holdings at this scale are typical for investment managers. Subsequent filings or fund-level disclosures may detail which BlackRock business units hold these shares.

Compliance / Governance Specialist

Amendment clarifies reported holdings and ownership classification.

The Schedule 13G/A amendment format and accompanying Exhibit references indicate an updating of previously reported positions. The cover shows CUSIP 55405Y100 and identifies filing as an amendment.

Signature and exhibit references are present; this aligns with routine regulatory maintenance rather than a corporate action by MACOM.

Key Figures

Beneficial ownership: 7,964,299 shares Percent of class: 10.4% Sole voting power: 7,776,818 shares +2 more

5 metrics

Beneficial ownership 7,964,299 shares as of 06/30/2026

Percent of class 10.4% Common Stock

Sole voting power 7,776,818 shares reported on Schedule 13G/A cover

Sole dispositive power 7,964,299 shares reported on Schedule 13G/A cover

CUSIP 55405Y100 MACOM Common Stock

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 6) MACOM Technology Solutions Holdings Inc Common Stock"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"reflects the securities beneficially owned, or deemed to be beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power regulatory

"Sole Dispositive Power 7,964,299.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

What stake does BlackRock report in MACOM (MTSI)?

BlackRock reports beneficial ownership of 7,964,299 shares, representing 10.4% of MACOM common stock as of 06/30/2026. The filing is an Amendment No. 6 to a Schedule 13G/A and cites CUSIP 55405Y100.

How many shares does BlackRock have voting authority over at MTSI?

BlackRock reports sole voting power over 7,776,818 shares of MACOM common stock. The Schedule 13G/A lists voting and dispositive power counts on the cover page of the amendment.

Does the filing indicate who within BlackRock holds the shares?

The filing states holdings reflect certain Reporting Business Units of BlackRock, Inc.; it does not list specific fund names. Address shown is 50 Hudson Yards, New York, NY and Exhibit references include Item 7 for subsidiary identification.

When was the Schedule 13G/A amendment signed?

The Schedule 13G/A amendment was signed by Spencer Fleming, Managing Director, on 07/08/2026. The reported ownership figures are dated 06/30/2026 on the cover.

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Accepted by SEC EDGAR 07/08/2026 - 11:12 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

MACOM Technology Solutions Holdings Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

55405Y100

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 55405Y100

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 7,776,818.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 7,964,299.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,964,299.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

10.4 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MACOM Technology Solutions Holdings Inc
(b)	Address of issuer's principal executive offices: 100 CHELMSFORD STREET LOWELL MA 01851
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 55405Y100
Item 4.	Ownership
(a)	Amount beneficially owned: 7964299
(b)	Percent of class: 10.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 7776818
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 7964299
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of MACOM Technology Solutions Holdings Inc. No one person's interest in the common stock of MACOM Technology Solutions Holdings Inc is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	07/08/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7