Vanguard Portfolio Management (AROC) discloses 6.33% ownership, 11.1M shares

Rhea-AI Filing Summary

Archrock Inc ownership filing shows Vanguard Portfolio Management reports beneficial ownership of 11,095,912 shares of Common Stock, representing 6.33% of the class as of 03/31/2026. The report states Vanguard has sole dispositive power over 11,095,912 shares and sole voting power for 158,065 shares. The filing notes these holdings reflect securities managed across Vanguard Portfolio Management LLC and certain affiliates, and that no other single person holds >5% of the class under the disclosed arrangements.

Insights

Institutional Ownership Analyst

Vanguard holds a meaningful passive stake at 6.33% with dispositive control across managed accounts.

Vanguard Portfolio Management reports beneficial ownership of 11,095,912 shares and sole dispositive power over the same amount as of 03/31/2026. The filing is a Schedule 13G-style disclosure indicating passive or qualifying investor status rather than an active change in control.

Watch subsequent ownership filings for any shift to an active role or change in percentage; Vanguard's statement ties holdings to multiple affiliated funds and managed accounts, which explains the aggregation.

Key Figures

Beneficial ownership: 11,095,912 shares Percent of class: 6.33% Sole voting power: 158,065 shares +2 more

5 metrics

Beneficial ownership 11,095,912 shares reported as of 03/31/2026

Percent of class 6.33% percent of common stock reported

Sole voting power 158,065 shares shares with sole power to vote

Sole dispositive power 11,095,912 shares shares with sole power to dispose

CUSIP 03957W106 Archrock Inc Common Stock identifier

Key Terms

Schedule 13G, Beneficial ownership, Sole dispositive power, Sole voting power

4 terms

Schedule 13G regulatory

"Vanguard Portfolio Management reports beneficial ownership on a Schedule 13G"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficial ownership regulatory

"Amount beneficially owned: 11095912 (b) Percent of class: 6.33 %"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 11095912"

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.

Sole voting power financial

"Sole power to vote or to direct the vote: 158065"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Archrock Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

03957W106

(CUSIP Number)

03/31/2026

(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): 03957W106

1

Names of Reporting Persons

Vanguard Portfolio Management

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

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 158,065.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 11,095,912.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

11,095,912.00

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)

6.33 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: 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 Vanguard Portfolio Management LLC and the following affiliates of Vanguard Portfolio Management LLC or business divisions of such affiliates: Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC. This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Portfolio Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power. This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Portfolio Management LLC, or business divisions of such subsidiaries whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Archrock Inc
(b)	Address of issuer's principal executive offices: 9807 Katy Freeway, Suite 100, Houston, TX, 77024
Item 2.
(a)	Name of person filing: Vanguard Portfolio Management
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 03957W106
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 11095912
(b)	Percent of class: 6.33 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 158065
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 11095912
	(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. Vanguard Portfolio Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
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.

Vanguard Portfolio Management

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	04/28/2026

FAQ

What stake does Vanguard Portfolio Management report in Archrock (AROC)?

Vanguard reports beneficial ownership of 11,095,912 shares, equal to 6.33% of Archrock's common stock as of 03/31/2026. The amount is aggregated across Vanguard Portfolio Management LLC and certain affiliates managing client funds.

Does Vanguard have voting control over the Archrock shares?

The filing shows Vanguard has sole voting power for 158,065 shares and sole dispositive power for 11,095,912 shares as reported on the Schedule 13G filing dated 03/31/2026.

Is Vanguard acting on behalf of other persons for its Archrock stake?

Yes. The filing states the holdings reflect securities held by Vanguard funds and client accounts where Vanguard Portfolio Management LLC or affiliates exercise dispositive power; no single outside person is reported as >5%.

What does the 6.33% percent mean for Archrock shareholders?

The 6.33% figure is Vanguard's reported beneficial ownership percentage of common stock as of 03/31/2026. It is a disclosure of ownership size and does not by itself indicate changes in control or voting intentions.