ALPS-advised funds report ~9.8% stake in Western Midstream (WES)

Rhea-AI Filing Summary

Western Midstream Partners LP is reported in an amended Schedule 13G/A showing sizeable passive holdings as of 03/31/2026. ALPS Advisors, Inc. reports shared voting and dispositive power over 38,637,354 common units (9.82%). Alerian MLP ETF reports shared voting and dispositive power over 38,126,346 common units (9.68%). The filing states these shares are owned by investment funds advised by ALPS Advisors, and ALPS Advisors disclaims beneficial ownership of the securities it advises.

Key Figures

ALPS Advisors units: 38,637,354 units ALPS Advisors percent: 9.82% Alerian MLP ETF units: 38,126,346 units +1 more

4 metrics

ALPS Advisors units 38,637,354 units Amount beneficially owned as reported (03/31/2026)

ALPS Advisors percent 9.82% Percent of class reported (03/31/2026)

Alerian MLP ETF units 38,126,346 units Amount beneficially owned as reported (03/31/2026)

Alerian MLP ETF percent 9.68% Percent of class reported (03/31/2026)

Key Terms

Schedule 13G/A, beneficial ownership, Investment Company Act of 1940

3 terms

Schedule 13G/A regulatory

"Amended Schedule 13G/A reporting passive ownership stakes"

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.

beneficial ownership regulatory

"AAI disclaims beneficial ownership of such securities"

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.

Investment Company Act of 1940 regulatory

"investment companies registered under the Investment Company Act of 1940"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 9)

Western Midstream Partners LP

(Name of Issuer)

Common Units Representing Limited Partner Interests

(Title of Class of Securities)

958669103

(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): 958669103

1

Names of Reporting Persons

ALPS Advisors, 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

COLORADO

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 38,637,354.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 38,637,354.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

38,637,354.00

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)

9.82 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 958669103

1

Names of Reporting Persons

Alerian MLP ETF

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 0.00
6	Shared Voting Power 38,126,346.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 38,126,346.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

38,126,346.00

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)

9.68 %

12

Type of Reporting Person (See Instructions)

IV

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Western Midstream Partners LP
(b)	Address of issuer's principal executive offices: 9950 Woodloch Forest Drive, Suite 2800, The Woodlands, TX, 77380-7046
Item 2.
(a)	Name of person filing: (1) ALPS Advisors, Inc. (2) Alerian MLP ETF
(b)	Address or principal business office or, if none, residence: (1) ALPS Advisors, Inc.: 1290 Broadway, Suite 1000, Denver, CO, 80203 (2) Alerian MLP ETF: 1290 Broadway, Suite 1000, Denver, CO, 80203
(c)	Citizenship: (1) ALPS Advisors, Inc.: Colorado (2) Alerian MLP ETF: Delaware
(d)	Title of class of securities: Common Units Representing Limited Partner Interests
(e)	CUSIP No.:
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: (1) ALPS Advisors, Inc.: 38637354 (2) Alerian MLP ETF: 38126346
(b)	Percent of class: (1) ALPS Advisors, Inc.: 9.82% (2) Alerian MLP ETF: 9.68%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: (1) ALPS Advisors, Inc.: 38637354 (2) Alerian MLP ETF: 38126346
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: (1) ALPS Advisors, Inc.: 38637354 (2) Alerian MLP ETF: 38126346
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. ALPS Advisors, Inc. ("AAI"), an investment adviser registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to investment companies registered under the Investment Company Act of 1940 (collectively referred to as the "Funds"). In its role as investment advisor, AAI has voting and/or investment power over the securities of the Issuer that are owned by the Funds, and may be deemed to be the beneficial owner of the shares of the Issuer held by the Funds. However, all securities reported in this schedule are owned by the Funds. AAI disclaims beneficial ownership of such securities. In addition, the filing of this Schedule 13G shall not be construed as an admission that the reporting person or any of its affiliates is the beneficial owner of any securities covered by this Schedule 13G for any other purposes than Section 13(d) of the Securities Exchange Act of 1934. Alerian MLP ETF is an investment company registered under the Investment Company Act of 1940 and is one of the Funds to which AAI provides investment advice.
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.

ALPS Advisors, Inc.

Signature:	/s/ Matthew Sutula
Name/Title:	Matthew Sutula, Chief Compliance Officer
Date:	04/06/2026

Alerian MLP ETF

Signature:	/s/ Matthew Sutula
Name/Title:	Matthew Sutula, Chief Compliance Officer
Date:	04/06/2026

FAQ

What ownership stake does ALPS Advisors report in Western Midstream (WES)?

ALPS Advisors reports shared voting and dispositive power over 38,637,354 units (9.82%). This position is held by investment funds advised by ALPS Advisors, and the adviser disclaims direct beneficial ownership of those fund-held units.

How much does Alerian MLP ETF own of Western Midstream (WES)?

Alerian MLP ETF reports shared voting and dispositive power over 38,126,346 units (9.68%). The ETF is one of the funds advised by ALPS Advisors and is reported separately on the amended Schedule 13G/A.

Does ALPS Advisors claim beneficial ownership of the reported shares?

No. ALPS Advisors states it furnishes investment advice to funds that own the shares and expressly disclaims beneficial ownership. The filing attributes the securities to the funds that actually hold them.

What document reports these holdings for WES and when was it signed?

An amended Schedule 13G/A reports these holdings and is signed by Matthew Sutula, Chief Compliance Officer, with signature dates shown as 04/06/2026. The ownership figures are tied to 03/31/2026.