WESCO INTERNATIONAL INC amendment to a Schedule 13G/A reports that BlackRock Portfolio Management LLC beneficially owns 4,937,210 shares of Common Stock, equal to 10.1% of the class. The cover shows 02/27/2026 and the filing is signed 03/04/2026.
The filing states sole voting power of 4,783,662 shares and sole dispositive power of 4,937,210, and notes various persons may receive dividends or sale proceeds on behalf of other accounts.
Positive
None.
Negative
None.
Insights
BlackRock holds a >10% stake in WESCO, reported via an amended Schedule 13G/A.
The filing lists 4,937,210 shares beneficially owned, representing 10.1% of the class, with sole voting power of 4,783,662 and sole dispositive power of 4,937,210. The document is an amendment and identifies BlackRock Portfolio Management LLC as the reporting entity.
Holder identity, voting and dispositive counts are explicit; cash‑flow treatment or planned dispositions are not stated in the excerpt. Subsequent filings or disclosures would show any sales or strategy changes.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
WESCO INTERNATIONAL INC
(Name of Issuer)
Common Stock
(Title of Class of Securities)
02/27/2026
(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)
SCHEDULE 13G
CUSIP Number(s):
1
Names of Reporting Persons
BlackRock Portfolio Management LLC
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
4,783,662.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
4,937,210.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,937,210.00
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)
10.1 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
WESCO INTERNATIONAL INC
(b)
Address of issuer's principal executive offices:
225 WEST STATION SQUARE DRIVE, STE 700, PITTSBURGH, PENNSYLVANIA, 15219
Item 2.
(a)
Name of person filing:
BlackRock Portfolio Management LLC
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 Portfolio Management LLC, 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.:
95082P105
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:
4,937,210
(b)
Percent of class:
10.1%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
4,783,662
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
4,937,210
(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 WESCO INTERNATIONAL INC. No one person's interest in the common stock of WESCO INTERNATIONAL 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 Portfolio Management LLC reports beneficial ownership of 4,937,210 shares, which the filing states equals 10.1% of the outstanding common stock as disclosed on the cover page.
What voting and dispositive powers does BlackRock report?
The filing shows sole voting power for 4,783,662 shares and sole dispositive power for 4,937,210 shares, with no shared voting or dispositive power reported.
Does the Schedule 13G/A show BlackRock intends to sell WESCO shares?
The amendment lists beneficial ownership and power counts but does not state any intent to sell or acquire additional shares; the excerpt does not disclose planned transactions or timing.
When was this ownership information signed and filed?
The cover shows the reporting date 02/27/2026 and the schedule is signed by Spencer Fleming as Managing Director on 03/04/2026 per the signature block.
