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  4. [Form 4] WESCO INTERNATIONAL INC Insider Trading Activity

WESCO International (NYSE: WCC) EVP buys stock and receives options

Filing Impact
(Moderate)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

WESCO International executive Daniel J Castillo, EVP & GM, EES, reported two insider transactions dated 2026-08-04. He received a grant of stock options for 914 shares of common stock at an exercise price of $374.10 per share, vesting in three equal annual installments beginning on the first anniversary of grant. He also purchased 960 shares of common stock at $365.89 per share, bringing his direct common stock holdings to 16,305.3155 shares.

Positive

  • None.

Negative

  • None.
Insider Castillo Daniel J
Role EVP & GM, EES
Bought 960 shs ($351K)
Type Security Shares Price Value
Grant/Award Stock Options (Right to Buy) F1 914 $0.00 $0.00
Purchase Common Stock 960 $365.89 $351K
Holdings After Transaction: Stock Options (Right to Buy) — 914 shares (Direct); Common Stock — 16,305.3155 shares (Direct)
Footnotes (1)
  1. F1. The stock options become exercisable in three equal annual installments beginning on the first anniversary of the date of grant.
Common shares purchased 960 shares Direct purchase of Common Stock on 2026-08-04
Purchase price per share $365.8900 Price paid for each share of Common Stock purchased on 2026-08-04
Direct common shares after transaction 16,305.3155 shares Directly owned Common Stock following the 960-share purchase
Stock options granted 914 options Stock Options (Right to Buy) granted on 2026-08-04
Option exercise price $374.1000 per share Exercise price for the 914 stock options granted
Option expiration date 2036-08-04 Expiration date of the granted stock options
Stock Options (Right to Buy) financial
"security_title lists "Stock Options (Right to Buy)" for the grant"
Grant, award, or other acquisition financial
"transaction_code_description states "Grant, award, or other acquisition""
Purchase in open market or private transaction financial
"transaction_code_description notes "Purchase in open market or private transaction""

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FAQ

What insider transactions did Daniel J Castillo report for WESCO (WCC)?
Daniel J Castillo reported two transactions involving WESCO (WCC) on 2026-08-04: a grant of 914 stock options with a $374.10 exercise price, and a direct purchase of 960 common shares at $365.89 per share, increasing his holdings to 16,305.3155 shares.

How many WESCO (WCC) shares did Castillo buy and at what price?
Castillo bought 960 shares of WESCO common stock at $365.89 per share on 2026-08-04. This open-market or private transaction increased his directly owned common stock position to 16,305.3155 shares after the purchase.

What stock options were granted to Daniel J Castillo in this WCC Form 4?
Castillo received a grant of stock options for 914 shares of WESCO common stock with a $374.10 exercise price, expiring on 2036-08-04. The options become exercisable in three equal annual installments beginning on the first anniversary of the grant date.

How many WESCO (WCC) shares does Castillo own after these transactions?
After the reported transactions, Castillo directly owns 16,305.3155 shares of WESCO common stock. This figure reflects his position following the purchase of 960 shares on 2026-08-04 and does not include the unexercised stock options granted the same day.

When do Daniel J Castillo’s newly granted WESCO options become exercisable?
The newly granted WESCO options become exercisable in three equal annual installments, starting on the first anniversary of the grant date. This vesting schedule gradually increases the portion of the 914 options that Castillo can exercise over three years.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Castillo Daniel J
(Last)(First)(Middle)
225 WEST STATION SQUARE DRIVE
SUITE 700
(Street)
PITTSBURGH PENNSYLVANIA 15219-1122
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
WESCO INTERNATIONAL INC [ WCC ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP & GM, EES
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/04/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/04/2026P960A$365.8916,305.3155D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options (Right to Buy)$374.108/04/2026A914 (1)08/04/2036Common Stock914$0914D
Explanation of Responses:
1. The stock options become exercisable in three equal annual installments beginning on the first anniversary of the date of grant.
/s/ Michele Nelson, as Attorney-in-Fact08/05/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR