SEC Form 4 · accession 0001628280-26-052370

· NOC

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Mark A Welsh III

Director

Period of report

Aug 3, 2026

Accepted (ET)

Aug 4, 2026 · 1:45 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001133421

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^F1,F2	Aug 3, 2026	S	8	$544.53	D	4,480	D
Common Stock^F1,F3	Aug 3, 2026	S	19	$545.59	D	4,461	D
Common Stock^F1,F4	Aug 3, 2026	S	11	$546.42	D	4,450	D
Common Stock^F1,F5	Aug 3, 2026	S	31	$547.42	D	4,419	D
Common Stock^F1,F6	Aug 3, 2026	S	10	$548.32	D	4,409	D
Common Stock^F1,F7	Aug 3, 2026	S	6	$549.50	D	4,403	D
Common Stock^F1	Aug 3, 2026	S	2	$550.68	D	4,401	D
Common Stock^F1	Aug 3, 2026	S	2	$552.95	D	4,399	D
Common Stock^F1	Aug 3, 2026	S	2	$553.90	D	4,397	D
Common Stock^F1,F8	Aug 3, 2026	S	4	$554.14	D	4,393	D

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 23, 2025.
F2Represents the weighted average sale price of $544.53 rounded to the nearest hundredth. The highest price at which the shares were sold was $544.81 and the lowest price at which the shares were sold was $544.03. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
F3Represents the weighted average sale price of $545.59 rounded to the nearest hundredth. The highest price at which the shares were sold was $545.82 and the lowest price at which the shares were sold was $545.12. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
F4Represents the weighted average sale price of $546.42 rounded to the nearest hundredth. The highest price at which the shares were sold was $546.89 and the lowest price at which the shares were sold was $546.05. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
F5Represents the weighted average sale price of $547.42 rounded to the nearest hundredth. The highest price at which the shares were sold was $547.94 and the lowest price at which the shares were sold was $547.12. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
F6Represents the weighted average sale price of $548.32 rounded to the nearest hundredth. The highest price at which the shares were sold was $548.78 and the lowest price at which the shares were sold was $548.11. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
F7Represents the weighted average sale price of $549.50 rounded to the nearest hundredth. The highest price at which the shares were sold was $549.74 and the lowest price at which the shares were sold was $549.03. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.
F8Represents the weighted average sale price of $554.14 rounded to the nearest hundredth. The highest price at which the shares were sold was $554.17 and the lowest price at which the shares were sold was $554.11. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4.