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Northrop Grumman Corporation (NOC) SEC Filing (8-K) 2013

Browse all Northrop Grumman Corporation SEC filings, including Annual reports (10-K), Quarterly reports (10-Q), 8-K, proxy statements (DEF 14A), and insider filings (Form 4). Access official documents by filing date, reporting period, and form type. ...more

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Last updated: March 17, 2026, 5:32 AM ET

SEC Filings

Date

2013

8-K

Material company events (earnings, M&A, or leadership changes)

May 17, 2013 09:22 AM

2026

4

Insider ownership (buying, selling) activity

Aug 4, 2026 01:45 PM

10-Q

Quarterly financial results and management updates

Jul 21, 2026 04:02 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jul 21, 2026 06:45 AM

4

Insider ownership (buying, selling) activity

Jul 1, 2026 02:41 PM

4

Insider ownership (buying, selling) activity

Jul 1, 2026 02:40 PM

11-K/A

Other SEC filing

Jun 11, 2026 01:02 PM

11-K

Annual performance report of employee stock plans

Jun 11, 2026 10:07 AM

11-K

Annual performance report of employee stock plans

Jun 11, 2026 10:12 AM

11-K/A

Other SEC filing

Jun 11, 2026 01:12 PM

SD

Specialized disclosure report (e.g., conflict minerals)

May 28, 2026 04:33 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:25 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:27 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:28 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:29 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:29 PM

8-K

Material company events (earnings, M&A, or leadership changes)

May 21, 2026 05:02 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:24 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:24 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:23 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:22 PM

4

Insider ownership (buying, selling) activity

May 21, 2026 03:20 PM

SC 13G/A

Updated passive ownership disclosure

May 14, 2026 12:52 PM

DEFA14A

Additional or supplemental proxy disclosures

May 13, 2026 04:31 PM

4

Insider ownership (buying, selling) activity

May 5, 2026 04:40 PM

SC 13G

Passive large shareholder ownership disclosure

Apr 30, 2026 11:46 AM

10-Q

Quarterly financial results and management updates

Apr 21, 2026 04:03 PM

S-3ASR

Automatic shelf registration for eligible issuers

Apr 21, 2026 05:06 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Apr 21, 2026 06:44 AM

ARS

Annual Report to Shareholders

Apr 3, 2026 04:09 PM

DEF 14A

Final shareholder voting details (board elections and executive pay)

Apr 3, 2026 04:05 PM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 10:59 AM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 10:59 AM

SC 13G/A

Updated passive ownership disclosure

Mar 27, 2026 11:05 AM

4

Insider ownership (buying, selling) activity

Mar 3, 2026 04:03 PM

4

Insider ownership (buying, selling) activity

Mar 2, 2026 04:07 PM

4

Insider ownership (buying, selling) activity

Feb 20, 2026 04:42 PM

4

Insider ownership (buying, selling) activity

Feb 20, 2026 04:47 PM

4

Insider ownership (buying, selling) activity

Feb 20, 2026 08:01 PM

4

Insider ownership (buying, selling) activity

Feb 19, 2026 04:30 PM

3

Initial disclosure of insider ownership

Feb 19, 2026 04:50 PM

Northrop Grumman Corporation (Form 8-K) 2013

Current Events / Material company events (earnings, M&A, or leadership changes)

May 17, 2013 09:22 AM

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