Leidos Holdings, Inc. — DEFA14A Filings
39 DEFA14A filings on record
This page lists all DEFA14A filings submitted to the SEC by Leidos Holdings, Inc. (LDOS), sorted by most recent first. Each row links to the full filing on EdgarLookup. Leidos Holdings, Inc. has filed 39 DEFA14A documents with the SEC since 2019. To view all SEC filings by Leidos Holdings, Inc., see the full filings list.
All
10-K
10-K/A
10-KT
10-KT/A
10-Q
10-Q/A
11-K
144
15-12B
15-12B/A
15-12G
3
3/A
4
4/A
424B2
424B3
424B4
425
5
8-A12B
8-A12G
8-K
8-K/A
ARS
AW
CERTNYS
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFM14A
EFFECT
FWP
NO ACT
POS AM
PRE 14A
PREM14A
PRER14A
PX14A6G
S-1
S-1/A
S-3ASR
S-4
S-4 POS
S-4/A
S-8
S-8 POS
SC 13G
SC 13G/A
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0001336920-26-000140 | Mar 19, 2026 | — |
| DEFA14A | DEFA14A | 0001628280-25-013184 | Mar 17, 2025 | — |
| DEFA14A | DEFA14A | 0001336920-24-000023 | Mar 12, 2024 | — |
| DEFA14A | DEFA14A | 0001336920-23-000026 | Mar 15, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-22-077297 | Mar 16, 2022 | — |
| DEFA14A | DEFA14A | 0001193125-21-087549 | Mar 19, 2021 | — |
| DEFA14A | DEFA14A | 0001336920-20-000027 | Apr 10, 2020 | — |
| DEFA14A | DEFA14A | 0001193125-20-079548 | Mar 20, 2020 | — |
| DEFA14A | DEFA14A | 0001193125-19-074857 | Mar 14, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-18-097867 | Mar 27, 2018 | — |
| DEFA14A | DEFA14A | 0001193125-17-101840 | Mar 29, 2017 | — |
| DEFA14A | DEFA14A | 0001193125-15-134548 | Apr 17, 2015 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-14-160136 | Apr 25, 2014 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-13-174340 | Apr 26, 2013 | — |
| DEFA14A | NOTICE AND ACCESS CARD | 0001193125-12-191771 | Apr 30, 2012 | — |
| DEFA14A | NOTICE AND ACCESS CARD | 0001193125-11-112313 | Apr 27, 2011 | — |
| DEFA14A | ADDITIONAL MATERIALS | 0001193125-10-097289 | Apr 29, 2010 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-09-122516 | Jun 1, 2009 | — |
| DEFA14A | ADDITIONAL MATERIALS | 0001193125-09-119173 | May 27, 2009 | — |
| DEFA14A | ADDITIONAL MATERIALS | 0001193125-09-100085 | May 5, 2009 | — |
| DEFA14A | SOLICITING MATERIALS | 0001193125-09-088467 | Apr 27, 2009 | — |
| DEFA14A | SOLICITING MATERIALS | 0001193125-09-085893 | Apr 23, 2009 | — |
| DEFA14A | SOLICITING MATERIALS | 0001193125-09-081588 | Apr 17, 2009 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-09-081295 | Apr 17, 2009 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-09-081293 | Apr 17, 2009 | — |
| DEFA14A | SOLICITING MATERIAL | 0001193125-09-073160 | Apr 6, 2009 | — |
| DEFA14A | SOLICITING MATERIAL | 0001193125-09-073159 | Apr 6, 2009 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-08-100227 | May 2, 2008 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-08-099531 | May 2, 2008 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-08-099216 | May 1, 2008 | — |
| DEFA14A | FORM DEFA14A | 0001193125-07-129704 | Jun 5, 2007 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-07-128941 | Jun 4, 2007 | — |
| DEFA14A | SOLICITING MATERIAL | 0001193125-07-127894 | Jun 1, 2007 | — |
| DEFA14A | DEFINTIVE ADDITIONAL MATERIALS | 0001193125-07-127102 | May 31, 2007 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-07-124557 | May 29, 2007 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-07-123553 | May 25, 2007 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-07-121237 | May 23, 2007 | — |
| DEFA14A | PROXY SOLICITATION MATERIALS | 0001193125-07-113413 | May 14, 2007 | — |
| DEFA14A | PROXY SOLICITATION MATERIALS | 0001193125-07-102474 | May 4, 2007 | — |