Seagate Technology Holdings plc — DEFA14A Filings
25 DEFA14A filings on record
This page lists all DEFA14A filings submitted to the SEC by Seagate Technology Holdings plc (STX), sorted by most recent first. Each row links to the full filing on EdgarLookup. Seagate Technology Holdings plc has filed 25 DEFA14A documents with the SEC since 2017. To view all SEC filings by Seagate Technology Holdings plc, see the full filings list.
All
10-12G
10-12G/A
10-K
10-K/A
10-Q
10-Q/A
144
15-12B
15-15D
25
25-NSE
3
3/A
4
4/A
424B3
424B4
424B5
424B7
425
5
5/A
8-A12B
8-A12B/A
8-K
8-K/A
8-K12B
8-K12B/A
ARS
CERTNAS
CERTNYS
CORRESP
D
DEF 14A
DEFA14A
DEFM14A
DEFR14A
EFFECT
FWP
NO ACT
POS AM
POSASR
PRE 14A
RW
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-C
SC TO-T
SC TO-T/A
SCHEDULE 13G
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0001137789-25-000212 | Sep 9, 2025 | — |
| DEFA14A | DEFA14A | 0001137789-24-000086 | Sep 3, 2024 | — |
| DEFA14A | DEFA14A | 0001137789-23-000063 | Sep 5, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-22-236649 | Sep 1, 2022 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-21-260599 | Aug 30, 2021 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-21-111538 | Apr 9, 2021 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-21-073174 | Mar 8, 2021 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-20-236403 | Aug 31, 2020 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-19-242011 | Sep 10, 2019 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-19-067194 | Mar 7, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-18-269181 | Sep 7, 2018 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-17-273194 | Aug 30, 2017 | — |
| DEFA14A | DEFA14A | 0001104659-16-143993 | Sep 9, 2016 | — |
| DEFA14A | DEFA14A | 0001104659-15-063812 | Sep 4, 2015 | — |
| DEFA14A | DEFA14A | 0001104659-14-064548 | Sep 3, 2014 | — |
| DEFA14A | DEFA14A | 0001104659-13-074614 | Oct 8, 2013 | — |
| DEFA14A | DEFA14A | 0001104659-13-069270 | Sep 11, 2013 | — |
| DEFA14A | DEFA14A | 0001104659-12-062847 | Sep 11, 2012 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001104659-10-004215 | Feb 1, 2010 | — |
| DEFA14A | DEFA14A | 0001104659-09-055185 | Sep 18, 2009 | — |
| DEFA14A | DEFA14A | 0001104659-09-055182 | Sep 18, 2009 | — |
| DEFA14A | DEFA14A | 0001104659-09-051815 | Aug 26, 2009 | — |
| DEFA14A | DEFA14A | 0001104659-09-051111 | Aug 24, 2009 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-08-213543 | Oct 21, 2008 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-08-198649 | Sep 19, 2008 | — |