UNION PACIFIC CORP — S-4/A Filings
9 S-4/A filings on record
This page lists all S-4/A filings submitted to the SEC by UNION PACIFIC CORP (UNP), sorted by most recent first. Each row links to the full filing on EdgarLookup. UNION PACIFIC CORP has filed 9 S-4/A documents with the SEC since 2020. To view all SEC filings by UNION PACIFIC CORP, see the full filings list.
All
10-K
10-K/A
10-K405
10-K405/A
10-Q
10-Q/A
11-K
144
15-12B
15-12G
3
3/A
4
4/A
424B2
424B3
424B5
425
5
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
DEFC14A
DEFN14A
DEFR14A
DFAN14A
EFFECT
FWP
NO ACT
POS AM
PRE 14A
PREM14A
PREN14A
PRER14A
PRRN14A
PX14A6G
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
SC 13D
SC 13D/A
SC 13E3
SC 13E3/A
SC 13G
SC 13G/A
SC 14D1
SC 14D1/A
SC TO-T
SC TO-T/A
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| S-4/A | S-4/A | 0001193125-25-224307 | Sep 30, 2025 | — |
| S-4/A | S-4/A | 0001193125-21-252482 | Aug 20, 2021 | — |
| S-4/A | S-4/A | 0001193125-21-132014 | Apr 27, 2021 | — |
| S-4/A | S-4/A | 0001193125-20-100562 | Apr 7, 2020 | — |
| S-4/A | S-4/A | 0001193125-13-466999 | Dec 9, 2013 | — |
| S-4/A | AMENDMENT NO.3 TO FORM S-4 | 0000950130-01-505645 | Nov 28, 2001 | — |
| S-4/A | AMENDMENT NO. 2 TO FORM S-4 | 0000950130-01-505602 | Nov 26, 2001 | — |
| S-4/A | AMENDMENT NO. 1 TO FORM S-4 | 0000950130-01-505491 | Nov 19, 2001 | — |
| S-4/A | AMENDMENT NO. 1 TO REGISTRATION STATEMENT | 0000889812-95-000752 | Dec 12, 1995 | — |