Duncan J. Palmer - 12 May 2026 Form 4 Insider Report for OSHKOSH CORP (OSK)

Reporting relationship: Director
Issuer ticker: OSK
Reported as of: 12 May 2026
Net transaction value: -$67,599
SEC form: 4
Accepted by SEC: 13 May 2026, 11:09:08 UTC
Prior SEC filing: 06 May 2026
Source filing: View source filing
Reporting owner signature: Ignacio A. Cortina, for Duncan J. Palmer

Key filing fact

Duncan J. Palmer filed Form 4 for OSHKOSH CORP (OSK) on 13 May 2026.

Key facts

This page summarizes Duncan J. Palmer's Form 4 filing for OSHKOSH CORP (OSK).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 13 May 2026, 11:09.

Change

Previous filing in this sequence was filed on 06 May 2026.
Current net transaction value: -$67,599.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001411587 Primary reporting owner

Palmer Duncan

Relationship: Director
Address: C/O OSHKOSH CORPORATION, 1917 FOUR WHEEL DRIVE, OSHKOSH
Signature: Ignacio A. Cortina, for Duncan J. Palmer
Signature date: 13 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OSK transaction

Common Stock

Sale

Transaction value: $67,599
Shares: -505
Change %: -1.3%
Price: $133.86
Shares after: 39,684
Date: 12 May 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 1 footnote

Footnote F1

Shares were sold pursuant to a Rule 10b5-1 plan adopted on February 3, 2026, with the sale proceeds to be used to satisfy Mr. Palmer's estimated income tax obligations associated with the shares received on May 5, 2026.