Oshkosh director sells 505 shares in tax-related trade

Oshkosh Corp director Duncan Palmer reported an open-market sale of 505 shares of Common Stock at $133.86 per share.

Rhea-AI Filing Summary

Oshkosh Corp director Duncan Palmer reported an open-market sale of 505 shares of Common Stock at $133.86 per share. The trade was executed under a pre-arranged Rule 10b5-1 plan, with proceeds designated to cover estimated income tax obligations. After this sale, Palmer directly holds 39,684.07 shares.

Insider Trade Summary 10b5-1

Net Seller: 505 shares

Net Sell 1 txn

Insider Palmer Duncan

Role Director

Sold 505 shs ($68K)

Type	Security	Shares	Price	Value
Sale	Common Stock	505	$133.86	$68K

Holdings After Transaction: Common Stock — 39,684.07 shares (Direct)

Footnotes (1)

1. 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.

Key Figures

Shares sold: 505 shares Sale price: $133.86 per share Shares held after sale: 39,684.07 shares

3 metrics

Shares sold 505 shares Open-market sale on May 12, 2026

Sale price $133.86 per share Common Stock transaction

Shares held after sale 39,684.07 shares Direct ownership post-transaction

Key Terms

Rule 10b5-1 plan, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 plan regulatory

"Shares were sold pursuant to a Rule 10b5-1 plan adopted on February 3, 2026"

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Oshkosh Corp (OSK) disclose for Duncan Palmer?

Oshkosh Corp director Duncan Palmer reported selling 505 shares of Common Stock in an open-market transaction. The shares were sold at a price of $133.86 each, and the transaction was executed under a pre-arranged Rule 10b5-1 trading plan.

At what price did Duncan Palmer sell Oshkosh Corp (OSK) shares?

Duncan Palmer sold 505 Oshkosh Corp Common Stock shares at $133.86 per share. This reflects an open-market sale reported on Form 4, providing transparency into the director’s recent trading activity and execution price for this specific transaction.

How many Oshkosh Corp (OSK) shares does Duncan Palmer hold after the sale?

Following the reported sale, Duncan Palmer directly holds 39,684.07 Oshkosh Corp Common Stock shares. This post-transaction balance shows he retains a substantial equity position in the company despite the relatively small 505-share disposition disclosed in the filing.

Why were the Oshkosh Corp (OSK) shares sold under a Rule 10b5-1 plan?

The shares were sold under a Rule 10b5-1 trading plan adopted on February 3, 2026. According to the disclosure, sale proceeds are intended to satisfy Mr. Palmer’s estimated income tax obligations tied to shares he received on May 5, 2026.

Was Duncan Palmer’s Oshkosh Corp (OSK) sale a discretionary trade?

The sale was executed pursuant to a pre-established Rule 10b5-1 plan, indicating it was pre-planned rather than a spur-of-the-moment discretionary trade. Such plans allow insiders to systematically sell shares according to preset instructions over time.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/13/2026 - 11:09 AM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Palmer Duncan

(Last) (First) (Middle)

C/O OSHKOSH CORPORATION

1917 FOUR WHEEL DRIVE

(Street)

OSHKOSH WISCONSIN 54902

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
OSHKOSH CORP [ OSK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/12/2026		S		505(1)	D	$133.86	39,684.07	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

	Ignacio A. Cortina, for Duncan J. Palmer	05/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)