Vanguard holds 6.79% of Oshkosh Corp (OSK) — 4.26M shares reported

Rhea-AI Filing Summary

Oshkosh Corp reports a Schedule 13G showing Vanguard Portfolio Management beneficially owned 6.79% of common stock, equal to 4,258,612 shares as of 03/31/2026. The filing states Vanguard has sole dispositive power over 4,258,612 shares and sole voting power for 12,347 shares. The form is signed on 04/29/2026 by a Vanguard official.

Insights

Institutional Ownership Analyst

Vanguard holds a 6.79% passive stake in Oshkosh (OSK) per the Schedule 13G.

Vanguard Portfolio Management reports beneficial ownership of 4,258,612 shares as of 03/31/2026, with dispositive control but limited voting power listed at 12,347 shares. This filing characterizes a large, likely passive position under Schedule 13G disclosure conventions.

Retention or changes in this position will appear in subsequent ownership disclosures; timing of any trading activity is not provided in the excerpt.

Corporate Governance Specialist

The filing clarifies voting vs dispositive authority and identifies affiliated Vanguard entities.

The submission explains dispositive power exercised through Vanguard Portfolio Management and affiliates, noting holdings include shares held for Vanguard funds and managed accounts. The filing emphasizes that other Vanguard subsidiaries not aggregated here may hold additional shares.

For governance impact, the low sole voting power figure suggests limited direct voting influence despite sizable economic ownership.

Key Figures

Beneficially owned shares: 4,258,612 shares Percent of class: 6.79% Sole voting power: 12,347 shares +1 more

4 metrics

Beneficially owned shares 4,258,612 shares reported as of 03/31/2026

Percent of class 6.79% percent of Oshkosh common stock reported on Schedule 13G

Sole voting power 12,347 shares sole power to vote or direct the vote

Sole dispositive power 4,258,612 shares sole power to dispose or direct disposition

Key Terms

Schedule 13G, Beneficial ownership, Dispositive power

3 terms

Schedule 13G regulatory

"Vanguard Portfolio Management files a Schedule 13G reporting beneficial ownership"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficial ownership financial

"Amount beneficially owned: 4258612 (b) | Percent of class: 6.79 %"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 4258612"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Oshkosh Corp

(Name of Issuer)

Common Stock

(Title of Class of Securities)

688239201

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 688239201

1

Names of Reporting Persons

Vanguard Portfolio Management

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 12,347.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,258,612.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,258,612.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.79 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard Portfolio Management LLC and the following affiliates of Vanguard Portfolio Management LLC or business divisions of such affiliates: Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC. This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Portfolio Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power. This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Portfolio Management LLC, or business divisions of such subsidiaries whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Oshkosh Corp
(b)	Address of issuer's principal executive offices: 1917 Four Wheel Drive, Oshkosh, WI, 54902
Item 2.
(a)	Name of person filing: Vanguard Portfolio Management
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 688239201
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4258612
(b)	Percent of class: 6.79 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 12347
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4258612
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Vanguard Portfolio Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Vanguard Portfolio Management

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	04/29/2026

FAQ

How many Oshkosh (OSK) shares does Vanguard Portfolio Management report owning?

Vanguard reports beneficial ownership of 4,258,612 shares. The Schedule 13G lists this figure as representing 6.79% of Oshkosh's common stock as of 03/31/2026, with dispositive power claimed over all those shares.

Does Vanguard have voting control over its Oshkosh (OSK) holdings?

Vanguard reports sole voting power for 12,347 shares and sole dispositive power for 4,258,612 shares. The filing separates voting authority from dispositive authority and shows limited voting power relative to economic ownership.

What type of SEC filing did Vanguard submit for its Oshkosh stake?

Vanguard submitted a Schedule 13G reporting beneficial ownership. Schedule 13G is used for passive investors to disclose holdings, and the form here was signed on 04/29/2026 reflecting ownership as of 03/31/2026.

Are Vanguard's Oshkosh holdings held on behalf of other parties?

Yes. The filing states Vanguard Portfolio Management exercises dispositive power over shares held by Vanguard funds and managed accounts, and that affiliates like Vanguard Fiduciary Trust Company and Vanguard Global Advisers are involved in managing those holdings.