Oshkosh (OSK) Held by Superinvestors
OSHKOSH CORP (OSK) is currently held by 5 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $474.99M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Greenhaven Associates is currently the largest disclosed institutional shareholder of OSK tracked by InsiderSet, reporting ownership valued at approximately $392.71M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $320.42M, representing an estimated loss of -18.41% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed OSK value among the investors covered in this analysis. Major shareholders include Greenhaven Associates, Hancock Classic Value, Atlantic Investment Management, and several other long-term asset managers with concentrated positions in OSHKOSH CORP (OSK).
This page ranks the largest institutional OSK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Greenhaven Associates | Edgar Wachenheim III | 4.53% | 2,558,680 | $392,706,206 | $320,423,496 | -$72,282,710 | -18.41% |
| Hancock Classic Value | Richard Pzena | 0.19% | 415,766 | $63,811,766 | $52,066,376 | -$11,745,390 | -18.41% |
| Atlantic Investment Management | Alex Roepers | 6.69% | 83,700 | $12,846,276 | $10,481,751 | -$2,364,525 | -18.41% |
| Mairs & Power Growth Fund | Andrew R. Adams | 0.05% | 33,183 | $5,092,927 | $4,155,507 | -$937,420 | -18.41% |
| Sequoia Financial Advisors | 0.00% | 3,445 | $528,679 | $431,417 | -$97,262 | -18.40% |
Frequently asked questions about OSK
Who are the largest superinvestors holding OSK?
The largest superinvestors holding OSK in the latest SEC Form 13F filings include Greenhaven Associates, Hancock Classic Value, Atlantic Investment Management, Mairs & Power Growth Fund, and Sequoia Financial Advisors. InsiderSet ranks these superinvestors by their latest reported OSK position.
What does the OSK superinvestors page include?
This page tracks OSK positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. OSHKOSH CORP (OSK) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold OSK?
InsiderSet currently tracks 5 superinvestors reporting OSK holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own OSK.
How much OSK stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $474.99M in OSK holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were OSK superinvestor holdings last updated?
The latest OSK superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor OSK holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its OSK position after the reporting date.
Are superinvestors buying or selling OSK?
Buying and selling can be analyzed by comparing OSK positions across consecutive 13F reporting periods. InsiderSet's OSK Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View OSK ownership changes.
How have superinvestor OSK holdings changed over time?
InsiderSet tracks OSK holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.