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SCHEDULE 13D/A Filed 2026-06-15 Event 2026-06-11 SEC 0001493152-26-028722 →

Albion River Management LLC NATIONAL PRESTO INDUSTRIES INC NPK

Stake: 4.01% Shares: 287,034 CUSIP: 637215104 Class: Common Stock, $1 par value

Item 4 — Purpose of Transaction

Item 4 of the Original Schedule 13D is hereby amended and restated in its entirety to read as follows: The response to Item 3 of this Amendment is incorporated herein by reference. The Reporting Persons initially acquired 362,250 shares of Common Stock over which they exercised beneficial ownership in the belief that the shares of Common Stock were undervalued and were an attractive investment opportunity. Subsequent to that initial acquisition, the Reporting Persons acquired approximately 33,000 additional shares of Common Stock in the open market, with the last such purchase occurring in January 2026, bringing the Reporting Persons' aggregate beneficial ownership to 395,080 shares of Common Stock at that time. The Reporting Persons intended to engage, and did engage, in discussions with the Issuer regarding strategy, including a meeting with the Issuer in late March 2026. The Reporting Persons thereafter sold a portion of their shares of Common Stock in the open market. Such transactions are included herein on Exhibit A. Except as stated in response to this Item 4, the Reporting Persons have no current plans or proposals with respect to the Issuer or its securities enumerated in subparagraphs (a) - (j) of this Item 4 to Schedule 13D promulgated under the Act. Notwithstanding the foregoing, the Reporting Persons may determine, from time to time in the future, based on market and general economic conditions, the business affairs and financial conditions of the Issuer, the capital requirements of the Fund (or other Reporting Persons), the availability of securities at favorable prices and other alternative investment opportunities available to the Reporting Persons, and other factors that the Reporting Persons may deem relevant, to acquire additional shares of Common Stock and/or other equity, debt, notes, instruments or other securities of the Issuer (collectively, "Securities") in the open market, in privately negotiated transactions, or otherwise, or to sell some or all of the Securities they now hold or hereafter acquire as set forth above or otherwise. The Reporting Persons reserve the right to change their intention with respect to, and pursue plans or proposals that relate to or could result in, any and all matters referred to in subparagraphs (a) - (j) of this Item 4 to Schedule 13D promulgated under the Act.

Cross-References

Insider Activity (last 365d)
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Issuer Cluster
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Filer Track Record
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Short Interest · settle 2026-07-15
DTC 3.49
292,627 shares short · -1.7% vs prior

Post-Filing Returns · since 2026-06-11 on NPK

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+30 days
-1.0%
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+180 days

Anchor price 124.23 on closest trading day on/after 2026-06-11. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

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