Shimmick Corp. (SHIM) trims ATM registration to $4.99M with Roth Capital

Rhea-AI Filing Summary

Shimmick Corporation amended its ATM shelf to register up to $4,986,750 of Common Stock for sale pursuant to an At the Market Offering Agreement with Roth Capital Partners. The supplement reduces the previously registered $7,800,000 amount and continues to permit sales at the market as defined under Rule 415.

The supplement states no shares have been sold under the Prospectus. It reports a last reported sale price of $4.03 per share and an aggregate market value of Common Stock held by non-affiliates of $33.4 million, calculated from 8,278,806 shares as of May 21, 2026. The ATM is subject to the Form S-3 placement limit described in General Instruction I.B.6.

Insights

Capital Markets Analyst

ATM reduced to $4.99M; no sales yet under the prospectus.

The prospectus supplement amends the existing at-the-market shelf by lowering the registered capacity to $4,986,750 from $7,800,000. It confirms that the Company has not sold any shares under the Prospectus and names Roth Capital Partners as sales agent under the ATM Agreement dated September 8, 2025.

Practical dependencies include the General Instruction I.B.6 cap tied to the aggregate market value of non-affiliate shares; the supplement states that cap mechanics apply while the non-affiliate market value remains below $75 million. Cash-flow treatment and specific timing of any sales are not provided in the excerpt.

Key Figures

Registered ATM capacity: $4,986,750 Previously registered amount: $7,800,000 Last reported sale price: $4.03 per share +2 more

5 metrics

Registered ATM capacity $4,986,750 updated prospectus supplement

Previously registered amount $7,800,000 initial amount under the Prospectus

Last reported sale price $4.03 per share Nasdaq closing price on May 21, 2026

Non-affiliate market value $33.4 million aggregate market value held by non-affiliates as of May 21, 2026

Shares used in market-value calc 8,278,806 shares shares of outstanding common stock held by non-affiliates as of May 21, 2026

Key Terms

At the Market Offering Agreement, General Instruction I.B.6 of Form S-3, aggregate market value of outstanding Common Stock held by non-affiliates

3 terms

At the Market Offering Agreement financial

"acting as sales agent pursuant to that certain At the Market Offering Agreement"

An at-the-market offering agreement is a contract that lets a company sell newly issued shares directly into the open market through a broker, at whatever price the stock is trading at that moment. For investors this matters because it can increase the number of shares available (which may dilute existing ownership) while providing a flexible, often faster way for the company to raise cash without fixing a price, similar to a vendor selling small batches at current market stalls rather than setting a single fixed price.

General Instruction I.B.6 of Form S-3 regulatory

"Pursuant to General Instruction I.B.6 of Form S-3, in no event will we sell the shelf securities"

aggregate market value of outstanding Common Stock held by non-affiliates financial

"aggregate market value of our outstanding Common Stock held by non-affiliates was approximately $33.4 million"

Offering Details

ATM

Offering

Offering Type ATM

Filed Pursuant to Rule 424(b)(5)
Registration No. 333-288513

PROSPECTUS SUPPLEMENT

(To Prospectus dated July 10, 2025)

Up to $4,986,750 of Common Stock

This prospectus supplement updates and amends certain information contained in the prospectus supplement, dated September 8, 2025 and the base prospectus, dated July 10, 2025 (together, the “Prospectus”), relating to the sale of shares of our common stock, par value $0.01 per share (the “Common Stock”) by Shimmick Corporation (the “Company”) from time to time to or through Roth Capital Partners, LLC (the “Sales Agent”), acting as sales agent pursuant to that certain At the Market Offering Agreement, dated September 8, 2025, by and between the Company and the Sales Agent (the “ATM Agreement”), in sales deemed to be “at the market offerings” as defined in Rule 415 promulgated under the Securities Act of 1933, as amended.

This prospectus supplement should be read in conjunction with the Prospectus and is qualified by reference to the Prospectus, except to the extent that the information presented herein supersedes the information contained in the Prospectus. This prospectus supplement is not complete without, and may only be delivered or used in connection with, the Prospectus, including any amendments or supplements thereto.

Under the Prospectus, we initially registered up to $7,800,000 of the Common Stock for offer and sale pursuant to the ATM Agreement. We have not sold any shares of Common Stock under the Prospectus. We are filing this prospectus supplement to amend the Prospectus to reduce the amount of Common Stock registered under the Prospectus to $4,986,750.

Investing in our common stock involves risks. See the “Risk Factors” sections on page 6 of the base prospectus and in the documents incorporated by reference into this prospectus supplement concerning factors you should consider before investing in our common stock.

We are an “emerging growth company” and a “smaller reporting company” as such terms are defined under the federal securities laws and, as such, are subject to certain reduced public company reporting requirements.

Our Common Stock is listed on the Nasdaq under the symbol “SHIM.” On May 21, 2026, the last reported sale price of our Common Stock on Nasdaq was $4.03 per share. As of May 21, 2026, the aggregate market value of our outstanding Common Stock held by non-affiliates was approximately $33.4 million, which was calculated based on 8,278,806 shares of outstanding common stock held by non-affiliates multiplied by a price per share of $4.03, the closing price of our Common Stock on that date. Pursuant to General Instruction I.B.6 of Form S-3, in no event will we sell the shelf securities in a public primary offering with a value exceeding more than one-third of the aggregate market value of our Common Stock held by non-affiliates in any 12-month period immediately prior to the date of any such offering, so long as the aggregate market value of our outstanding Common Stock held by non-affiliates remains below $75 million. During the 12 calendar months prior to and including the date of this prospectus supplement, we have not offered or sold any securities pursuant to General Instruction I.B.6 of Form S-3.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus supplement. Any representation to the contrary is a criminal offense.

Roth Capital Partners

The date of this prospectus supplement is May 22, 2026.

FAQ

What change did SHIM make to its ATM shelf?

SHIM reduced the registered amount for its ATM program to $4,986,750. This prospectus supplement replaces the prior registered amount of $7,800,000 under the Prospectus.

Has Shimmick sold any shares under this prospectus?

No. The supplement states that Shimmick has not sold any shares of Common Stock under the Prospectus. The ATM capacity was reduced before any sales occurred.

Who is the sales agent for SHIM's at-the-market offering?

The sales agent named is Roth Capital Partners, LLC, acting under the At the Market Offering Agreement dated September 8, 2025, for sales deemed at the market under Rule 415.

What market-value limit affects SHIM's Form S-3 selling capacity?

Per General Instruction I.B.6 of Form S-3, public primary offerings cannot exceed one-third of the aggregate market value of Common Stock held by non-affiliates in a 12-month period while that market value is below $75 million.

What price and market-value figures does the supplement report?

The supplement reports a last reported sale price of $4.03 per share and an aggregate market value held by non-affiliates of $33.4 million, based on 8,278,806 shares as of May 21, 2026.