Company: CPSH
Filing Date: 2025-10-06
Form Type: 424B5
Source: 0001437749-25-030558
Chunk: 0

Company: CPS TECHNOLOGIES CORP/DE/
Filing Date: 2025-10-06
Form: 424B5
Chunk 0
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Filed Pursuant to Rule 424(b)(5)

Registration No. 333-282266

The information in this preliminary prospectus supplement and the accompanying prospectus is not complete and may be changed. A registration statement relating to the securities has become effective under the Securities Act of 1933, as amended. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted.

<div align='center'>Subject to completion, dated October 6, 2025</div>

PRELIMINARY PROSPECTUS SUPPLEMENT
(To Prospectus dated October 17, 2024)

<div align='center'>CPS TECHNOLOGIES CORP.

Common Stock</div>

We are offering shares of our common stock, par value $0.01 per share (“common stock”). The purchase price for each is $ .

Our common stock is listed on Nasdaq Capital Market, or Nasdaq, under the symbol “CPSH.” On October 3, 2025, the last reported sale price of shares of our common stock on the Nasdaq Capital Market was $3.41per share.

|                                           |     | Per Share |     | Total |
|:------------------------------------------|:----|:----------|:----|:------|
| Public offering price                     |     | $         |     | $     |
| Underwriting discounts and commissions(1) |     | $         |     | $     |
| Proceeds, before expenses, to us          |     | $         |     | $     |

| (1) | See “Underwriting” for additional disclosure regarding the underwriting discounts and commissions and estimated offering expenses. |

We intend to grant the underwriter an option for a period of up to 45 days from the date of this prospectus supplement to purchase up to ____ additional shares of our common stock at the public offering price, less the underwriting discounts and commissions.

One or more of our board members and executive officers may purchase (directly or through related entities) shares of common stock in this offering at the public offering price. Because indications of interest are not a binding agreement or commitment to purchase, these individualsmay determine to purchase shares in this offering, or the underwriter may determine to sell or not sell shares to these individuals.

Investing in our common stock involves a high degree of risk. You should carefully review the risks and uncertainties referenced under