Company: AIP
Filing Date: 2025-12-11
Form Type: S-3
Source: 0001193125-25-316098
Chunk: 53

Company: Arteris, Inc.
Filing Date: 2025-12-11
Form: S-3
Chunk 53
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 of common stock issuable upon exercise of stock options outstanding as of 
 September 30, 2025, having a weighted-average exercise price of $3.33 per share;           |

| • |     | 4,760,502 shares of common stock subject to the settlement of RSUs outstanding as of September 30, 
 2025;                                                                                              |

S-10

| • |     | 218,496 shares of common stock subject to the settlement of RSUs granted subsequent to September 30, 
 2025;                                                                                                |

| • |     | 3,438,175 shares of common stock reserved for future issuance under our 2021 Plan, as well as any automatic 
 increases in the number of shares of our common stock reserved for future issuance under the 2021 Plan; and |

| • |     | 1,882,728 shares of common stock reserved for future issuance under our ESPP, as well as any automatic 
 increases in the number of shares of our common stock reserved for future issuance under the ESPP.     |

In addition, unless we specifically state otherwise, all information in this prospectus supplement reflects and assumes no exercise of outstanding stock options or warrants described above. S-11

PLAN OF DISTRIBUTION

We have entered into a sales agreement with Jefferies, under which we may offer and sell our shares of common stock from time to time through
Jefferies acting as agent. Pursuant to this prospectus supplement, we may offer and sell up to $75,000,000 of our shares of common stock. Sales of our shares of common stock, if any, under this prospectus supplement and the accompanying prospectus
will be made by any method that is deemed to be an “at the market offering” as defined in Rule 415(a)(4) under the Securities Act.

Each time we wish to issue and sell shares of common stock under the sales agreement, we will notify Jefferies of the number of shares to be
issued, the dates on which such sales are anticipated to be made, any limitation on the number of shares to be sold in any one day and any minimum price below which sales may not be made. Once we have so instructed Jefferies, unless Jefferies
declines to accept the terms of such notice, Jefferies has agreed to use its commercially reasonable efforts consistent with its normal trading and sales practices to sell such shares up to the amount specified on such terms. The obligations of
Jefferies