Company: HRTX
Filing Date: 2025-08-15
Form Type: 8-A12B
Source: 0000950170-25-109236
Chunk: 2

Company: HERON THERAPEUTICS, INC. /DE/
Filing Date: 2025-08-15
Form: 8-A12B
Chunk 2
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 (the “Preferred Stock”), at a price of $7.00 per one one-thousandth of a share of Preferred Stock, subject to certain anti-dilution adjustments (the “Purchase Price”).

One Right will be distributed to stockholders of the Company for each share of Common Stock owned of record by them at the close of business on August 15, 2025. As long as the Rights are attached to the Common Stock, the Company will issue one Right with each new share of Common Stock so that all such shares will have attached Rights. The Company has reserved 400,000 shares of Preferred Stock for issuance upon exercise of the Rights.

Transfer, “Flip In” and Exercise of Purchase Rights

Until the earlier to occur of (i) the close of business on the tenth business day following a public announcement that a person or group has acquired, or obtained the right to acquire, beneficial ownership of 4.99% or more of the Common Stock (an “Acquiring Person”) or (ii) the close of business on the tenth business day following the commencement or announcement of an intention to make a tender offer or exchange offer the consummation of which would result in the beneficial ownership by a person or group of 4.99% or more of the Common Stock (the earlier of (i) and (ii) being called the “Distribution Date”), the Rights will be evidenced, with respect to Common Stock certificates outstanding as of the Record Date, by such Common Stock certificates, or, with respect to uncertificated Common Stock registered in book entry form, by notation in book entry, in either case together with a copy of the Summary of Rights attached asExhibit Cto the Plan. The Board can postpone the Distribution Date in

certain circumstances. Shares held by persons participating in a group are deemed to be beneficially owned by all persons treated as the same entity for purposes of Section 382 of the Code.

The Plan provides that any person who beneficially owned 4.99% or more of the Common Stock as of the first public announcement of the adoption of the Plan (each an “Existing Holder”) shall not be deemed to be an “Acquiring Person” for purposes of the Plan unless the Existing Holder becomes the beneficial owner of one or more additional shares of Common Stock, other than pursuant to (i) a dividend or distribution paid or made by the Company on the outstanding Common Stock, (ii) a split or subdivision of the outstanding Common Stock, (iii) the acquisition of Common Stock