# EDGAR Filing Document

**Accession Number:** 0000818033
**File Stem:** 0001193125-26-253851
**Filing Date:** 2026-6
**Character Count:** 11624
**Document Hash:** c3cd300878a38ef242064c7a455c14c5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-253851.hdr.sgml**: 20260602

**ACCESSION NUMBER**: 0001193125-26-253851

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 10

**CONFORMED PERIOD OF REPORT**: 20260602

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260602

**DATE AS OF CHANGE**: 20260602

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HERON THERAPEUTICS, INC. /DE/
- **CENTRAL INDEX KEY:** 0000818033
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 942875566
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33221
- **FILM NUMBER:** 261057688

**BUSINESS ADDRESS:**
- **STREET 1:** 4242 CAMPUS POINT COURT, SUITE 200
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92121
- **BUSINESS PHONE:** 8582514400

**MAIL ADDRESS:**
- **STREET 1:** 4242 CAMPUS POINT COURT, SUITE 200
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92121

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AP PHARMA INC /DE/
- **DATE OF NAME CHANGE:** 20010511

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ADVANCED POLYMER SYSTEMS INC /DE/
- **DATE OF NAME CHANGE:** 19920703

?xml version='1.0' encoding='ASCII'? 8-K

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM** 8-K

**CURRENT REPORT** 

**Pursuant to Section 13 or 15(d)** 

**of the Securities Exchange Act of 1934** 

**Date of Report (Date of earliest event reported):** June 2, 2026

Heron Therapeutics, Inc.

**(Exact name of registrant as specified in its charter)** 

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| | | |
|:---|:---|:---|
| Delaware | 001-33221 | 94-2875566 |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission**<br>**File Number)** | **(I.R.S. Employer**<br>**Identification No.)** |

---

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| | |
|:---|:---|
| 25 Fenton Main Street**,** Suite 300**,** Cary**,** NC | 27511 |
| **(Address of principal executive offices)** | **(Zip Code)** |

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**Registrant's telephone number, including area code** (858) 251-4400

**N/A**

**(Former name or former address, if changed since last report)** 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock, par value $0.01 per share | HRTX | **The** Nasdaq **Capital Market** |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 8.01 Other Events.**

As previously disclosed, on December 11, 2023, Heron Therapeutics, Inc. ("Company") received a Paragraph IV notice of certification (the "Slayback Notice") from Slayback Pharma LLC ("Slayback") (now owned by Azurity Pharmaceuticals, Inc. ("Azurity")) advising that Slayback had submitted a new drug application ("NDA") under Section 505(b)(2) of the Federal Food, Drug, and Cosmetic Act to the FDA seeking approval to manufacture, use or sell a generic version of CINVANTI<sup>®</sup> in the U.S. ("Slayback's NDA") prior to the expiration of the patents listed in the Orange Book. The Slayback Notice alleged that the CINVANTI Orange Book patents are invalid, unenforceable and/or will not be infringed by the commercial manufacture, use or sale of the generic product described in Slayback's NDA.

On January 24, 2024, the Company filed a complaint for patent infringement of the CINVANTI Orange Book patents against Slayback and a related entity in the U.S. District Court for the District of New Jersey in response to Slayback's NDA filing. The complaint sought, among other relief, equitable relief enjoining Slayback from infringing those patents. On July 2, 2024, the U.S. District Court for the District of New Jersey granted Slayback's motion to transfer this matter to the U.S. District Court for the District of Delaware. On December 12, 2024, the Company filed a complaint against Slayback, Azurity, and related entities in the U.S. District Court for District of Delaware (the "District Court") for patent infringement of U.S. Patent Nos. 12,115,254 and 12,115,255. On May 23, 2025, the Company filed an amended complaint against Slayback, Azurity and related entities adding an allegation of patent infringement of U.S. Patent No. 12,290,520. On September 16, 2025, the parties entered into a stipulation (Case No. 24-1363, D.I. 119) limiting the issues for trial. On November 17, 2025, the parties commenced a two-day bench trial centered on Azurity's §112 defenses of claims from U.S. Patent Nos. 12,115,255 and 12,290,520 that cover CINVANTI. On February 6, 2026, the post-trial briefing was completed, and, on March 24, 2026, the Court held closing arguments.

On June 2, 2026, the Company issued a press release announcing that the District Court issued a decision on June 1, 2026, holding that the asserted claims of Heron's U.S. Patent Nos. 12,115,255 and 12,290,520 are invalid. This decision has no impact on any prior settlement agreement related to CINVANTI (aprepitant) injectable emulsion or APONVIE<sup>®</sup>(aprepitant) injectable emulsion. Heron intends to appeal the decision to the United States Court of Appeals for the Federal Circuit, a court that specializes in patent disputes. A copy of the press release is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

This Current Report on Form 8-K contains "forward-looking statements" as defined by the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in the forward-looking statements as a result of these risks and uncertainties. Examples of forward-looking statements include, among others, statements regarding whether the Company appeals the decision and its ability to obtain a stay of market entry. Important factors that could cause actual results to differ materially from those in the forward-looking statements are set forth in

in the Company's most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q, and in the Company's other reports filed with the Securities and Exchange Commission, including under the caption "Risk Factors." The Company undertakes no obligation to update or revise these statements except as may be required by law.

**Item 9.01 Financial Statements and Exhibits.** 

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| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| 99.1 | [<u>Press Release, dated June 2, 2026</u>](hrtx-ex99_1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

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**SIGNATURES** 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | |
|:---|:---|
|  | Heron Therapeutics, Inc. |
| Date: June 2, 2026 | /s/ Ira Duarte |
|  | Ira Duarte<br>Executive Vice President, Chief Financial Officer |

---

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## Exhibit 99.1

**Exhibit 99.1**

**U.S. District Court Issues Decision Regarding CINVANTI**<sup>®</sup> **Patents**

— After Reviewing the Ruling, Heron Believes It has Substantial Grounds for Obtaining Reversal in an Appeal —

CARY, N.C., June 2, 2026 (GLOBE NEWSWIRE) - Heron Therapeutics, Inc. (Nasdaq: HRTX) ("Heron" or the "Company"), a commercial-stage biotechnology company, today announced that the U.S. District Court for the District of Delaware issued a decision in the patent litigation between Heron and Azurity Pharmaceuticals, Inc., Azurity Pharmaceuticals India LLP f/k/a Slayback Pharma India LLP, and Slayback Pharma LLC ("Azurity"), with respect to CINVANTI<sup>®</sup> (aprepitant) injectable emulsion, holding that the asserted claims of Company's U.S. Patent Nos. 12,115,255 and 12,290,520 are invalid. This decision has no impact on any prior settlement agreement related to CINVANTI<sup>®</sup> (aprepitant) injectable emulsion or APONVIE<sup>®</sup>(aprepitant) injectable emulsion. Heron intends to appeal the decision to the United States Court of Appeals for the Federal Circuit, a court that specializes in patent disputes.

"We are disappointed with this initial result of the litigation and will vigorously pursue our appeal and all available remedies, including equitable relief if necessary, as we continue to defend our intellectual property rights," said Craig Collard, Chief Executive Officer of Heron.

**About Heron Therapeutics, Inc.**

Heron Therapeutics, Inc. is a commercial-stage biotechnology company focused on improving the lives of patients by developing and commercializing therapeutic innovations that improve medical care. Our advanced science, patented technologies, and innovative approach to drug discovery and development have allowed us to create and commercialize a portfolio of products that aim to advance the standard-of-care for acute care and oncology patients. For more information, visit www.herontx.com.

**Forward-looking Statements**

This news release contains "forward-looking statements" as defined by the Private Securities Litigation Reform Act of 1995. Heron cautions readers that forward-looking statements are based on management's expectations and assumptions as of the date of this news release and are subject to certain risks and uncertainties that could cause actual results to differ materially. Therefore, you should not place undue reliance on forward-looking statements. Examples of forward-looking statements include, among others, statements we make regarding whether Heron appeals the decision and Heron's ability to obtain a stay of market entry. Important factors that could cause actual results to differ materially from those in the forward-looking statements are set forth in our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q, and in our other reports filed with the Securities and Exchange Commission, including under the caption "Risk Factors." Forward-looking statements reflect our analysis only on their stated date, and Heron takes no obligation to update or revise these statements except as may be required by law.

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**Investor Relations and Media Contact:**

Ira Duarte<br>Executive Vice President, Chief Financial Officer<br>Heron Therapeutics, Inc.

iduarte@herontx.com

858-251-4400

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