# EDGAR Filing Document

**Accession Number:** 0001297184
**File Stem:** 0001297184-26-000038
**Filing Date:** 2026-6
**Character Count:** 7894
**Document Hash:** 615496b5ce8e6cabc9c012ac7fd1c93a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001297184-26-000038.hdr.sgml**: 20260603

**ACCESSION NUMBER**: 0001297184-26-000038

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260601

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260603

**DATE AS OF CHANGE**: 20260603

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Amphastar Pharmaceuticals, Inc.
- **CENTRAL INDEX KEY:** 0001297184
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 330702205
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36509
- **FILM NUMBER:** 261060823

**BUSINESS ADDRESS:**
- **STREET 1:** 11570 SIXTH STREET
- **CITY:** RANCHO CUCAMONGA
- **STATE:** CA
- **ZIP:** 91730
- **BUSINESS PHONE:** 909-980-9484

**MAIL ADDRESS:**
- **STREET 1:** 11570 SIXTH STREET
- **CITY:** RANCHO CUCAMONGA
- **STATE:** CA
- **ZIP:** 91730

?xml version='1.0' encoding='ASCII'? Amphastar Pharmaceuticals, Inc._June 1, 2026

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

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**FORM 8-K** 

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**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 1, 2026**

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## Amphastar Pharmaceuticals, Inc.
**(Exact name of Registrant as specified in its charter)** 

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| | | |
|:---|:---|:---|
| **Delaware** | **001-36509** | **33-0702205** |
| **(State or other jurisdiction of**<br>**incorporation)** | **(Commission**<br>**File Number)** | **(IRS Employer**<br>**Identification No.)** |

---

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| | |
|:---|:---|
| **11570 6**<sup>th</sup> **Street** |  |
| **Rancho Cucamonga, CA** | **91730** |
| **(Address of principal executive offices)** | **(zip code)** |

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 **(909) 980-9484**

**(Registrant's telephone number, including area code)**

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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:

☐ 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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| | | |
|:---|:---|:---|
| &nbsp;&nbsp;Title of each class | &nbsp;&nbsp;Trading Symbol(s) | &nbsp;&nbsp;Name of each exchange on which registered |
| Common Stock, par value $0.0001 per share | AMPH | The NASDAQ Stock Market LLC |

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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 5.07.** **Submission of Matters to a Vote of Security Holders.**

The stockholders of the Company voted on the following items at the Annual Meeting, each of which is described in more detail in the Company's definitive proxy statement filed with the SEC on April 13, 2026:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. To elect three Class I directors to serve until the Company's 2029 annual meeting of stockholders and until each such director's successor is elected and qualified or until such director's earlier death, resignation or removal;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. To ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for its fiscal year ending December 31, 2026;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. To approve, on an advisory basis, the compensation of the Company's named executive officers; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. To approve, on an advisory basis, the frequency of future stockholder advisory votes on the Company's named executive officer compensation.

The voting results for the proposals are detailed below.

***1. Election of Directors***

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| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;**Nominee** | &nbsp;&nbsp;**For** | &nbsp;&nbsp;**Against** | &nbsp;&nbsp;**Abstained** | &nbsp;&nbsp;**Broker Non-votes** |
| &nbsp;&nbsp;David Gaugh | &nbsp;&nbsp;35242863 | &nbsp;&nbsp;209084 | &nbsp;&nbsp;25045 | &nbsp;&nbsp;4439978 |
| &nbsp;&nbsp;William J. Peters | &nbsp;&nbsp;23652131 | &nbsp;&nbsp;11785772 | &nbsp;&nbsp;39089 | &nbsp;&nbsp;4439978 |
| &nbsp;&nbsp;Jacob Liawatidewi | &nbsp;&nbsp;23224791 | &nbsp;&nbsp;12212988 | &nbsp;&nbsp;39213 | &nbsp;&nbsp;4439978 |

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Each director nominee was duly elected to serve until the 2029 annual meeting of stockholders and until his or her successor is duly elected and qualified or until such director's earlier death, resignation or removal.

***2. Ratification of Appointment of Independent Registered Public Accounting Firm***

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| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;**For** | &nbsp;&nbsp;**Against** | &nbsp;&nbsp;**Abstained** | &nbsp;&nbsp;**Broker Non-votes** |
| &nbsp;&nbsp;39,179,786 | &nbsp;&nbsp;684,828 | &nbsp;&nbsp;52,356 | &nbsp;&nbsp;N/A |

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The stockholders ratified the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026.

***3. Advisory Vote on the Compensation of our Named Executive Officers***

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| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;**For** | &nbsp;&nbsp;**Against** | &nbsp;&nbsp;**Abstained** | &nbsp;&nbsp;**Broker Non-votes** |
| &nbsp;&nbsp;32,585,908 | &nbsp;&nbsp;2,779,281 | &nbsp;&nbsp;111,803 | &nbsp;&nbsp;4,439,978 |

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The stockholders approved, on a non-binding basis, the compensation of the Company's named executive officers.

***4. Advisory Vote on the Frequency of Future Stockholder Advisory Votes on Named Executive Officer Compensation***

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| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;**1 Year** | &nbsp;&nbsp;**2 Years** | **3 Years** | &nbsp;&nbsp;**Abstained** | &nbsp;&nbsp;**Broker Non-votes** |
| &nbsp;&nbsp;33,816,071 | &nbsp;&nbsp;12,329 | 1,624,016 | &nbsp;&nbsp;24,576 | &nbsp;&nbsp;4,439,978 |

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The stockholders approved, on a non-binding advisory basis, that they were in favor of one year as the frequency of holding stockholder advisory votes on the compensation of the Company's named executive officers. In accordance with the voting results for this proposal, the board of directors of the Company has determined that the Company will hold future stockholder advisory votes on the compensation of the Company's named executive officers every year. The next required advisory vote on the frequency of future stockholder advisory votes on the compensation of the Company's named executive officers will take place no later than at the Company's 2032 annual meeting of stockholders.

**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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| | |
|:---|:---|
|  | AMPHASTAR PHARMACEUTICALS, INC. |
| Date: June 3, 2026 |  |
|  | By: /s/ William J. Peters |
|  | William J. Peters |
|  | Chief Financial Officer and Executive Vice President |

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