# EDGAR Filing Document

**Accession Number:** 0001095981
**File Stem:** 0001193125-25-283935
**Filing Date:** 2025-11
**Character Count:** 13048
**Document Hash:** 021874c543dfee034123a5c63bf7e179
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-283935.hdr.sgml**: 20251117

**ACCESSION NUMBER**: 0001193125-25-283935

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20251117

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251117

**DATE AS OF CHANGE**: 20251117

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PLUS THERAPEUTICS, INC.
- **CENTRAL INDEX KEY:** 0001095981
- **STANDARD INDUSTRIAL CLASSIFICATION:** SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 330827593
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34375
- **FILM NUMBER:** 251489336

**BUSINESS ADDRESS:**
- **STREET 1:** 4200 MARATHON BLVD.
- **STREET 2:** SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78756
- **BUSINESS PHONE:** 737.255.7194

**MAIL ADDRESS:**
- **STREET 1:** 4200 MARATHON BLVD.
- **STREET 2:** SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78756

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CYTORI THERAPEUTICS, INC.
- **DATE OF NAME CHANGE:** 20050712

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MACROPORE INC
- **DATE OF NAME CHANGE:** 20010320

?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): November 17, 2025

## PLUS THERAPEUTICS, INC.

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

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-34375** | **33-0827593** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

#### 2710 Reed Road, Suite 160,

#### Houston, Texas 77051

#### (Address of principal executive offices, with zip code)
(737) 255-7194

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

#### 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 Instructions 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:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br> **Symbol(s)** | **Name of each exchange**<br> **on which registered** |
| Common Stock, par value $0.001 | PSTV | The Nasdaq Capital Market |

---

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 7.01.** | **Regulation FD Disclosure.**  |

---

On November 17, 2025, Plus Therapeutics, Inc. (the "Company") issued a press release announcing that it had received an additional 180-day extension period from the Nasdaq Listing Qualifications Department (the "Nasdaq Staff") to regain compliance with the $1.00 minimum bid price bid requirement set forth in Nasdaq Listing Rule 5550(a)(2) (the "Minimum Bid Price Requirement"), discussed in more detail in Item 8.01 below.

The press release is furnished herewith as Exhibit 99.1 and incorporated by reference herein. The information contained in the press release is being furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liability of that Section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

---

| | |
|:---|:---|
| **Item 8.01** | **Other Events.**  |

---

As previously disclosed, on May 16, 2025, the Company received notice (the "Notification Letter") from the Nasdaq Staff that, because the closing bid price for the Company's common stock had fallen below $1.00 per share for 30 consecutive business days, the Company no longer complied with the Minimum Bid Price Requirement. The Notification Letter stated that the Company had 180 days, or until November 12, 2025, to demonstrate its compliance with the Minimum Bid Price Requirement.

On November 13, 2025, the Company received a second letter from the Nasdaq Staff advising that the Company had been granted an additional 180 calendar days, or until May 11, 2026, to regain compliance with the Minimum Bid Price Requirement, in accordance with Nasdaq Listing Rule 5810(c)(3)(A).

The Company intends to continue to actively monitor the closing bid price of its common stock and will evaluate available options to regain compliance with the Minimum Bid Price Requirement. Specifically, the Company has confirmed to The Nasdaq Stock Market LLC ("Nasdaq") that, if necessary, it will implement a reverse stock split of its outstanding common stock to attempt to regain compliance. If the Company does not regain compliance within the additional compliance period, Nasdaq will provide notice that the Company's common stock will be subject to delisting. The Company would then be entitled to appeal that determination to a Nasdaq hearings panel. There can be no assurance that the Company will regain compliance with the Minimum Bid Price Requirement during the 180-day additional compliance period or maintain compliance with the other Nasdaq listing requirements.

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| | |
|:---|:---|
| **Item 9.01.** | **Financial Statements and Exhibits.**  |

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(d) Exhibits.

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| | |
|:---|:---|
| **Exhibit<br>No.** | **Description** |
| 99.1 | [Press release of the issuer dated November 17, 2025.](d55484dex991.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.

Date: November 17, 2025

---

| | |
|:---|:---|
| **PLUS THERAPEUTICS, INC.** | **PLUS THERAPEUTICS, INC.** |
| By: | /s/ Marc H. Hedrick, M.D. |
|  | Marc H. Hedrick, M.D.<br> President and Chief Executive Officer |

---

## Exhibit 99.1

**Exhibit 99.1** 

**Plus Therapeutics Granted 180-Day Extension to Regain Compliance with Nasdaq's Minimum Bid Price Requirement** 

*No near-term Reverse Stock Split required to meet Bid Price Rule* 

**HOUSTON, Texas, November 17, 2025** – Plus Therapeutics, Inc. (Nasdaq: PSTV) ("Plus" or the "Company"), a clinical-stage pharmaceutical company developing targeted radiotherapeutics with advanced platform technologies for central nervous system (CNS) cancers, today announces it has received an additional 180-day extension period from the Nasdaq Listing Qualifications Department (the "Nasdaq Staff") to regain compliance with the $1.00 minimum bid price requirement set forth in Nasdaq Listing Rule 5550(a)(2) (the "Minimum Bid Price Requirement").

The extension notice has no immediate effect on the continued listing status of the Company's common stock on the Nasdaq Capital Market ("Nasdaq") under the symbol "PSTV." The Company has until May 11, 2026, to meet the Minimum Bid Price Requirement. If at any time during the additional 180-calendar-day extension, the closing bid price of the common stock is at least $1.00 per share for a minimum of 10 consecutive business days, the Nasdaq Staff will provide the Company with a written confirmation of compliance, and the matter will be closed.

There can be no assurance that the Company will be able to regain compliance with the Minimum Bid Price Requirement, even if it maintains compliance with the other listing requirements.

**About Plus Therapeutics** 

Headquartered in Houston, Texas, Plus Therapeutics, Inc. is a clinical-stage pharmaceutical company developing targeted radiotherapeutics for difficult-to-treat cancers of the central nervous system with the potential to enhance clinical outcomes. Combining image-guided local beta radiation and targeted drug delivery approaches, the Company is advancing a pipeline of product candidates with lead programs in leptomeningeal metastases (LM) and recurrent glioblastoma (GBM). The Company has built a supply chain through strategic partnerships that enable the development, manufacturing, and future potential commercialization of its products. For more information, visit <u>https://www.plustherapeutics.com</u>.

**About CNSide Diagnostic, LLC** 

CNSide Diagnostics, LLC is a wholly owned subsidiary of Plus Therapeutics, Inc. that develops and commercializes proprietary laboratory-developed tests, such as CNSide®, designed to identify tumor cells that have metastasized to the central nervous system in patients with carcinomas and melanomas. The CNSide® CSF Assay Platform enables quantitative analysis of the cerebrospinal fluid that informs and improves the management of patients with leptomeningeal metastases.

**Forward-Looking Statements** 

This press release contains statements that may be deemed "forward-looking statements" within the meaning of U.S. securities laws, including the Company's ability to maintain compliance with the Minimum Bid Price Requirement and other Nasdaq's continued listing rules. All statements in this press release other than statements of historical fact are forward-looking statements. These forward-looking statements may be identified by future verbs, as well as terms such as "expect," "will," "potential," "anticipating," "planning," and similar expressions or the negatives thereof. Such statements are based upon certain assumptions and assessments made by management in light of their experience and their perception of historical trends, current conditions, expected future developments and other factors they believe to be appropriate. The forward-looking statements included in this press release could differ materially from those expressed or implied by these forward-looking statements because of risks, uncertainties, and other factors that include, but are not limited to, the following: the price and volatility of the Company's common stock; the Company's liquidity and capital resources and its ability to raise additional cash; market conditions, product performance, litigation or potential litigation; and, competition within the cancer diagnostics and therapeutics field. This list of risks, uncertainties, and other factors is not complete. The Company discusses some of these matters more fully, as well as certain risk factors that could affect the Company's business, financial condition, results of operations, and prospects, in its reports filed with the SEC, including the Company's annual report on Form 10-K for the fiscal year ended December 31, 2024, quarterly reports on Form 10-Q, and current reports on Form 8-K. These filings are available for review through the SEC's website at www.sec.gov. Any or all forward-looking statements the Company makes may turn out to be wrong and can be affected by inaccurate assumptions the Company might make or by known or unknown risks, uncertainties, and other factors, including those identified in this press release. Accordingly, you should not place undue reliance on the forward-looking statements made in this press release, which speak only as of its date. There may be events in the future that the Company is unable to predict, or over which it has no control, and its

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business, financial condition, results of operations and prospects may change in the future. The Company assumes no responsibility to update or revise any forward-looking statements to reflect events, trends or circumstances after the date they are made unless the Company has an obligation under U.S. federal securities laws to do so.

**Investor Contact** 

CORE IR

investor@plustherapeutics.com