Form 8-K
8-K — PLUS THERAPEUTICS, INC.
Accession: 0001193125-26-227059
Filed: 2026-05-15
Period: 2026-05-14
CIK: 0001095981
SIC: 3841 (SURGICAL & MEDICAL INSTRUMENTS & APPARATUS)
Item: Submission of Matters to a Vote of Security Holders
Documents
8-K — pstv-20260514.htm (Primary)
XML — IDEA: XBRL DOCUMENT (R1.htm)
8-K
8-K (Primary)
Filename: pstv-20260514.htm · Sequence: 1
8-K
false000109598100010959812026-05-142026-05-14
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): May 14, 2026
PLUS THERAPEUTICS, INC.
(Exact name of Registrant as Specified in Its Charter)
Delaware
001-34375
33-0827593
(State or Other Jurisdiction
of Incorporation)
(Commission File Number)
(IRS Employer
Identification No.)
6420 LEVIT GREEN BOULEVARD
Suite 310
Houston, Texas
77021
(Address of Principal Executive Offices)
(Zip Code)
Registrant’s Telephone Number, Including Area Code: (737) 255-7194
(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:
☐
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
Symbol(s)
Name of each exchange on which registered
Common Stock, par value $0.001 per share
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. ☐
Item 5.07 Submission of Matters to a Vote of Security Holders.
The 2026 Annual Meeting of Stockholders of Plus Therapeutics, Inc. (the “Company”) was held on May 14, 2026 (the “Annual Meeting”). At the Annual Meeting, the Company’s stockholders voted on four proposals, as described in the Company’s definitive proxy statement on Schedule 14A filed with the Securities and Exchange Commission on March 31, 2026 (the “Proxy Statement”). All share amounts disclosed herein are presented before giving effect to the Company’s 1-for-25 reverse stock split effective on April 2, 2026.
The Company had 171,550,698 shares of common stock issued and outstanding at the close of business on March 18, 2026, the record date for eligibility to vote at the Annual Meeting. The holders of 64,857,321 shares of the Company’s issued and outstanding common stock were represented in person virtually or represented by valid proxy at the Annual Meeting, constituting a quorum.
The vote results detailed below represent final results as certified by the inspector of elections.
Proposal No. 1 - Election of Directors.
The Company’s stockholders elected the following persons, who were listed in the Proxy Statement, to the Board of Directors of the Company (the “Board”) to hold office for a term expiring at the Company’s Annual Meeting of Stockholders in 2027 and until each such person’s successors is duly elected and qualified, or until his or her earlier death, resignation or removal:
Votes For
Votes Withheld
Broker Non-Votes
Howard Clowes
11,863,579
2,186,724
50,807,018
An van Es-Johansson, M.D.
12,384,866
1,665,437
50,807,018
Richard J. Hawkins
12,344,152
1,706,151
50,807,018
Marc H. Hedrick, M.D.
12,350,511
1,699,792
50,807,018
Ronald A. Andrews
12,417,138
1,633,165
50,807,018
Kyle Guse, Esq., MBA, CPA
12,384,591
1,665,712
50,807,018
Proposal No. 2 - Ratification of Appointment of Independent Registered Public Accounting Firm.
The Company’s stockholders ratified the appointment of CBIZ CPAs, P.C. as the Company’s independent registered public accounting firm for the 2026 fiscal year. The votes regarding this proposal were as follows:
Votes For
Votes Against
Abstentions
Broker Non-Votes
60,860,051
2,292,062
1,705,208
0
Proposal No. 3 - Advisory Vote on the Compensation of Named Executive Officers.
The Company’s stockholders approved, on an advisory (non-binding) basis, the compensation of the Company’s named executive officers. The votes regarding this proposal were as follows:
Votes For
Votes Against
Abstentions
Broker Non-Votes
10,389,498
3,364,694
296,111
50,807,018
Proposal No. 4 – Sixth Amendment and Restatement of the Company’s 2020 Stock Incentive Plan.
The Company’s stockholders approved the sixth amendment and restatement of the Company’s 2020 Stock Incentive Plan. The votes regarding this proposal were as follows:
Votes For
Votes Against
Abstentions
Broker Non-Votes
7,976,002
5,648,887
425,414
50,807,018
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.
PLUS THERAPEUTICS, INC.
Date:
May 15, 2026
By:
/s/ Marc H. Hedrick, M.D.
Marc H. Hedrick, M.D.
President and Chief Executive Officer
XML — IDEA: XBRL DOCUMENT
XML
Filename: R1.htm · Sequence: 4
v3.26.1
Document and Entity Information
May 14, 2026
Cover [Abstract]
Security Exchange Name
NASDAQ
Amendment Flag
false
Entity Central Index Key
0001095981
Document Type
8-K
Document Period End Date
May 14, 2026
Entity Registrant Name
PLUS THERAPEUTICS, INC.
Entity Incorporation State Country Code
DE
Entity File Number
001-34375
Entity Tax Identification Number
33-0827593
Entity Address, Address Line One
6420 LEVIT GREEN BOULEVARD
Entity Address, Address Line Two
Suite 310
Entity Address, City or Town
Houston
Entity Address, State or Province
TX
Entity Address, Postal Zip Code
77021
City Area Code
(737)
Local Phone Number
255-7194
Written Communications
false
Soliciting Material
false
Pre Commencement Tender Offer
false
Pre Commencement Issuer Tender Offer
false
Security 12b Title
Common Stock, par value $0.001 per share
Trading Symbol
PSTV
Entity Emerging Growth Company
false
X
- Definition
Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.
+ References
No definition available.
+ Details
Name:
dei_AmendmentFlag
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Area code of city
+ References
No definition available.
+ Details
Name:
dei_CityAreaCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Cover page.
+ References
No definition available.
+ Details
Name:
dei_CoverAbstract
Namespace Prefix:
dei_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.
+ References
No definition available.
+ Details
Name:
dei_DocumentPeriodEndDate
Namespace Prefix:
dei_
Data Type:
xbrli:dateItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.
+ References
No definition available.
+ Details
Name:
dei_DocumentType
Namespace Prefix:
dei_
Data Type:
dei:submissionTypeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 1 such as Attn, Building Name, Street Name
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine1
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 2 such as Street or Suite number
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine2
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the City or Town
+ References
No definition available.
+ Details
Name:
dei_EntityAddressCityOrTown
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Code for the postal or zip code
+ References
No definition available.
+ Details
Name:
dei_EntityAddressPostalZipCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the state or province.
+ References
No definition available.
+ Details
Name:
dei_EntityAddressStateOrProvince
Namespace Prefix:
dei_
Data Type:
dei:stateOrProvinceItemType
Balance Type:
na
Period Type:
duration
X
- Definition
A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityCentralIndexKey
Namespace Prefix:
dei_
Data Type:
dei:centralIndexKeyItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Indicate if registrant meets the emerging growth company criteria.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityEmergingGrowthCompany
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.
+ References
No definition available.
+ Details
Name:
dei_EntityFileNumber
Namespace Prefix:
dei_
Data Type:
dei:fileNumberItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Two-character EDGAR code representing the state or country of incorporation.
+ References
No definition available.
+ Details
Name:
dei_EntityIncorporationStateCountryCode
Namespace Prefix:
dei_
Data Type:
dei:edgarStateCountryItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityRegistrantName
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityTaxIdentificationNumber
Namespace Prefix:
dei_
Data Type:
dei:employerIdItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Local phone number for entity.
+ References
No definition available.
+ Details
Name:
dei_LocalPhoneNumber
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 13e
-Subsection 4c
+ Details
Name:
dei_PreCommencementIssuerTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14d
-Subsection 2b
+ Details
Name:
dei_PreCommencementTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Title of a 12(b) registered security.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b
+ Details
Name:
dei_Security12bTitle
Namespace Prefix:
dei_
Data Type:
dei:securityTitleItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the Exchange on which a security is registered.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection d1-1
+ Details
Name:
dei_SecurityExchangeName
Namespace Prefix:
dei_
Data Type:
dei:edgarExchangeCodeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14a
-Subsection 12
+ Details
Name:
dei_SolicitingMaterial
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Trading symbol of an instrument as listed on an exchange.
+ References
No definition available.
+ Details
Name:
dei_TradingSymbol
Namespace Prefix:
dei_
Data Type:
dei:tradingSymbolItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
-Number 230
-Section 425
+ Details
Name:
dei_WrittenCommunications
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration