STOCK TITAN

Director at Plus Therapeutics (PSTV) receives new equity awards

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Plus Therapeutics director Kyle Guse reported receiving new equity compensation awards. He was granted stock options covering 3,686 shares of Common Stock at an exercise price of $5.76 per share, expiring on May 14, 2036. These options vest monthly over 12 months and will vest in full at the company’s 2027 Annual Stockholder Meeting, subject to continued service.

He was also granted 3,686 Restricted Stock Units, each representing a contingent right to receive one share of Common Stock. The RSUs vest in four equal quarterly installments, starting with one-quarter vesting on July 1, 2026, with the remainder vesting quarterly thereafter. The filing shows no open-market buys or sells, only grants classified as acquisitions.

Positive

  • None.

Negative

  • None.
Insider Guse Kyle
Role null
Type Security Shares Price Value
Grant/Award Restricted Stock Units 3,686 $0.00 --
Grant/Award Stock Option (Right to Buy) 3,686 $0.00 --
Holdings After Transaction: Restricted Stock Units — 3,686 shares (Direct, null); Stock Option (Right to Buy) — 3,686 shares (Direct, null)
Footnotes (1)
  1. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs awarded vest ratably over four quarters in substantially equal 1/4th increments, commencing with 1/4th vesting on July 1, 2026 and the remainder vesting quarterly thereafter. The options vest monthly over 12 months from the grant date in substantially equal monthly increments, provided that the options vest in full on the Issuer's 2027 Annual Stockholder Meeting, subject to the Reporting Person's continued service to the Issuer through each applicable vesting date or, if earlier, such annual meeting.
Stock options granted 3,686 options Grant dated May 14, 2026
Option exercise price $5.76 per share Stock Option (Right to Buy) grant
Option expiration May 14, 2036 Expiration date for granted options
RSUs granted 3,686 RSUs Grant dated May 14, 2026
RSU initial vesting date July 1, 2026 First 1/4 of RSUs vest
Post-grant RSU holdings 3,686 RSUs Total RSUs following transaction
Restricted Stock Unit financial
"Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share..."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
Stock Option (Right to Buy financial
"security_title": "Stock Option (Right to Buy)""
exercise price financial
"conversion_or_exercise_price": "5.7600""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
Annual Stockholder Meeting regulatory
"options vest in full on the Issuer's 2027 Annual Stockholder Meeting..."
An annual stockholder meeting is a yearly gathering where a company's owners (shareholders) receive updates on performance, vote on key issues like board members, executive pay and major corporate plans, and ask questions of management. Think of it as a company town hall where choices about oversight and direction are decided; outcomes can affect management accountability, corporate strategy and ultimately the value and risks of investors’ shares.
vest financial
"The RSUs awarded vest ratably over four quarters in substantially equal 1/4th increments..."
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Guse Kyle

(Last)(First)(Middle)
C/O PLUS THERAPEUTICS INC.
6420 LEVIT GREEN BOULEVARD, SUITE 310

(Street)
HOUSTON TEXAS 77021

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
PLUS THERAPEUTICS, INC. [ PSTV ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units$0(1)05/14/2026A3,686 (1) (1)Common Stock3,686$03,686D
Stock Option (Right to Buy)$5.7605/14/2026A3,686 (2)05/14/2036Common Stock3,686$03,686D
Explanation of Responses:
1. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs awarded vest ratably over four quarters in substantially equal 1/4th increments, commencing with 1/4th vesting on July 1, 2026 and the remainder vesting quarterly thereafter.
2. The options vest monthly over 12 months from the grant date in substantially equal monthly increments, provided that the options vest in full on the Issuer's 2027 Annual Stockholder Meeting, subject to the Reporting Person's continued service to the Issuer through each applicable vesting date or, if earlier, such annual meeting.
Andrew Sims, as attorney-in-fact05/18/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What equity awards did Kyle Guse report for Plus Therapeutics (PSTV)?

Kyle Guse reported grants of stock options and Restricted Stock Units. He received options for 3,686 shares at a $5.76 exercise price and 3,686 RSUs, each representing a right to receive one share of Plus Therapeutics Common Stock, subject to vesting.

How do Kyle Guse’s new Plus Therapeutics (PSTV) stock options vest?

The options vest monthly over 12 months from the May 14, 2026 grant date. They are scheduled to vest in full at Plus Therapeutics’ 2027 Annual Stockholder Meeting, assuming Kyle Guse continues serving the company through each vesting date or that meeting.

What is the vesting schedule for Kyle Guse’s Plus Therapeutics (PSTV) RSUs?

The 3,686 RSUs vest ratably over four quarters. One-quarter vests on July 1, 2026, with the remaining three-quarters vesting in substantially equal quarterly installments thereafter, contingent on Kyle Guse’s continued service to Plus Therapeutics through each vesting date.

What does each Restricted Stock Unit represent for Plus Therapeutics (PSTV)?

Each Restricted Stock Unit represents a contingent right to receive one share of Plus Therapeutics Common Stock. Shares are delivered only as the RSUs vest over time, meaning Kyle Guse must satisfy the vesting conditions before receiving the underlying Common Stock.

Did Kyle Guse buy or sell Plus Therapeutics (PSTV) shares on the market?

The filing shows no open-market purchases or sales by Kyle Guse. Both reported transactions are classified as grant or award acquisitions of derivative securities—stock options and RSUs—rather than discretionary market trades in Plus Therapeutics Common Stock.

When do Kyle Guse’s Plus Therapeutics (PSTV) stock options expire?

The stock options granted to Kyle Guse on May 14, 2026 carry an expiration date of May 14, 2036. He may exercise these options, once vested, at an exercise price of $5.76 per share any time before that expiration date, subject to plan terms.