Strata Critical Co-CEO reports PSU-related share award

Strata Critical Medical, Inc. Co-CEO and CFO William A. Heyburn reported equity compensation activity involving the company’s Class A common stock.

Rhea-AI Filing Summary

Strata Critical Medical, Inc. Co-CEO and CFO William A. Heyburn reported equity compensation activity involving the company’s Class A common stock. On April 23, 2026, he acquired 545,625 shares at $0.0000 per share upon vesting of performance-based restricted stock units granted on March 20, 2025, after the compensation committee certified that performance criteria were met.

On April 24, 2026, 301,731 shares were disposed of at $4.92 per share through shares withheld by the issuer to cover tax withholding obligations related to the PSU vesting, rather than an open-market sale. Following these transactions, Heyburn directly held 1,580,668 shares of Class A common stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Heyburn William A.

Role Co-CEO and CFO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Class A common stock, $0.0001 par value per share	301,731	$4.92	$1.48M
Grant/Award	Class A common stock, $0.0001 par value per share	545,625	$0.00	$0.00

Holdings After Transaction: Class A common stock, $0.0001 par value per share — 1,580,668 shares (Direct)

Footnotes (2)

1. F1. Represents shares that were acquired upon the certification of the Compensation Committee of the Issuer's Board of Directors of the satisfaction of performance criteria underlying an award of performance-based restricted stock units ("PSUs") granted to the Reporting Person on March 20, 2025.
2. F2. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of PSUs.

Key Figures

PSU shares acquired: 545,625 shares Tax withholding shares: 301,731 shares Withholding price: $4.92 per share +2 more

5 metrics

PSU shares acquired 545,625 shares Class A common stock from performance-based RSUs vesting on April 23, 2026

Tax withholding shares 301,731 shares Shares withheld at $4.92 per share on April 24, 2026

Withholding price $4.92 per share Value used for shares withheld to satisfy tax obligations

Shares held after transactions 1,580,668 shares Direct Class A common stock ownership after PSU vesting and tax withholding

PSU grant date March 20, 2025 Original grant date of performance-based restricted stock units

Key Terms

performance-based restricted stock units, PSUs, tax withholding obligations, grant, award, or other acquisition, +1 more

5 terms

performance-based restricted stock units financial

"performance-based restricted stock units ("PSUs") granted to the Reporting Person"

Performance-based restricted stock units are a type of employee equity award that converts into company shares only if predefined financial or operational targets are met over a set period. Think of it like a bonus check that becomes stock only when specific goals are hit; it ties pay to results, aligning managers’ incentives with shareholders. Investors care because these awards affect future share count, executive incentives, and signal how management’s success will be measured and rewarded.

PSUs financial

"underlying an award of performance-based restricted stock units ("PSUs") granted"

PSUs are company shares promised to employees or executives that only become actual stock if the business hits specific performance targets over a set period. For investors, PSUs matter because they link pay to measurable outcomes — similar to a conditional bonus that converts into ownership — which can influence management decisions, dilution of shares, and signals about confidence in future results.

tax withholding obligations financial

"shares withheld by the Issuer to satisfy tax withholding obligations in connection"

grant, award, or other acquisition financial

"transaction code description: Grant, award, or other acquisition"

payment of exercise price or tax liability by delivering securities financial

"transaction code description: Payment of exercise price or tax liability by delivering securities"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Strata Critical Medical (SRTA) report for William A. Heyburn?

William A. Heyburn reported a PSU-related share award and tax withholding. He received 545,625 Class A shares from vested performance-based RSUs, and 301,731 shares were withheld to satisfy tax obligations, leaving him with 1,580,668 shares directly owned afterward.

How many Strata Critical Medical (SRTA) shares did Heyburn receive from PSU vesting?

Heyburn received 545,625 Class A shares at $0.0000 per share from performance-based RSUs vesting. The vesting followed certification by the compensation committee that the award’s performance criteria, tied to PSUs granted March 20, 2025, had been satisfied.

Were any of Heyburn’s Strata Critical Medical (SRTA) shares sold on the open market?

The filing shows no open-market sale. Instead, 301,731 shares were disposed of through issuer withholding at $4.92 per share solely to cover tax withholding obligations arising from PSU vesting, a common non-market mechanism for satisfying tax liabilities.

How many Strata Critical Medical (SRTA) shares does Heyburn hold after these transactions?

After the reported Form 4 transactions, Heyburn directly holds 1,580,668 Class A common shares. This figure reflects both the 545,625 PSU-related shares acquired and the 301,731 shares withheld by the issuer to satisfy associated tax obligations on the vesting.

What do the performance-based RSUs in Strata Critical Medical’s (SRTA) filing represent?

The performance-based RSUs (PSUs) represent equity awards that vest only when specific performance criteria are met. In this case, shares were issued after the compensation committee certified that the PSU performance conditions from the March 20, 2025 grant were satisfied.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/27/2026 - 05:45 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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^*

Heyburn William A.

(Last) (First) (Middle)

C/O STRATA CRITICAL MEDICAL, INC.

666 THIRD AVENUE, 25TH FLOOR

(Street)

NEW YORK NEW YORK 10017

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Strata Critical Medical, Inc. [ SRTA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Co-CEO and CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/23/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Class A common stock, $0.0001 par value per share	04/23/2026		A		545,625(1)	A	$0	1,882,399	D
Class A common stock, $0.0001 par value per share	04/24/2026		F		301,731(2)	D	$4.92	1,580,668	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares that were acquired upon the certification of the Compensation Committee of the Issuer's Board of Directors of the satisfaction of performance criteria underlying an award of performance-based restricted stock units ("PSUs") granted to the Reporting Person on March 20, 2025.

2. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of PSUs.

Remarks:

	/s/ Melissa M. Tomkiel, as attorney-in-fact for William A. Heyburn	04/27/2026
	** Signature of Reporting Person	Date
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)