William Hartzel - 06 Feb 2026 Form 4 Insider Report for Emergent BioSolutions Inc. (EBS)

Role: SVP, Bioservices
Signature: /s/ Richard S. Lindahl, Attorney-in-fact
Issuer symbol: EBS
Transactions as of: 06 Feb 2026
Net transactions value: -$69,899
Form type: 4
Filing time: 10 Feb 2026, 19:06:54 UTC
Previous filing: 13 Nov 2025
Next filing: 05 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Hartzel William	SVP, Bioservices	300 PROFESSIONAL DRIVE, GAITHERSBURG	/s/ Richard S. Lindahl, Attorney-in-fact	10 Feb 2026	0001989644

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EBS	Common Stock	Disposed to Issuer	$63,019	-5,771	-5.6%	$10.92	97,311	06 Feb 2026	Direct	F1
transaction	EBS	Common Stock	Tax liability	$6,880	-630	-0.65%	$10.92	96,681	06 Feb 2026	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Consists of performance stock units granted under the Emergent BioSolutions Inc. Stock Incentive Plan. Each PSU represents a right to receive one share of common stock. The PSUs vest upon achievement with respect to both cumulative revenues and adjusted EBITDA as a percentage of total GAAP revenue calculated on a cumulative basis over the three-year period beginning January 1, 2023 and ending December 31, 2025. On February 06, 2026, the final certification date, the Compensation Committee certified the achievement of the 2023-2025 PSUs at a payout factor of 25% of target resulting in the actual award of 1,922 shares of common stock, which is less than the 7,693 shares previously reported on March 02, 2023 and June 09, 2023.
F2	Represents shares of common stock withheld to pay taxes associated with vesting and settlement of restricted stock units

Content

Consists of performance stock units granted under the Emergent BioSolutions Inc. Stock Incentive Plan. Each PSU represents a right to receive one share of common stock. The PSUs vest upon achievement with respect to both cumulative revenues and adjusted EBITDA as a percentage of total GAAP revenue calculated on a cumulative basis over the three-year period beginning January 1, 2023 and ending December 31, 2025. On February 06, 2026, the final certification date, the Compensation Committee certified the achievement of the 2023-2025 PSUs at a payout factor of 25% of target resulting in the actual award of 1,922 shares of common stock, which is less than the 7,693 shares previously reported on March 02, 2023 and June 09, 2023.

Represents shares of common stock withheld to pay taxes associated with vesting and settlement of restricted stock units