Emergent BioSolutions (EBS) SVP awarded 100,111 restricted stock units under amended plan

Rhea-AI Filing Summary

Williams Paul Anthony reported acquisition or exercise transactions in this Form 4 filing.

Emergent BioSolutions Inc. Senior Vice President, Products Business, Paul Anthony Williams received a grant of 100,111 shares of common stock in the form of restricted stock units. This award was approved by the Compensation Committee on March 2, 2026, contingent on stockholder approval of an amendment to the 2006 Stock Incentive Plan, which stockholders granted on April 29, 2026.

The restricted stock units, granted under the Amended Stock Incentive Plan, vest in three annual installments beginning on the first anniversary of the approval date, assuming continued service with the company. After this grant, Williams directly holds 162,792 shares, and each restricted stock unit represents the right to receive one share of Emergent BioSolutions common stock, subject to adjustment under the grant terms.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Williams Paul Anthony

Role SVP, Products Business

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	100,111	$0.00	--

Holdings After Transaction: Common Stock — 162,792 shares (Direct, null)

Footnotes (1)

1. The restricted stock unit grant was approved by the Compensation Committee of Emergent BioSolutions Inc. (the "Company"), on March 2, 2026, subject to stockholder approval of an amendment of the Company's 2006 Stock Incentive Plan (the "Amended Stock Incentive Plan"), under which the restricted stock units were granted. The Company's stockholders approved the Amended Stock Incentive Plan on April 29, 2026. Consists of restricted stock units granted under the Company's Amended Stock Incentive Plan. These restricted stock units vest in three annual installments beginning on the anniversary of the date of approval, assuming continued service with the Company. Each restricted stock unit represents the right of the Reporting Person to receive one share of common stock of Emergent BioSolutions Inc., subject to adjustment as provided in the grant agreement.

Key Figures

RSU grant size: 100,111 shares Post-grant holdings: 162,792 shares Committee approval date: March 2, 2026 +2 more

5 metrics

RSU grant size 100,111 shares Restricted stock units granted on approval under Amended Stock Incentive Plan

Post-grant holdings 162,792 shares Total common stock held directly after the RSU grant

Committee approval date March 2, 2026 Compensation Committee approved RSU grant subject to stockholder approval

Stockholder approval date April 29, 2026 Stockholders approved the Amended 2006 Stock Incentive Plan

Vesting schedule Three annual installments RSUs vest annually beginning on the first anniversary of approval date

Key Terms

restricted stock units, Amended Stock Incentive Plan, Compensation Committee, vest in three annual installments

4 terms

restricted stock units financial

"Consists of restricted stock units granted under the Company's Amended Stock Incentive Plan."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Amended Stock Incentive Plan financial

"subject to stockholder approval of an amendment of the Company's 2006 Stock Incentive Plan (the "Amended Stock Incentive Plan")"

Compensation Committee financial

"The restricted stock unit grant was approved by the Compensation Committee of Emergent BioSolutions Inc."

A compensation committee is a group within a company's leadership responsible for setting and reviewing how much top executives and employees are paid, including salaries, bonuses, and benefits. It matters to investors because fair and effective pay decisions can influence a company's performance, leadership motivation, and overall governance, helping ensure that the company’s management is aligned with shareholders’ interests.

vest in three annual installments financial

"These restricted stock units vest in three annual installments beginning on the anniversary of the date of approval"

Form 4 Insider Transactions: What Each Field Means →

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^*

Williams Paul Anthony

(Last) (First) (Middle)

300 PROFESSIONAL DRIVE

(Street)

GAITHERSBURG MARYLAND 20879

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Emergent BioSolutions Inc. [ EBS ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Products Business

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/29/2026

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
Common Stock	04/29/2026	04/29/2026(1)	A		100,111(2)	A	$0	162,792	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. The restricted stock unit grant was approved by the Compensation Committee of Emergent BioSolutions Inc. (the "Company"), on March 2, 2026, subject to stockholder approval of an amendment of the Company's 2006 Stock Incentive Plan (the "Amended Stock Incentive Plan"), under which the restricted stock units were granted. The Company's stockholders approved the Amended Stock Incentive Plan on April 29, 2026.

2. Consists of restricted stock units granted under the Company's Amended Stock Incentive Plan. These restricted stock units vest in three annual installments beginning on the anniversary of the date of approval, assuming continued service with the Company. Each restricted stock unit represents the right of the Reporting Person to receive one share of common stock of Emergent BioSolutions Inc., subject to adjustment as provided in the grant agreement.

Remarks:

	/s/ Richard S. Lindahl, Attorney-in-fact	05/01/2026
	** 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)

FAQ

What insider transaction did Emergent BioSolutions (EBS) report for Paul Anthony Williams?

Emergent BioSolutions reported that SVP, Products Business, Paul Anthony Williams received 100,111 restricted stock units of common stock as a grant. This equity award was made under the company’s Amended Stock Incentive Plan and reflects compensation rather than an open-market purchase or sale.

How many Emergent BioSolutions (EBS) shares does Paul Anthony Williams hold after this Form 4?

Following the restricted stock unit grant, Paul Anthony Williams is shown holding 162,792 shares of Emergent BioSolutions common stock directly. This total includes the new award, structured as restricted stock units that convert into shares as they vest over time.

How do the restricted stock units granted to the Emergent BioSolutions (EBS) executive vest?

The restricted stock units granted to Paul Anthony Williams vest in three annual installments, starting on the first anniversary of the approval date. Vesting is conditioned on his continued service with Emergent BioSolutions, aligning long-term compensation with ongoing employment and company performance.

What approvals were required for the Emergent BioSolutions (EBS) restricted stock unit grant?

The grant was approved by the Emergent BioSolutions Compensation Committee on March 2, 2026, but was contingent on stockholder approval of an amended 2006 Stock Incentive Plan. Stockholders later approved the Amended Stock Incentive Plan on April 29, 2026, enabling the award to proceed.

What does each restricted stock unit represent in the Emergent BioSolutions (EBS) grant?

Each restricted stock unit represents the right for Paul Anthony Williams to receive one share of Emergent BioSolutions common stock. This right is subject to vesting conditions and potential adjustments specified in the grant agreement under the company’s Amended Stock Incentive Plan.