SEC FORM 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person ^*

Horich William Todd

(Last)

(First)

(Middle)

C/O SUPERNUS PHARMACEUTICALS, INC.,

9715 KEY WEST AVENUE

(Street)

ROCKVILLE

20850

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/01/2026

3. Issuer Name and Ticker or Trading Symbol
SUPERNUS PHARMACEUTICALS, INC. [ SUPN ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
SVP, Commercial Operations

5. If Amendment, Date of Original Filed (Month/Day/Year)

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	4,832	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (Right to Buy)	⁽¹⁾	02/14/2028	Common Stock	13,000	39.4	D
Employee Stock Option (Right to Buy)	⁽²⁾	02/22/2029	Common Stock	14,000	36.75	D
Employee Stock Option (Right to Buy)	⁽³⁾	02/19/2031	Common Stock	17,000	29.61	D
Employee Stock Option (Right to Buy)	⁽⁴⁾	02/22/2032	Common Stock	18,000	32.2	D
Employee Stock Option (Right to Buy)	⁽⁵⁾	02/23/2033	Common Stock	20,000	38.6	D
Employee Stock Option (Right to Buy)	⁽⁶⁾	02/22/2034	Common Stock	25,000	27.94	D
Employee Stock Option (Right to Buy)	⁽⁷⁾	02/19/2035	Common Stock	20,000	33.52	D
Employee Stock Option (Right to Buy)	⁽⁸⁾	02/18/2036	Common Stock	13,500	50.2	D
Restricted Stock Unit	⁽⁹⁾	⁽⁹⁾	Common Stock	6,250	⁽¹⁰⁾	D
Restricted Stock Unit	⁽¹¹⁾	⁽¹¹⁾	Common Stock	2,500	⁽¹⁰⁾	D
Restricted Stock Unit	⁽¹²⁾	⁽¹²⁾	Common Stock	3,375	⁽¹⁰⁾	D
Restricted Stock Unit	⁽¹³⁾	⁽¹³⁾	Common Stock	3,000	⁽¹⁰⁾	D
Performance Share Unit	⁽¹⁴⁾	⁽¹⁴⁾	Common Stock	3,750	0	D
Performance Share Unit	⁽¹⁴⁾	⁽¹⁴⁾	Common Stock	1,125	0	D
Performance Share Unit	⁽¹⁴⁾	⁽¹⁴⁾	Common Stock	2,625	0	D

Explanation of Responses:

1. The option vests in four equal annual installments beginning on February 14, 2019.

2. The option vests in four equal annual installments beginning on February 22, 2020.

3. The option vests in four equal annual installments beginning on February 19, 2022.

4. The option vests in four equal annual installments beginning on February 22, 2023.

5. The option vests in four equal annual installments beginning on February 23, 2024.

6. The option vests in four equal annual installments beginning on February 22, 2025.

7. The option vests in four equal annual installments beginning on February 19, 2026.

8. The option vests in four equal annual installments beginning on February 18, 2027.

9. These restricted stock units are settled in common stock upon vesting, which occurs in four equal annual installments, beginning on February 23, 2024.

10. Each restricted stock unit represents the right to receive one share of Supernus common stock upon vesting.

11. These restricted stock units are settled in common stock upon vesting, which occurs in four equal annual installments, beginning on February 22, 2025.

12. These restricted stock units are settled in common stock upon vesting, which occurs in four equal annual installments, beginning on February 19, 2026.

13. These restricted stock units are settled in common stock upon vesting, which occurs in four equal annual installments, beginning on February 18, 2027.

14. On February 22, 2024, the Reporting Person was awarded Performance Share Units, a portion of which vested upon the achievement of individual performance objectives within a defined performance period, which objectives were established on June 24, 2024.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Timothy C. Dec, as attorney-in-fact	03/10/2026
	** 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.

ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

EX-24