Prime Medicine CFO files initial insider Form 3

Prime Medicine, Inc. filed an initial insider ownership report for Makhni Svetlana Ni, who serves as Chief Financial Officer.

Rhea-AI Filing Summary

Prime Medicine, Inc. filed an initial insider ownership report for Makhni Svetlana Ni, who serves as Chief Financial Officer. This Form 3 establishes her status as a reporting person under SEC rules. The provided data shows no reported transactions or holdings in this filing excerpt.

Key Terms

Form 3, Chief Financial Officer, reporting person

3 terms

Form 3 regulatory

"This Form 3 establishes her status as a reporting person"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

Chief Financial Officer financial

"Makhni Svetlana Ni, who serves as Chief Financial Officer"

A Chief Financial Officer (CFO) is the person in charge of a company's money and financial planning. They decide how to spend, save, and invest funds to help the company grow and stay stable. Their role is important because good financial decisions keep the company healthy and successful.

reporting person regulatory

"establishes her status as a reporting person under SEC rules"

FAQ

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

What does the Prime Medicine (PRME) Form 3 for Makhni Svetlana Ni show?

The Form 3 identifies Makhni Svetlana Ni as Chief Financial Officer and a reporting person of Prime Medicine. It serves as her initial insider ownership report, with no transactions disclosed in the provided data.

Does the PRME Form 3 for Makhni Svetlana Ni report any stock transactions?

No transactions are reported in the provided Form 3 data. All transaction-related counts, including buys, sells, exercises, gifts, and tax withholdings, are shown as zero in the summary fields.

Why is a Form 3 filed for Prime Medicine (PRME) executives like the CFO?

Form 3 is filed when someone becomes an insider, such as an officer, director, or major shareholder. It provides the SEC and investors with that person’s initial beneficial ownership position and establishes ongoing reporting obligations.

What roles does Makhni Svetlana Ni hold at Prime Medicine (PRME) according to the Form 3?

According to the Form 3, Makhni Svetlana Ni is an officer of Prime Medicine and holds the title of Chief Financial Officer. She is not listed as a director or a ten percent owner in the provided data.

Are there any derivative securities reported for the PRME CFO on this Form 3?

No derivative securities are reported in the provided Form 3 excerpt. The derivative summary is empty, and derivative transaction counts are shown as zero, indicating no options or similar instruments listed here.

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

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Accepted by SEC EDGAR 04/17/2026 - 08:25 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Makhni Svetlana Ni

(Last) (First) (Middle)

C/O PRIME MEDICINE, INC.

60 FIRST STREET

(Street)

CAMBRIDGE MASSACHUSETTS 02141

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
04/16/2026

3. Issuer Name and Ticker or Trading Symbol
Prime Medicine, Inc. [ PRME ]

3a. Foreign Trading Symbol

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

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)

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)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Ryan Brown, attorney-in-fact	04/17/2026
	** 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 5 (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 3: SEC 1473 (03-26)