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  4. [Form 4] RHYTHM PHARMACEUTICALS, INC. Insider Trading Activity

Director at Rhythm Pharmaceuticals (RYTM) receives new RSUs, options and exercises units

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

RHYTHM PHARMACEUTICALS director Lynn A. Tetreault received new equity awards and exercised existing units. On June 24, 2026, she was granted 2,324 restricted stock units and options for 3,691 shares of common stock at an exercise price of $107.55 per share. The options and these RSUs vest in full on the earlier of June 24, 2027 or the day immediately prior to the company’s 2027 annual stockholder meeting, subject to her continued board service.

On June 23, 2026, 4,712 restricted stock units were converted into 4,712 shares of common stock, leaving no remaining units from that grant. Following these transactions, she directly holds 11,712 shares of common stock.

Positive

  • None.

Negative

  • None.
Insider TETRAULT LYNN A.
Role null
Type Security Shares Price Value
Grant/Award Stock Option (right to buy) 3,691 $0.00 --
Grant/Award Restricted Stock Units 2,324 $0.00 --
Exercise Restricted Stock Units 4,712 $0.00 --
Exercise Common Stock 4,712 $0.00 --
Holdings After Transaction: Stock Option (right to buy) — 3,691 shares (Direct, null); Restricted Stock Units — 2,324 shares (Direct, null); Common Stock — 11,712 shares (Direct, null)
Footnotes (1)
  1. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. The restricted stock units are fully vested. The restricted stock units have no expiration date. The options fully vest upon the earlier of (i) June 24, 2027 or (ii) the day immediately prior to the date of the Issuer's next annual meeting of the stockholders to be held in 2027, subject to the Reporting Person's continued service on such vesting date. The restricted stock units fully vest upon the earlier of (i) June 24, 2027 or (ii) the day immediately prior to the date of the Issuer's next annual meeting of the stockholders to be held in 2027, subject to the Reporting Person's continued service on such vesting date. The restricted stock units have no expiration date.
RSU grant 2,324 restricted stock units Grant to director on June 24, 2026
Option grant size 3,691 options Right to buy common stock, granted June 24, 2026
Option exercise price $107.55 per share Exercise price for 3,691 stock options
RSUs exercised 4,712 units Converted into 4,712 common shares on June 23, 2026
Common shares after transactions 11,712 shares Direct holdings following reported transactions
Option expiration June 23, 2036 Expiration date of 3,691 stock options
Vesting date trigger June 24, 2027 Latest vesting date for new RSUs and options
Restricted Stock Units financial
"Each restricted stock unit represents a contingent right to receive one share"
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.
Stock Option (right to buy) financial
"Stock Option (right to buy)"
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
vesting financial
"The options fully vest upon the earlier of (i) June 24, 2027"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
expiration date financial
"The restricted stock units have no expiration date."
The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
TETRAULT LYNN A.
(Last)(First)(Middle)
C/O RHYTHM PHARMACEUTICALS, INC.
222 BERKELEY STREET, 12TH FLOOR
(Street)
BOSTON MASSACHUSETTS 02116
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
RHYTHM PHARMACEUTICALS, INC. [ RYTM ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/23/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/23/2026M4,712A(1)11,712D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)06/23/2026M4,712 (2) (2)Common Stock4,712$00D
Stock Option (right to buy)$107.5506/24/2026A3,691 (3)06/23/2036Common Stock3,691$03,691D
Restricted Stock Units(1)06/24/2026A2,324 (4) (4)Common Stock2,324$02,324D
Explanation of Responses:
1. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
2. The restricted stock units are fully vested. The restricted stock units have no expiration date.
3. The options fully vest upon the earlier of (i) June 24, 2027 or (ii) the day immediately prior to the date of the Issuer's next annual meeting of the stockholders to be held in 2027, subject to the Reporting Person's continued service on such vesting date.
4. The restricted stock units fully vest upon the earlier of (i) June 24, 2027 or (ii) the day immediately prior to the date of the Issuer's next annual meeting of the stockholders to be held in 2027, subject to the Reporting Person's continued service on such vesting date. The restricted stock units have no expiration date.
/s/ Stephen Vander Stoep, attorney-in-fact for Lynn A. Tetrault06/25/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

What equity awards did RYTM director Lynn A. Tetreault receive?

Lynn A. Tetreault received 2,324 restricted stock units and stock options for 3,691 shares at an exercise price of $107.55 per share. These awards increase her long-term equity exposure to Rhythm Pharmaceuticals.

When do Lynn A. Tetreault’s new RYTM stock options and RSUs vest?

The new options and restricted stock units fully vest on the earlier of June 24, 2027 or the day immediately before Rhythm Pharmaceuticals’ 2027 annual stockholder meeting, provided Tetreault continues serving as a director through that vesting date.

Did Lynn A. Tetreault buy or sell RYTM shares in this Form 4?

The filing shows no open-market buys or sells. It reports equity grants and the exercise of 4,712 restricted stock units into common stock, which increased her directly held shares without recording any sale transactions.

How many Rhythm Pharmaceuticals shares does Lynn A. Tetreault now hold?

After the reported transactions, Lynn A. Tetreault directly holds 11,712 shares of Rhythm Pharmaceuticals common stock. This reflects the conversion of vested restricted stock units into shares and does not include any unexercised stock options.

What happened to the 4,712 restricted stock units reported for RYTM?

The 4,712 restricted stock units were exercised and converted into 4,712 shares of common stock, leaving no remaining units from that specific grant. This conversion increased Tetreault’s direct share ownership in Rhythm Pharmaceuticals.

Do the reported RYTM restricted stock units have an expiration date?

The footnotes state that the restricted stock units have no expiration date. They represent a contingent right to receive one share of Rhythm Pharmaceuticals common stock for each unit, subject to vesting conditions being satisfied.