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Alnylam (NASDAQ: ALNY) HR chief details stock and option holdings

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3

Rhea-AI Filing Summary

Alnylam Pharmaceuticals executive Melissa McLaughlin, Chief Human Resources Officer, reported her equity holdings in the company. She directly holds 13,353 shares of common stock, including restricted stock units that will convert into shares over time.

She also holds a stock option covering 3,567 shares of common stock at an exercise price of $325.07 per share, expiring on March 2, 2036. The option and RSUs vest over multi‑year schedules tied to her continued service.

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Insider McLaughlin Melissa
Role Chief Human Resources Officer
Type Security Shares Price Value
holding Stock Option (Right to Buy) -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Stock Option (Right to Buy) — 3,567 shares (Direct); Common Stock — 13,353 shares (Direct)
Footnotes (1)
  1. Includes 11,730 shares represented by restricted stock units (RSUs) granted on April 1, 2025 and 1,623 shares represented by RSUs granted on March 2, 2026, under the Second Amended and Restated 2018 Stock Incentive Plan. The RSUs will vest over a three-year period, with one third vesting on each of the first, second and third anniversaries of the grant date, subject to the Reporting Persons continuous service with the Issuer as of each such vesting date. Each RSU represents a contingent right to receive one share of common stock. The stock option vests as to 25% of the shares on the first anniversary of the grant date and the remaining shares vest in equal installments at the end of each successive three-month period thereafter until the fourth anniversary of the grant date, subject to the Reporting Persons continuous service with the Issuer as of each such vesting date.
Common shares held 13,353 shares Directly held common stock following reported holdings
Option underlying shares 3,567 shares Common stock underlying reported stock option holding
Option exercise price $325.07/share Exercise price for stock option expiring March 2, 2036
RSUs from April 1, 2025 grant 11,730 shares RSUs granted April 1, 2025 vesting over three years
RSUs from March 2, 2026 grant 1,623 shares RSUs granted March 2, 2026 vesting over three years
Option vesting first tranche 25% of shares Vests on first anniversary of grant date
Option full vesting period 4 years Remaining shares vest quarterly after first anniversary
restricted stock units (RSUs) financial
"Includes 11,730 shares represented by restricted stock units (RSUs) granted on April 1, 2025 and 1,623 shares represented by RSUs granted on March 2, 2026"
Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.
Second Amended and Restated 2018 Stock Incentive Plan financial
"under the Second Amended and Restated 2018 Stock Incentive Plan"
Stock Option (Right to Buy) financial
"security_title: "Stock Option (Right to Buy)""
vest over a three-year period financial
"The RSUs will vest over a three-year period, with one third vesting on each of the first, second and third anniversaries"
continuous service financial
"subject to the Reporting Persons continuous service with the Issuer as of each such vesting date"
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SEC Form 3
FORM 3UNITED 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*
McLaughlin Melissa
(Last)(First)(Middle)
675 WEST KENDALL STREET
(Street)
CAMBRIDGE MASSACHUSETTS 02142
(City)(State)(Zip)
UNITED STATES
(Country)		2. Date of Event Requiring Statement (Month/Day/Year)
03/25/2026		3. Issuer Name and Ticker or Trading Symbol
ALNYLAM PHARMACEUTICALS, INC. [ ALNY ]
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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Human Resources Officer
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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(1)13,353D
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 ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy) (2)03/02/2036Common Stock3,567$325.07D
Explanation of Responses:
1. Includes 11,730 shares represented by restricted stock units (RSUs) granted on April 1, 2025 and 1,623 shares represented by RSUs granted on March 2, 2026, under the Second Amended and Restated 2018 Stock Incentive Plan. The RSUs will vest over a three-year period, with one third vesting on each of the first, second and third anniversaries of the grant date, subject to the Reporting Persons continuous service with the Issuer as of each such vesting date. Each RSU represents a contingent right to receive one share of common stock.
2. The stock option vests as to 25% of the shares on the first anniversary of the grant date and the remaining shares vest in equal installments at the end of each successive three-month period thereafter until the fourth anniversary of the grant date, subject to the Reporting Persons continuous service with the Issuer as of each such vesting date.
/s/ Brett Budzinski, Attorney-in-Fact For Melissa McLaughlin04/07/2026
** 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 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)

Source: View Original Filing on SEC EDGAR

FAQ

What does the ALNY Form 3 filing show for Melissa McLaughlin?

The filing shows that Chief Human Resources Officer Melissa McLaughlin holds 13,353 Alnylam common shares and a stock option for 3,567 shares. These positions reflect her equity-based compensation, with vesting tied to continued employment over several years.

How many Alnylam (ALNY) shares does Melissa McLaughlin beneficially own?

She beneficially owns 13,353 shares of Alnylam common stock. This total includes shares represented by restricted stock units that will settle into common stock as they vest, assuming she continues in service with the company through each vesting date.

What stock options are reported for Melissa McLaughlin in ALNY’s Form 3?

She holds a stock option to buy 3,567 Alnylam common shares at an exercise price of $325.07 per share. The option expires on March 2, 2036 and vests over four years, starting with 25% on the first anniversary of the grant date.

How are Melissa McLaughlin’s Alnylam RSUs structured?

The filing notes 11,730 RSUs granted April 1, 2025 and 1,623 RSUs granted March 2, 2026. Each grant vests in three equal annual installments over three years, contingent on her continuous service, with each RSU delivering one share of common stock at vesting.

What compensation plan covers Melissa McLaughlin’s Alnylam RSUs?

Her RSUs were granted under Alnylam’s Second Amended and Restated 2018 Stock Incentive Plan. This plan provides equity-based awards, including RSUs that vest over time, aligning executive compensation with long-term company performance and continued employment.