MongoDB (MDB) director Peter Killalea exercises 30,000 options, boosts share holdings

Rhea-AI Filing Summary

MongoDB, Inc. director Peter Thomas Killalea reported an option exercise that increased his direct common stock holdings. On November 25, 2025, he exercised a stock option for 30,000 shares of MongoDB common stock at an exercise price of $6.50 per share, acquiring the same number of shares.

Following this transaction, he directly held 62,293 shares of common stock. In addition, four separate trusts established on November 15, 2021 each held 5,000 shares of MongoDB common stock for the benefit of his children. The option was immediately exercisable and fully vested, and the filing notes the transaction was reported late due to an inadvertent administrative error.

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

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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^*

Killalea Peter Thomas

(Last) (First) (Middle)

C/O MONGODB, INC.

1633 BROADWAY, 38TH FLOOR

(Street)

NEW YORK NY 10019

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MongoDB, Inc. [ MDB ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
11/25/2025

4. 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 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	11/25/2025		M		30,000	A	$6.5	62,293	D
Common Stock								5,000	I	UAISLE Trust U/A DTD 11/15/2021(1)
Common Stock								5,000	I	CEANSA Trust U/A DTD 11/15/2021(2)
Common Stock								5,000	I	BREOGA Trust U/A DTD 11/15/2021(3)
Common Stock								5,000	I	AOGALL Trust U/A DTD 11/15/2021(4)

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
Stock Option (Right to Buy)	$6.5	11/25/2025		M			30,000	(5)	12/03/2025	Common Stock	30,000	$0	0	D

Explanation of Responses:

1. These shares are held by the UAISLE Trust U/A DTD 11/15/2021 for the benefit of the Reporting Person's children.

2. These shares are held by the CEANSA Trust U/A DTD 11/15/2021 for the benefit of the Reporting Person's children.

3. These shares are held by the BREOGA Trust U/A DTD 11/15/2021 for the benefit of the Reporting Person's children.

4. These shares are held by AOGALL Trust U/A DTD 11/15/2021 for the benefit of the Reporting Person's children.

5. Immediately exercisable and fully vested.

Remarks:

This transaction is being reported late due to an inadvertent administrative error.

	/s/ Gahee Lee, Attorney in Fact	02/06/2026
	** 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).
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FAQ

What insider transaction did MongoDB (MDB) director Peter Thomas Killalea report?

Peter Thomas Killalea reported exercising a stock option for 30,000 MongoDB common shares at an exercise price of $6.50 per share. This option exercise converted derivative securities into directly held common stock, increasing his direct share ownership in the company.

How many MongoDB (MDB) shares does Peter Thomas Killalea hold after the reported transaction?

After the transaction, Peter Thomas Killalea directly held 62,293 shares of MongoDB common stock. In addition, four separate trusts for the benefit of his children each held 5,000 shares, reflecting indirect beneficial ownership through family trusts.

What happened to Peter Thomas Killalea’s MongoDB stock option reported on November 25, 2025?

On November 25, 2025, a stock option for 30,000 shares of MongoDB common stock with a $6.50 exercise price was exercised in full. Following the exercise, the number of derivative securities reported for this option position was reduced to zero.

Were any of MongoDB (MDB) director Peter Thomas Killalea’s shares held through trusts?

Yes. Four trusts established on November 15, 2021 each held 5,000 shares of MongoDB common stock. These UAISLE, CEANSA, BREOGA, and AOGALL trusts hold shares for the benefit of his children as disclosed in the footnotes.

Why does the MongoDB (MDB) Form 4 mention a late filing for Peter Thomas Killalea?

The Form 4 states that the transaction was reported late due to an inadvertent administrative error. This remark explains the timing of the disclosure relative to the November 25, 2025 transaction date, without indicating any change to the transaction terms.

What does it mean that the MongoDB stock option was immediately exercisable and fully vested?

The filing notes the option was immediately exercisable and fully vested, meaning there were no remaining time-based or service conditions. Killalea was able to exercise all 30,000 option shares at once at the specified exercise price of $6.50 per share.