IonQ CEO sells 16,121 shares for tax withholding

IonQ’s CEO delivered 16,121 shares to cover taxes on RSU vesting, retaining over 1.12 million shares directly.

Rhea-AI Filing Summary

IonQ, Inc. (IONQ) reports that President and CEO Niccolo de Masi disposed of 16,121 shares of common stock on September 11, 2026, through a tax-withholding disposition tied to the vesting of restricted stock units. The weighted average sale price was $37.0932 per share, with sales executed between $36.35 and $37.62. Following this transaction, de Masi directly holds 1,123,426 shares of IonQ common stock.

Insider Trade Summary

Tax Withholding: 16,121 shares

Tax Withholding 1 txn

Insider de Masi Niccolo

Role President and CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	16,121	$37.0932	$598K

Holdings After Transaction: Common Stock — 1,123,426 shares (Direct)

Footnotes (2)

1. F1. The reported securities were sold to satisfy the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.62, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Shares disposed: 16,121 shares Weighted average sale price: $37.0932 per share Sale price range: $36.35–$37.62 per share +1 more

4 metrics

Shares disposed 16,121 shares Tax-withholding disposition on September 11, 2026

Weighted average sale price $37.0932 per share Shares sold in multiple transactions to cover tax liability

Sale price range $36.35–$37.62 per share Range of prices for multiple transactions included in the disposition

Shares held after transaction 1,123,426 shares Directly owned by CEO Niccolo de Masi after September 11, 2026 transaction

Key Terms

restricted stock units ("RSUs"), weighted average price, tax liability

3 terms

restricted stock units ("RSUs") financial

"in connection with the vesting of restricted stock units ("RSUs")"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

tax liability financial

"sold to satisfy the Reporting Person's tax liability in connection"

FAQ

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

What insider transaction did IonQ (IONQ) disclose for CEO Niccolo de Masi?

IonQ disclosed that CEO Niccolo de Masi disposed of 16,121 shares of common stock on September 11, 2026 in a tax-withholding transaction related to the vesting of restricted stock units.

Was the IonQ (IONQ) CEO’s Form 4 transaction an open-market sale?

No. The filing states the shares were sold to satisfy tax liability arising from the vesting of restricted stock units (RSUs), rather than a discretionary open-market sale for investment purposes.

What price range applied to the IonQ (IONQ) CEO’s reported share disposition?

The reported weighted average price was $37.0932 per share. Footnotes explain the 16,121 shares were sold in multiple transactions at prices ranging from $36.35 to $37.62, inclusive.

How many IonQ (IONQ) shares does CEO Niccolo de Masi hold after this transaction?

After the September 11, 2026 transaction, CEO Niccolo de Masi directly holds 1,123,426 shares of IonQ common stock, as reported in the Form 4.

Was the IonQ (IONQ) CEO’s Form 4 transaction under a Rule 10b5-1 trading plan?

No. The filing does not indicate use of a Rule 10b5-1 plan, and the plan-related checkbox is not affirmed; the transaction is characterized only as a tax-liability-related disposition tied to RSU vesting.

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

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Available on EDGAR 09/15/2026 - 09:50 PM Accepted by SEC EDGAR 09/15/2026 - 09:50 PM Learn about SEC filing dates

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

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^*

de Masi Niccolo

(Last) (First) (Middle)

C/O IONQ, INC.

4505 CAMPUS DRIVE

(Street)

COLLEGE PARK MARYLAND 20740

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
IonQ, Inc. [ IONQ ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2026

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

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/11/2026		F(1)		16,121	D	$37.0932(2)	1,123,426	D

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

Explanation of Responses:

1. The reported securities were sold to satisfy the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.62, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	/s/ Tyler T. Rosenbaum, Assistant Secretary, by Power of Attorney	09/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)