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  4. [Form 4] IonQ, Inc. Insider Trading Activity

IonQ (IONQ) director Cardillo sells shares, exercises options under 10b5-1

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

IonQ, Inc. director Robert T. Cardillo reported several equity transactions in late February 2026. He exercised stock options for 2,500 shares of common stock at a price of $11.24 per share and now holds 15,047 options.

On February 26, 2026, he sold 5,165 common shares in open-market transactions at a weighted average price of about $39.44, and on February 27, 2026 a further 3,071 shares were disposed of to cover tax liabilities from restricted stock unit vesting. These trades were executed under a Rule 10b5-1 trading plan adopted and later amended by the reporting person, and he directly owned 109,220 common shares after the latest transaction.

Positive

  • None.

Negative

  • None.
Insider Cardillo Robert T.
Role Director
Sold 5,165 shs ($204K)
Type Security Shares Price Value
Tax Withholding Common Stock 3,071 $39.1924 $120K
Exercise Stock Option (Right to Buy) 2,500 $0.00 --
Exercise Common Stock 2,500 $11.24 $28K
Sale Common Stock 5,165 $39.4356 $204K
Holdings After Transaction: Common Stock — 109,220 shares (Direct); Stock Option (Right to Buy) — 15,047 shares (Direct)
Footnotes (1)
  1. The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 12, 2025 and amended on June 13, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.00 to $39.90, 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. The reported securities were sold to satisfy the Reporting Person's tax liability in connection with the vesting of restricted stock units. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.1392 to $39.20, 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. One-third of the shares subject to the option vested or will vest on February 26, 2025 and each one-year anniversary thereafter, subject to the Reporting Person's continued service through each such vesting date.
Form 4 Insider Transactions: What Each Field Means →
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).
X
 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*
Cardillo Robert T.
(Last) (First) (Middle)
C/O IONQ, INC.
4505 CAMPUS DRIVE
(Street)
COLLEGE PARK MD 20740
(City) (State) (Zip)
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
Officer (give title below) X Other (specify below)
Executive Chair, IonQ Federal
3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026
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 02/26/2026 M(1) 2,500 A $11.24 117,456 D
Common Stock 02/26/2026 S(1) 5,165 D $39.4356(2) 112,291 D
Common Stock 02/27/2026 F(3) 3,071 D $39.1924(4) 109,220 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
Stock Option (Right to Buy) $11.24 02/26/2026 M 2,500 (5) 02/26/2034 Common Stock 26,320 $0 15,047 D
Explanation of Responses:
1. The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 12, 2025 and amended on June 13, 2025.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.00 to $39.90, 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.
3. The reported securities were sold to satisfy the Reporting Person's tax liability in connection with the vesting of restricted stock units.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.1392 to $39.20, 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.
5. One-third of the shares subject to the option vested or will vest on February 26, 2025 and each one-year anniversary thereafter, subject to the Reporting Person's continued service through each such vesting date.
/s/ Tyler T. Rosenbaum, Assistant Secretary, by Power of Attorney 02/27/2026
** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did IonQ (IONQ) director Robert Cardillo report?

Robert T. Cardillo reported exercising options for 2,500 IonQ shares and selling 5,165 shares in open-market trades, plus 3,071 shares disposed to cover tax from restricted stock units, all detailed as direct ownership transactions.

How many IonQ (IONQ) shares did Robert Cardillo sell and at what prices?

He sold 5,165 IonQ common shares at a weighted average price of about $39.44, with individual trades ranging between $39.00 and $39.90, plus 3,071 shares around $39.19 to satisfy tax obligations from restricted stock unit vesting.

Were Robert Cardillo’s IonQ (IONQ) share sales pre-planned under Rule 10b5-1?

Yes. The filing states the reported transactions were executed under a Rule 10b5-1 trading plan adopted on March 12, 2025 and amended on June 13, 2025, indicating a pre-arranged framework for these trades rather than discretionary, ad hoc sales.

How many IonQ (IONQ) shares does Robert Cardillo own after these transactions?

Following the most recent reported transaction, Robert T. Cardillo directly owns 109,220 shares of IonQ common stock. He also holds 15,047 stock options after exercising 2,500 options as part of the activity described in this Form 4 filing.

Why did Robert Cardillo dispose of some IonQ (IONQ) shares for tax purposes?

A portion of the reported sales, totaling 3,071 shares, was used to satisfy his tax liability arising from the vesting of restricted stock units. Such tax-withholding dispositions are common when equity awards convert into taxable income.

What do the weighted average prices in Robert Cardillo’s IonQ (IONQ) trades mean?

The filing reports weighted average sale prices, meaning shares were sold in multiple trades within stated price ranges. For example, some sales ranged from $39.00 to $39.90, and the insider offers to provide exact breakdowns of shares sold at each price upon request.