Was the GDYN COO’s share sale made under a Rule 10b5-1 trading plan?

Yes. A footnote states the shares were sold pursuant to a Rule 10b5-1 trading plan adopted by Yury Gryzlov on November 13, 2025. Such plans pre-schedule trades to promote orderly, systematic selling.

Grid Dynamics (GDYN) COO sells 1,245 shares under Rule 10b5-1 plan

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

GRID DYNAMICS HOLDINGS, INC. Chief Operating Officer Yury Gryzlov reported an open-market sale of 1,245 shares of Common Stock at $6.29 per share. The transaction occurred on July 2, 2026 under a pre-arranged Rule 10b5-1 trading plan adopted on November 13, 2025.

Following this sale, Gryzlov directly holds 512,017 shares, so the disposed amount represents only a small portion of his overall stake.

Insider Trade Summary 10b5-1

Net Seller: 1,245 shares ($7,831)

Net Sell 1 txn

Insider Gryzlov Yury

Role CHIEF OPERATING OFFICER

Sold 1,245 shs ($8K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,245	$6.29	$8K

Holdings After Transaction: Common Stock — 512,017 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 1,245 shares Sale price per share: $6.29 per share Shares held after transaction: 512,017 shares +2 more

5 metrics

Shares sold 1,245 shares Open-market sale of Common Stock on July 2, 2026

Sale price per share $6.29 per share Price for the 1,245 shares of Common Stock sold

Shares held after transaction 512,017 shares Direct ownership by COO Yury Gryzlov following the sale

Trading plan adoption date November 13, 2025 Date Gryzlov adopted the Rule 10b5-1 trading plan

Net share direction Net-sell of 1,245 shares Transaction summary shows net-sell direction

Key Terms

Rule 10b5-1 trading plan, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 13, 2025."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 07:25 PM Accepted by SEC EDGAR 07/02/2026 - 07:25 PM

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^*

Gryzlov Yury

(Last)

(First)

(Middle)

C/O GRID DYNAMICS HOLDINGS, INC.

6101 BOLLINGER CANYON ROAD, SUITE 465

(Street)

SAN RAMON

CALIFORNIA

94583

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GRID DYNAMICS HOLDINGS, INC. [ GDYN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/02/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	07/02/2026		S		1,245⁽¹⁾	D	$6.29	512,017	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 13, 2025.

Remarks:

	/s/Anil Doradla, by power of attorney	07/02/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did GDYN COO Yury Gryzlov report on this Form 4?

Yury Gryzlov reported selling 1,245 shares of Grid Dynamics Common Stock in an open-market transaction. The shares were sold at $6.29 per share and are reflected as a routine disposition in his direct holdings.

At what price did GDYN COO Yury Gryzlov sell his shares?

He sold 1,245 shares at $6.29 per share. This open-market transaction is recorded as a sale of Common Stock and helps define the dollar value of the trade without changing the share count calculations in the filing.

How many GDYN shares does Yury Gryzlov hold after this reported sale?

After the reported sale, Yury Gryzlov directly holds 512,017 shares of Grid Dynamics Common Stock. This shows the transaction reduced his position only modestly compared with his remaining ownership stake disclosed in the Form 4.

Does this GDYN Form 4 show any option exercises or derivative transactions?

No derivative transactions are listed in this Form 4. The derivativeSummary section is empty, indicating the reported activity consists solely of a non-derivative open-market sale of Common Stock by the chief operating officer.

Is this GDYN insider transaction categorized as a buy or a sell?

The transaction is categorized as a sell. It is coded “S” for sale, described as an open-market sale, and tagged with a net-sell direction in the transaction summary, reflecting 1,245 shares sold and none purchased.