Grid Dynamics (GDYN) COO Yury Gryzlov sells 3,930 shares in planned trade

Rhea-AI Filing Summary

GRID DYNAMICS HOLDINGS, INC. Chief Operating Officer Yury Gryzlov reported a sale of 3,930 shares of Common Stock on August 13, 2026 at $8.00 per share in an open market or private transaction. After this transaction, he directly holds 508,087 shares, and the sale was made under a Rule 10b5-1 trading plan adopted on November 13, 2025.

Insider Trade Summary 10b5-1

Net Seller: 3,930 shares

Net Sell 1 txn

Insider Gryzlov Yury

Role CHIEF OPERATING OFFICER

Sold 3,930 shs ($31K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	3,930	$8.00	$31K

Holdings After Transaction: Common Stock — 508,087 shares (Direct)

Footnotes (1)

1. F1. These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 13, 2025.

Key Figures

Shares sold: 3,930 shares Sale price per share: $8.00 per share Shares owned after transaction: 508,087 shares +1 more

4 metrics

Shares sold 3,930 shares Common Stock sale on August 13, 2026

Sale price per share $8.00 per share Price for the 3,930 Common Stock shares sold

Shares owned after transaction 508,087 shares Directly held Common Stock following the sale

Net shares sold in filing 3,930 shares Net sell direction across all reported transactions

Key Terms

Rule 10b5-1 trading plan, Common Stock, open market or private transaction

3 terms

Rule 10b5-1 trading plan regulatory

"These shares were sold pursuant to a Rule 10b5-1 trading plan adopted"

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.

Common Stock financial

"security_title: Common Stock, transaction in issuer’s equity"

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.

open market or private transaction financial

"transaction_code_description: Sale in open market or private transaction"

FAQ

What insider transaction did GDYN COO Yury Gryzlov report?

Yury Gryzlov reported selling 3,930 shares of GRID DYNAMICS HOLDINGS, INC. Common Stock at $8.00 per share on August 13, 2026, in an open market or private transaction.

How many GDYN shares does Yury Gryzlov own after this sale?

After the reported transaction, Yury Gryzlov directly holds 508,087 shares of GRID DYNAMICS HOLDINGS, INC. Common Stock, as disclosed in the ownership figure following the sale.

Was the GDYN COO’s August 13, 2026 stock sale under a 10b5-1 plan?

Yes, the sale of 3,930 shares by GDYN Chief Operating Officer Yury Gryzlov was executed under a Rule 10b5-1 trading plan adopted on November 13, 2025, according to the footnote.

What price did GDYN’s COO receive per share in the reported sale?

The reported transaction shows a sale price of $8.00 per share for the 3,930 shares of GRID DYNAMICS HOLDINGS, INC. Common Stock sold on August 13, 2026.

Is the reported GDYN insider transaction a purchase or a sale?

The transaction is a sale of Common Stock. Yury Gryzlov disposed of 3,930 shares, coded as a sale in an open market or private transaction, reducing his holdings to 508,087 shares.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/13/2026 - 06:00 PM Accepted by SEC EDGAR 08/13/2026 - 06:00 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).

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^*

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)
08/13/2026

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	08/13/2026		S		3,930(1)	D	$8	508,087	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. 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	08/13/2026
	** 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)