Grid Dynamics (GDYN) COO sells 4,435 pre-planned shares at $8

Rhea-AI Filing Summary

GRID DYNAMICS HOLDINGS, INC. chief operating officer Yury Gryzlov reported an open-market sale of 4,435 shares of Common Stock at $8.00 per share. After this transaction, he directly holds 514,948 shares. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 13, 2025, indicating it was scheduled in advance rather than timed discretionarily.

Insider Trade Summary 10b5-1

Net Seller: 4,435 shares ($35,480)

Net Sell 1 txn

Insider Gryzlov Yury

Role CHIEF OPERATING OFFICER

Sold 4,435 shs ($35K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,435	$8.00	$35K

Holdings After Transaction: Common Stock — 514,948 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 4,435 shares Sale price: $8.00 per share Shares held after sale: 514,948 shares +2 more

5 metrics

Shares sold 4,435 shares Open-market sale by COO Yury Gryzlov

Sale price $8.00 per share Price for Common Stock sold

Shares held after sale 514,948 shares Direct ownership following transaction

Transaction code S Sale in open market or private transaction

Trading plan adoption date November 13, 2025 Rule 10b5-1 plan used for this sale

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..."

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 →

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)
06/01/2026

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	06/01/2026		S		4,435(1)	D	$8	514,948	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	06/01/2026
	** 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)

FAQ

What insider transaction did GRID DYNAMICS (GDYN) report for Yury Gryzlov?

GRID DYNAMICS reported that chief operating officer Yury Gryzlov sold 4,435 shares of Common Stock in an open-market transaction at $8.00 per share, according to a Form 4 insider filing.

How many GRID DYNAMICS (GDYN) shares does Yury Gryzlov hold after this sale?

After the reported transaction, Yury Gryzlov directly holds 514,948 shares of GRID DYNAMICS Common Stock, as disclosed in the Form 4, providing context on his remaining equity position after the sale.

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

Yes. The filing states the 4,435-share sale by GDYN’s chief operating officer occurred pursuant to a Rule 10b5-1 trading plan adopted on November 13, 2025, indicating the transaction was pre-planned rather than opportunistically timed.

What price did GRID DYNAMICS (GDYN) COO receive per share in the sale?

The Form 4 shows that GRID DYNAMICS chief operating officer Yury Gryzlov sold 4,435 shares of Common Stock at a price of $8.00 per share in an open-market transaction on the reported date.

Is the GDYN COO’s Form 4 transaction a buy or sell action?

The Form 4 transaction is a sell action. It records an open-market sale of 4,435 shares of GRID DYNAMICS Common Stock by chief operating officer Yury Gryzlov, coded as an “S” transaction in the filing.