Grid Dynamics COO sells 467 shares in planned trade

GRID DYNAMICS HOLDINGS, INC. chief operating officer Yury Gryzlov reported an open-market sale of Common Stock.

Rhea-AI Filing Summary

GRID DYNAMICS HOLDINGS, INC. chief operating officer Yury Gryzlov reported an open-market sale of Common Stock. He sold 467 shares at $6.45 per share. After this transaction, he directly owns 519,383 shares, so the sale represents a very small portion of his holdings.

The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 13, 2025, meaning it was scheduled in advance rather than timed discretionarily. This filing mainly updates investors on a routine, planned insider sale with the executive retaining a large remaining stake.

Insider Trade Summary 10b5-1

Net Seller: 467 shares

Net Sell 1 txn

Insider Gryzlov Yury

Role CHIEF OPERATING OFFICER

Sold 467 shs ($3K)

Type	Security	Shares	Price	Value
Sale	Common Stock	467	$6.45	$3K

Holdings After Transaction: Common Stock — 519,383 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: 467 shares Sale price: $6.45 per share Shares owned after: 519,383 shares +3 more

6 metrics

Shares sold 467 shares Open-market sale of Common Stock

Sale price $6.45 per share Price for the 467-share sale

Shares owned after 519,383 shares Direct holdings post-transaction

Net shares sold 467 shares Net-sell direction in transaction summary

Transaction date May 15, 2026 Date of Common Stock sale

10b5-1 plan adoption November 13, 2025 Date trading plan was adopted

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.

FAQ

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

What insider transaction did GDYN COO Yury Gryzlov report?

GDYN’s COO Yury Gryzlov reported an open-market sale of 467 shares of Common Stock. The shares were sold at a price of $6.45 each, and the transaction was disclosed in a Form 4 insider trading report.

At what price did the GDYN COO sell his shares?

The GDYN COO sold his 467 Common Stock shares at $6.45 per share. This price reflects the execution level for the reported open-market transaction and forms the basis for calculating the total value of the sale.

How many GDYN shares does the COO hold after this sale?

After the sale, the GDYN COO directly owns 519,383 shares of Common Stock. This indicates the transaction was small relative to his overall holdings, with only a minor fraction of his position being sold.

Was the GDYN insider sale made under a Rule 10b5-1 plan?

Yes, the insider sale was made under a Rule 10b5-1 trading plan. The footnote states the plan was adopted on November 13, 2025, indicating the trade was pre-arranged rather than an opportunistic market-timing decision.

Does the GDYN Form 4 show any option exercises or derivatives?

No, this GDYN Form 4 only reports a non-derivative Common Stock sale. The derivative summary is empty, and transaction data show a single open-market sale with no option exercises or other derivative-related transactions.

Is this GDYN insider transaction primarily a buy or a sell?

The GDYN insider transaction is a sale. The Form 4 classifies it as an open-market sale of 467 Common Stock shares, and the transaction summary shows net-sell activity with no reported purchases or acquisitions.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:46 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)
05/15/2026

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	05/15/2026		S		467(1)	D	$6.45	519,383	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	05/15/2026
	** 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)