IPG Photonics holder to sell $909K in stock

IPG PHOTONICS CORP (IPGP) is the issuer for a proposed resale of common stock under Rule 144 by the Valentin Gapontsev Trust.

Rhea-AI Filing Summary

IPG PHOTONICS CORP (IPGP) is the issuer for a proposed resale of common stock under Rule 144 by the Valentin Gapontsev Trust. The notice covers 11,688 shares of common stock to be sold through Stifel Nicolaus & Company Inc., with an approximate aggregate market value of $909,072 as of September 22, 2026, when 42,534,539 shares were outstanding and the stock was listed on Nasdaq.

The trust acquired these shares on December 28, 1999 for cash. During the prior three months, the trust reported additional Rule 144 sales of IPG Photonics common stock in three transactions of 4,292 shares, 555 shares, and 2,367 shares, respectively.

Key Figures

Shares to be sold under Rule 144: 11,688 shares Approximate aggregate market value of shares to be sold: $909,072 Shares outstanding: 42,534,539 shares +4 more

7 metrics

Shares to be sold under Rule 144 11,688 shares Common stock to be sold by Valentin Gapontsev Trust via Stifel

Approximate aggregate market value of shares to be sold $909,072 Value of 11,688 shares as of September 22, 2026

Shares outstanding 42,534,539 shares IPG Photonics common stock outstanding as of September 22, 2026

Acquisition date of shares December 28, 1999 Date the trust acquired the shares being sold

Prior sale on July 22, 2026 4,292 shares for $434,053 Common stock sold by Valentin Gapontsev Trust II

Prior sale on August 26, 2026 555 shares for $41,647 Common stock sold by Valentin Gapontsev Trust II

Prior sale on August 27, 2026 2,367 shares for $178,763 Common stock sold by Valentin Gapontsev Trust II

Key Terms

Rule 144, aggregate market value, Nasdaq

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"Common Stock | Stifel Nicolaus & Company Inc ... 11688 | 909072.00"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Nasdaq market

"42534539 | 09/22/2026 | Nasdaq"

The Nasdaq is a stock exchange where many companies' shares are bought and sold, functioning much like a marketplace for investments. It matters to investors because it provides a platform to buy and sell ownership stakes in companies, helping them track the value of those companies and make informed decisions. As one of the largest and most technology-focused markets, it also reflects trends and developments in the business world.

FAQ

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

What does the Form 144 filing disclose for IPGP?

The filing discloses that the Valentin Gapontsev Trust plans to sell 11,688 shares of IPG Photonics common stock under Rule 144 through Stifel Nicolaus & Company Inc., with an approximate aggregate market value of $909,072 as of September 22, 2026.

How many IPG Photonics (IPGP) shares are covered by this Form 144 notice?

The notice covers 11,688 shares of IPG Photonics common stock to be sold by the Valentin Gapontsev Trust through Stifel Nicolaus & Company Inc. under Rule 144.

What is the approximate value of the IPGP shares to be sold under this Form 144?

The 11,688 shares of IPG Photonics common stock covered by the notice have an approximate aggregate market value of $909,072 as of September 22, 2026.

How many IPG Photonics (IPGP) shares were outstanding when the Form 144 was filed?

As of September 22, 2026, IPG Photonics had 42,534,539 shares of common stock outstanding, as stated in the Form 144 filing.

What prior sales of IPGP stock did the Valentin Gapontsev Trust report in the last 3 months?

The trust reported three prior sales of IPG Photonics common stock: 4,292 shares for $434,053 on July 22, 2026; 555 shares for $41,647 on August 26, 2026; and 2,367 shares for $178,763 on August 27, 2026.

When were the IPG Photonics (IPGP) shares being sold by the trust originally acquired?

The shares covered by this Form 144 were acquired on December 28, 1999 as owned shares from the issuer for cash, according to the filing.

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

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Available on EDGAR 09/22/2026 - 04:01 PM Accepted by SEC EDGAR 09/22/2026 - 04:00 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001973250
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	IPG PHOTONICS CORP
SEC File Number	001-33155
Address of Issuer	377 SIMARANO DRIVE MARLBOROUGH MASSACHUSETTS 01752
Phone	5083731100
Name of Person for Whose Account the Securities are To Be Sold	Valentin Gapontsev Trust II
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Stifel Nicolaus & Company Inc 501 N Broadway St. Louis MO 63102	11688	909072.00	42534539	09/22/2026	Nasdaq

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	12/28/1999	Owned Shares	Issuer			11688	09/22/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Valentin Gapontsev Trust II 377 Simarano Drive Marlborough MA 01752	Common Stock	07/22/2026	4292	434053.00
Valentin Gapontsev Trust II 377 Simarano Drive Marlborough MA 01752	Common Stock	08/26/2026	555	41647.00
Valentin Gapontsev Trust II 377 Simarano Drive Marlborough MA 01752	Common Stock	08/27/2026	2367	178763.00

144: Remarks and Signature

Remarks
Date of Notice	09/22/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/17/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Azad Daswani, as a duly authorized representative of STIFEL, as attorney-in-fact for Valentin Gapontsev Trust II
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)