Douglas Knopper reports 10,766-share 10b5-1 sale

Douglas Knopper reported a sale of 10,766 shares under a pre-arranged 10b5-1 plan.

Rhea-AI Filing Summary

Douglas Knopper reported a sale of 10,766 shares under a pre-arranged 10b5-1 plan. The filing shows the sale occurred on 06/10/2026 with aggregate proceeds of $169,391.17. The filing also lists 37,337 Restricted Stock Units dated 06/28/2021 associated with the issuer.

Key Figures

Shares sold: 10,766 shares Aggregate proceeds: $169,391.17 Restricted Stock Units: 37,337 units +2 more

5 metrics

Shares sold 10,766 shares sale executed on 06/10/2026 under 10b5-1

Aggregate proceeds $169,391.17 proceeds reported for the 06/10/2026 sale

Restricted Stock Units 37,337 units RSUs dated 06/28/2021 listed in the securities section

Filing reference date 06/16/2026 date shown in filer information header

Broker identifier 37337 numeric broker/filing code shown in header

Key Terms

10b5-1, Restricted Stock Units, aggregate proceeds

3 terms

10b5-1 regulatory

"10b5-1 Sales for DOUGLAS KNOPPER 1250 Broadway"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 37337 | 06/28/2021"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

aggregate proceeds financial

"10766 | 169391.17"

FAQ

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

What did MGNI insider Douglas Knopper report?

Douglas Knopper reported a 10b5-1 sale of 10,766 shares executed on 06/10/2026, yielding $169,391.17. The filing names Morgan Stanley Smith Barney LLC as the broker and lists related Restricted Stock Units dated 06/28/2021.

How many shares were sold in the MGNI 10b5-1 transaction?

The reported transaction shows 10,766 shares sold on 06/10/2026. The filing pairs this share count with aggregate consideration of $169,391.17 and identifies the disposition method as a 10b5-1 sale.

What proceeds were reported for the MGNI insider sale?

The filing records aggregate proceeds of $169,391.17 from the sale dated 06/10/2026. The entry lists the proceeds alongside the number of shares sold and the 10b5-1 designation for the transaction.

Does the filing show any equity awards for MGNI?

Yes. The filing lists 37,337 Restricted Stock Units with a grant date of 06/28/2021. That RSU count is presented in the securities section of the excerpt and appears separate from the 10b5-1 sale entry.

Which broker handled the reported MGNI sale?

The excerpt lists Morgan Stanley Smith Barney LLC at 1 New York Plaza as the broker/dealer associated with the transaction. The filing pairs the broker information with the sale record dated 06/10/2026.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 06/16/2026 - 04:40 PM EDT 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	0001350876
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	MAGNITE, INC.
SEC File Number	001-36384
Address of Issuer	1250 Broadway, 9th Floor New York NEW YORK 10001
Phone	2122432769
Name of Person for Whose Account the Securities are To Be Sold	DOUGLAS KNOPPER
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	Director

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	37337	625394.75	143215003	06/16/2026	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	06/28/2021	Restricted Stock Units	Issuer			37337	06/28/2021	N/A

* 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
10b5-1 Sales for DOUGLAS KNOPPER 1250 Broadway, 9th Floor New York NY 10001	Common	06/10/2026	10766	169391.17

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 06/28/2021 through 06/05/2025.
Date of Notice	06/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/12/2025
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/ Douglas Knopper
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)