Director sells 2,927 shares of RRGB

Sarah A. Mussetter reported a proposed sale of 2,927 shares of common stock of RRGB.

Rhea-AI Filing Summary

Sarah A. Mussetter reported a proposed sale of 2,927 shares of common stock of RRGB. The filing lists the sale date as 03/23/2026 with proceeds of $9,424.94. The notice also lists prior issuer awards and plan-origin shares including grants dated 02/17/2019 and 12/28/2025.

Insights

Insider Transactions Compliance

Routine Rule 144 notice of insider sale; limited market signal.

The filing registers a proposed resale under Rule 144 showing 2,927 shares offered on 03/23/2026 with listed proceeds of $9,424.94. This form is a regulatory notice and does not itself execute a market trade.

Timing, whether the sale occurred, and the recipient of proceeds are not specified in the excerpt; subsequent trading reports or Form 4/5 would confirm completion.

Key Figures

Filed sale shares: 2,927 shares Proceeds listed: $9,424.94 Broker/Filer: Morgan Stanley Smith Barney LLC +2 more

5 metrics

Filed sale shares 2,927 shares proposed sale date <date>03/23/2026</date>

Proceeds listed $9,424.94 associated with the 2,927-share sale

Broker/Filer Morgan Stanley Smith Barney LLC Executive Financial Services, 1 New York Plaza

Restricted Stock grant 28,691 shares grant dated <date>02/17/2019</date>

Performance Shares 3,161 shares award dated <date>12/28/2025</date>

Key Terms

Rule 144, Restricted Stock, Performance Shares, Employee Stock Purchase Plan

4 terms

Rule 144 regulatory

"Securities To Be Sold / Securities Sold During The Past 3 Months"

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.

Restricted Stock financial

"Common | 02/17/2019 | Restricted Stock"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Performance Shares financial

"Common | 12/28/2025 | Performance Shares"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

Employee Stock Purchase Plan financial

"Common | 06/30/2021 | Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

FAQ

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

What does the Form 144 for RRGB show?

The Form 144 lists a proposed sale of 2,927 shares by Sarah A. Mussetter on 03/23/2026. It reports proceeds of $9,424.94 and notes prior issuer awards dated 02/17/2019 and 12/28/2025.

Does this Form 144 confirm the shares were sold?

No. The Form 144 is a notice of a proposed sale under Rule 144. It reports the intended sale date 03/23/2026 and proceeds figure, but execution and settlement are not confirmed in this excerpt.

Who is the filer or broker listed on the RRGB filing?

The filing shows Morgan Stanley Smith Barney LLC, Executive Financial Services at 1 New York Plaza as the broker/filing intermediary associated with the notice, per the excerpt provided.

What types of issuer awards are listed in the notice?

The excerpt lists several issuer-origin securities: Employee Stock Purchase Plan entries, a Restricted Stock grant (dated 02/17/2019), and Performance Shares (dated 12/28/2025), with associated share counts shown.

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

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Accepted by SEC EDGAR 06/16/2026 - 05:48 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	0001481286
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	RED ROBIN GOURMET BURGERS, INC.
SEC File Number	001-34851
Address of Issuer	10000 E. Geddes Avenue, Suite 500 Englewood COLORADO 80112
Phone	(303) 846-6000
Name of Person for Whose Account the Securities are To Be Sold	SARAH A MUSSETTER
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	32021	185213.40	18499651	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	06/30/2021	Employee Stock Purchase Plan	Issuer			60	06/30/2021	Not Applicable
Common	06/30/2020	Employee Stock Purchase Plan	Issuer			109	06/30/2020	Not Applicable
Common	02/17/2019	Restricted Stock	Issuer			28691	02/17/2019	Not Applicable
Common	12/28/2025	Performance Shares	Issuer			3161	12/28/2025	Not Applicable

* 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
SARAH A MUSSETTER 10000 E. Geddes Avenue, Suite 500 Englewood CO 80112	Common	03/23/2026	2927	9424.94

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock during the period of 02/17/2019 through 12/08/2025.
Date of Notice	06/16/2026
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/ Sarah A. Mussetter
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)