Duolingo (NASDAQ: DUOL) insider plans 1,539-share sale

Rhea-AI Filing Summary

Duolingo, Inc. (DUOL) received a Rule 144 notice from officer Natalie Glance covering a potential sale of Duolingo Class A common stock. The planned transaction involves 1,539 shares to be sold through Morgan Stanley Smith Barney LLC, relating to Restricted Stock Units with an acquisition date of 08/15/2026 and an anticipated sale date of 08/18/2026 on NASDAQ.

The notice also lists prior sales by Natalie Glance over the past three months, including the sale of 2,751 shares of common stock on 08/17/2026 for an aggregate amount of $355,239.66. This is a compliance filing indicating an intention and record of insider share sales rather than a change to Duolingo’s operations or financial results.

Key Figures

Planned shares to be sold: 1,539 shares Prior shares sold: 2,751 shares Aggregate amount of prior sale: $355,239.66 +2 more

5 metrics

Planned shares to be sold 1,539 shares Common stock covered by the Form 144 notice, related to RSUs acquired 08/15/2026

Prior shares sold 2,751 shares Common stock sold by Natalie Glance on 08/17/2026 in the past three months

Aggregate amount of prior sale $355,239.66 Total proceeds reported for the 2,751-share sale on 08/17/2026

Planned sale date 08/18/2026 Anticipated date of sale for 1,539 shares of Duolingo common stock on NASDAQ

Acquisition date of RSUs 08/15/2026 Acquisition date for the Restricted Stock Units underlying the 1,539 shares

Key Terms

Rule 144, Restricted Stock Units, Executive Financial Services

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.

Restricted Stock Units financial

"Common | 08/15/2026 | Restricted Stock Units | Issuer"

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.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

What does the Form 144 filing mean for Duolingo, Inc. (DUOL)?

The Form 144 shows that Natalie Glance, an officer of Duolingo, has notified of her intent to sell 1,539 shares of Duolingo common stock under Rule 144. It is a disclosure of potential insider sales, not a report on Duolingo’s business performance.

How many Duolingo (DUOL) shares is Natalie Glance planning to sell?

The notice covers a proposed sale of 1,539 shares of Duolingo common stock. These shares are tied to Restricted Stock Units with an acquisition date of 08/15/2026 and are expected to be sold on or about 08/18/2026 through Morgan Stanley Smith Barney LLC.

What Duolingo (DUOL) insider sales occurred in the last three months?

The filing reports that 2,751 shares of Duolingo common stock were sold by Natalie Glance on 08/17/2026 for an aggregate amount of $355,239.66. This transaction is disclosed as part of the three-month sales history required under Rule 144.

Who is the person selling Duolingo (DUOL) shares in this Form 144?

The Form 144 is filed for Natalie Glance, an officer of Duolingo, Inc. The filing covers her planned sale of 1,539 shares of Duolingo common stock, as well as her 2,751-share sale on 08/17/2026 disclosed in the three-month sales history.

Through which broker will the Duolingo (DUOL) shares be sold under this Form 144?

The proposed sale of 1,539 Duolingo shares is listed through Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, New York. The filing indicates that the shares are expected to be sold on NASDAQ on or about 08/18/2026.

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

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Available on EDGAR 08/18/2026 - 04:24 PM Accepted by SEC EDGAR 08/18/2026 - 04:24 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	0001870350
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	Duolingo, Inc.
SEC File Number	001-40653
Address of Issuer	5900 Penn Avenue Pittsburgh PENNSYLVANIA 15206
Phone	4125676602
Name of Person for Whose Account the Securities are To Be Sold	NATALIE GLANCE
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	1539	200316.24	40387012	08/18/2026	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	08/15/2026	Restricted Stock Units	Issuer			1539	08/15/2026	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
NATALIE GLANCE 5900 Penn Avenue Pittsburgh PA 15206	Common	08/17/2026	2751	355239.66

144: Remarks and Signature

Remarks
Date of Notice	08/18/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/15/2025
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/ Natalie Glance
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)