DUOLDuolingo, Inc. · Insider ownership research

Duolingo, Inc. insiders sold $50.6M in the past 12 months. How much of their stake is that?

98% was sold under disclosed trading plans, 2% to cover taxes. The largest seller, Luis von Ahn (President & CEO, Co-Founder, Director), sold $34.1M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why

Updated Oct 16, 2026 from SEC filings · covers Oct 17, 2025 to Oct 16, 2026

1

buyer among officers and directors (1 trade), past 12 months

98%

of sales were under disclosed trading plans, past 12 months

7 of 15

officers and directors sold shares, past 12 months

Is this normal? Less than usual: about half of the 4-year average. 7 insiders sold; the average is 8 a year. Year by year

Latest filing: Filed Oct 13 for a stock award on Oct 10. Mario Schlosser received an award of 116 shares. Filing

SEC ownership filings: 59 filed in the 12 months to Oct 16, 2026; 466 on record since Jul 27, 2021 · See the evidence

What stands out

James Shelton bought 5K shares for $499K, first on Mar 3, 2026. These are the first purchases by current officers or directors in the filings on record.Purchase, Mar 3, 2026

Selling rose in the last 90 days but the year remains well below the 4-year average: officers and directors sold 251K shares, against an average of 23K per 90 days earlier in the period. Most of it was Luis von Ahn (226K shares in the last 90 days) and William Gordon (10K shares in the last 90 days); 99% of these sales were under disclosed plans.Luis von Ahn: largest recent sale, Oct 7, 2026 · William Gordon: largest recent sale, Sep 8, 2026

Tax withholding outweighed market sales: the company withheld $60.5M of officers' and directors' shares for taxes, against $50.6M sold on the open market. The largest was Luis von Ahn ($37.7M withheld).Largest withholding, Oct 20, 2025

A share of stake is shown for 0 of the 7 officers and directors who sold. 15 are left out

i

Left out: Luis von Ahn, Severin Hacker, Robert Meese, Natalie Glance, William Gordon, Matthew Skaruppa, Stephen Chen, John Lilly III, Amy Bohutinsky, James Shelton, Sara Clemens, Gillian Munson, Mario Schlosser, Bonnie Ross and Sallie Krawcheck (share of stake is being verified).

Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

Luis von Ahn

President & CEO, Co-Founder, Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$34.1MDisclosed plan

Severin Hacker

Chief Tech Officer, Co-Founder, Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$7.5MDisclosed plan

Natalie Glance

Chief Engineering Officer

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$2.6MDisclosed plan

Stephen Chen

General Counsel

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$2.5M95% planned, 5% to cover taxes

Matthew Skaruppa

Chief Financial Officer

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$1.7MDisclosed plan

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planTo cover taxesOne dollar scale for every month; the tallest bar is labeled

Recent activity

Past 30 days, Sep 17, 2026 to Oct 16, 2026

Oct 7, 2026Luis von Ahn sold 110K shares ($16.7M) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Luis von Ahn President & CEO, Co-Founder, Director	110,046	$151.70	n/a	n/a	Oct 7, 2026	Oct 9, 2026

Sep 24, 2026Luis von Ahn sold 47K shares ($7.0M) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Luis von Ahn President & CEO, Co-Founder, Director	46,682	$150.63	n/a	n/a	Sep 24, 2026	Sep 28, 2026

Sep 22, 2026Luis von Ahn sold 3.6K shares ($549K) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Luis von Ahn President & CEO, Co-Founder, Director	3,614	$151.91	n/a	n/a	Sep 22, 2026	Sep 23, 2026

Sep 21, 2026Luis von Ahn sold 37K shares ($5.6M) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Luis von Ahn President & CEO, Co-Founder, Director	37,366	$150.53	n/a	n/a	Sep 21, 2026	Sep 23, 2026

Share-class conversions: 4 conversions, 197,708 shares Class B → Class A. A conversion is not a sale; the combined stake does not change.

"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Common questions

Is the Duolingo, Inc. CEO selling stock?

Yes. Luis von Ahn sold 226K shares ($34.1M) in the past 12 months, all of it under a trading plan disclosed in the filings.

Why are Duolingo, Inc. insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 98% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 2% were to cover taxes. A trading plan schedules sales in advance.

Are any Duolingo, Inc. insiders buying?

Yes. 1 officer or director reported 1 purchase in the past 12 months (Form 4 code P; rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust are not counted).

The evidence

Who sold7 officers and directors: amount, % of holdings, trading plan

Who sold	Amount	% of holdings	Trading plan
Luis von Ahn President & CEO, Co-Founder, Director	$34.1M 226K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Severin Hacker Chief Tech Officer, Co-Founder, Director	$7.5M 30K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Natalie Glance Chief Engineering Officer	$2.6M 20K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Stephen Chen General Counsel	$2.5M 17K shares	Not confirmed share of stake is being verified. Why	95% under a disclosed plan, 5% to cover taxes
Matthew Skaruppa Chief Financial Officer	$1.7M 12K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
William Gordon Director	$1.5M 10K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Robert Meese Chief Business Officer	$701K 5.2K shares	Not confirmed share of stake is being verified. Why	To cover taxes

The full ownership picture0 of 15 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

Insider

Held Oct 16, 2025

Sold

Held Oct 16, 2026

Still held

Luis von Ahn

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Luis von Ahn are complete.

President & CEO, Co-Founder, Director

n/a

−226K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Luis von Ahn

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Luis von Ahn are complete; balances and unit counts will be added when the check is finished.

−50Kgifted (net of own trusts)

−212Kwithheld by the company for taxes

Severin Hacker

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Severin Hacker are complete.

Chief Tech Officer, Co-Founder, Director

n/a

−30K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Severin Hacker

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Severin Hacker are complete; balances and unit counts will be added when the check is finished.

−50Kgifted (net of own trusts)

−126Kwithheld by the company for taxes

Robert Meese

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Meese are complete.

Chief Business Officer

n/a

−5.2K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Robert Meese

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Meese are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Natalie Glance

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Natalie Glance are complete.

Chief Engineering Officer

n/a

−20K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Natalie Glance

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Natalie Glance are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
8,215	$2.23	Feb 27, 2025	$1.2M
5,000	$7.11	Apr 20, 2028	$731K

Estimate: options held × ($153.26 − strike price), using the most recent insider trade price on Form 4 (Oct 7, 2026), not a market close.

William Gordon

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for William Gordon are complete.

Director

n/a

−10K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for William Gordon

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for William Gordon are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Matthew Skaruppa

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Matthew Skaruppa are complete.

Chief Financial Officer

n/a

−12K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Matthew Skaruppa

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Matthew Skaruppa are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stephen Chen

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Stephen Chen are complete.

General Counsel

n/a

−17K

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Stephen Chen

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Stephen Chen are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

John Lilly III

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for John Lilly III are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for John Lilly III

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for John Lilly III are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Amy Bohutinsky

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Amy Bohutinsky are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Amy Bohutinsky

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Amy Bohutinsky are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
25,000	$16.27	Jun 10, 2030	$3.4M

Estimate: options held × ($153.26 − strike price), using the most recent insider trade price on Form 4 (Oct 7, 2026), not a market close.

James Shelton

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for James Shelton are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for James Shelton

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for James Shelton are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Sara Clemens

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Sara Clemens are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Sara Clemens

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Sara Clemens are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Gillian Munson

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Gillian Munson are complete.

Chief Financial Officer

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Gillian Munson

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Gillian Munson are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
20,000	$8.15	Sep 25, 2029	$2.9M

Estimate: options held × ($153.26 − strike price), using the most recent insider trade price on Form 4 (Oct 7, 2026), not a market close.

Mario Schlosser

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Mario Schlosser are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Mario Schlosser

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mario Schlosser are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Bonnie Ross

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Bonnie Ross are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Bonnie Ross

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Bonnie Ross are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Sallie Krawcheck

!

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Sallie Krawcheck are complete.

Director

n/a

0

n/a

n/a

Vesting, gifts, unvested awards and holding lines for Sallie Krawcheck

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Sallie Krawcheck are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Holdings and share of stake for Duolingo, Inc. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$50.6M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $50.6M across 320,288 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

Disclosed plan · $49.8M · 98%

2%

The lighter segment is sales with no plan disclosed in the filing ($833K), including tax-related sales outside a plan.

Taxes

$3.2M of sales (6.3%) cite tax obligations in their footnotes, $2.3M of them also under a plan. Separately, 338,105 shares ($60.5M) were withheld by the company for taxes, which isn't a market sale. Example: Stephen Chen, Aug 17, 2026

Purchases · 1 buyer (1 trade)

1 officer or director bought shares in this period, in 1 trade(Form 4 code P, leaving out rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust). Across all their filings on record there is 1 purchase trade.

Seller	Shares sold	Proceeds	Under a disclosed plan	Share of total	Sales dates
Luis von Ahn President & CEO, Co-Founder, Director	226K	$34.1M	100%	67%	Sep 16, 2026 to Oct 7, 2026
Severin Hacker Chief Tech Officer, Co-Founder, Director	30K	$7.5M	100%	15%	Oct 20, 2025 to Nov 19, 2025
Natalie Glance Chief Engineering Officer	20K	$2.6M	100%	5%	Nov 17, 2025 to Aug 18, 2026
Stephen Chen General Counsel	17K	$2.5M	95%	5%	Nov 17, 2025 to Sep 14, 2026
Matthew Skaruppa Chief Financial Officer	12K	$1.7M	100%	3%	Nov 17, 2025 to Feb 18, 2026
William Gordon Director	10K	$1.5M	100%	3%	Sep 8, 2026 to Sep 8, 2026
Robert Meese Chief Business Officer	5.2K	$701K	0%	1%	Nov 17, 2025 to Aug 17, 2026

Sales by month

Month	Sale proceeds	Disclosed plan	To cover taxes	No plan disclosed
Oct 2025	$3.1M	$3.1M	$0	$0
Nov 2025	$7.0M	$6.8M	$257K	$0
Dec 2025	$0	$0	$0	$0
Jan 2026	$0	$0	$0	$0
Feb 2026	$1.7M	$1.6M	$110K	$0
Mar 2026	$0	$0	$0	$0
Apr 2026	$0	$0	$0	$0
May 2026	$1.1M	$915K	$159K	$0
Jun 2026	$0	$0	$0	$0
Jul 2026	$0	$0	$0	$0
Aug 2026	$874K	$567K	$307K	$0
Sep 2026	$20.1M	$20.1M	$0	$0
Oct 2026	$16.7M	$16.7M	$0	$0

Is this normal? Selling year by year4 earlier years to compare with

Less than usual: about half of the 4-year average. 7 insiders sold; the average is 8 a year.

12 months ending	Shares sold	Insiders who sold	Proceeds
Oct 16, 2026 Latest 12 months	320K	7	$50.6M
Oct 16, 2025 1 year earlier	877K	8	$307M
Oct 16, 2024 2 years earlier	532K	9	$109M
Oct 17, 2023 3 years earlier	512K	9	$64.5M
Oct 17, 2022 4 years earlier	553K	7	$59.6M
Oct 17, 2021 5 years earlier · filings don't cover the whole year	50K	1	$5.1M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertainty15 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Duolingo, Inc. are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology466 filings on record, 59 filed in the 12-month period, and how we read them

All 466 Forms 3, 4 and 5 on record for Duolingo, Inc. (SEC CIK 1562088), filed from Jul 27, 2021 to Oct 13, 2026; 59 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (6)No filing in 18 months; last reported balances, not in any total

Name	Last filed	Last reported balance
Durable Capital Partners LP	Nov 13, 2023	6,516,387 shares, last reported balance as of Nov 9, 2023
Laela Sturdy	Jun 20, 2023	4,253 shares, last reported balance as of Jun 15, 2023
CapitalG 2014 LP	Jul 15, 2022	2,637,511 shares, last reported balance as of Jul 13, 2022
NewView Capital Fund I, L.P.	Jul 12, 2022	2,246,422 shares, last reported balance as of Jul 8, 2022
KPCB DGF Associates, LLC	Mar 9, 2022	4,200,398 shares, last reported balance as of Mar 7, 2022
Union Square Ventures 2012 Fund, L.P.	Dec 22, 2021	1,847,123 shares, last reported balance as of Nov 15, 2021

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