Duolingo, Inc. Form 4 Filings

Duolingo, Inc. President & CEO and Co-Founder Luis von Ahn exercised options covering 46,682 shares on September 24, 2026, at an exercise price of $38.0800 per share. The options were fully vested and exercisable, and 110,046 shares subject to options were reported following the exercise. He converted the 46,682 Class B shares one-for-one into Class A Common Stock.

Von Ahn also sold 46,682 Class A shares in three entries on September 24, 2026: 38,758 shares at a weighted average price of $150.4501, 7,024 at $151.4220, and 900 at $152.2900. The sales were made under a Rule 10b5-1 trading plan adopted June 2, 2026.

Duolingo, Inc. President & CEO and Co-Founder Luis von Ahn exercised stock options on September 21 and 22, 2026, including options for 27,960 shares at $14.4200 and for 9,406 and 3,614 shares at $38.0800. The Class B shares were converted into Class A shares. He sold 40,980 Class A shares across those dates under a Rule 10b5-1 trading plan adopted June 2, 2026. On September 21, sales included 33,257 shares at a weighted average $150.4641 and 4,109 at a weighted average $151.0699; on September 22, sales included 200 shares at $150.0000 and 3,414 at $152.0200.

Duolingo, Inc. (DUOL) President & CEO and Co-Founder Luis von Ahn reported option exercises, share conversions, and sales on September 16, 2026. He exercised stock options for 23,040 shares at a $14.42 exercise price and 5,252 shares at $38.08, receiving Class B shares that were converted into Class A shares.

He then sold 27,272 Class A shares at a weighted average price of $150.1749 (in trades from $150.00–$150.54) and 1,020 Class A shares at a weighted average of $151.54 (from $151.53–$152.55), all under a Rule 10b5-1 trading plan adopted on June 2, 2026.

Duolingo, Inc. reported that its General Counsel, Stephen C. Chen, sold a total of 8,072 shares of Class A Common Stock on September 14, 2026. The sales were executed in two tranches at per-share prices of $147.43 and $150.00, and were effected pursuant to a Rule 10b5-1 trading plan adopted on June 14, 2026.

Duolingo, Inc. (DUOL) director William B Gordon reported selling 10,000 shares of Class A Common Stock on September 8, 2026 in multiple open-market transactions at weighted-average prices between about $143 and $152 per share. The sales were made under a Rule 10b5-1 trading plan adopted on June 9, 2026.

Duolingo, Inc. (symbol DUOL) reported that Chief Engineering Officer Natalie Glance disclosed several transactions in Duolingo Class A Common Stock. On August 17, 2026, 2,751 shares were automatically sold to satisfy tax withholding obligations upon vesting of restricted stock units. On August 18, 2026, she sold 502 shares at a weighted average price of $137.0094 and 1,037 shares at a weighted average price of $138.1870, both effected pursuant to her Rule 10b5-1 trading plan adopted on September 15, 2025. A separate entry reflects indirect ownership of 130 shares held "By son."

Duolingo, Inc. (DUOL) reports that Chief Business Officer Robert Meese sold 1,354 shares of Class A common stock on 2026-08-17 at $129.13 per share. According to a footnote, these shares were automatically sold to satisfy tax withholding obligations related to vesting restricted stock units. After this sale, Meese directly holds 169,391 shares of Class A common stock and also has indirect ownership interests through two qualified minor’s trusts.

Duolingo, Inc. (DUOL) reported that Stephen C. Chen, General Counsel, had 1,024 shares of Class A common stock sold on 2026-08-17 at $129.13 per share. According to the company disclosure, these shares were automatically sold to satisfy tax withholding obligations upon vesting of restricted stock units, and Chen now holds 51,841 shares directly.

KRAWCHECK SALLIE reported acquisition or exercise transactions in this Form 4 filing.

Duolingo, Inc. director Sallie Krawcheck reported two equity awards of Class A Common Stock in the form of restricted stock units (RSUs). One grant of 1,312 RSUs vests 100% on the earlier of the first anniversary of the August 10, 2026 grant date or the next annual stockholder meeting, subject to continued service. A separate grant of 3,280 RSUs vests over three years: one-half on August 10, 2027 and one-fourth on each of August 10, 2028 and August 10, 2029, also conditioned on continued service.

Shelton James H reported acquisition or exercise transactions in this Form 4 filing.

Duolingo director James H. Shelton received a fully vested grant of 120 restricted stock units tied to Class A Common Stock on July 10, 2026, in lieu of cash retainers under the Non-Employee Director Compensation Program. Each RSU represents one share, bringing his direct holdings to 11,753 shares.

Bohutinsky Amy reported acquisition or exercise transactions in this Form 4 filing.

Duolingo director Amy Bohutinsky received an equity compensation award of 130 fully vested restricted stock units (RSUs), each representing one share of Class A Common Stock, in lieu of cash retainers under the company’s Non-Employee Director Compensation Program. The award is valued at $124.76 per share and brings her direct holdings to 7,658 shares of Class A Common Stock.

Schlosser Mario reported acquisition or exercise transactions in this Form 4 filing.

Duolingo, Inc. director Mario Schlosser received an equity compensation award of 140 shares of Class A Common Stock through fully vested restricted stock units in lieu of cash retainers under the company’s Non-Employee Director Compensation Program, at a reported value of $124.76 per share, bringing his directly held stake to 4,262 shares.

Lilly III John Osborne reported acquisition or exercise transactions in this Form 4 filing.

Duolingo, Inc. director John Osborne Lilly III reported a compensatory equity award rather than an open-market trade. He received 118 fully vested restricted stock units (RSUs) of Class A Common Stock in lieu of cash retainers under the Amended and Restated Non-Employee Director Compensation Program. Each RSU represents one share to be settled on a date he selects under the program or as otherwise provided. Following this award, he directly holds 9,023 shares of Class A Common Stock.

Duolingo, Inc. General Counsel Stephen C. Chen exercised stock options to acquire 58 shares of Class A Common Stock at $14.42 per share. These options were fully vested and exercisable. Following the exercise, Chen directly holds 52,865 Class A shares. The corresponding stock option for 58 shares now shows zero remaining derivative balance, indicating a full exercise of that specific grant. No open-market sale or tax withholding transaction is reported in this filing, making it a small, routine compensation-related equity move.

Duolingo, Inc. director James H. Shelton received an equity grant of 2,001 restricted stock units (RSUs) tied to the company’s Class A Common Stock. The RSUs were granted at no cash cost and will convert into one share per unit when they vest.

All 2,001 RSUs vest 100% on the earlier of the first anniversary of the grant date or the next annual meeting of Duolingo’s stockholders, as long as Shelton continues to serve the company. Following this grant, he directly holds 11,633 shares of Class A Common Stock.

Clemens Sara reported acquisition or exercise transactions in this Form 4 filing.

Duolingo director Sara Clemens received an equity grant in the form of restricted stock units (RSUs). She was awarded 2,001 RSUs, each representing one share of Duolingo’s Class A Common Stock upon vesting. According to the terms, 100% of these RSUs vest on the earlier of the first anniversary of the grant date or the date of the next annual meeting of stockholders, as long as she continues serving the company. After this grant, Clemens directly holds 5,955 shares of Duolingo Class A Common Stock.

Bohutinsky Amy reported acquisition or exercise transactions in this Form 4 filing.

Duolingo director Amy Bohutinsky received an equity award in the form of restricted stock units. She was granted 2,001 RSUs representing shares of Duolingo Class A common stock, bringing her direct holdings to 7,528 shares after the award. The RSUs vest 100% on the earlier of the first anniversary of the grant date or the next annual stockholder meeting, as long as she continues serving the company.

Lilly III John Osborne reported acquisition or exercise transactions in this Form 4 filing.

Duolingo director John Osborne Lilly III received an equity award of 2,001 restricted stock units, each convertible into one share of Class A common stock upon vesting. After this grant, he directly holds 8,905 shares. All RSUs vest 100% on the earlier of the first anniversary of the grant date or the next annual stockholder meeting, assuming continued service.

Duolingo director William B. Gordon received an equity grant of 2,001 restricted stock units (RSUs) for Class A Common Stock. The award was granted at no cash cost and increases his direct holdings to 78,415 shares following the transaction.

The RSUs vest 100% on the earlier of the first anniversary of the grant date or the date of Duolingo’s next annual meeting of stockholders, as long as he continues to serve the company. Upon vesting, each RSU converts into one share of Duolingo Class A Common Stock.

Duolingo director Mario Schlosser received an equity award of 2,001 Class A shares in the form of restricted stock units (RSUs). The RSUs carry no cash exercise price and convert into one share of Class A Common Stock per unit when they vest.

According to the vesting terms, 100% of the RSUs vest on the earlier of the first anniversary of the grant date or the next annual stockholder meeting, as long as Schlosser continues serving the company. After this grant, he directly holds 4,122 Class A shares.

Duolingo, Inc. director Bonnie Ross received an equity grant of 2,001 Class A shares in the form of restricted stock units (RSUs). The award was granted at no cash cost to her and increases her direct holdings to 3,345 Class A shares.

Each RSU converts into one share of Class A Common Stock when it vests. According to the grant terms, 100% of the RSUs vest on the earlier of the first anniversary of the grant date or the next annual meeting of Duolingo’s stockholders, as long as Ross continues serving the company.

Duolingo, Inc. director and CTO/co-founder Severin Hacker reported equity compensation activity involving performance-based restricted stock units (PSUs) tied to the company’s Class B Common Stock. On this Form 4, 60,000 PSUs were exercised into 60,000 shares of Class B Common Stock at a conversion price of $0.00 per share, reflecting the vesting of a portion of his long-term incentive award. To cover tax obligations, 31,920 shares of Class B Common Stock were disposed of in a tax-withholding transaction at $107.82 per share, which is not an open-market sale. Following these transactions, Hacker holds 205,273 shares of Class B Common Stock directly and 72 shares of Class A Common Stock directly, plus 2,836,917 shares of Class B Common Stock indirectly through the SBH Trust dated March 10, 2020, of which he is trustee. Each PSU represents a contingent right to receive one share of Class B Common Stock, subject to both service-based vesting tied to anniversaries of Duolingo’s IPO and performance-based stock price hurdles over a ten-year period, with settled shares generally delivered on the first anniversary of vesting.

Duolingo CEO Luis von Ahn exercised performance-based equity awards and had shares withheld to cover taxes. On this date, he exercised derivative awards for 120,000 performance-based restricted stock units that convert into Class B Common Stock, and a corresponding derivative entry for 120,000 shares was recorded.

To satisfy tax obligations, 54,875 shares of Class B Common Stock were disposed of at a reference price of $107.82 per share through a tax-withholding transaction, not an open-market sale. After these transactions, he directly held 3,422,995 shares of Class B Common Stock.

Duolingo, Inc. General Counsel Stephen C. Chen reported a mix of equity awards and share sales. On May 15, 2026, he received 24,411 Restricted Stock Units (RSUs), each convertible into one share of Class A Common Stock, with 1/16 of the RSUs vesting on each quarterly anniversary of May 15, 2026.

Also on May 15, 2026, 820 shares were sold at $112.16 per share to satisfy tax withholding obligations tied to RSU vesting. On May 18, 2026, he executed additional open-market sales of 1,277 shares at $113.2714 and 700 shares at $114.2216, effected under a pre-arranged Rule 10b5-1 trading plan. Following these transactions, he directly holds 52,807 shares of Duolingo Class A Common Stock.

Duolingo, Inc. Chief Engineering Officer Natalie Glance reported RSU grants and related share sales. She received 39,058 Restricted Stock Units, each convertible into one share of Class A Common Stock, with 1/16th of the RSUs vesting on each quarterly anniversary of May 15, 2026.

To cover tax withholding tied to RSU vesting and share delivery, 5,289 shares of Class A Common Stock were sold in multiple transactions on May 15 and May 18, 2026 at weighted average prices between about $112 and $114 per share, pursuant to a Rule 10b5-1 trading plan adopted on September 15, 2025. After these transactions, Glance holds 173,401 shares directly and 130 shares indirectly through her son.

Duolingo Chief Business Officer Robert Meese reported routine equity compensation activity. He received a grant of 19,529 Restricted Stock Units tied to Class A Common Stock at a reference price of $112.06 per share. The RSUs vest in 16 equal quarterly installments starting on May 15, 2026.

In connection with RSU vesting and share delivery, 1,420 shares were automatically sold at $112.16 per share to satisfy tax withholding obligations, a non-discretionary transaction. Following these activities, Meese holds 172,165 Class A shares directly and 1,800 shares indirectly through two qualified minor’s trusts.

Duolingo, Inc. President & CEO and Co‑Founder Luis von Ahn reported a non-market reshuffling of his holdings. On May 11, 2026, he made a bona fide gift of 50,000 shares of Class A Common Stock and, separately, converted 50,000 shares of Class B Common Stock into Class A. Following these transactions, he directly holds 50,000 Class A shares and 3,302,995 Class B shares, indicating he retains a substantial equity position with no open‑market sales disclosed.

Duolingo, Inc.’s General Counsel Stephen C. Chen exercised stock options to acquire 648 shares of Class A Common Stock on May 12, 2026. The options had an exercise price of $14.42 per share. After this transaction, Chen directly holds 31,193 Class A shares.

The exercised options related to a fully vested grant, and 58 stock options remain outstanding and exercisable under the same award, which is scheduled to expire on March 10, 2030. No open-market purchases or sales were reported in this filing.

Munson Gillian reported acquisition or exercise transactions in this Form 4 filing.

Duolingo, Inc. reported that Chief Financial Officer Gillian Munson received a grant of 133,753 restricted stock units (RSUs) of Class A Common Stock. Each RSU represents the right to receive one share upon vesting. Following this award, she directly holds 137,662 Class A shares.

The RSUs vest over four years, with 25% vesting on February 15, 2027 and the remaining units vesting in equal quarterly installments after that date, subject to her continued service. This is a compensation-related equity award, not an open-market stock purchase or sale.

Duolingo, Inc. Chief Business Officer Robert Meese exercised stock options to acquire 30,000 shares of Class A Common Stock. On March 13, 2026, he exercised options for 4,375 shares at $8.15, 5,625 shares at $14.42, and 20,000 shares at $22.91 per share.

These exercises converted derivative awards into regular shares without any reported open-market sales. Following the transactions, Meese holds 152,636 Class A shares directly, along with additional indirect holdings in qualified minor’s trusts for Eliot and Isaac Meese.

Duolingo director James H. Shelton bought 5,000 shares of Class A Common Stock in an open-market purchase at a weighted average price of $99.7584 per share on March 3, 2026. After this transaction, he directly owns 9,632 Duolingo Class A shares.

Duolingo, Inc. Chief Engineering Officer Natalie Glance reported exercising stock options and acquiring Class A common shares. On February 27, 2026, she exercised options covering 11,834 and 12,418 shares, at exercise prices of $5.00 and $7.11 per share. Following these transactions, she directly held 139,632 Class A shares, with an additional 130 shares held indirectly by her son.

Duolingo Chief Business Officer Robert Meese sold 1,000 shares of Class A Common Stock in an open-market transaction at $110.06 per share. After this sale, he continued to hold a substantial direct stake and also reported indirect holdings through qualified minor's trusts for family members.

Duolingo, Inc. Chief Financial Officer Matthew Skaruppa reported open-market sales of 5,856 shares of Class A common stock. The sales on February 17–18, 2026 were made at weighted average prices around $110.06–$115.55 per share to satisfy tax withholding obligations upon RSU vesting.

These transactions were executed under Skaruppa’s pre-arranged Rule 10b5-1 trading plan adopted on May 27, 2025. After the sales, he directly owned 31,631 Duolingo Class A shares.

Duolingo, Inc. General Counsel Stephen C. Chen reported open-market sales of a total of 2,797 shares of Class A common stock on February 17–18, 2026. Reported sale prices ranged from about $110 to $115 per share.

The filing states these shares were automatically sold to satisfy tax withholding obligations tied to the vesting of Restricted Stock Units and share delivery, and were executed under a pre-arranged Rule 10b5-1 trading plan adopted on May 27, 2025. After the last transaction, Chen directly held 30,545 Class A shares.

Duolingo, Inc. Chief Engineering Officer Natalie Glance reported open-market sales of 5,286 shares of Class A common stock on February 17–18, 2026, at prices around the reported trade prices. Some of the shares were automatically sold to cover tax withholding on vested RSUs. After these transactions, she holds 115,380 shares directly and 130 shares indirectly through her son.

Duolingo, Inc. director and Chief Technology Officer Severin Hacker reported equity award activity involving performance-based restricted stock units and Class B common stock. He exercised 60,000 Performance-Based Restricted Stock Units, receiving 60,000 shares of Class B common stock at a stated price of $0.00 per share.

To cover tax obligations associated with this vesting, 30,594 shares of Class B common stock were disposed of through a tax-withholding transaction at $112.57 per share, rather than an open-market sale. Following these transactions, he held 177,193 shares of Class B common stock directly and 2,836,917 shares indirectly through the SBH Trust dated March 10, 2020, of which he is trustee. His remaining Performance-Based Restricted Stock Units totaled 270,000 after the exercise.

Duolingo President & CEO Luis von Ahn exercised performance-based restricted stock units into 120,000 shares of Class B common stock on February 17, 2026. To cover tax obligations, 53,640 Class B shares were disposed of through a tax-withholding transaction at $112.57 per share. Following these transactions, he directly holds 3,352,995 Class B common shares and 540,000 performance-based restricted stock units that vest upon meeting both service and stock price conditions over time.

Duolingo, Inc. director Mario Schlosser filed an amended insider ownership report related to a transaction dated June 11, 2025. The amendment corrects a prior filing that accidentally left out 1,742 shares that were beneficially owned after the reported transaction. Following this correction, Schlosser is shown as directly owning 2,121 shares of Duolingo Class A common stock. This update is administrative in nature and does not reflect a new transaction, but rather a clarification of the director's previously reported holdings.

Duolingo, Inc. director updates insider share holdings after prior omission. A reporting person who serves as a director of Duolingo, Inc. (DUOL) has filed an amended insider trading report to correct the number of Class A common shares beneficially owned after a previously reported transaction dated June 11, 2025. The amendment explains that a filing made on June 18, 2025 inadvertently left out an additional 965 shares that were beneficially owned following that transaction.

After including the omitted amount, the director now reports beneficial ownership of 1,344 shares of Duolingo Class A common stock, held directly. The filing is made by a single reporting person and is signed by an attorney-in-fact on the director’s behalf.

Duolingo, Inc. (DUOL) CTO and Co-Founder Severin Hacker, who is also a director and 10% owner, reported insider transactions dated 11/19/2025 on a Form 4. He exercised a stock option for 10,000 shares of Class B Common Stock at an exercise price of $38.08 per share, which are convertible into Class A Common Stock.

On the same date, he sold multiple blocks of Class A Common Stock, including 1,146 shares at a weighted average price of $169.5673 and additional sales at weighted average prices up to $176.6814, all under a Rule 10b5-1 trading plan adopted on September 11, 2024. After these transactions, he beneficially owned 72 shares of Class A Common Stock directly and 2,886,917 shares of Class A Common Stock indirectly through SBH Trust dated March 10, 2020.

Duolingo, Inc. (DUOL) reported insider share sales by its General Counsel on a Form 4. On 11/17/2025, the officer sold 1,282 shares of Class A common stock at $177.95, described as an automatic sale to cover tax withholding from vesting Restricted Stock Units. On 11/18/2025, additional sales of 120, 594, 320, and 480 shares were executed at weighted average prices of $173.97, $175.1512, $175.9363, and $177.1858, respectively.

The filing notes that the 11/18/2025 sales were made under a Rule 10b5-1 trading plan adopted on May 27, 2025, meaning they were pre-scheduled. After these transactions, the reporting person beneficially owns 31,542 shares of Duolingo Class A common stock, held directly.

Duolingo, Inc. (DUOL) reported insider share sales by its Chief Financial Officer on a Form 4. On 11/17/2025, the CFO disposed of 2,799 shares of Class A common stock at a price of $177.95 per share, with the filing noting this sale was to cover tax withholding tied to vesting restricted stock units. On 11/18/2025, additional sales totaling several thousand shares occurred in multiple trades at weighted average prices between about $174 and $178 per share under a Rule 10b5-1 trading plan adopted on May 27, 2025. Following these transactions, the CFO beneficially owned 37,487 shares of Duolingo Class A common stock.

Duolingo, Inc. (DUOL) reported insider stock activity by its Chief Engineering Officer. A Form 4 shows that on 11/17/2025, 2,534 shares of Class A common stock were sold at $177.95 to satisfy tax withholding obligations related to vesting of restricted stock units. On 11/18/2025, additional open-market sales were executed under a Rule 10b5-1 trading plan adopted on November 14, 2024, including 160 shares at a weighted average price of $173.7975 and several other small blocks at weighted average prices between $174.9689 and $177.6025, each reflecting multiple trades within disclosed price ranges. After these transactions, the reporting person beneficially owned 111,166 Class A shares directly and 130 shares indirectly through a son.

Duolingo, Inc. (DUOL) officer and Chief Business Officer Robert Meese reported an automatic sale of company stock related to equity compensation. On 11/17/2025, 1,444 shares of Class A common stock were sold at a price of $177.95 per share to satisfy tax withholding obligations tied to the vesting of Restricted Stock Units and share delivery. After this transaction, he beneficially owns 123,636 shares directly, along with additional indirect holdings through two qualified minor's trusts.

Duolingo (DUOL): Insider transaction by CTO/Co‑Founder Severin Hacker. A Form 4 reports that on 11/04/2025 he exercised stock options for 10,000 shares at $38.08, converted Class B into Class A on a one‑for‑one basis, and executed multiple Class A sales under a Rule 10b5‑1 trading plan adopted on September 11, 2024. The sales were reported in weighted‑average price tranches ranging from $257.23 to $267.38. Following the reported transactions, direct Class A holdings were 72 shares. Indirect holdings include 2,886,917 Class A shares held by the SBH Trust dated March 10, 2020.

Duolingo (DUOL) insider activity: Co‑Founder/CTO and director Severin Hacker reported multiple transactions on 10/20/2025. He acquired 10,000 Class A shares at $38.08 via option exercise and then executed open‑market sales of 10,000 shares in multiple trades at prices from $305.86 to $324.10. The sales were made under a Rule 10b5‑1 plan adopted on September 11, 2024.

He also reported the settlement of 60,000 performance‑based RSUs, with 31,770 shares withheld for taxes at $312.73. Following the reported transactions, direct holdings shown in Table I were 72 Class A shares. An additional 2,886,917 Class A shares are held indirectly by the SBH Trust, of which he is trustee.

Duolingo (DUOL) insider activity: On 10/20/2025, President & CEO, Director, 10% owner and Co‑Founder Luis von Ahn reported multiple equity transactions. 120,000 performance‑based RSUs were settled into 120,000 shares of Class B common stock, then 120,000 Class B shares were converted into 120,000 Class A shares. To cover taxes, 51,768 Class A shares were withheld at $312.73 per share.

Following these transactions, the report lists 780,000 performance‑based RSUs beneficially owned and 3,218,403 shares of Class B common stock beneficially owned. Each Class B share is convertible into one Class A share and is subject to automatic conversion under specified conditions.