Hacker Severin

Chief Tech Officer, Co-Founder

Hacker Severin has filed 14 SEC Form 4 filings (172 transaction rows) across 1 company, with disclosures dating back to 2025. 3 of those filings fall inside the rolling window. Most recent filing: Dec 9, 2025.

On the most recent filing, Hacker Severin is listed as Chief Tech Officer, Co-Founder at Duolingo, Inc. Inside the rolling window, Hacker Severin reported no open-market purchases and 2 open-market sales totaling $4.4M in DUOL. The largest disclosed transaction in the window is a sale of 10,000 DUOL shares on Nov 4, 2025, worth $2.6M.

Companies traded

Other insiders at DUOL

Insider Buying

$0

reported purchases (SEC code P)

Insider Selling

$4.4M

reported sales (SEC code S)

Companies

1

in the rolling window

Source
DUOL
Hacker Severin
Sale$1.7MNov 20SEC ↗
DUOL
Hacker Severin
Sale$2.6MNov 6SEC ↗
Showing 1–2 of 2
1 / 1

Earlier trades

Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.

DateTickerTypeValue
Oct 20, 2025DUOLSale$32K
Oct 20, 2025DUOLSale$97K
Oct 20, 2025DUOLSale$129K
Oct 20, 2025DUOLSale$96K
Oct 20, 2025DUOLSale$289K
Oct 20, 2025DUOLSale$216K
Oct 20, 2025DUOLSale$507K
Oct 20, 2025DUOLSale$347K
Oct 20, 2025DUOLSale$157K
Oct 20, 2025DUOLSale$400K
Oct 20, 2025DUOLSale$311K
Oct 20, 2025DUOLSale$196K
Oct 20, 2025DUOLSale$155K
Oct 20, 2025DUOLSale$185K
Oct 20, 2025DUOLSale$31K
Oct 6, 2025DUOLSale$66K
Oct 6, 2025DUOLSale$426K
Oct 6, 2025DUOLSale$196K
Oct 6, 2025DUOLSale$163K
Oct 6, 2025DUOLSale$97K
Oct 6, 2025DUOLSale$35K
Oct 6, 2025DUOLSale$377K
Oct 6, 2025DUOLSale$578K
Oct 6, 2025DUOLSale$511K
Oct 6, 2025DUOLSale$610K
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Frequently asked questions

How many SEC Form 4 filings has Hacker Severin made?

Hacker Severin has filed 14 SEC Form 4 filings (172 transaction rows) across 1 company since 2025.

Which companies does Hacker Severin trade?

Hacker Severin has filed SEC Form 4 disclosures for 1 company, including DUOL.

When was Hacker Severin's most recent SEC Form 4 filing?

Hacker Severin's most recent SEC Form 4 filing on Tracefour is dated Dec 9, 2025.

What is Hacker Severin's job title?

On the most recent SEC Form 4 filings tracked by Tracefour, Hacker Severin is listed as Chief Tech Officer, Co-Founder.

What is Hacker Severin's total buy and sell value in the current window?

Inside the rolling retention window, Hacker Severin bought $0 and sold $4.4M based on SEC Form 4 filings.

What was Hacker Severin's largest disclosed transaction?

The largest disclosed transaction in the current window is a sale of 10,000 DUOL shares on 2025-11-04, worth $2.6M, per SEC Form 4 filings.