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Jan  Koum, insider at Facebook

Jan Koum Insider Information

Director of Facebook

Jan Koum is the co-founder and former CEO of WhatsApp, the world’s largest mobile messaging service. WhatsApp was acquired by Facebook in 2014, and Koum left the company in 2018 amidst arguments over the business model and concerns about Facebook’s data privacy policies. 

Koum was born in Kiev, Ukraine in 1976, and he immigrated to California at age 16 with his mother. Koum developed an interest in computer programming around age 18, and he enrolled at San Jose State University.

While still in school, he worked for Ernst & Young as a security tester. It was there that he met his future WhatsApp co-founder, Brian Acton. In 1997, he quit school after being hired by Yahoo as an infrastructure engineer. He stayed with the company for nine years, as did Acton. In 2007, the two left Yahoo and spent a year traveling. 

After purchasing an iPhone in January 2009, Koum quickly realized the potential of the app industry and developed the idea for WhatsApp, incorporating the company just a month later on February 24. Initially, it served as a digital address book that allowed users to display and update a status, such as “At work,” “Battery low,” or “Can’t talk, in a meeting.”

After a quiet first few months, the app started to take off when Apple introduced push notifications, allowing WhatsApp to “ping” its users with status updates.

As people began changing their statuses regularly to communicate with one another, Koum realized he had created an instant messaging platform. At the time, the only other free text messaging service was BlackBerry’s BBM, which only worked between BlackBerries, and the value of connecting people internationally for free was unmatched.

After releasing WhatsApp 2.0 with a messaging component, active users soared to 250,000. Koum brought Acton onto the team, granting him co-founder status after he secured $250,000 in seed funding. By February 2013, the company had 200 million users and had accepted $8 million in venture capital from Sequoia. That year, they took another $50 million in funding and doubled their staff from 50 to 100. 

In 2014, Mark Zuckerberg courted Koum over dinner, proposing that he join Facebook’s board. 10 days later, Facebook’s $19.3 billion acquisition of WhatsApp was announced. The acquisition put Koum on Forbes’ list of the 400 Richest Americans with an estimated $7.5 billion net worth at the time.

In 2016, he sold over $2.4 billion of his Facebook stock, nearly half his total holdings. In 2018, he announced his departure from WhatsApp and Facebook.

What is Jan Koum's net worth?

The estimated net worth of Jan Koum is at least $824.50 million as of November 16th, 2015. Mr. Koum owns 2,576,396 shares of Facebook stock worth more than $824,498,248 as of May 7th. This net worth evaluation does not reflect any other assets that Mr. Koum may own.

How do I contact Jan Koum?

The corporate mailing address for Mr. Koum and other Facebook executives is 1601 WILLOW ROAD, MENLO PARK CA, 94025. Facebook can also be reached via phone at 650-618-7714 and via email at [email protected]

Has Jan Koum been buying or selling shares of Facebook?

Jan Koum has not been actively trading shares of Facebook over the course of the past ninety days. Most recently, Jan Koum sold 1,263,806 shares of the business's stock in a transaction on Wednesday, May 16th. The shares were sold at an average price of $183.45, for a transaction totalling $231,845,210.70.

Who are Facebook's active insiders?

Facebook's insider roster includes Christopher Cox (Insider), David Fischer (CRO), Jan Koum (Director), Jennifer Newstead (VP), Sheryl Sandberg (COO), Michael Schroepfer (CTO), Colin Stretch (VP and General Counsel), David Wehner (CFO), and Mark Zuckerberg (CEO).

Are insiders buying or selling shares of Facebook?

During the last twelve months, insiders at the social networking company sold shares 131 times. They sold a total of 3,425,070 shares worth mmore than $963,368,634.42. The most recent insider tranaction occured on May, 05th when Mark Zuckerberg CEO bought 68,000 shares worth more than $21,599,520.00. Insiders at Facebook own 14.1 % of the company.

Information on this page was last updated on 5/5/2021.

Jan Koum Insider Trading History at Facebook

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
5/16/2018Sell1,263,806$183.45$231,845,210.70View SEC Filing Icon  
5/14/2018Sell10,695$187.01$2,000,071.95View SEC Filing Icon  
2/20/2018Sell1,253,906$176.51$221,326,948.06View SEC Filing Icon  
11/16/2017Sell594,246$179.35$106,578,020.10View SEC Filing Icon  
10/31/2017Sell2,600,000$180.09$468,234,000.00View SEC Filing Icon  
8/31/2017Sell640,754$171.20$109,697,084.80View SEC Filing Icon  
8/30/2017Sell63,629$170.02$10,818,202.58View SEC Filing Icon  
8/16/2017Sell2,953,492$170.17$502,595,733.64View SEC Filing Icon  
7/18/2017Sell3,600,000$160.06$576,216,000.00View SEC Filing Icon  
7/17/2017Sell31,663$160.38$5,078,111.94View SEC Filing Icon  
7/14/2017Sell3,490,137$160.02$558,491,722.74View SEC Filing Icon  
5/16/2017Sell594,246$149.73$88,976,453.58View SEC Filing Icon  
4/28/2017Sell3,200,000$150.27$480,864,000.00View SEC Filing Icon  
3/24/2017Sell243,929$140.29$34,220,799.41View SEC Filing Icon  
3/21/2017Sell432,769$140.91$60,981,479.79View SEC Filing Icon  
3/20/2017Sell88,332$140.01$12,367,363.32View SEC Filing Icon  
3/17/2017Sell2,123,302$140.02$297,304,746.04View SEC Filing Icon  
11/25/2016Sell237,699$120.45$28,630,844.55View SEC Filing Icon  
11/22/2016Sell356,547$119.95$42,767,812.65View SEC Filing Icon  
10/25/2016Sell766,652$132.68$101,719,387.36View SEC Filing Icon  
10/19/2016Sell931,222$129.31$120,416,316.82View SEC Filing Icon  
10/11/2016Sell602,114$129.36$77,889,467.04View SEC Filing Icon  
10/10/2016Sell400,000$130.28$52,112,000.00View SEC Filing Icon  
10/4/2016Sell566,668$128.22$72,658,170.96View SEC Filing Icon  
9/27/2016Sell566,668$128.36$72,737,504.48View SEC Filing Icon  
9/22/2016Sell966,668$129.26$124,951,505.68View SEC Filing Icon  
9/13/2016Sell566,668$127.19$72,074,502.92View SEC Filing Icon  
9/8/2016Sell1,566,668$129.70$203,196,839.60View SEC Filing Icon  
8/30/2016Sell566,668$125.70$71,230,167.60View SEC Filing Icon  
8/24/2016Sell804,367$124.51$100,151,735.17View SEC Filing Icon  
8/22/2016Sell356,547$123.95$44,194,000.65View SEC Filing Icon  
8/16/2016Sell1,215,096$123.80$150,428,884.80View SEC Filing Icon  
8/15/2016Sell648,428$124.08$80,456,946.24View SEC Filing Icon  
8/9/2016Sell566,668$125.46$71,094,167.28View SEC Filing Icon  
7/12/2016Sell1,721,436$118.13$203,353,234.68View SEC Filing Icon  
7/11/2016Sell1,434,530$118.16$169,504,064.80View SEC Filing Icon  
7/6/2016Sell183,261$115.75$21,212,460.75View SEC Filing Icon  
7/1/2016Sell103,645$115.01$11,920,211.45View SEC Filing Icon  
6/27/2016Sell1,434,530$109.64$157,281,869.20View SEC Filing Icon  
6/23/2016Sell19,534$115.01$2,246,605.34View SEC Filing Icon  
6/15/2016Sell267,372$115.09$30,771,843.48View SEC Filing Icon  
6/13/2016Sell1,434,530$114.36$164,052,850.80View SEC Filing Icon  
6/1/2016Sell1,721,436$118.80$204,506,596.80View SEC Filing Icon  
5/25/2016Sell237,699$117.57$27,946,271.43View SEC Filing Icon  
5/23/2016Sell356,547$116.82$41,651,820.54View SEC Filing Icon  
5/17/2016Sell286,906$118.01$33,857,777.06View SEC Filing Icon  
5/16/2016Sell2,082,957$118.27$246,351,324.39View SEC Filing Icon  
5/3/2016Sell286,906$117.71$33,771,705.26View SEC Filing Icon  
5/2/2016Sell2,008,342$118.07$237,124,939.94View SEC Filing Icon  
4/18/2016Sell1,434,530$110.07$157,898,717.10View SEC Filing Icon  
4/4/2016Sell1,434,530$112.78$161,786,293.40View SEC Filing Icon  
3/29/2016Sell1,147,624$115.34$132,366,952.16View SEC Filing Icon  
3/21/2016Sell1,434,530$111.63$160,136,583.90View SEC Filing Icon  
3/7/2016Sell1,434,530$106.25$152,418,812.50View SEC Filing Icon  
2/25/2016Sell357,370$105.90$37,845,483.00View SEC Filing Icon  
2/22/2016Sell1,672,776$106.78$178,619,021.28View SEC Filing Icon  
2/17/2016Sell933,963$102.80$96,011,396.40View SEC Filing Icon  
2/16/2016Sell647,057$101.80$65,870,402.60View SEC Filing Icon  
2/8/2016Sell1,147,624$99.55$114,245,969.20View SEC Filing Icon  
11/25/2015Sell1,030,559$105.69$108,919,780.71View SEC Filing Icon  
11/23/2015Sell1,545,837$106.97$165,358,183.89View SEC Filing Icon  
See Full Table

Jan Koum Buying and Selling Activity at Facebook

Facebook Company Overview

Facebook logo
Facebook, Inc. develops products that enable people to connect and share with friends and family through mobile devices, personal computers, virtual reality headsets, and in-home devices worldwide. The company's products include Facebook that enables people to connect, share, discover, and communicate with each other on mobile devices and personal computers; Instagram, a community for sharing photos, videos, and private messages; Messenger, a messaging application for people to connect with friends, family, groups, and businesses across platforms and devices; and WhatsApp, a messaging application that is used by people and businesses to communicate in a private way. It also provides Facebook Reality Labs, an augmented and virtual reality product that help people feel connected, anytime, and anywhere. Facebook, Inc. was founded in 2004 and is headquartered in Menlo Park, California.
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Overview Details

Today's Range

Now: $320.02

50 Day Range

MA: $302.10

2 Week Range

Now: $320.02


18,885,313 shs

Average Volume

20,540,926 shs

Market Capitalization

$911.31 billion

P/E Ratio


Dividend Yield



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