Here is a list so far over major cryptocurrency theft or went lost (as in the case of QuadrigaCx) till to-date
2014
March 2014: Mt. Gox - $450 M. Mt. Gox was a Tokyo based Bitcoin Exchange. About 850,000 Bitcoins were stolen from the Japanese Exchange.
2015
January 2015: Bitstamp - $5.1 M. About 19,000 Bitcoins were stolen. Bitstamp is based in Slovenia.
2016
June 2016: DAO Hack - $50 M. DAO - decentralized autonomous organization. A stateless digital organisation that is not based in any particular country.
August 2016: Bitfinex - $73 M. Bitfinex is a Hong Kong based cryptocurrency Exchange.
2017
July 2017: CoinDash - $7 M. CoinDash is an Israeli cryptocurrency trading startup.
July 2017: Parity - $32 M. About 153000 Ethereum were theft. Parity has offices in the UK and Germany.
November 2017: Tether - $30.9 M. Tether is a Hong Kong-based cryptocurrency startup.
December 2017: NiceHash: $70 M. NiceHash is a Slovenian Bitcoin mining platform.
2018
January 2018: Coincheck - $530 M. Coincheck is a Tokyo-based cryptocurrency exchange.
February 2018: BitGrail - $195 M. BitGrail is an Italian cryptocurrency exchange. Hackers took away about $195 million worth of Nano coins from the exchange.
June 2018: Bithumb - $31 M. Bithumb is a South Korea-based crxpto Exchange.
July 2018: Binance - $45 M. Originally founded in China but now the headquarter is in Japan.
September 2018: Zaif - $60 M. Zaif is a Japan-based cryptocurrency Exchange.
October 2018: MapleChange - $6 M. MapleChange is a Canadian Bitcoin Exchange.
2019
January 2019 : Cryptopia - $16 M. Cryptopia is a New Zealand based crypto Exchange.
February 2019: QuadrigaCx - $190 M. QuadrigaCx was a Canada based cryptocurrency Exchange. Founder Gerald Cotten died suddenly in India from Crohn's disease. Some more info here
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