One of the addresses involved in the exploit appears to have contributed to the Holograph protocol, though it's not clear if they took advantage of insider knowledge to pull off the heist.
Holograph exploited for more than $1.2 million
The Holograph tokenization project was exploited on June 13 after they took advantage of a flaw in a smart contract that allowed them to mint 1 billion HLG tokens. Notionally worth $14.4 million at the time the tokens were minted, relatively low liquidity meant that the introduction of a billion additional tokens crashed the token price by 80%. The attacker ultimately was able to cash out around 348 ETH (~$1.2 million).
- "HLG Down Over 60% as Exploiter Mints 1 Billion New Tokens", CoinDesk [archive]
- "Holograph fell 80% in 9 hours after exploiter mints 1B additional HLG", Cointelegraph [archive]
- Etherscan data for one of the attacker's wallets [archive]