The recipient wallet of the $1 billion Bitcoin (BTC) transaction on Sept. 6 is now presumed to be the first richest non-exchange address.

The recipient wallet of the massive 94,504 Bitcoin ($1.031 billion) transaction is the top richest Bitcoin address that is not reportedly associated with any crypto-related company, according to data from monitoring resource Bitinfocharts.

Top 5 richest Bitcoin addresses. Source: Bitinfocharts

A third of the coins came from Huobi

According to data by London-based blockchain data provider TokenAnalyst, at least one third of the mysterious transaction directly originates from Huobi exchange. Another analyst, blockchain data and metrics firm Glassnode tweeted that at least 73,000 BTC from the transaction originate from Huobi.

According to an earlier tweet by Crypto Herpes Cat, at least two Bitcoin wallets involved in the notable transaction belong to Huobi. One of the specified wallets is directly involved in the transaction.

Cointelegraph has reached out to Huobi for comments, to which the exchange's representative responded:

“As we don't generally disclose information about transactions, we can only confirm that this transfer of funds did not involve Huobi’s own funds and that, with exchanges as big as ours, large transactions like this one can and do occur from time to time. Our security team has been monitoring the situation carefully and has found no evidence of any compromises in account security. All client funds remain safe and secure.”

Rumors run wild

As reported earlier today, crypto monitoring resource Whale Alert stated that the much-discussed transaction did not involve any known wallets or those belonging to any specific crypto exchange or any crypto-related firm.

Some analysts suggested that funds may be tied to institutional trading platform Bakkt, which starts accepting client deposits today.

Meanwhile, Huobi, which is ranked 20th biggest crypto exchange by adjusted daily trading volume at press time, was reported to have seen the highest number of withdrawals from the alleged crypto Ponzi scheme PlusToken by Aug. 23.

Huobi did not respond to Cointelegraph’s inquiry about the transfer by press time.