Its U.S.-listed stock holdings in the quarter ended Sept. 30 increased from nearly $16 billion in the prior quarter, according to a U.S. Securities and Exchange Commission filing.
The PIF also owns a 62.72% stake in electric car company Lucid, which has a market value of about $71 billion, a significant boost in value from the end of September.
"The Q3 figure is indeed significantly larger than Q2, but most of the increase is due to Lucid Motors' IPO in July," said Diego Lopez, managing director at Global SWF, an industry data specialist.
"If you isolate the effect of Lucid, the U.S. equity holdings increased only 11%, from $15.9 billion to $17.7 billon."
Lucid’s listing in July was a huge dividend for the Saudi sovereign wealth fund, which invested more than $1 billion in the company in 2018 for a substantial stake and invested more in February. The PIF also owns a 3.75% stake in ride-sharing company Uber Technologies.
The PIF has boosted its firepower from several funding sources in recent years, including loans and a $40 billion transfer from central bank reserves last year.