Fidelity Investments was the second-largest reported institutional holder, with 302.6 million SpaceX shares, followed by Gigafund Management with 171.8 million, Baillie Gifford with 51.4 million and BlackRock with 51.0 million.
Alphabet, Fidelity, Gigafund Management, Baillie Gifford and BlackRock, the five largest reported holders in the data, accounted for nearly three quarters of reported SpaceX shares, highlighting the concentration of reported institutional ownership among a handful of investors.
Separately, SpaceX said in a regulatory filing that Musk owned a stake in the company.
48.4%
SpaceX went public on June 12 at $135 a share. Its shares have since retreated from their end-June level. SpaceX closed at $141.29 on Thursday, 4.7% above its IPO price but 17.3% below the June 30 close.
Sosnick told Reuters that SpaceX remains one of the most actively traded stocks among customers at Interactive Brokers, receiving a "fresh jolt of buying last week when market fears about what would happen when the first lockup expiry arrived proved to be unfounded."
Retail owners of SpaceX shares, who do not have to submit their holdings to the SEC, turned into net sellers of the stock on Friday for the first time since the IPO, according to data from Vanda Research. The research firm, which tracks the activity of self-directed individual investors, calculated that this group sold a net $4.5 million on that day. SpaceX shares were down 3% on Thursday but have risen 30% since August 5.
Alphabet's SpaceX stake rises to $94 billion
Alphabet held SpaceX shares worth $94 billion on June 30, according to filings, up from the $900 million investment it said it made in Elon Musk's rocket company in 2015.
SpaceX shares have since declined, valuing Alphabet's stake at about $82 billion.
Alphabet is the largest reported institutional holder
Alphabet has emerged as by far the largest single institutional holder of SpaceX following its $86 billion IPO in June, according to a Reuters analysis of quarterly filings made public so far.
The filings shed new light on the scale of positions acquired by SpaceX's backers as the company transitioned from a closely held startup to a publicly traded giant. Together with separate public disclosures on early investments, including Alphabet's, they also highlight how dramatically the value of some early investments in SpaceX has grown.
Alphabet held 551.2 million SpaceX shares at the end of the second quarter, worth about $94.2 billion at SpaceX's June 30 share price of $170.86. At Thursday's price, Alphabet's disclosed position would be worth about $77.9 billion, still about 86.5 times the size of Google's original investment.
