Binance Rebases SpaceX Pre-IPO Perpetuals After Share Count Surge

• Binance made its rebase policy public at the outset, making it very obvious that share count variances that are more than three percent would result in automatic rebases.
• SpaceX files their S-1A on June 3, and the company’s shares rise to 13.08 billion.

A pre-IPO perpetual rebase on SpaceX (SPCX) was published by Binance yesterday. The contract size was adjusted by 1.1x. This was done in response to SpaceX’s S-1A filing on June 3rd, which indicated that the company’s share had increased to around 13.08 billion. It is proposed that the contract size of futures traders on Binance will be rebased by 1.1x, which would shield them against diluting losses.

What Happened

• Binance released SPCX perpetuals on May 21. The projected number of shares count is 11.87 billion.
• Binance announced its rebase policy on May 29. The policy states that rebase is used when the share divergence is more than 3%.
• SpaceX files their S-1A on June 3, and the company’s shares rise to 13.08 billion.
• Binance has announced a 1.1x rebase on June 8th, meaning that the projected number of shares has increased from 11.87 billion to 13.08 billion. Beginning from 2026-06-10 08:30 UTC, the contract size of traders will be modified by +10%. (The value of the notional asset does not change.)

What does this mean for Pre-IPO Perps

The rebase function of Binance imitates actual company events (such as stock splits, share issuances, and dividends), so shielding traders from the risk of dilution exposure.

In the realm of derivatives, Binance continues to be the industry leader:

The Pre-IPO perpetuals offered by Binance were a reflection of real company operations and made predictions about changes in share capital before they actually emerged. Following the publication of the exchange’s rebase policy on May 29, it was stated that any divergence from the anticipated share count that was higher than three percent would result in an immediate adjustment.

In the days that followed SpaceX’s S-1A on June 3, Binance carried out the 1.1x rebase, so shielding traders from diluting losses that platforms that do not have this feature do not avoid.

In order to function, Binance utilizes transparent mechanisms:

Binance made its rebase policy public at the outset, making it very obvious that share count variances that are more than three percent would result in automatic rebases.

Because of this transparency, traders were able to comprehend the terms of the contract before initiating transactions, so avoiding the possibility of encountering unforeseen alterations after the fact. The removal of impediments to accessibility releases previously dormant market demand.

At the end of June 8, SpaceX’s pre-IPO perpetual volume had topped one billion dollars. There has been a convergence on Binance in terms of pre-IPO derivatives volume, depth, and price discovery. Within just six days of its debut, Binance grabbed a market share of sixty-five percent.

This illustrates that traders create large volume when they access possibilities that were previously inaccessible to them, such as exposure to private businesses prior to their public listing.