Market-cap ratio vs. exchange ratio
In October 2026 a Barclays note put a hypothetical all-stock combination at about 0.7 “at current market caps.” That number compares the size of the two companies — Tesla's value divided by SpaceX's. It is not the number of SPCX shares a TSLA holder would get.
What lands in your brokerage account is set by the exchange ratio: SPCX shares per TSLA share. The two are linked by share counts:
exchange ratio = market-cap ratio × (SpaceX shares ÷ Tesla shares)
Because SpaceX has several times more shares outstanding than Tesla, a 0.7 market-cap ratio corresponds to an exchange ratio well above 1. The simpler check uses prices: matching value today takes TSLA price ÷ SPCX price SPCX shares per TSLA share — about 2.3–2.5 at mid-October 2026 prices.
Three ways to set terms in the calculator
- Premium % — the usual way deals are described. 0% is value parity; +20% means TSLA holders get 20% more value than today's price.
- Exchange ratio — type the ratio directly if a figure is ever proposed.
- Market-cap ratio — converts a headline number like 0.7 into shares, using the share counts below. Disabled until both counts are verified from filings.
Share counts we use
| Company | Shares outstanding | Source |
|---|---|---|
| Tesla | 3.950B | Tesla 10-Q for Q2 2026 (filed Jul 23, 2026), cover page: https://www.sec.gov/Archives/edgar/data/1318605/000162828026049270/tsla-20260630.htm |
| SpaceX | 13.182B | SpaceX 10-Q for Q2 2026 (filed Aug 4, 2026), cover page: https://www.sec.gov/Archives/edgar/data/1181412/000162828026052535/spcx-20260630.htm |
What about taxes?
Many stock-for-stock deals qualify as tax-free reorganizations: your basis carries over and nothing is owed until you sell the new shares. The calculator's “after tax if sold” figure assumes a later sale at 23.8% on the gain over your combined original cost. If a deal included cash, that portion could be taxable at closing.
Common questions
Has Tesla announced a merger with SpaceX?
No. As of October 2026 there is no announced deal, filing, or agreed exchange ratio. Elon Musk has declined to rule one out and some analysts (e.g. Barclays) have speculated about timing. Every merger number on Exit Velocity is a hypothetical you control.
Barclays said ~0.7. Does that mean I'd get 0.7 SPCX shares per TSLA share?
No. The ~0.7 figure compares company values: Tesla's market capitalization divided by SpaceX's. What a shareholder receives is an exchange ratio — SPCX shares per TSLA share — which depends on share prices and share counts. At mid-October 2026 prices, simply matching value works out to roughly 2.3–2.5 SPCX per TSLA. Receiving 0.7 shares would be a large haircut, not a deal term anyone has proposed.
How is the exchange ratio calculated?
At value parity, ratio = TSLA price ÷ SPCX price. With a premium p, ratio = TSLA price × (1 + p) ÷ SPCX price. From a market-cap ratio M, ratio = M × (SpaceX shares outstanding ÷ Tesla shares outstanding). Exit Velocity lets you enter any of the three.
Would a stock-for-stock merger be taxable?
Many all-stock acquisitions are structured as tax-free reorganizations, in which case your cost basis carries over to the new shares and tax is due only when you sell. Deal structure decides this, so treat any after-tax number as an estimate and confirm with a tax professional.