BTC-WEST-MAIN-SELF-SvsXXI
West Main Self Storage vs Twenty One Capital
Side-by-side Bitcoin treasury comparison: holdings, market cap, mNAV ratio, BTC per share, cost basis, and recent purchases. Numbers refresh every 5 minutes from SEC filings and live market data.
BTC-WEST-MAIN-SELF-S
West Main Self Storage
🇺🇸 US
16 BTC
$997.3K market value
XXI
Twenty One Capital
🇺🇸 US
43,514 BTC
$2.8B market value
Metric
BTC-WEST-MAIN-SELF-S
XXI
BTC holdings
16 BTC
43,514 BTC
Market value of BTC
$997.3K
$2.8B
Average cost per BTC
$83,516.00
$84,865.00
Total cost basis
$1.3M
$3.7B
mNAV (market cap ÷ BTC value)
—
0.64×
Sats per share
—
12.5k
Last disclosed purchase
Sep 1, 2025
- Sep 1, 2025+0 BTC$10.9K
- Aug 25, 2025+0 BTC$11.0K
- Aug 18, 2025+0 BTC$11.6K
- Aug 8, 2025+0 BTC$11.7K
- Aug 4, 2025+0 BTC$11.5K
BTC-WEST-MAIN-SELF-S vs XXI: frequently asked
Which company holds more Bitcoin, BTC-WEST-MAIN-SELF-S or XXI?▾
Twenty One Capital (XXI) holds 43,514 BTC, compared to West Main Self Storage's (BTC-WEST-MAIN-SELF-S) 16 BTC — roughly 2789.4× more.
What's the total Bitcoin value on the balance sheets of BTC-WEST-MAIN-SELF-S and XXI?▾
BTC-WEST-MAIN-SELF-S holds $997.3K worth of Bitcoin at current market prices. XXI holds $2.8B.
Who has a lower cost basis per BTC, BTC-WEST-MAIN-SELF-S or XXI?▾
BTC-WEST-MAIN-SELF-S's average cost is $83,516.00 per BTC. XXI's is $84,865.00. BTC-WEST-MAIN-SELF-S is the lower cost basis.
When did BTC-WEST-MAIN-SELF-S last buy Bitcoin?▾
BTC-WEST-MAIN-SELF-S disclosed a 0 BTC purchase on September 1, 2025.
When did XXI last buy Bitcoin?▾
XXI disclosed a -1 BTC purchase on May 13, 2026.