#SaylorBTCPurchase number of major companies have added Bitcoin to their reserves as part of their investment strategies. Some of the most prominent companies include:

1. **MicroStrategy**: Invested heavily in Bitcoin and announced that it holds large amounts of it.

2. **Tesla**: Purchased Bitcoin as an investment and announced acceptance of it as a payment method for a period of time.

3. **Square (now Block)**: Invested in Bitcoin and launched related trading services.

4. **Galaxy Digital**: An investment company focusing on digital currencies with investments in Bitcoin.

5. **Coinbase**: A cryptocurrency trading platform that holds Bitcoin as part of its balance sheet.

More companies continue to explore adding Bitcoin to their reserves.