Which wallets added BTC this week?

TLDR

Notable entities that added Bitcoin (BTC) this week include MicroStrategy and Tether, and spot Bitcoin ETFs saw net inflows.

1. MicroStrategy bought 1,229 BTC last week per an investing update.
2. Tether added 8,888 BTC on 31 Dec per a market note.
3. U.S. spot Bitcoin ETFs recorded about $355 million net inflows after a week of outflows per an ETF flow summary.

Deep Dive

1. MicroStrategy

MicroStrategy (MSTR) disclosed purchasing 1,229 BTC last week, funded via its ATM program.

1. The firm reported the addition of 1,229 BTC and raised $108.8M in proceeds in the update above (investing update).
2. Corporate treasury buyers like MSTR tend to accumulate in tranches and disclose post?purchase, not via on?chain labels.

2. Tether Reserves

Tether reported adding 8,888 BTC on 31 Dec as part of its policy to allocate up to 15% of profits into BTC.

1. The addition pushed reported holdings above 96,000 BTC per the note above (market note).
2. The same update cites related reserve mix changes and third?party scrutiny, highlighting both accumulation and risk considerations.

3. Spot Bitcoin ETF Flows

U.S. spot Bitcoin ETFs saw about $355M net inflows after a seven?day outflow streak.

1. The flows indicate funds collectively added BTC exposure this week (ETF flow summary).
2. Flow direction often swings with macro tone and liquidity, so treat weekly prints as indicators rather than guarantees.

Conclusion

This weeks BTC additions were driven by corporate treasury buying (MicroStrategy), reserve allocation (Tether), and renewed ETF inflows. Together they point to ongoing institutional and quasi?institutional demand, but flows can reverse quickly. If youre tracking which wallets, prioritize official disclosures and flow reports over unlabeled on?chain addresses for reliable confirmation.