14.4k S21 Pros to fill MB-5 in Q1 2025
Company: TeraWulf - Project: Lake Mariner Anthropic AI Factory
What the later record shows
Delivered on time · happened March 31, 2025
S21 Pro holdings rose from 12,900 at December 31, 2024 to 26,800 at March 31, 2025, an increase of about 13,900 units in Q1 2025. That is roughly the planned 14.4k.
“Bitmain S19k Pro 4,200 Bitmain S21 8,300 Bitmain S21 Pro 12,900 62,000”
2025-03-02 · TeraWulf 10-K filed 2025-03-03 View cached copy (2026-08-31)Live source ↗
“Bitmain S19k Pro 4,000 Bitmain S21 8,100 Bitmain S21 Pro 26,800 73,200”
2025-05-08 · TeraWulf 10-Q filed 2025-05-09 View cached copy (2026-08-31)Live source ↗
Checked October 13, 2026 against filings, releases and reporting published after the claim was made. Quotes are verbatim from the linked documents.
The claim, verbatim
In Q1 2025 TeraWulf plans to receive an additional 14,400 S21 Pro miners to fully utilize MB-5 at Lake Mariner.
Source (primary)
Nautilus Sale Announcement (IR page (investors.terawulf.com), ir_presentation)
View cached copy (2026-10-13)Live source ↗Archive.org ↗
Quote: “In Q1 2025, WULF plans to receive an additional 14.4k S21 Pros to fully utilize MB-5 at Lake Mariner”
How we checked this
Checked on October 15, 2026. The cited source supports every part of this claim.
The deck states that in Q1 2025 WULF plans to receive an additional 14.4k S21 Pros to fully utilize MB-5 at Lake Mariner.
Confirmed in the source:
- TeraWulf plans to receive an additional 14,400 S21 Pro miners
- The miners are planned for Q1 2025
- The purpose is to fully utilize MB-5 at Lake Mariner
What we did: Read our cached copy of IR page (investors.terawulf.com) (https://d1io3yog0oux5.cloudfront.net/_513c80c486e62e4bdb70115ded3782f5/terawulf/db/2396/23300/pdf/WULF_Nautilus_Sale_Announcement_Deck_%2810-03-24%29vF.pdf) in full (14,394 characters, retrieved October 13, 2026) and checked each assertion in the claim against it.
Additional evidence
confirms Nautilus Sale Announcement
Quote: “In Q1 2025, WULF plans to receive an additional 14.4k S21 Pros to fully utilize MB-5 at Lake Mariner”
confirms TeraWulf 10-K filed 2025-03-03
Quote: “Bitmain S19k Pro 4,200 Bitmain S21 8,300 Bitmain S21 Pro 12,900 62,000”
confirms TeraWulf 10-Q filed 2025-05-09
Quote: “Bitmain S19k Pro 4,000 Bitmain S21 8,100 Bitmain S21 Pro 26,800 73,200”