Star Beacon LLC

Star Beacon LLC is identified in the Cipher Mining Form 8-K filed January 30, 2025 as a Delaware limited liability company and a wholly-owned subsidiary of SoftBank Group Corp ¹. The Subscription Agreement constituting Exhibit 10.1 to that filing names Star Beacon as the purchaser and Cipher Mining Inc as the issuer, with SoftBank Group Corp identified as the parent backing the entity ¹. The vehicle has no separate operational footprint, no employees disclosed in public records, and no business activity outside the Cipher subscription and subsequent disposition.

The use of a single-purpose Delaware LLC for a strategic equity position is consistent with SoftBank's general practice of compartmentalising portfolio positions into named subsidiaries; it is not, on its own, an investigative anomaly. The structural significance is that the position-holder, the principal at SoftBank Group Corp, and the publicly-traded counterparty Cipher Mining are linked through a single document chain — the Form 8-K and its EX-10.1 — without intermediate fund or sleeve structure that would diffuse the trade timing across multiple LP commitments ¹. The exact 10,438,413-share subscription count later appears, unchanged, as the exact removal in the Q3 2025 13F, demonstrating that the position was held intact and exited as a unit ³.

The Subscription Agreement priced the $50 million purchase at approximately $4.79 per share for 10,438,413 CIFR shares and granted Star Beacon an option to participate in development of a 300-megawatt undeveloped data-centre site in Texas — the asset whose AI-infrastructure adjacency was the public rationale for the deal ¹. Bitfury Group Limited retained majority control of Cipher Mining through its Bitfury Top HoldCo B.V. subsidiary at approximately 23.05% of outstanding shares as of the PIPE date ¹.

According to the chronology drawn from the filings, the subscription closed within a tight window around the Stargate announcement ⁴. The Stargate joint venture between SoftBank, OpenAI, Oracle, and MGX Fund Management Limited was announced from the White House on January 21, 2025, with reported equity split of approximately 40% SoftBank, 40% OpenAI, and 10% each for Oracle and MGX, totalling roughly $7 billion in initial commitments ². The Star Beacon-Cipher subscription closed nine days later, on January 30, 2025 ¹.

Bitfury Group Limited filed a $53.9 million share-premium cancellation and dividend resolution on December 23, 2024 — 38 days before the Cipher PIPE — extracting sponsor-side cash on the eve of the announcement-driven appreciation ⁵. Brian P. Brooks, who joined the Bitfury board on December 20, 2021 and authored the OCC interpretive-letter framework underpinning bank crypto-custody, was appointed to the MicroStrategy board on December 20, 2024 — 34 days before the Cipher PIPE.

Per 13F institutional holdings tracking via Fintel and MarketBeat for Q3 2025, SoftBank Group Corp removed 10,438,413 shares of CIFR — a 100% reduction matching the exact share count of the Star Beacon subscription ³. The exit occurred within approximately nine months of entry. Vanguard Group added 9,865,533 shares (+43.2%) in Q4 2025, almost exactly absorbing the SoftBank disposition ³. Cipher Mining had 417 reporting institutional owners holding 328,763,732 shares as of Q4 2025 ³.

Over the same July-September window, V3 Holding Ltd, the Vavilov-controlled Bitfury Group Limited parent, trimmed its CIFR position from 25.7% (95.4 million shares) in July 2025 to 20.2% (79.4 million shares) on September 15, 2025 ³. The concurrence of the two reductions points to both anchor sponsors of the Cipher spin-off selling into the announcement-driven AI-infrastructure rally rather than rebalancing independently ³. On that reading, analysis suggests the holding period is difficult to reconcile with a long-horizon strategic alliance ³⁴.

Examination of the transaction timing places the Star Beacon PIPE as one component of a broader pattern centred on the January 21, 2025 Stargate event ⁴. Review of the filings — SEC, Companies House, and 13F holdings — indicates that much of the activity associated with the Stargate announcement was already in motion beforehand: Crusoe began construction at the Abilene, Texas data centre in June 2024, seven months before the announcement; the AltC SPAC closed in May 2024 with an anomalous $7,457.80 redemption against approximately 30 million shares, with the PIPE backstop not triggered; Bitfury paid the $53.9 million dividend on December 23, 2024; SoftBank's Star Beacon entry followed on January 30, 2025; and SoftBank's full exit completed by Q3 2025 ⁴⁵.

This pattern, in which a high-profile announcement consolidates pre-existing investments and capital commitments into a single narrative and the announcement itself becomes the price-moving event, is sometimes described as announcement-bundling. Analysis of the holdings suggests that Star Beacon's nine-month round-trip — pricing in shortly after the announcement and exiting after the resulting price appreciation — fits an insider-repositioning sequence, with the Bitfury dividend representing the corresponding sponsor-side cash extraction upstream ⁴³⁵.

According to the wider network mapping, the same transaction connects to the parallel-financial-system, bridge-tax, and private-order themes that recur around Bitfury Group Limited and Sheikh Tahnoon bin Zayed Al Nahyan's deal-flow network ⁴. MGX Fund Management Limited participated in the Stargate JV at the same equity layer as SoftBank Group ². Records show the board overlaps placing the Star Beacon-Cipher transaction at the intersection of the SoftBank Vision Fund 2 perimeter and the Tahnoon-anchored UAE sovereign deal-flow that runs through MGX, Aryam Investment 1, and OneIM private-credit intermediation ⁴.

Star Beacon LLC's significance to the investigation is structural rather than operational. The vehicle is small, single-purpose, and now apparently dormant; the 10,438,413-share PIPE is not, by absolute size, a market-moving position. Examination of the record points to three observations ⁴.

First, the entry-and-exit chronology — Star Beacon entered nine days after the Stargate announcement and exited within nine months — indicates that SoftBank's position in the publicly-listed leg of the Bitfury complex was held roughly for the period over which the announcement-driven price appreciation played out ³. Records show the period is difficult to square with the public interpretation of the PIPE as long-horizon AI-infrastructure positioning aligned with Stargate's stated mission ³⁴.

Second, the symmetric reduction by V3 Holding Ltd in the same Q3 2025 window indicates that both sponsors of the Bitfury-Cipher spin-off — the upstream Latvian-Russian-Ukrainian-British-citizen Vavilov-controlled UK parent and the Japanese sovereign-adjacent SoftBank Group Corp — distributed shares into the same buyer base in the same quarter ³. The CIFR 13F flows are more consistent with coordinated insider distribution than with independent portfolio decisions ³.

Third, the 38-day spacing between the Bitfury share-premium cancellation dividend (December 23, 2024) and the Star Beacon-Cipher PIPE (January 30, 2025), together with the 34-day spacing between Brooks's MicroStrategy board appointment (December 20, 2024) and the same PIPE, places three discrete pre-positioning events in the eight-week window before the Star Beacon entry ⁵. Review of the records frames the cluster as a clear example of the announcement-bundling pattern within the broader Tahnoon-Mubadala-anchored deal-flow ⁶⁴.