Bitcoin miner IREN registered nearly 12 million shares issued in its acquisition of Mirantis for potential resale, creating a block worth about $476 million that could add selling pressure to its stock.
The company agreed in May to acquire Mirantis in a transaction valued at approximately $625 million at signing, largely through a fixed number of 13.7 million IREN shares.
However, the deal closed Aug. 3 with IREN issuing 12.6 million shares alongside about $40 million in cash, restricted stock units and other consideration.
One day later, IREN filed a prospectus covering 11.9 million of those shares held by former Mirantis investors, directors, officers and employees. The block was worth about $476.3 million at IREN’s Aug. 3 closing price of $39.75. 
The registration allows these new holders to sell all or part of their stock through public or private transactions. IREN will receive no proceeds because the shares already belong to the former Mirantis holders.
The filing does not indicate that any holder has sold or intends to sell. However, it removes a restriction on nearly 95% of the shares issued at closing, creating a potential overhang if a meaningful portion reaches the market.
IREN shares were down about 3% to $39.76 as of the end of the market closing on Wednesday. The filing does not establish that the potential resale block caused the decline.
Mirantis completes IREN’s three-layer AI stack
IREN accepted the additional shares because Mirantis fills what the company describes as the third layer of its vertically integrated AI platform.
The first layer consists of land, power connections and data centers. The second covers GPUs, servers and networking equipment. Mirantis adds software used to deploy, orchestrate, monitor and support AI workloads running on that infrastructure.
IREN said the combination would allow it to serve a wider range of customers. Hyperscalers can rent bare-metal computing capacity, while enterprises and AI developers can purchase more fully managed cloud services.
Mirantis has served more than 1,500 enterprise customers, and its software has already supported announced and prospective IREN cloud contracts. Its platform manages infrastructure across bare-metal systems, virtual machines and Kubernetes environments.
The acquisition shows the cost of IREN’s effort to expand beyond providing power, data-center space and GPUs. The company transferred hundreds of millions of dollars in equity to add the software and operational capabilities needed to compete as a broader AI cloud provider.
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