Seven Major Bitcoin Mining Pools Join Stratum V2 Working Group

Seven major Bitcoin mining pools have joined the Stratum V2 Working Group, marking a significant coordination milestone for the protocol that aims to upgrade how miners and pools communicate across the Bitcoin network.

Antpool, Block Inc., F2Pool, Foundry, MARA Foundation, SpiderPool, and DMND all joined the working group, as confirmed by the official Stratum V2 website, which lists them alongside existing members Auradine, Braiins, and Spiral.

The expansion was reported on May 7, 2026, with Blockspace reporting that the seven participants joined to independently test Stratum V2 and work on cross-implementation interoperability.

Seven Major Bitcoin Mining Pools Back the Stratum V2 Working Group

The participation of both public-company affiliates, such as Block Inc. and the MARA Foundation, and major independent pools like F2Pool and Antpool suggests broad institutional and operational interest. According to secondary coverage, the seven new participants may represent a meaningful share of global Bitcoin hashrate, though no single source quantified the combined figure.

Bitcoin trades at $81,209, up roughly 0.72% over 24 hours, with a market capitalization of approximately $1.63 trillion, underscoring the economic scale of the network these pools help secure.

The network’s mining difficulty stood at 132.47 trillion at the time of this report, with over 814,000 daily transactions processed. These figures highlight the infrastructure load that Stratum V2 could help optimize.

Why Stratum V2 Matters for Bitcoin Mining

Stratum V2 is a next-generation protocol for communication between Bitcoin miners and mining pools. It replaces the original Stratum protocol, which has been in use since 2012 but lacks encryption and gives pools full control over block template construction.

The upgraded protocol secures miner-to-pool traffic with encryption and authentication, addressing longstanding concerns about man-in-the-middle attacks and hashrate hijacking. It also allows miners to construct their own block templates, a shift that decentralizes a critical part of the mining process.

On the efficiency side, Stratum V2 can increase mining profits by up to 7.4% and reduce bandwidth usage by approximately 60% for pools and 70% for miners. At Bitcoin’s market capitalization of roughly $1.63 trillion, even marginal efficiency gains translate to meaningful dollar amounts.

The independent open-source working group was originally formed in October 2022 to coordinate development and standardization efforts. Adding seven major pools in a single expansion represents the largest influx of participants since the group’s formation.

What the Working Group Expansion Could Mean Next

Pavlenex, a contributor to the Stratum V2 project, described the Working Group as “a technical coordination forum focused on advancing adoption through specification alignment, interoperability testing, and real-world implementation feedback.”

“The Working Group is a technical coordination forum focused on advancing adoption through specification alignment, interoperability testing, and real-world implementation feedback.”

— Pavlenex, via Blockspace

Joining a working group signals engagement with the protocol, but it does not mean these pools have deployed Stratum V2 in production. The immediate focus appears to be on testing, specification alignment, and ensuring different implementations can interoperate reliably.

Broader pool participation could accelerate the timeline for Stratum V2 becoming a practical standard rather than a niche option. As new blockchain infrastructure launches continue across the industry, mining-layer upgrades represent a parallel track of protocol maturation.

The development also arrives alongside shifting capital flows in crypto markets. Investor behavior is evolving across regions, and mining infrastructure improvements could factor into how institutional participants evaluate Bitcoin’s operational resilience.

Meanwhile, emerging projects like the KnoxNet dual-domain Layer-1 network illustrate how protocol-level innovation continues to shape the broader crypto landscape beyond mining.

Next steps for the working group likely include cross-implementation testing among the new members, with production deployments following only after interoperability benchmarks are met. The Fear and Greed Index sits at 47, reflecting neutral market sentiment as this infrastructure-level development unfolds.

Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency and digital asset markets carry significant risk. Always do your own research before making decisions.