"Seven of the largest names in bitcoin mining formally joined the Stratum V2 Working Group this week, signaling the clearest industry shift yet toward miner-controlled transaction selection. Antpool, F2pool, Foundry, and 4 others joined the Stratum V2 Working Group on May 7, 2026. Stratum V2 offers miners up to 7.4% higher profitability through lower latency and better fee capture."
"Stratum V2 replaces Stratum V1, a push-based protocol released in 2012 by Marek Slush Palatinus that became the industry default but was never designed as a formal standard. V1 left pools in full control of transaction selection, ran in plaintext, and exposed miners to hashrate hijacking and surveillance. The newer protocol addresses those problems."
"It uses end-to-end authenticated encryption, cuts bandwidth use by roughly 60% on the pool side and 70% for miners, and introduces a Job Declaration sub-protocol that lets miners build their own block templates instead of accepting what pools assign. According to the official announcement, By maintaining Stratum V2 as a public, vendor-neutral specification, we remove compatibility barriers and allow the ecosystem to focus on what matters most: improving efficiency, privacy, security, and miner autonomy, ultimately leading to increased profitability."
"Real-world tests from Braiins show miners can capture up to 7.4% higher profitability through faster template delivery, lower latency, and improved fee selection when running V2 natively. Braiins and Spiral founded the Working Group in 2022, now entering a new deployment phase in 2026. Antpool, F2pool, Foundry, Spiderpool, Block Inc., MARA Foundation, and DMND are now part of the effort to advance the open mining protocol standard."
Seven major bitcoin mining firms joined the Stratum V2 Working Group on May 7, 2026, including Antpool, F2pool, Foundry, Spiderpool, Block Inc., MARA Foundation, and DMND. Stratum V2 is positioned as a replacement for Stratum V1, which left pools in full control of transaction selection and exposed miners to hashrate hijacking and surveillance. Stratum V2 uses end-to-end authenticated encryption, reduces bandwidth usage by about 60% on the pool side and 70% for miners, and adds a Job Declaration sub-protocol that lets miners build block templates instead of accepting pool-assigned templates. The protocol is maintained as a public, vendor-neutral specification to improve efficiency, privacy, security, and miner autonomy. Tests indicate miners can capture up to 7.4% higher profitability when running V2 natively.
Read at news.bitcoin.com
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