After soaring 451% in 2025, shares of The Metals Company (NASDAQ: TMC) reversed course sharply, falling 28.2% through the first six months of 2026.
The decline stands in stark contrast to last year’s explosive rally, which was fueled by optimism surrounding deep-sea mining and critical mineral production.
Data provided by S&P Global Market Intelligence confirmed the significant first-half drop for the deep-sea mining company’s stock.
Despite the poor share price performance, the company has actually reported a series of meaningful regulatory and operational developments in 2026.
In May, the National Oceanic and Atmospheric Administration found The Metals Company’s application for an exploration license and commercial recovery permit to be in full compliance with the Deep Seabed Hard Mineral Resources Act and its regulations.
Later that same month, The Metals Company announced an agreement with Allseas, an offshore pipeline developer and specialist in subsea construction, for the development, commissioning, and operation of the first commercial nodule collection system.
That system carries an estimated annual production capacity of 3 million wet metric tons, representing a significant step toward the company’s commercial ambitions.
As May drew to a close, NOAA certified The Metals Company’s USA B exploration license application, covering approximately 122,000 square kilometers of seafloor containing around 1.02 billion metric tons of polymetallic nodules.
Those nodules contain high grades of nickel, cobalt, copper, manganese, and several rare-earth elements, underlining the strategic value of the company’s targeted seabed territory.
The Metals Company has long faced obstacles, including bureaucratic red tape and pushback from environmental advocates, as it works to launch commercial operations.
The original 2025 rally was sparked in April of that year, when President Trump issued executive orders aimed at spurring domestic production of critical minerals and deep-sea mining specifically.
With no clear negative catalysts driving the 2026 decline, analysts suggest the sell-off largely reflects investors taking profits following the prior year’s massive gains.
For companies at The Metals Company’s stage of development, with no commercial operations yet generating revenue, significant stock volatility is widely considered a normal characteristic.
Investors watching TMC are now looking ahead to the company’s second-quarter 2026 earnings report, expected later this summer, for further clarity on its progress.
