NioCorp Developments to Be Added to Russell 3000(R) Index

CENTENNIAL, CO / ACCESS Newswire / June 23, 2025 / NioCorp Developments Ltd. ("NioCorp" or the "Company") (NASDAQ:NB) is pleased to announce that it will be added as a member of the broad-market Russell 3000Index, effective after the U.S. market opens on June 30, 2025, as part of the 2025 Russell indexes reconstitution.

The annual reconstitution of the Russell US Indexes captures the 4,000 largest U.S. stocks as of April 30, ranking them by total market capitalization. Membership in the Russell 3000 Index, which remains in place for one year, means automatic inclusion in the small-cap Russell 2000 Index as well as the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes primarily by objective, market-capitalization rankings and style attributes.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. According to data as of the end of June 2024, about $10.6 trillion in assets are benchmarked against the Russell US indexes, which belong to FTSE Russell, the global index provider.

FTSE Russell is wholly owned by London Stock Exchange Group.

# # #

FOR MORE INFORMATION:

Jim Sims, Corporate Communications Officer, NioCorp Developments Ltd., [phone], [e-mail]

@NioCorp $NB #Niobium #Scandium #rareearth #neodymium #dysprosium #terbium #ElkCreek #China #exportban #Pentagon

ABOUT NIOCORP

NioCorp is developing a critical minerals project in Southeast Nebraska that is expected to produce niobium, scandium, and titanium (the "Elk Creek Project"). The Company also is evaluating the potential to produce several rare earths from the Elk Creek Project. Niobium is used to produce specialty alloys as well as High Strength, Low Alloy steel, which is a lighter, stronger steel used in automotive, structural, and pipeline applications. Scandium is a specialty metal that can be combined with Aluminum to make alloys with increased strength and improved corrosion resistance. Scandium is also a critical component of advanced solid oxide fuel cells. Titanium is used in various lightweight alloys and is a key component of pigments used in paper, paint and plastics and is also used for aerospace applications, armor, and medical implants. Magnetic rare earths, such as neodymium, praseodymium, terbium, and dysprosium are critical to the making of neodymium-iron-boron magnets, which are used across a wide variety of defense and civilian applications.