Montauk Renewables, Inc. (MNTK) Institutional Ownership

Ownership Summary

The institutional landscape for Montauk Renewables, Inc. (NASDAQ:MNTK) includes 78 filers as of the latest reporting cycle ending December 2025.

• These investors collectively held 15.2% of the company's total shares outstanding in December 2025, down from 15.8% in September 2025.
• On a quarter-over-quarter basis, institutional holdings shifted by -3.58%, with a year-over-year a decrease of 18.75% in the count of filers.
• During the quarter, 26 institutions bought more Montauk Renewables shares, 33 sold shares, and 19 of the 78 total investors held their position steady.
• The total number of shares held by institutions in Montauk Renewables decreased to 19.73Mn as of December 2025, a net change of down by 731.76K shares quarter on quarter, and down 2.20Mn shares year over year.
• With 4.32Mn shares, BlackRock, Inc. commands the largest institutional position in Montauk Renewables as of December 31, 2025, equating to 3.32% of the company.
• Among the most significant buyers of Montauk Renewables during December 2025 were MORGAN STANLEY (91.58K), BlackRock, Inc. (57.52K), DEUTSCHE BANK AG\ (46.78K), GEODE CAPITAL MANAGEMENT, LLC (37.31K), JANE STREET GROUP, LLC (32.36K).
• Leading sellers of Montauk Renewables stock in December 2025 included VANGUARD GROUP INC (422.57K), MILLENNIUM MANAGEMENT LLC (176.09K), DIMENSIONAL FUND ADVISORS LP (143.50K), BARCLAYS PLC (138.28K), NORTHERN TRUST CORP (61.50K).
• The top 10 institutional holders of Montauk Renewables for the quarter ending December 2025 included BlackRock, Inc. (4.32Mn), VANGUARD GROUP INC (3.53Mn), GEODE CAPITAL MANAGEMENT, LLC (1.72Mn), Baader Bank Aktiengesellschaft (1.60Mn), STATE STREET CORP (1.39Mn), AMERICAN CENTURY COMPANIES INC (955.11K), DIMENSIONAL FUND ADVISORS LP (832.53K), CHARLES SCHWAB INVESTMENT MANAGEMENT INC (544.65K), NORTHERN TRUST CORP (465.74K), Hosking Partners LLP (396.25K).