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Disclosery

MNTK MONTAUK RENEWABLES INC

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COMMON STOCK (common), issuer CIK 1826600

91 managers (94 13F filers) reported a position in MNTK shares at 2026-03-31, 20,809,092 shares in all. 17 filers opened a position and 9 filers sold out during the quarter.

Managers
91
13F filers
94
New
17
Added
29
Reduced
30
Sold out
9
Shares held by filers
20,809,092

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.4,218,997$4.85M<0.01%-105,28913F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding3,533,754$4.06MnewTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,759,278$2.02M<0.01%+34,34513F-HRTimelineGroup
Baader Bank Aktiengesellschaft1,605,000$1.85M0.18%013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,365,473$1.57M<0.01%-20,48713F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC1,038,917$1.19M<0.01%+929,54113F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC954,468$1.1M<0.01%-64313F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP736,584$847K<0.01%-95,95013F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co520,611$599K<0.01%-24,03813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP505,374$581K<0.01%+39,63913F-HRTimelineGroup
Hosking Partners LLP396,932$456K0.02%+68213F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC354,600$408K<0.01%+11,90013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC331,189$381K<0.01%+135,15713F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP311,950$359K<0.01%-26,26913F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP289,894$333K0.02%+47,24813F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY261,398$301K<0.01%-67,26413F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC206,854$238K<0.01%+181,20413F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP204,636$235K<0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp195,907$225K<0.01%-13,66113F-HRTimelineGroup
JTC Employer Solutions Trustee Ltd197,859$217K0.02%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO162,252$193K<0.01%-9,94013F-HR/ATimelineGroup
ALLIANCEBERNSTEIN L.P.97,520$163K<0.01%013F-HRTimeline
Nuveen, LLCin group TIAA139,608$161K<0.01%+85813F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.118,256$136K<0.01%-74,09213F-HRTimelineGroup
Rathbones Group PLC102,000$117K<0.01%+10,00013F-HR/ATimeline
RHUMBLINE ADVISERS93,078$107K<0.01%-3,63013F-HRTimeline
J. Derek Lewis & Associates Inc.85,000$97.8K0.02%new13F-HR/ATimeline
STOREBRAND ASSET MANAGEMENT AS82,175$94.5K<0.01%-17,23213F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/60,707$69.8K<0.01%+1,55813F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC56,106$62K<0.01%+44,17413F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\47,007$54.1K<0.01%013F-HRTimelineGroup
UBS Group AGin group UBS Group AG41,867$48.1K<0.01%-27,18913F-HRTimelineGroup
STRS OHIO40,000$46K<0.01%013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC38,351$44.1K<0.01%+23,79413F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.37,339$42.9K<0.01%+6,28413F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC35,893$41.3K<0.01%new13F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC35,576$39.5K<0.01%-95,11113F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/33,876$39K<0.01%013F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…32,892$37.8K<0.01%+76613F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …32,288$37.1K<0.01%013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…31,293$35.5K<0.01%-1,29513F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC29,205$33.6K<0.01%013F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd26,928$31K<0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN25,214$29K<0.01%-49,83513F-HR/ATimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…24,495$28.2K<0.01%+8,68313F-HRTimelineGroup
Boyer Financial Services, Inc.22,990$26.4K0.03%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …18,967$21.8K<0.01%-1,61513F-HRTimelineGroup
Engineers Gate Manager LP18,628$21.4K<0.01%+5,05413F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC17,748$20.4K<0.01%-13,73813F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…17,233$19.8K<0.01%+11,35813F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC16,744$19.3K<0.01%+4,21913F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC16,469$18.9K<0.01%-20,82413F-HRTimeline
Police & Firemen's Retirement System of…16,326$18.8K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC15,781$18.1K<0.01%+8,51813F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC14,810$17K<0.01%new13F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS14,701$16.9K<0.01%+29413F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd14,173$16.3K<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC13,694$15.7K<0.01%013F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC11,738$13.5K<0.01%new13F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.10,871$12.5K<0.01%+45313F-HRTimelineGroup
N.E.W. Advisory Services LLC10,000$11.5K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP9,259$11.2K<0.01%new13F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…7,852$9.03K<0.01%-47213F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…6,625$7.62K<0.01%013F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc5,771$6.61K<0.01%-29013F-HRTimelineGroup
SIMPLEX TRADING, LLC4,915$5.65K<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.4,000$4.6K<0.01%new13F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…3,641$4.19K<0.01%-49713F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND3,365$3.87K<0.01%013F-HRTimeline
Ninety One SA (Pty) Ltd3,110$3.42K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA3,008$3K<0.01%+1,00613F-HRTimelineGroup
CWM, LLCin group CWM, LLC2,274$2.62K<0.01%+1,14713F-HRTimelineGroup
Sterling Capital Management LLC1,846$2.12K<0.01%-1,29913F-HRTimeline
TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU…1,200$1.38K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
FMR LLCin group FMR LLC810$932<0.01%-8,34813F-HRTimelineGroup
Optiver Holding B.V.in group Optiver Holding B.V.636$731<0.01%-44813F-HR/ATimelineGroup
GAMMA Investing LLC339$390<0.01%-5,66313F-HRTimeline
IFP Advisors, Inc188$216<0.01%new13F-HRTimeline
Essential Partners LLC187$215<0.01%+16513F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…133$153<0.01%-15513F-HRTimelineGroup
SBI Securities Co., Ltd.116$133<0.01%+10213F-HRTimeline
Farther Finance Advisors, LLC82$93<0.01%+2213F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…69$79<0.01%-5413F-HR/ATimelineGroup
True Wealth Design, LLC57$66<0.01%+4513F-HRTimeline
ROTHSCHILD INVESTMENT LLC25$29<0.01%-6113F-HRTimeline
MAI Capital Management21$25<0.01%new13F-HRTimeline
Sunbelt Securities, Inc.13$15<0.01%new13F-HRTimeline
Arax Advisory Partners5$7<0.01%new13F-HRTimeline
Allworth Financial LP5$6<0.01%-1013F-HRTimeline
Caitong International Asset Management …2$2<0.01%new13F-HRTimeline
Covestor Ltd64$00%+4213F-HRTimelineValue filed as zero, left out of ratios.