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MNTK · Montauk Renewables, Inc.
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MNTK Montauk Renewables (MNTK) Insider Trading, Ownership & Congress Trades

Utilities · Gas & other services combined · CIK 0001826600
Quote by TradingView
SEC filings
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
51
13F, latest reported quarter

What the filings say about MNTK

Insiders, 180 days
+$25.4K net bought
1 buyer

Montauk Renewables insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, Montauk Renewables, Inc. insiders bought a net $25.4K of stock across 5 Form 4 purchases and sales, with 1 insider buying. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Copelyn John A
Director
BUY
2026-05-13 SECtraded 2026-05-11
17,506
$25.4K
+33.3%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 100.0% of the 17,506 shares held after it.
  • No other insider bought within 30 days.
  • 51 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Copelyn John A bought about $25.4K of MNTK on May 11, 2026, the largest insider purchase at the company on our record; 51 funds added in the latest 13F quarter.
Hill Scott E
VP of Business Development
SELL
2022-11-29 SECtraded 2022-11-28
101,797
$1.2M
-82.1%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 16.3% of the 622,810 shares held after it.
  • 1 other insider sold within 30 days.
  • 51 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: VP of Business Development Hill Scott E sold about $1.2M of MNTK on Nov 28, 2022, the largest insider sale at the company on our record; 1 other insider sold within 30 days and 51 funds added in the latest 13F quarter.
Hill Scott E
VP of Business Development
SELL
2022-11-29 SECtraded 2022-11-28
2,350
$29.8K
-82.1%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 0.4% of the 620,460 shares held after it.
  • 1 other insider sold within 30 days.
  • 51 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: VP of Business Development Hill Scott E sold about $29.8K of MNTK on Nov 28, 2022, the largest insider sale at the company on our record; 1 other insider sold within 30 days and 51 funds added in the latest 13F quarter.
McClain Sean F
President and CEO
SELL
2022-11-29 SECtraded 2022-11-28
57,750
$697.0K
-82.1%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 7.6% of the 760,239 shares held after it.
  • 1 other insider sold within 30 days.
  • 51 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: President and CEO McClain Sean F sold about $697.0K of MNTK on Nov 28, 2022, the largest insider sale at the company on our record; 1 other insider sold within 30 days and 51 funds added in the latest 13F quarter.
McClain Sean F
President and CEO
SELL
2022-11-29 SECtraded 2022-11-28
2,250
$28.5K
-82.1%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 0.3% of the 757,989 shares held after it.
  • 1 other insider sold within 30 days.
  • 51 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: President and CEO McClain Sean F sold about $28.5K of MNTK on Nov 28, 2022, the largest insider sale at the company on our record; 1 other insider sold within 30 days and 51 funds added in the latest 13F quarter.
5 transactions on record · a thin record, read with care
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
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Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net +$25.4K over 180 days
more than 71% of Utilities
Congress
no House purchase disclosed in the last 12 months
Funds
51 funds bought in last quarter
below 80% of Utilities
Revenue
+0.4% year over year
below 78% of Utilities
Margin
1.0% net margin
below 79% of Utilities
Buybacks
no share repurchases reported
Short interest
2.9% of the float short (float per yahoo 2026-10-26) · 1.9 days to cover · settled 2026-09-30
below 74% of Utilities
What changed in the last 30 days
Nothing new filed in the last 30 days

Watch MNTK

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
-2.3%12M
-49%-22%+6%+33%2025-102025-122026-022026-042026-062026-082026-10 2026-05-11 · Copelyn John A bought $25.4K
Insider buy
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns MNTK: institutional holders (13F)

13F holdings, latest reported quarter
BlackRock, Inc.
4,709,893 sh
$7.3M
VANGUARD CAPITAL MANAGEMENT LLC
2,706,900 sh
$4.2M
GEODE CAPITAL MANAGEMENT, LLC
1,879,292 sh
$2.9M
Baader Bank Aktiengesellschaft
1,605,000 sh
$2.5M
STATE STREET CORP
1,369,693 sh
$2.1M

Congress trades in MNTK

No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

MNTK planned insider sales (Form 144)

No planned-sale notices
No insider has filed to sell. Watch this after a run-up.

MNTK mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
First Trust NASDAQ Clean Edge Green Energy Index Fund
$550.0K position · as of 2026-06-30
0.1%
U.S. Small Cap Equity Fund
$238.7K position · as of 2026-07-31
0.0%
iShares Micro-Cap ETF
$353.2K position · as of 2026-06-30
0.0%
1290 VT Micro Cap Portfolio
$23.4K position · as of 2026-06-30
0.0%
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
$95.0K position · as of 2026-05-31
0.0%
Clearwater Select Equity Fund
$40.0K position · as of 2026-06-30
0.0%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
Insiders are net buyers of their own stock.
The record shows a net $25.4K bought by insiders over 180 days, 51 funds added last quarter. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
EDYORWOKLORGCOCWSTPCGQRHCWMVSTTRGPORASMC

MNTK financials

Revenue growth
+0.4%
XBRL, annual
Net margin
1.0%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$189.1M
four quarters, 2025-07-01 to 2026-06-30
Net margin, TTM
+4.2%
net income over revenue, 2025-07-01 to 2026-06-30
Free cash flow, TTM
-$83.4M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Debt to equity
0.57x
long-term 2026-06-30 plus current 2026-06-30; equity 2026-06-30
Cash flow to debt
0.29x
TTM operating cash flow over long-term 2026-06-30 plus current 2026-06-30
Return on equity
+3.1%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets
+1.9%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on invested capital
n/a
effective tax rate -107%, not meaningful
Return on capital employed
+0.3%
operating income (EBIT proxy) over average of 2025-06-30 and 2026-06-30 minus current liabilities
P/E, trailing
36.00x
close 2026-10-26 over four quarters of diluted EPS, 2025-07-01 to 2026-06-30
Enterprise value
$441.3M
market value at close 2026-10-26 on 2026-07-31 shares, plus long-term 2026-06-30 plus current 2026-06-30, minus cash 2026-06-30
FCF yield
-27.1%
TTM free cash flow over market value at close 2026-10-26
PEG, trailing
0.18x
P/E over trailing EPS growth of 200%: four quarters to 2026-06-30 against the four to 2025-06-30
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-122023-122022-12
Revenue$176.4M$175.7M$174.9M$213.4M
Gross profitn/an/a$45.3M$65.7M
Operating income$852.0K$16.1M$23.6M$44.6M
Net income$1.7M$9.7M$14.9M$35.2M
EPS (diluted)0.010.070.110.25
Operating cash flow$30.3M$43.8M$41.1M$81.1M
Cash$23.8M$45.6M$73.8M$105.2M
Long-term debt$126.0M$43.8M$55.6M$63.5M
SEC XBRL, fiscal years, as known on 2026-10-28

MNTK Stock Sonar score 6/7 axes

Find similar shapesCompare

MNTK ranks highest on financial health (88th percentile) and insider conviction (62nd), and lowest on institutional and government (20th), among Utilities peers.

ProfitHealthGrowthInsidersInstitutionsRisk
Profitability
25
Inputs
  • Return on equity+3.1% · 25 pct, sector of 104
  • Return on assets+1.9% · 34 pct, sector of 120
  • Return on invested capitaleffective tax rate -107%, not meaningful
  • Return on capital employed+0.3% · 16 pct, sector of 107
Financial health
88
Inputs
  • Debt to equity0.57x · 88 pct, sector of 113
  • Cash flow to debt0.29x · 88 pct, sector of 113
Growth
22
Inputs
  • Revenue growth, YoY+0.4% · 22 pct, sector of 119
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Insider conviction
62
Inputs
  • Net Form 4 buying (codes P and S), 180d$25K · 71 pct, sector of 87
  • Insider buyers, 180d1 · 54 pct, sector of 88
Institutional and government
20
Inputs
  • Funds adding, latest quarter51 · 20 pct, sector of 121
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
59
Inputs
  • Short interest, % of float+2.9% · 55 pct, sector of 162
  • Recalls per $1B revenue, 3ynot measured for this sector, almost no peer has an event
  • EPA cases per $1B revenue, 5y0.00 per $1B · 100 pct, sector of 106
  • New text in Risk Factors, latest 10-K+17.5% · 24 pct, sector of 111
1 not measured: US patents
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

6 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

MNTK filings, in plain words

Are Montauk Renewables insiders buying or selling MNTK?

In the 180 days to 2026-10-28, Montauk Renewables insiders were net buyers, a net $25.4K across purchases and sales reported on Form 4, by 1 buyer.

Read the full summary

In the 180 days to 2026-10-28, Montauk Renewables insiders were net buyers of MNTK, a net $25.4K across purchases and sales reported on Form 4 by 1 buyer. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.

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