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Research & education only — not financial advice.TENK is not a registered investment adviser; calls are impersonal, generated from SEC filings and a delayed/third-party price feed, and may be wrong or out of date. The operator and an affiliated trading operation may hold or trade the securities TENK rates — see Disclosures. Do your own research.

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Home›Stocks›MNTK
MNTK logo

MNTK

Montauk Renewables, Inc.

Next earnings Aug 4, 2026 (after close) · consensus $0.00 EPS, $50.3M rev

Last earnings -5.2% on 2026-05-06

Sell
$1.69
▲ +8.33%
$1.69▼ -24.55%
over 1Y
L $1.12H $2.71
Earnings Dividend Split Congress buy Congress sellGrouped by date · hover a pin to expand
Today+8.3%
1W+12.7%
1M-1.2%
3M+48.2%
YTD+0.6%
1Y-24.6%
OverviewFinancialsValuationQualityTimelineFilings
Rating
Sell
Quality
C-
Valuation
Overvalued
Filings
Flagged
Sell
Conviction
Horizon
Medium (3–12mo)
12-mo target
$•••
Street · 11 analysts
Buy

RNG operator with collapsing earnings, halved cash and a debt-fueled capex cycle — a 169x P/E on trough profits offers poor risk/reward.

Net income $1.75M · FY2025

The read

Weak on both the fundamentals and the price — little to like at the current level.

Montauk is a real, 30-year RNG operator with 11 RNG projects and positive operating cash flow ($30.3M), so this is not a distressed shell. But the earnings trajectory is unambiguously deteriorating: net income has fallen from $35.2M (FY2022) to $14.9M, $9.73M, and now just $1.75M in FY2025 — down 82% year-over-year — while operating income cratered 94.7% to $852K, leaving a 0.5% operating margin and 0.7% ROE. Revenue has been dead flat at ~$176M for three straight years, so the profit erosion is a margin/cost story, not a growth story. The $0.01 diluted EPS produces a nonsensical 169x P/E; there is no earnings support for the current price.

The balance sheet is where risk is building. The company is funding an aggressive growth capex cycle — $117M of capex in FY2025 (+87%), roughly 4x operating cash flow — by levering up: long-term debt jumped 188% to $126M while cash was cut nearly in half to $23.8M (-47.9%) and current assets fell 35%. Management's own MD&A flags that impairment charges ($3.2M booked in 2025) could jeopardize compliance with Credit Agreement financial covenants, and that an event of default could accelerate the entire facility. That is the key overhang: a business earning $1.75M net is spending heavily and drawing down liquidity into a covenanted debt structure.

Is MNTK a buy? The one-page verdict, explained →

The options angle

model · matches our verdict
Bear put spread~60d expiry
  • Long put 1.5 @ ~0.08 est
  • Short put 1.5 @ ~0.08 est
debit $0max +$0max $0

SELL verdict, defined risk: profits into weakness down to the short strike; max loss is the net debit.

Open in the calculator →

Educational template, not a trade recommendation. Strikes and premiums are Black-Scholes model estimates from the last close and 30-day realized volatility — real chains, spreads and IV will differ. Options involve substantial risk.

Financials · annual, by fiscal year

Line itemFY21FY22FY23FY24FY25
Revenue$148M$213M$175M$176M$176M
Gross profit$25.4M$65.7M$45.3M——
Operating income$3.33M$44.6M$23.6M$16.1M$852K
Net income-$4.53M$35.2M$14.9M$9.73M$1.75M
Diluted EPS-$0.03$0.25$0.11$0.07$0.01
Net margin-3.1%16.5%8.5%5.5%1.0%

Annual figures from SEC 10-K XBRL filings. Open the filing links below for full statement detail.

Key statistics

Valuation

Enterprise value$346M
EV / EBITDA11.2
EV / Sales2.0
EV / FCF—
P / FCF—
PEG (trailing)—
Earnings yield0.7%
FCF yield-35.8%

Quality & risk

ROIC (est.)0.2%
Free cash flow-$86.2M
Total debt$129M
Net cash-$105M
Altman Z-Score1.44 distress
Piotroski F-Score4/9

Capital returns

Buyback yield0.0%
Dividend yield (est.)—
Shareholder yield0.0%
Shares Δ YoY-0.1%

Computed from SEC XBRL annual figures + the current quote. EV and ROIC use long-term + current debt where filed; estimates, not investment advice.

Disclosure timeline

SEC · 8-Ks + reports
Recent disclosure tone has skewed negative — read the flagged items.
  1. 8-K Shareholder vote2026-05-28

    Annual meeting vote: directors elected, say-on-pay and auditor ratification passed

  2. 8-K Earnings results2026-05-06

    Q1 2026: flat revenue, thin margins as growth capex and higher debt weigh

  3. 10-Q Quarterly report2026-05-06

    Q1 2026: flat revenue, thin margins as growth capex and higher debt weigh

  4. DEF 14A Proxy statement2026-04-10

    2026 proxy: board slate, exec comp and auditor items for annual meeting

  5. 8-K Earnings results2026-03-12

    FY2025 results detail: profit cratered ~82% on impairments and RIN timing

  6. 8-K Earnings results2026-03-11

    FY2025: revenue flat $176M but net income -82% to $1.75M; debt +188%, cash -48%

  7. 10-K Annual report2026-03-11

    FY2025: revenue flat $176M but net income -82% to $1.75M; debt +188%, cash -48%

  8. 8-K Material agreement2026-01-07

    Entered material agreement (likely credit facility) funding the RNG buildout

  9. 8-K Earnings results2025-11-05

    Q3 2025: revenue steady but earnings pressured by RIN timing and rising costs

Recent filings

all on EDGAR ↗
8-KPeriod ending 2026-05-262026-05-28open ↗4Period ending 2026-05-202026-05-22open ↗4Period ending 2026-05-202026-05-22open ↗4Period ending 2026-05-202026-05-22open ↗4Period ending 2026-05-202026-05-22open ↗4Period ending 2026-05-112026-05-13open ↗10-QPeriod ending 2026-03-312026-05-06open ↗8-KPeriod ending 2026-05-062026-05-06open ↗ARSPeriod ending 2025-12-312026-04-10open ↗DEFA14AFiling2026-04-10open ↗DEF 14APeriod ending 2026-05-262026-04-10open ↗8-KPeriod ending 2026-03-122026-03-12open ↗

Quality score

C-
ValueGrowthProfitHealthMom.
ValueC-
GrowthF
ProfitabilityD
Financial healthA-
MomentumC
  • ✓Revenue growing year-over-year
  • ✓Profitable (positive net income)
  • ✗Net margin above 10%
  • ✗Return on equity above 15%
  • ✓Liabilities below 2× equity
  • ✗P/E below 25

Fair value est.

$0.07

Overvalued -96% vs price

cheapfair valueexpensive

Modified Graham: EPS $0.01 × (8.5 + 1.5 × 0.0% growth) × 0.85 quality = 7.3× multiple. An estimate, not a price target.

1.1252-week2.49
Revenue
$176M
+0.4% YoY
Net margin
1.0%
ROE
0.7%
P/E
169.0

SEC fundamentals · FY 2025

'21'22'23'24'25

■ revenue · ■ net income, by fiscal year

Revenue$176M+0.4%
Net income$1.75M-82.0%
Gross profit$45.3M-31.1%
Operating income$852K-94.7%
Diluted EPS$0.01-85.7%
Cash & equivalents$23.8M-47.9%
Total assets$435M+24.8%
Total liabilities$172M+88.1%
Stockholders' equity$263M+2.2%
Gross: 25.7%Op.: 0.5%L/E: 0.65x

Frequently asked

Is Montauk Renewables, Inc. (MNTK) a buy?
MNTK currently carries a Sell rating with 3/5 conviction, derived from its latest SEC filings. RNG operator with collapsing earnings, halved cash and a debt-fueled capex cycle — a 169x P/E on trough profits offers poor risk/reward.
What is MNTK's fair value?
A Modified-Graham model based on MNTK's SEC fundamentals estimates a fair value of about $0.07. It is an estimate from reported earnings, not a price target.
Is MNTK overvalued or undervalued?
Against a Modified-Graham fair-value estimate, MNTK currently appears overvalued relative to its SEC-grounded earnings power.
What is Montauk Renewables, Inc.'s quality score?
MNTK scores 53.36861313868613/100 (grade C-) on a SEC-grounded quality model spanning value, growth, profitability, financial health and momentum.

Sources: SEC EDGAR (CIK 0001826600, latest 10-Q filed 2026-05-06) · EODHD · Proprietary analysis · as of 7/3/2026, 3:24:45 PM.

›About this recommendation — produced by TENK/calls (tenkcalls.com), Luxembourg · not investment advice

AI-generated analysis, produced by our proprietary engine from SEC filing data.

Investment recommendation produced by TENK/calls (tenkcalls.com), Luxembourg. Completed Jul 3, 2026, 11:24 AM ET. Ratings & methodology: definitions · All recommendations to date: track record · Conflicts: disclosures. Not investment advice.

Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.

Insider activity

Form 4 · SEC

Last 90 days: 1 open-market buy · 0 sales

2026-05-20
Shaw James A
Chief Operating Officer
Award283K
2026-05-20
McClain Sean F
President & CEO
Award383K
2026-05-20
Van Asdalan Kevin A
Chief Financial Officer
Award303K
2026-05-20
Ciroli John
Chief Legal Officer
Award303K
2026-05-11
Copelyn John A
Director
Buy17.5K @ $1.45$25.4K
2025-11-24
Frank Sharon R
VP Environ Health & Safety
Tax2.75K @ $1.67$4.59K
2024-11-24
Frank Sharon R
VP Environ Health & Safety
Tax2.75K @ $4.46$12.3K
2023-11-24
Frank Sharon R
VP Environ. Health & Safety
Tax2.66K @ $9.09$24.2K

Earnings history

beat/miss · move
2026-05-06Beat +100.0% est▲ +5.84%8-K ↗
2026-03-12Miss -67.3% est▼ -12.34%8-K ↗
2026-03-11Miss -67.3% est▼ -12.34%8-K ↗
2025-11-05Beat +179.7% est▼ -12.32%8-K ↗
2025-08-07Miss -412.5% est▼ -10.14%8-K ↗
2025-08-06Miss -412.5% est▼ -10.14%8-K ↗

Dates from 8-K (Item 2.02); beat/miss = reported EPS vs consensus (Finnhub, recent quarters); move = prior close → close on/after.

Vs tracked universe

compare →

1195 tracked peers · median

TENK Score53 vs 67
Revenue growth0.4% vs 7.5%
Net margin1.0% vs 10.0%
Return on equity0.7% vs 12.0%
P/E169.0 vs 26.2