What is the 13F Pro Quality Score for CLIR?

13F Pro ranks ClearSign Technologies Corp (CLIR) on the 13F Pro Quality Score, a 0–100 composite of 32 fundamental signals including return on invested capital, free cash flow consistency, balance-sheet strength, earnings quality, growth durability, and valuation discipline. The score refreshes after each 10-K and 10-Q filing on SEC EDGAR. View CLIR's current score at https://13fpro.ai/company/CLIR (free sign-up required for the full ranking).

Where does 13F Pro source CLIR data?

All ClearSign Technologies Corp fundamentals and ownership data come directly from SEC EDGAR. ClearSign Technologies Corp files with the SEC under CIK 1434524. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

What sector is CLIR in?

ClearSign Technologies Corp (CLIR) is classified in the Technology sector. 13F Pro publishes sector-level fund flow analysis and quality leaders at https://13fpro.ai/research/sector/technology.

How often is CLIR research updated on 13F Pro?

CLIR's fundamentals refresh within hours of each new 10-K or 10-Q filing on SEC EDGAR. Institutional ownership updates after each quarterly 13F filing window. Insider transactions update after each Form 4 filing. The 13F Pro Quality Score recalculates after every fundamentals refresh.

ClearSign Technologies Corp(CLIR)Stock Analysis

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13F Pro Quality Score

29.6/100

Rank #2,526 of 2,962 stocks

View Technology peers →

Rankings refresh quarterly once 80% of peers have filed (~45 days after quarter-end). Next update: ~Nov 14, 2026.

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Two-page plain-English analysis: business, thesis, and three scenarios for the next two years. Refreshed every quarter.

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Why CLIR Scores 30/100

exact factor attribution · 2026-09-11

CLIR's composite is driven by revenue growth, held back by scale and free cash flow. Bars show each factor's exact push vs. a median company, using the same weights the ranking engine applies.

Revenue growth

+8.4 pts

92th pct

Earnings growth

+0.9 pts

68th pct

Institutional flow

-1.6 pts

17th pct

Shareholder dilution

-1.8 pts

15th pct

Capital efficiency

-3.9 pts

11th pct

Earnings quality

-4.5 pts

5th pct

Profitability

-5.4 pts

14th pct

Free cash flow

-5.7 pts

12th pct

Scale

-6.6 pts

6th pct

Factor percentiles are cross-sectional ranks across the ~2,800-stock scored universe, computed from SEC EDGAR filings. Not investment advice.

CLIR Stock Analysis & AI Quality Score

Data updated 2026-09-11

AI stock analysis and institutional research for ClearSign Technologies Corp (CLIR), a Technology sector company. 13F Pro's AI-powered ranking engine scores CLIR at 29.6/100 on a 32-signal composite quality model, placing it at rank #2,526 of 2,962 stocks — the bottom half of the AI-ranked universe. Based on the latest XBRL financial filings (Q2 2026), ClearSign Technologies Corp reports quarterly revenue of $560.0K, net income of $-1.3M. Top institutional holders of CLIR by reported 13-F value include VANGUARD CAPITAL MANAGEMENT, SIMON QUICK ADVISORS, GEODE CAPITAL MANAGEMENT, based on the most recent SEC filings. CLIR trades on the Nasdaq exchange and files with the SEC under CIK 1434524. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate CLIR daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for ClearSign Technologies Corp directly from SEC EDGAR. ClearSign Technologies Corp's 13F Pro composite quality score has ranged between 10 and 30 since 2026, currently 29.6 — an improving long-term trajectory across 8 quarterly and live scoring snapshots.

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Fun facts about ClearSign Technologies Corp

Quirks, history, and lore behind CLIR — the kind of stuff that makes a stock memorable.

1
The Basics
A small-cap U.S. technology company headquartered in Seattle, Washington, focused on improving industrial combustion systems.
2
The Numbers
With minimal revenue and a market cap in the tens of millions, this is a pre-commercial-stage company — its balance sheet is more about R&D spend than sales.
3
The History
Founded in the early 2010s, it was built around patented technology originally developed to make industrial burners cleaner and more efficient.
4
The Secret
Its core innovation applies electric fields to flames — a physics trick that can reduce emissions and fuel consumption without a full equipment overhaul.
5
The Lore
Its technology targets oil refineries, boilers, and process heaters — the unsexy workhorses of heavy industry that account for a surprising chunk of global NOx and CO2 emissions.
6
The Giveaway
The name says it all: clear skies, sign of cleaner combustion — this flame-electrification pioneer trades under the ticker CLIR.

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Revenue

Q2 2026

$560.0K

Net Income

Q2 2026

$-1.3M

ROIC

Q2 2026

-60.9%

Period

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro

Revenue

+45.6% YoY

$5.2MFY 2025

FY22 $374.0KFY23 $2.4MFY24 $3.6MFY25 $5.2M

Net Income

-3.7% YoY

$-5.5MFY 2025

FY22 $-5.8MFY23 $-5.2MFY24 $-5.3MFY25 $-5.5M

Operating Income

-2.8% YoY

$-6.7MFY 2025

FY22 $-6.1MFY23 $-6.0MFY24 $-6.5MFY25 $-6.7M

EPS (Diluted)

+8.3% YoY

$-0.99FY 2025

FY22 $-0.16FY23 $-0.13FY24 $-1.08FY25 $-0.99

Total Assets

-23.5% YoY

$12.2MFY 2025

FY22 $10.9MFY23 $7.6MFY24 $15.9MFY25 $12.2M

Total Debt

—FY 2025

FY22 —FY23 —FY24 —FY25 —

Op. Cash Flow

-8.3% YoY

$-4.7MFY 2025

FY22 $-5.0MFY23 $-3.2MFY24 $-4.4MFY25 $-4.7M

Free Cash Flow

-7.4% YoY

$-4.7MFY 2025

FY22 $-5.0MFY23 —FY24 $-4.4MFY25 $-4.7M

Metric	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020
Revenue	$5.2M +45.6%	$3.6M +49.6%	$2.4M +542.5%	$374.0K -38.4%	$607.0K	$0.00
Net Income	$-5.5M -3.7%	$-5.3M -2.0%	$-5.2M +9.8%	$-5.8M +27.0%	$-7.9M -14.6%	$-6.9M
Operating Income	$-6.7M -2.8%	$-6.5M -8.5%	$-6.0M +2.2%	$-6.1M +24.9%	$-8.1M -17.5%	$-6.9M
EPS (Diluted)	$-0.99 +8.3%	$-1.08 -730.8%	$-0.13 +18.8%	$-0.16 +36.0%	$-0.25	—
Total Assets	$12.2M -23.5%	$15.9M +108.9%	$7.6M -30.3%	$10.9M +16.7%	$9.4M -15.8%	$11.1M
Total Debt	—	—	—	—	—	$251.0K
Operating Cash Flow	$-4.7M -8.3%	$-4.4M -35.3%	$-3.2M +35.2%	$-5.0M +25.6%	$-6.7M -12.5%	$-6.0M
Free Cash Flow	$-4.7M -7.4%	$-4.4M	—	$-5.0M +26.2%	$-6.8M -13.4%	$-6.0M

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Available Research

13F Pro tracks comprehensive data for ClearSign Technologies Corp including:

SEC EDGAR filings (10-K, 10-Q, 8-K)

XBRL financial facts (revenue, EPS, margins)

Insider transactions (Form 4)

Institutional 13F holdings

Quality rankings (32 signals)

AI analyst debates & daily meetings

Historical financial trends

Peer comparison & sector analysis

Top Institutional Holders of CLIR

VANGUARD CAPITAL MANAGEMENT LLC
$386.9K105,429 sh
SIMON QUICK ADVISORS, LLC
$221.4K60,314 sh
GEODE CAPITAL MANAGEMENT, LLC
$188.9K51,457 sh
Cambridge Investment Research Advisors, Inc.
$163.0K44,300 sh
Beacon Pointe Advisors, LLC
$99.7K27,173 sh
VANGUARD FIDUCIARY TRUST CO
$86.1K23,460 sh
HighTower Advisors, LLC
$83.2K22,662 sh
CITADEL ADVISORS LLC
$75.5K20,565 sh
BlackRock, Inc.
$71.6K19,503 sh
DDD Partners, LLC
$44.0K12,000 sh

Fund	Value	Shares
VANGUARD CAPITAL MANAGEMENT LLC	$386.9K	105,429
SIMON QUICK ADVISORS, LLC	$221.4K	60,314
GEODE CAPITAL MANAGEMENT, LLC	$188.9K	51,457
Cambridge Investment Research Advisors, Inc.	$163.0K	44,300
Beacon Pointe Advisors, LLC	$99.7K	27,173
VANGUARD FIDUCIARY TRUST CO	$86.1K	23,460
HighTower Advisors, LLC	$83.2K	22,662
CITADEL ADVISORS LLC	$75.5K	20,565
BlackRock, Inc.	$71.6K	19,503
DDD Partners, LLC	$44.0K	12,000

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Is CLIR a good stock to buy?

13F Pro's AI-powered analysis of ClearSign Technologies Corp (CLIR) draws on SEC EDGAR-sourced fundamentals, institutional 13F holdings, and insider Form 4 transactions in the Technology sector (listed on Nasdaq). The 32-signal AI Quality Score, current rank, and full bull/bear verdict for CLIR are available on the CLIR stock profile dashboard — with the same data, AI insights, ratios, and institutional activity refreshed after every 10-K, 10-Q, 13F, and Form 4 filing. CLIR is classified as a small company.

Which hedge funds own CLIR?

Institutional investors are required to disclose their holdings quarterly via SEC Form 13F. 13F Pro aggregates these filings to show which hedge funds, mutual funds, and asset managers are buying or selling CLIR. Combined with insider transaction data from Form 4 filings and AI-powered analysis from 10 specialized research agents, 13F Pro provides a comprehensive view of ClearSign Technologies Corp's investment landscape.