What is the 13F Pro Quality Score for ADTN?

13F Pro ranks ADTRAN Holdings, Inc. (ADTN) 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 ADTN's current score at https://13fpro.ai/research/ADTN (free sign-up required for the full ranking).

Where does 13F Pro source ADTN data?

All ADTRAN Holdings, Inc. fundamentals and ownership data come directly from SEC EDGAR. ADTRAN Holdings, Inc. files with the SEC under CIK 926282. 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 ADTN in?

ADTRAN Holdings, Inc. (ADTN) 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 ADTN research updated on 13F Pro?

ADTN'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.

ADTRAN Holdings, Inc.(ADTN)Stock Analysis

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13F Pro Quality Score

41.6/100

Rank #1,888 of 2,879 stocks

View Technology peers →

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

Revenue Growth

23.0/100

Profitability

40.7/100

Balance Sheet

26.4/100

Earnings Quality

30.0/100

Free Cash Flow

55.4/100

Institutional Flow

90.7/100

Revenue Scale

50.8/100

Dilution Risk

59.0/100

ADTN Stock Analysis & AI Quality Score

AI stock analysis and institutional research for ADTRAN Holdings, Inc. (ADTN), a Technology sector company. 13F Pro's AI-powered ranking engine scores ADTN at 41.6/100 on a 32-signal composite quality model, placing it at rank #1,888 of 2,879 stocks — the bottom half of the AI-ranked universe. ADTN scores in the top quartile across institutional flow (90.7). Areas of concern include revenue growth (23.0) and balance sheet strength (26.4), which score below median versus the broader universe. Based on the latest XBRL financial filings (Q1 2026), ADTRAN Holdings, Inc. reports quarterly revenue of $286.1M, net income of $-1.3M, an operating margin of 2.2%. Top institutional holders of ADTN by reported 13-F value include BlackRock,, VANGUARD PORTFOLIO MANAGEMENT, VANGUARD CAPITAL MANAGEMENT, based on the most recent SEC filings. ADTN trades on the Nasdaq exchange and files with the SEC under CIK 926282. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate ADTN 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 ADTRAN Holdings, Inc. directly from SEC EDGAR. ADTRAN Holdings, Inc.'s 13F Pro composite quality score has ranged between 34 and 43 since 2024, currently 41.6 — a stable long-term trajectory across 15 quarterly and live scoring snapshots.

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Fun facts about ADTRAN Holdings, Inc.

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

1
The Basics
U.S. technology company · small-cap · listed on Nasdaq · headquartered in Huntsville, Alabama — yes, Alabama.
2
The Numbers
Annual revenue in the range of roughly $1 billion, serving telecom carriers worldwide who are desperate to modernize their aging networks.
3
The History
Founded in 1926 and later reinvented for the digital age, it has spent decades supplying the backbone equipment that keeps phone and broadband networks humming.
4
The Secret
Its sweet spot is open, disaggregated networking — the movement to break apart proprietary telecom gear so carriers aren't locked into one vendor forever.
5
The Lore
It merged with German networking firm ADVA Optical Networking in 2022, doubling its scale and giving it a much stronger foothold in European fiber and optical transport markets.
6
The Giveaway
A Huntsville, Alabama telecom-equipment maker whose ticker is four letters and whose name is basically a portmanteau of two networking companies that became one.

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Revenue

Q1 2026

$286.1M

Net Income

Q1 2026

$-1.3M

Free Cash Flow

Q1 2026

$5.2M

Operating Margin

Q1 2026

2.2%

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro+

Revenue

+17.5% YoY

$1.08BFY 2025

FY18 $529.3MFY19 $530.1MFY24 $922.7MFY25 $1.08B

Net Income

+90.1% YoY

$-45.7MFY 2025

FY18 $-19.3MFY19 $-53.0MFY24 $-459.9MFY25 $-45.7M

Operating Income

+96.4% YoY

$-15.6MFY 2025

FY18 $-45.4MFY19 $-40.0MFY24 $-427.6MFY25 $-15.6M

EPS (Diluted)

+91.0% YoY

$-0.52FY 2025

FY18 $-0.40FY19 $-1.11FY24 $-5.79FY25 $-0.52

Total Assets

+2.8% YoY

$1.20BFY 2025

FY18 $628.0MFY19 $545.1MFY24 $1.17BFY25 $1.20B

Total Debt

—FY 2025

FY18 $27.6MFY19 $49.2MFY24 —FY25 —

Op. Cash Flow

+25.3% YoY

$129.8MFY 2025

FY18 $55.5MFY19 $-2.5MFY24 $103.6MFY25 $129.8M

Metric	FY 2025	FY 2024	FY 2019	FY 2018	FY 2017	FY 2016
Revenue	$1.08B +17.5%	$922.7M +74.1%	$530.1M +0.1%	$529.3M -20.6%	$666.9M +4.7%	$636.8M
Net Income	$-45.7M +90.1%	$-459.9M -768.0%	$-53.0M -173.9%	$-19.3M -181.1%	$23.8M -32.3%	$35.2M
Operating Income	$-15.6M +96.4%	$-427.6M -969.9%	$-40.0M +12.0%	$-45.4M -221.5%	$37.4M +8.1%	$34.6M
EPS (Diluted)	$-0.52 +91.0%	$-5.79 -421.6%	$-1.11 -177.5%	$-0.40 -181.6%	$0.49 -31.9%	$0.72
Total Assets	$1.20B +2.8%	$1.17B +114.9%	$545.1M -13.2%	$628.0M -6.1%	$669.1M +0.3%	$667.2M
Total Debt	—	—	$49.2M +78.3%	$27.6M -0.7%	$27.8M -3.5%	$28.8M
Operating Cash Flow	$129.8M +25.3%	$103.6M +4289.8%	$-2.5M -104.5%	$55.5M +230.9%	$-42.4M -200.9%	$42.0M

AI Insight: ADTN Financial Trends

ADTRAN achieved operating profitability in Q4 2025 after seven consecutive quarters of losses, though revenue declined 2% sequentially in Q1 2026.

• Revenue grew steadily from $226M in Q2 2024 to $292M in Q4 2025, representing 29% growth over six quarters.

• Operating income turned positive at $4M in Q4 2025 after operating losses ranging from $3M to $33M in prior quarters.

• Net losses narrowed significantly from $55M in Q4 2024 to $1M in Q1 2026.

⚠ Revenue declined to $286M in Q1 2026 from $292M in Q4 2025, breaking six-quarter growth streak.

⚠ Operating cash flow volatility with swings from $5M to $43M across recent quarters signals uneven cash generation.

AI Insight: ADTN Ratio Trends

ADTRAN achieved first positive operating margin in Q4 2025 at 1.5%, improving to 2.2% in Q1 2026 after eight quarters of losses.

• Operating margin turned positive in Q4 2025 at 1.5%, expanding to 2.2% in Q1 2026 from -14.4% in Q3 2024.

• Net profit margin improved from -10.8% in Q3 2024 to -0.5% in Q1 2026, nearing breakeven profitability.

• ROA steadily recovered from -18.8% in Q4 2024 to -0.4% in Q1 2026, approaching positive territory.

⚠ TTM operating margin at -0.5% still negative despite recent quarterly improvements, indicating fragile turnaround momentum.

⚠ Company remains unprofitable with -0.5% net margin in Q1 2026, requiring sustained execution to reach consistent profitability.

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Available Research

13F Pro tracks comprehensive data for ADTRAN Holdings, Inc. 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 ADTN

BlackRock, Inc.
$98.6M7,840,254 sh
VANGUARD PORTFOLIO MANAGEMENT LLC
$60.0M4,771,452 sh
VANGUARD CAPITAL MANAGEMENT LLC
$43.1M3,426,230 sh
ROYCE & ASSOCIATES LP
$39.3M3,127,403 sh
DnB Asset Management AS
$39.3M3,123,679 sh
STATE STREET CORP
$29.6M2,350,737 sh
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
$25.0M1,989,530 sh
MILLENNIUM MANAGEMENT LLC
$23.9M1,896,411 sh
MORGAN STANLEY
$23.1M1,832,872 sh
GEODE CAPITAL MANAGEMENT, LLC
$22.9M1,819,123 sh

Fund	Value	Shares
BlackRock, Inc.	$98.6M	7,840,254
VANGUARD PORTFOLIO MANAGEMENT LLC	$60.0M	4,771,452
VANGUARD CAPITAL MANAGEMENT LLC	$43.1M	3,426,230
ROYCE & ASSOCIATES LP	$39.3M	3,127,403
DnB Asset Management AS	$39.3M	3,123,679
STATE STREET CORP	$29.6M	2,350,737
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	$25.0M	1,989,530
MILLENNIUM MANAGEMENT LLC	$23.9M	1,896,411
MORGAN STANLEY	$23.1M	1,832,872
GEODE CAPITAL MANAGEMENT, LLC	$22.9M	1,819,123

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Is ADTN a good stock to buy?

13F Pro's AI-powered analysis of ADTRAN Holdings, Inc. (ADTN) 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 ADTN are available on the ADTN 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.

Which hedge funds own ADTN?

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 ADTN. 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 ADTRAN Holdings, Inc.'s investment landscape.