Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

ADTRAN Holdings, Inc.

ADTN · Nasdaq · CIK 0000926282 · Technology · Communication Equipment

INSIDER SIGNAL

No active buy signal

1 qualifying P purchase group
in the current 180-day scoring window

12 Form 4 transaction lines observed in the same window
4 sales · 7 option, withholding, award, gift or other lines

Last qualifying purchase2026-08-06 · Santo Timothy P · $50.0K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying1 qualifying line group(s)
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: Santo Timothy P · $50.0K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-08-06–2026-08-06

Roles in the peak window: SVP of Finance; CFO. Concentration uses priced qualifying P lines only and does not change the saved score.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Glingener ChristophChief Technology Officer
○▼○▼○○
Wilson James Denson JrChief Revenue Officer
○▼
Santo Timothy PSVP of Finance; CFO
●
DelSanto AnneDirector
○
● Purchase▼ Sale○ Other

—

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-08-06 · Santo Timothy P.

Recent Form 4 activity

4Purchases
5Sales
30Other Form 4 lines
29SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING4 sale line(s) · context only
OTHER7 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+0.0%
3M
-43.0%
6M
-44.7%
12M
-23.0%

Volatility & liquidity

Volatility
62.2%
Beta
1.49
Avg daily value
USD 14.0M

Valuation

Market cap
USD 582.6M
P/E
—

Fundamentals

Profit margin
-4.2%
ROE
-31.3%
Industry
Communication Equipment

Market data

Price data up to: 2026-10-05 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
11,862,717
Previous report
12,536,823
Avg daily volume
1,646,917
Days to cover
7.2

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-06Santo Timothy PPurchase (P)Common Stock6,579USD 7.60USD 50,000SEC filing ↗
2025-11-28Santo Timothy PPurchase (P)Common Stock6,150USD 8.02USD 49,323SEC filing ↗
2025-11-26Theodosopoulos NikosPurchase (P)Common Stock12,859USD 7.81USD 100,429SEC filing ↗
2025-11-24STANTON THOMAS RPurchase (P)Common Stock40,928USD 7.33USD 300,002SEC filing ↗
2022-12-07STANTON THOMAS RPurchase (P)Common Stock652USD 19.21USD 12,529SEC filing ↗
2022-12-07McCray Gregory JamesPurchase (P)Common Stock36USD 19.21USD 698SEC filing ↗
2022-09-04Wilson James Denson JrPurchase (P)Common Stock102USD 22.90USD 2,343SEC filing ↗
2022-09-04Wilson James Denson JrPurchase (P)Common Stock102USD 22.90USD 2,343SEC filing ↗
2022-09-04STANTON THOMAS RPurchase (P)Common Stock296USD 22.90USD 6,783SEC filing ↗
2022-09-04McCray Gregory JamesPurchase (P)Common Stock30USD 22.90USD 695SEC filing ↗
2022-09-01Foliano MichaelPurchase (P)Common Stock1USD 20.62USD 19SEC filing ↗
2021-11-09Nair BalanPurchase (P)Common Stock4,773USD 20.95USD 99,994SEC filing ↗
2020-02-18Whalen Daniel TPurchase (P)Common Stock6,500USD 8.71USD 56,615SEC filing ↗
2020-02-14Whalen Daniel TPurchase (P)Common Stock13,500USD 8.95USD 120,825SEC filing ↗

Form 4 evidence

39 transaction lines in the latest 365-day window; 464 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-10Glingener ChristophAward / grant (A)Common Stock27,924USD 0.00USD 0SEC filing ↗
2026-08-06Santo Timothy PPurchase (P)Common Stock6,579USD 7.60USD 50,000SEC filing ↗
2026-07-24Glingener ChristophAward / grant (A)Common Stock9,384USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-10Glingener ChristophAward / grant (A)Common Stock27,924USD 0.00USD 0SEC filing ↗
2026-08-06Santo Timothy PPurchase (P)Common Stock6,579USD 7.60USD 50,000SEC filing ↗
2026-07-24Glingener ChristophAward / grant (A)Common Stock9,384USD 0.00USD 0SEC filing ↗
2026-07-01DelSanto AnneAward / grant (A)Common Stock4,399USD 0.00USD 0SEC filing ↗
2026-05-20Wilson James Denson JrSale (S)Common Stock9,332USD 14.72USD 137,367SEC filing ↗
2026-05-20Wilson James Denson JrGift (G)Common Stock10,469USD 0.00USD 0SEC filing ↗
2026-05-08Glingener ChristophSale (S)Common Stock22,277USD 15.00USD 334,155SEC filing ↗
2026-05-08Glingener ChristophOption exercise / conversion (M)Common Stock22,277USD 12.17USD 271,111SEC filing ↗
2026-05-07Glingener ChristophSale (S)Common Stock126,115USD 14.95USD 1,885,689SEC filing ↗
2026-05-07Glingener ChristophOption exercise / conversion (M)Common Stock126,115USD 10.48USD 1,322,124SEC filing ↗
2026-04-01Wilson James Denson JrAward / grant (A)Common Stock24,908USD 0.00USD 0SEC filing ↗
2026-04-01Santo Timothy PAward / grant (A)Common Stock28,252USD 0.00USD 0SEC filing ↗
2026-04-01STANTON THOMAS RAward / grant (A)Common Stock170,723USD 0.00USD 0SEC filing ↗
2026-03-19Santo Timothy PTax withholding (F)Common Stock1,501USD 11.90USD 17,862SEC filing ↗
2026-03-04Jacqueline Hourigan RiceSale (S)Common Stock14,406USD 10.29USD 148,238SEC filing ↗
2026-01-26Wilson James Denson JrTax withholding (F)Common Stock1,309USD 9.24USD 12,095SEC filing ↗
2026-01-26Wilson James Denson JrTax withholding (F)Common Stock1,087USD 9.24USD 10,044SEC filing ↗
2026-01-26Wilson James Denson JrAward / grant (A)Common Stock3,777USD 0.00USD 0SEC filing ↗
2026-01-26STANTON THOMAS RTax withholding (F)Common Stock12,407USD 9.24USD 114,641SEC filing ↗
2026-01-26STANTON THOMAS RAward / grant (A)Common Stock27,973USD 0.00USD 0SEC filing ↗
2026-01-26Wilson James Denson JrTax withholding (F)Common Stock998USD 9.73USD 9,711SEC filing ↗
2026-01-26STANTON THOMAS RTax withholding (F)Common Stock14,409USD 9.73USD 140,200SEC filing ↗
2026-01-24Wilson James Denson JrTax withholding (F)Common Stock1,227USD 9.55USD 11,718SEC filing ↗
2026-01-24STANTON THOMAS RTax withholding (F)Common Stock17,535USD 9.55USD 167,459SEC filing ↗
2026-01-20Wilson James Denson JrTax withholding (F)Common Stock765USD 9.24USD 7,069SEC filing ↗
2026-01-20STANTON THOMAS RTax withholding (F)Common Stock10,247USD 9.24USD 94,682SEC filing ↗
2025-12-31Walker Kathryn AAward / grant (A)Common Stock13,809USD 0.00USD 0SEC filing ↗
2025-12-31Theodosopoulos NikosAward / grant (A)Common Stock13,809USD 0.00USD 0SEC filing ↗
2025-12-31Nair BalanAward / grant (A)Common Stock13,809USD 0.00USD 0SEC filing ↗
2025-12-31McCray Gregory JamesAward / grant (A)Common Stock13,809USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerADTN
CIK0000926282
SectorTechnology
IndustryCommunication Equipment Yahoo Finance
SEC SIC3661 Telephone & Telegraph Apparatus
ExchangeNasdaq

Data coverage

Local Form 4 history464 transaction lines from 2020-01-18 to 2026-08-10
14 P purchase lines · 15 S sale lines · 435 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.