Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

GRIFFON CORP

GFF · NYSE · CIK 0000050725 · Industrials · Building Products & Equipment

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

47 Form 4 transaction lines observed in the same window
47 sales · 0 option, withholding, award, gift or other lines

Last qualifying purchase2026-03-05 · ALPERT HENRY A · $80.0K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
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.

Insider activity timeline

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

AprMayJunJulAugSepOct
MEHMEL ROBERT FPresident and COO
▼▼▼▼▼▼▼▼▼▼▼▼▼
Harris Brian GEVP, Chief Financial Officer
▼▼▼▼
KRAMER RONALD JChairman of the Board and CEO
▼▼
TURNBULL CHERYL LDirector
▼
Sullivan Kevin FDirector
▼
● Purchase▼ Sale○ Other

—

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

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: 2026-03-05 · ALPERT HENRY A.

Recent Form 4 activity

1Purchases
55Sales
21Other Form 4 lines
42SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING47 sale line(s) · context only
OTHER0 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 has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

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

Shares short
1,453,076
Previous report
1,782,506
Avg daily volume
399,619
Days to cover
3.6

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
2026-03-05ALPERT HENRY APurchase (P)Common Stock1,000USD 79.99USD 79,990SEC filing ↗
2021-12-22Johnson Lacy M.Purchase (P)Common Stock2,500USD 28.04USD 70,100SEC filing ↗
2021-12-21Sullivan Kevin FPurchase (P)Common Stock3,500USD 26.24USD 91,840SEC filing ↗
2021-12-21Coben Jerome LPurchase (P)Common Stock2,000USD 26.41USD 52,820SEC filing ↗
2021-12-21ALPERT HENRY APurchase (P)Common Stock3,000USD 26.40USD 79,200SEC filing ↗
2021-12-21Grabowsky Louis J.Purchase (P)Common Stock5,900USD 25.63USD 151,217SEC filing ↗
2021-12-21BROSIG THOMASPurchase (P)Common Stock1,922USD 25.96USD 49,895SEC filing ↗
2020-12-04ALPERT HENRY APurchase (P)Common Stock5,000USD 20.02USD 100,100SEC filing ↗
2020-11-16Coben Jerome LPurchase (P)Common Stock1,000USD 19.95USD 19,950SEC filing ↗
2020-03-27BROSIG THOMASPurchase (P)Common Stock4,075USD 12.02USD 48,982SEC filing ↗
2020-03-26Sullivan Kevin FPurchase (P)Common Stock8,500USD 11.60USD 98,600SEC filing ↗
2020-02-06Sullivan Kevin FPurchase (P)Common Stock5,000USD 19.82USD 99,100SEC filing ↗

Form 4 evidence

77 transaction lines in the latest 365-day window; 364 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-13TURNBULL CHERYL LSale (S)Common Stock3,000USD 106.12USD 318,360SEC filing ↗
2026-08-13Sullivan Kevin FSale (S)Common Stock3,500USD 105.59USD 369,565SEC filing ↗
2026-08-11MEHMEL ROBERT FSale (S)Common Stock3,240USD 107.16USD 347,198SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-13TURNBULL CHERYL LSale (S)Common Stock3,000USD 106.12USD 318,360SEC filing ↗
2026-08-13Sullivan Kevin FSale (S)Common Stock3,500USD 105.59USD 369,565SEC filing ↗
2026-08-11MEHMEL ROBERT FSale (S)Common Stock3,240USD 107.16USD 347,198SEC filing ↗
2026-08-10MEHMEL ROBERT FSale (S)Common Stock6,639USD 104.34USD 692,718SEC filing ↗
2026-08-07MEHMEL ROBERT FSale (S)Common Stock15,928USD 107.35USD 1,709,924SEC filing ↗
2026-08-07Harris Brian GSale (S)Common Stock5,267USD 107.11USD 564,148SEC filing ↗
2026-08-06MEHMEL ROBERT FSale (S)Common Stock14,852USD 105.18USD 1,562,092SEC filing ↗
2026-08-05MEHMEL ROBERT FSale (S)Common Stock22,209USD 102.08USD 2,267,121SEC filing ↗
2026-08-05KRAMER RONALD JSale (S)Common Stock100,000USD 102.42USD 10,241,980SEC filing ↗
2026-08-05Harris Brian GSale (S)Common Stock11,050USD 103.27USD 1,141,111SEC filing ↗
2026-06-30MEHMEL ROBERT FSale (S)Common Stock4,166USD 97.76USD 407,268SEC filing ↗
2026-06-30Harris Brian GSale (S)Common Stock6,183USD 98.01USD 605,996SEC filing ↗
2026-06-26MEHMEL ROBERT FSale (S)Common Stock286USD 95.66USD 27,359SEC filing ↗
2026-06-25MEHMEL ROBERT FSale (S)Common Stock7,873USD 96.02USD 755,992SEC filing ↗
2026-06-24MEHMEL ROBERT FSale (S)Common Stock4,726USD 95.46USD 451,155SEC filing ↗
2026-06-17MEHMEL ROBERT FSale (S)Common Stock547USD 95.37USD 52,167SEC filing ↗
2026-06-16MEHMEL ROBERT FSale (S)Common Stock3,018USD 95.39USD 287,883SEC filing ↗
2026-06-15MEHMEL ROBERT FSale (S)Common Stock3,272USD 95.40USD 312,149SEC filing ↗
2026-06-12MEHMEL ROBERT FSale (S)Common Stock5,501USD 95.18USD 523,585SEC filing ↗
2026-06-12KRAMER RONALD JSale (S)Common Stock100,000USD 94.92USD 9,492,107SEC filing ↗
2026-06-11Harris Brian GSale (S)Common Stock7,500USD 95.03USD 712,725SEC filing ↗
2026-03-05ALPERT HENRY APurchase (P)Common Stock1,000USD 79.99USD 79,990SEC filing ↗
2026-02-18Taylor Michelle LAward / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18TURNBULL CHERYL LAward / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18Sullivan Kevin FAward / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18SIGHT JAMES WAward / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18Johnson Lacy M.Award / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18Hegedus SamantaAward / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18Grabowsky Louis J.Award / grant (A)Common Stock1,340USD 0.00USD 0SEC filing ↗
2026-02-18Diao H.C. CharlesAward / grant (A)Common Stock1,340USD 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 date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerGFF
CIK0000050725
SectorIndustrials
IndustryBuilding Products & Equipment Yahoo Finance
SEC SIC3442 Metal Doors, Sash, Frames, Moldings & Trim
ExchangeNYSE

Data coverage

Local Form 4 history364 transaction lines from 2020-01-29 to 2026-08-13
12 P purchase lines · 137 S sale lines · 215 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.