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

MARKEL GROUP INC.

MKL · NYSE · CIK 0001096343 · Financial Services · Insurance—Property & Casualty

INSIDER SIGNAL

51.8 / 100

2 buyers · 3 purchase transaction lines · $371.1K gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeLow
RoleStrong
RecencyLow
ConvictionModerate
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+14.0 / 35
Purchase size+10.9 / 25
Role+20.0 / 20
Recency+0.7 / 10
Conviction+6.2 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 2 insider(s), not 4+
  • ⚠ Purchase size is modest relative to the model scale
  • ⚠ Purchase activity is becoming less recent
  • ⚠ Buying conviction is reduced by concurrent selling
  • ✓ Role scores high · most senior buyer: Director

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

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

AprMayJunJulAugSepOct
Crowley Andrew G.EVP & Pres., Markel Ventures
○○○○
Costanzo Brian J.Chief Financial Officer
○○○○
Leopold DianeDirector
●●○○
Puckett A. LynneDirector
●○○
OREILLY MICHAELDirector
○○
Morrison Harold Lawrence Jr.Director
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 7 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS2
PURCHASE CONCENTRATION72%Largest buyer: Leopold Diane · $268.7K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-05-01–2026-05-07

Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

51.8 / 100

Latest recorded score

→ +0.0 ptsversus the previous recorded snapshot
  1. 52.0
  2. 52.0
  3. 51.8
  4. 51.8
  5. 51.8

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

3Purchases
23Sales
42Other Form 4 lines
45SEC filings · 365 days
BUYING3 qualifying P line(s) · 180 days
SELLING3 sale line(s) · context only
OTHER27 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot detected in parsed evidence

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
-1.2%
3M
-10.3%
6M
-8.5%
12M
-10.0%

Volatility & liquidity

Volatility
21.8%
Beta
—
Avg daily value
USD 120.3M

Valuation

Market cap
USD 21.8B
P/E
10.4×

Fundamentals

Profit margin
13.6%
ROE
11.3%
Industry
Insurance—Property & Casualty

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, Profit margin, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-07-22 · Status: PASS

Short interest

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

Shares short
276,782
Previous report
278,703
Avg daily volume
79,620
Days to cover
3.5

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
2026-05-07Leopold DianePurchase (P)Common Stock50USD 1,789.19USD 89,460SEC filing ↗
2026-05-06Leopold DianePurchase (P)Common Stock100USD 1,792.61USD 179,261SEC filing ↗
2026-05-01Puckett A. LynnePurchase (P)Common Stock57USD 1,795.53USD 102,345SEC filing ↗
2025-05-22Cunningham Lawrence APurchase (P)Common Stock25USD 1,851.32USD 46,283SEC filing ↗
2025-02-07GAYNER THOMAS SINNICKSONPurchase (P)Common Stock100USD 2,008.01USD 200,801SEC filing ↗
2024-11-01GAYNER THOMAS SINNICKSONPurchase (P)Common Stock100USD 1,549.72USD 154,972SEC filing ↗
2024-08-05Cunningham Lawrence APurchase (P)Common Stock20USD 1,512.50USD 30,250SEC filing ↗
2024-08-02Cunningham Lawrence APurchase (P)Common Stock10USD 1,550.00USD 15,500SEC filing ↗
2024-02-02Puckett A. LynnePurchase (P)Common Stock72USD 1,409.28USD 101,468SEC filing ↗
2024-02-02Cunningham Lawrence APurchase (P)Common Stock30USD 1,407.76USD 42,233SEC filing ↗
2024-02-02GAYNER THOMAS SINNICKSONPurchase (P)Common Stock100USD 1,414.74USD 141,474SEC filing ↗
2023-11-08Cunningham Lawrence APurchase (P)Common Stock21USD 1,320.81USD 27,737SEC filing ↗
2023-11-03Puckett A. LynnePurchase (P)Common Stock76USD 1,321.47USD 100,432SEC filing ↗
2023-11-03GAYNER THOMAS SINNICKSONPurchase (P)Common Stock100USD 1,311.92USD 131,192SEC filing ↗
2023-11-03Besca MarkPurchase (P)Common Stock50USD 1,316.90USD 65,845SEC filing ↗

Form 4 evidence

68 transaction lines in the latest 365-day window; 677 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Costanzo Brian J.J (J)Common Stock2USD 1,455.58USD 3,000SEC filing ↗
2026-07-15Crowley Andrew G.J (J)Common Stock7USD 1,730.49USD 12,944SEC filing ↗
2026-06-30Crowley Andrew G.J (J)Common Stock3USD 1,617.19USD 4,560SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Costanzo Brian J.J (J)Common Stock2USD 1,455.58USD 3,000SEC filing ↗
2026-07-15Crowley Andrew G.J (J)Common Stock7USD 1,730.49USD 12,944SEC filing ↗
2026-06-30Crowley Andrew G.J (J)Common Stock3USD 1,617.19USD 4,560SEC filing ↗
2026-06-30Costanzo Brian J.J (J)Common Stock2USD 1,617.19USD 3,493SEC filing ↗
2026-06-15Puckett A. LynneJ (J)Common Stock66USD 1,668.65USD 109,997SEC filing ↗
2026-06-15OREILLY MICHAELJ (J)Common Stock90USD 1,668.65USD 149,995SEC filing ↗
2026-06-15Morrison Harold Lawrence Jr.J (J)Common Stock33USD 1,668.65USD 54,999SEC filing ↗
2026-06-15MICHAEL JONATHAN EJ (J)Common Stock66USD 1,668.65USD 109,997SEC filing ↗
2026-06-15Leopold DianeJ (J)Common Stock66USD 1,668.65USD 109,997SEC filing ↗
2026-06-15Housel Morgan E.J (J)Common Stock66USD 1,668.65USD 109,997SEC filing ↗
2026-06-15Cunningham Lawrence AJ (J)Common Stock33USD 1,668.65USD 54,999SEC filing ↗
2026-06-15Besca MarkJ (J)Common Stock81USD 1,668.65USD 134,994SEC filing ↗
2026-05-22Harris Greta JSale (S)Common Stock76USD 1,847.31USD 140,396SEC filing ↗
2026-05-20Puckett A. LynneAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20OREILLY MICHAELAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20Morrison Harold Lawrence Jr.Award / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20MICHAEL JONATHAN EAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20Leopold DianeAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20Housel Morgan E.Award / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20Harris Greta JAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20Cunningham Lawrence AAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-20Besca MarkAward / grant (A)Common Stock89USD 0.00USD 0SEC filing ↗
2026-05-15Grinnan Richard RandolphTax withholding (F)Common Stock116USD 1,844.00USD 214,568SEC filing ↗
2026-05-15GAYNER THOMAS SINNICKSONTax withholding (F)Common Stock482USD 1,844.00USD 888,199SEC filing ↗
2026-05-15Crowley Andrew G.J (J)Common Stock60USD 1,659.60USD 100,007SEC filing ↗
2026-05-15Crowley Andrew G.Tax withholding (F)Common Stock75USD 1,844.00USD 138,060SEC filing ↗
2026-05-15Costanzo Brian J.J (J)Common Stock30USD 1,659.60USD 50,004SEC filing ↗
2026-05-15Costanzo Brian J.Tax withholding (F)Common Stock13USD 1,844.00USD 24,120SEC filing ↗
2026-05-07Leopold DianePurchase (P)Common Stock50USD 1,789.19USD 89,460SEC filing ↗
2026-05-06Leopold DianePurchase (P)Common Stock100USD 1,792.61USD 179,261SEC 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 · —
TickerMKL
CIK0001096343
SectorFinancial Services
IndustryInsurance—Property & Casualty Yahoo Finance
SEC SIC6331 Fire, Marine & Casualty Insurance
ExchangeNYSE

Data coverage

Local Form 4 history677 transaction lines from 2020-01-02 to 2026-09-30
50 P purchase lines · 269 S sale lines · 358 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.