Markel MKL Insider Ownership

NYSE MKL
$1,816.06 +18.78 (+1.04%)
At close: Sep 2, 2026 · 4:00 PM EDT

Insider Holdings by Owner

190.22K Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
—
share count not reported for this filer set
Shares Held by Insiders
56.74K
filed for Sep 2026
■0.00% QoQ
Shares Outstanding
—
not reported
Direct Holdings
56.74K
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
24
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

MKL's three largest insider shareholders as of August 29, 2026 are Steven A Markel (Vice Chairman, 60.37K shares), Thomas Sinnickson Gayner (Chief Executive Officer, 56.74K shares), Anthony F Markel (Vice Chairman, 36.26K shares).

Form 4 Holdings

Insiders Holding MKL

Insiders 24
Shares held 190.22K
Of outstanding —
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Steven A Markel Vice Chairman 60,368 0 60,368 31.7% 15 Dec, 2025
2 Thomas Sinnickson Gayner Chief Executive Officer 56,741 0 56,741 29.8% 26 Feb, 2026
3 Anthony F Markel Vice Chairman 15,000 0 15,000 7.9% 25 Feb, 2025
4 Richard R Iii Whitt Co Chief Executive Officer 11,360 0 11,360 6.0% 07 Dec, 2022
5 Bradley James Kiscaden Pres/Chief Admin Off Ins Ops 8,090 0 8,090 4.3% 17 Feb, 2022
6 Jeremy Andrew Noble President, Insurance 4,888 0 4,888 2.6% 20 Feb, 2025
7 Michael R Heaton Evp Chief Operating Officer 4,709 0 4,709 2.5% 03 Dec, 2025
8 Richard Randolph Grinnan Svp, Chief Legal Officer Sec 4,147 0 4,147 2.2% 19 May, 2026
9 Michael Oreilly Director 3,935 0 3,935 2.1% 17 Jun, 2026
10 K Bruce Connell Director 2,762 0 2,762 1.5% 18 May, 2023
11 Andrew G. Crowley Evp Pres., Markel Ventures 2,749 0 2,749 1.4% 16 Jul, 2026
12 Simon Wilson Evp And Ceo, Markel Insurance 2,397 0 2,397 1.3% 26 Feb, 2026
13 Robert C Cox Pres. Coo, Insur. Operations 2,346 0 2,346 1.2% 07 Dec, 2022
14 Diane Leopold Director 2,345 0 2,345 1.2% 17 Jun, 2026
15 Brian J. Costanzo Chief Financial Officer 1,632 0 1,632 0.9% 16 Jul, 2026
16 Harold Lawrence Jr. Morrison Director 1,127 0 1,127 0.6% 17 Jun, 2026
17 Mark Besca Director 1,052 0 1,052 0.6% 23 May, 2025
18 Morgan E. Housel Director 1,029 0 1,029 0.5% 17 Jun, 2026
19 Lawrence A Cunningham Director 920 0 920 0.5% 17 Jun, 2025
20 Susan L. Davies Chro, Markel Insurance 848 0 848 0.4% 16 Dec, 2022
21 Greta J Harris Director 645 0 645 0.3% 27 May, 2026
22 A. Lynne Puckett Director 507 0 507 0.3% 17 Jun, 2026
23 Jonathan E Michael Director 333 0 333 0.2% 17 Jun, 2026
24 Meade P. Grandis Cao And Controller 294 0 294 0.2% 26 Feb, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,040 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
30 Jun, 2026 Brian J. Costanzo Chief Financial Officer Acquired J 2 $1,617.19 $3.50K 1,632 Direct
30 Jun, 2026 Andrew G. Crowley Evp Pres., Markel Ventures Acquired J 3 $1,617.19 $4.55K 2,741 Direct
15 Jul, 2026 Andrew G. Crowley Evp Pres., Markel Ventures Acquired J 7 $1,730.49 $12.94K 2,749 Direct
15 Jun, 2026 Jonathan E Michael Director Acquired J 66 $1,668.65 $110.00K 333 Direct
15 Jun, 2026 Diane Leopold Director Acquired J 66 $1,668.65 $110.00K 2,345 Direct
15 Jun, 2026 Michael Oreilly Director Acquired J 90 $1,668.65 $150.00K 3,935 Direct
15 Jun, 2026 Morgan E. Housel Director Acquired J 66 $1,668.65 $110.00K 1,029 Direct
15 Jun, 2026 A. Lynne Puckett Director Acquired J 66 $1,668.65 $110.00K 507 Direct
15 Jun, 2026 Harold Lawrence Jr. Morrison Director Acquired J 33 $1,668.65 $55.00K 1,127 Direct
22 May, 2026 Greta J Harris Director Disposed S 35 $1,846.12 $64.61K 686 Direct
22 May, 2026 Greta J Harris Director Disposed S 14 $1,847.36 $25.86K 672 Direct
22 May, 2026 Greta J Harris Director Disposed S 27 $1,848.83 $49.92K 645 Direct
20 May, 2026 Morgan E. Housel Director Acquired A 89 $0.00 $0 963 Direct
20 May, 2026 Greta J Harris Director Acquired A 89 $0.00 $0 721 Direct
20 May, 2026 Michael Oreilly Director Acquired A 89 $0.00 $0 3,845 Direct
20 May, 2026 A. Lynne Puckett Director Acquired A 89 $0.00 $0 441 Direct
20 May, 2026 Jonathan E Michael Director Acquired A 89 $0.00 $0 267 Direct
20 May, 2026 Diane Leopold Director Acquired A 89 $0.00 $0 2,279 Direct
15 May, 2026 Richard Randolph Grinnan Svp, Chief Legal Officer Sec Disposed F 116 $1,844.00 $214.56K 4,147 Direct
15 May, 2026 Brian J. Costanzo Chief Financial Officer Disposed F 13 $1,844.00 $24.12K 1,600 Direct