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W. R. Berkley Corporation

WRB Net buying
CIK 0000011544 #477 in the set updated 17 Sep 2026
Bought (12 mo)
$705.46M
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$0.00
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$0.00
0 of 0 sales
Net
+$705.46M
+$705.46M against sales at will

By person

15 insiders · 94 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
MITSUI SUMITOMO INSURANCE CO LTD entity
10% owner
$705.46M (94)
+$705.46M
58,780,450
15.83%
$4.26B
+20.9%
BERKLEY WILLIAM R
Executive Chairman
17,366,375
4.68%
$1.26B
+0.7%
BERKLEY WILLIAM R JR
Chairman, President and CEO
4,650,314
1.25%
$337.26M
+4.7%
SHIEL JAMES G
EVP - Investments
810,633
0.2184%
$58.79M
−18.3%
Sgaglione Lucille T
EVP
241,036
0.0649%
$17.48M
+6.8%
Baio Richard Mark
EVP & CFO
227,611
0.0613%
$16.51M
+14.5%
Welt Philip S
EVP & Secretary
214,033
0.0577%
$15.52M
+15.6%
BLAYLOCK RONALD E
Director
121,990
0.0329%
$8.85M
+5.1%
Augostini Christopher L
Director
109,859
0.0296%
$7.97M
+5.6%
Ferre Maria Luisa
Director
59,234
0.0160%
$4.30M
+11.0%
Talisman Jonathan
Director
33,180
0.0089%
$2.41M
+21.5%
Farrell Mary C
Director
19,378
0.0052%
$1.41M
+43.4%
Mosley Daniel Lynn
Director
14,885
0.0040%
$1.08M
+65.0%
Mattson Marie Angela
Director
9,667
0.0026%
$701.09K
+154.3%
Rusbuldt Robert Alan
Director
5,866
0.0016%
$425.42K
Insider
Date
Role
Action
Shares
Price
Amount
MITSUI SUMITOMO INSURANCE CO LTD
3 Mar 2026
10% owner
Buy
73,185
$72.52
$5.31M
MITSUI SUMITOMO INSURANCE CO LTD
3 Mar 2026
10% owner
Buy
38,991
$71.60
$2.79M
MITSUI SUMITOMO INSURANCE CO LTD
2 Mar 2026
10% owner
Buy
100,897
$73.20
$7.39M
MITSUI SUMITOMO INSURANCE CO LTD
2 Mar 2026
10% owner
Buy
45,103
$72.29
$3.26M
MITSUI SUMITOMO INSURANCE CO LTD
27 Feb 2026
10% owner
Buy
147,000
$71.63
$10.53M
MITSUI SUMITOMO INSURANCE CO LTD
26 Feb 2026
10% owner
Buy
7,509
$72.11
$541.50K
MITSUI SUMITOMO INSURANCE CO LTD
26 Feb 2026
10% owner
Buy
145,491
$71.65
$10.42M
MITSUI SUMITOMO INSURANCE CO LTD
25 Feb 2026
10% owner
Buy
14,356
$71.77
$1.03M
MITSUI SUMITOMO INSURANCE CO LTD
25 Feb 2026
10% owner
Buy
154,512
$71.39
$11.03M
MITSUI SUMITOMO INSURANCE CO LTD
24 Feb 2026
10% owner
Buy
61,594
$71.28
$4.39M
MITSUI SUMITOMO INSURANCE CO LTD
24 Feb 2026
10% owner
Buy
103,192
$70.52
$7.28M
MITSUI SUMITOMO INSURANCE CO LTD
23 Feb 2026
10% owner
Buy
16,410
$71.80
$1.18M
MITSUI SUMITOMO INSURANCE CO LTD
23 Feb 2026
10% owner
Buy
203,590
$71.09
$14.47M
MITSUI SUMITOMO INSURANCE CO LTD
20 Feb 2026
10% owner
Buy
160,582
$70.80
$11.37M
MITSUI SUMITOMO INSURANCE CO LTD
19 Feb 2026
10% owner
Buy
44,014
$71.50
$3.15M
MITSUI SUMITOMO INSURANCE CO LTD
19 Feb 2026
10% owner
Buy
300,986
$70.53
$21.23M
MITSUI SUMITOMO INSURANCE CO LTD
18 Feb 2026
10% owner
Buy
45,250
$70.96
$3.21M
MITSUI SUMITOMO INSURANCE CO LTD
18 Feb 2026
10% owner
Buy
239,750
$70.58
$16.92M
MITSUI SUMITOMO INSURANCE CO LTD
17 Feb 2026
10% owner
Buy
281,386
$71.19
$20.03M
MITSUI SUMITOMO INSURANCE CO LTD
13 Feb 2026
10% owner
Buy
280
$71.18
$19.93K
MITSUI SUMITOMO INSURANCE CO LTD
13 Feb 2026
10% owner
Buy
4,314
$70.30
$303.26K
MITSUI SUMITOMO INSURANCE CO LTD
13 Feb 2026
10% owner
Buy
15,406
$69.73
$1.07M
MITSUI SUMITOMO INSURANCE CO LTD
12 Feb 2026
10% owner
Buy
2,401
$72.76
$174.69K
MITSUI SUMITOMO INSURANCE CO LTD
12 Feb 2026
10% owner
Buy
17,599
$71.88
$1.27M
MITSUI SUMITOMO INSURANCE CO LTD
11 Feb 2026
10% owner
Buy
11,163
$71.45
$797.59K
MITSUI SUMITOMO INSURANCE CO LTD
11 Feb 2026
10% owner
Buy
3,578
$70.50
$252.27K
MITSUI SUMITOMO INSURANCE CO LTD
11 Feb 2026
10% owner
Buy
9,289
$69.59
$646.40K
MITSUI SUMITOMO INSURANCE CO LTD
10 Feb 2026
10% owner
Buy
12,082
$69.92
$844.79K
MITSUI SUMITOMO INSURANCE CO LTD
10 Feb 2026
10% owner
Buy
21,884
$69.09
$1.51M
MITSUI SUMITOMO INSURANCE CO LTD
9 Feb 2026
10% owner
Buy
4,048
$70.32
$284.65K
MITSUI SUMITOMO INSURANCE CO LTD
9 Feb 2026
10% owner
Buy
35,952
$69.27
$2.49M
MITSUI SUMITOMO INSURANCE CO LTD
6 Feb 2026
10% owner
Buy
4,306
$71.39
$307.41K
MITSUI SUMITOMO INSURANCE CO LTD
6 Feb 2026
10% owner
Buy
15,694
$70.46
$1.11M
MITSUI SUMITOMO INSURANCE CO LTD
5 Feb 2026
10% owner
Buy
13,472
$71.25
$959.92K
MITSUI SUMITOMO INSURANCE CO LTD
5 Feb 2026
10% owner
Buy
6,528
$70.79
$462.11K
MITSUI SUMITOMO INSURANCE CO LTD
4 Feb 2026
10% owner
Buy
22,415
$70.25
$1.57M
MITSUI SUMITOMO INSURANCE CO LTD
4 Feb 2026
10% owner
Buy
2,585
$69.77
$180.34K
MITSUI SUMITOMO INSURANCE CO LTD
3 Feb 2026
10% owner
Buy
31,653
$68.87
$2.18M
MITSUI SUMITOMO INSURANCE CO LTD
3 Feb 2026
10% owner
Buy
8,347
$67.75
$565.50K
MITSUI SUMITOMO INSURANCE CO LTD
2 Feb 2026
10% owner
Buy
13,159
$68.42
$900.30K
MITSUI SUMITOMO INSURANCE CO LTD
2 Feb 2026
10% owner
Buy
237,062
$67.71
$16.05M
MITSUI SUMITOMO INSURANCE CO LTD
30 Jan 2026
10% owner
Buy
195,000
$68.36
$13.33M
MITSUI SUMITOMO INSURANCE CO LTD
29 Jan 2026
10% owner
Buy
27,718
$68.56
$1.90M
MITSUI SUMITOMO INSURANCE CO LTD
29 Jan 2026
10% owner
Buy
262,282
$68.08
$17.86M
MITSUI SUMITOMO INSURANCE CO LTD
28 Jan 2026
10% owner
Buy
28,577
$67.89
$1.94M
MITSUI SUMITOMO INSURANCE CO LTD
28 Jan 2026
10% owner
Buy
280,354
$67.58
$18.95M
MITSUI SUMITOMO INSURANCE CO LTD
27 Jan 2026
10% owner
Buy
2,671
$69.04
$184.39K
MITSUI SUMITOMO INSURANCE CO LTD
27 Jan 2026
10% owner
Buy
8,582
$68.56
$588.39K
MITSUI SUMITOMO INSURANCE CO LTD
27 Jan 2026
10% owner
Buy
325,960
$67.40
$21.97M
MITSUI SUMITOMO INSURANCE CO LTD
27 Jan 2026
10% owner
Buy
11,987
$66.87
$801.52K
MITSUI SUMITOMO INSURANCE CO LTD
27 Jan 2026
10% owner
Buy
800
$65.86
$52.69K
MITSUI SUMITOMO INSURANCE CO LTD
26 Jan 2026
10% owner
Buy
76,389
$67.88
$5.19M
MITSUI SUMITOMO INSURANCE CO LTD
26 Jan 2026
10% owner
Buy
293,611
$66.86
$19.63M
MITSUI SUMITOMO INSURANCE CO LTD
23 Jan 2026
10% owner
Buy
166,919
$67.18
$11.21M
MITSUI SUMITOMO INSURANCE CO LTD
23 Jan 2026
10% owner
Buy
201,081
$66.77
$13.43M
MITSUI SUMITOMO INSURANCE CO LTD
22 Jan 2026
10% owner
Buy
330,000
$67.45
$22.26M
MITSUI SUMITOMO INSURANCE CO LTD
21 Jan 2026
10% owner
Buy
260,998
$67.60
$17.64M
MITSUI SUMITOMO INSURANCE CO LTD
21 Jan 2026
10% owner
Buy
59,002
$66.95
$3.95M
MITSUI SUMITOMO INSURANCE CO LTD
20 Jan 2026
10% owner
Buy
44,994
$68.08
$3.06M
MITSUI SUMITOMO INSURANCE CO LTD
20 Jan 2026
10% owner
Buy
265,006
$67.75
$17.95M
MITSUI SUMITOMO INSURANCE CO LTD
16 Jan 2026
10% owner
Buy
58,691
$68.79
$4.04M
MITSUI SUMITOMO INSURANCE CO LTD
16 Jan 2026
10% owner
Buy
241,309
$68.03
$16.42M
MITSUI SUMITOMO INSURANCE CO LTD
15 Jan 2026
10% owner
Buy
68,093
$69.45
$4.73M
MITSUI SUMITOMO INSURANCE CO LTD
15 Jan 2026
10% owner
Buy
166,907
$68.68
$11.46M
MITSUI SUMITOMO INSURANCE CO LTD
14 Jan 2026
10% owner
Buy
208,272
$69.23
$14.42M
MITSUI SUMITOMO INSURANCE CO LTD
14 Jan 2026
10% owner
Buy
21,728
$68.80
$1.49M
MITSUI SUMITOMO INSURANCE CO LTD
13 Jan 2026
10% owner
Buy
206,499
$68.15
$14.07M
MITSUI SUMITOMO INSURANCE CO LTD
13 Jan 2026
10% owner
Buy
118,501
$67.82
$8.04M
MITSUI SUMITOMO INSURANCE CO LTD
12 Jan 2026
10% owner
Buy
256,041
$68.73
$17.60M
MITSUI SUMITOMO INSURANCE CO LTD
9 Jan 2026
10% owner
Buy
8,150
$70.12
$571.45K
MITSUI SUMITOMO INSURANCE CO LTD
9 Jan 2026
10% owner
Buy
105,674
$69.56
$7.35M
MITSUI SUMITOMO INSURANCE CO LTD
9 Jan 2026
10% owner
Buy
161,176
$68.48
$11.04M
MITSUI SUMITOMO INSURANCE CO LTD
8 Jan 2026
10% owner
Buy
151,511
$70.32
$10.65M
MITSUI SUMITOMO INSURANCE CO LTD
8 Jan 2026
10% owner
Buy
39,302
$69.69
$2.74M
MITSUI SUMITOMO INSURANCE CO LTD
8 Jan 2026
10% owner
Buy
4,187
$68.79
$288.03K
MITSUI SUMITOMO INSURANCE CO LTD
7 Jan 2026
10% owner
Buy
10,378
$69.20
$718.20K
MITSUI SUMITOMO INSURANCE CO LTD
7 Jan 2026
10% owner
Buy
254,622
$68.47
$17.43M
MITSUI SUMITOMO INSURANCE CO LTD
6 Jan 2026
10% owner
Buy
92,357
$70.21
$6.48M
MITSUI SUMITOMO INSURANCE CO LTD
6 Jan 2026
10% owner
Buy
122,931
$69.93
$8.60M
MITSUI SUMITOMO INSURANCE CO LTD
5 Jan 2026
10% owner
Buy
153,686
$70.78
$10.88M
MITSUI SUMITOMO INSURANCE CO LTD
5 Jan 2026
10% owner
Buy
35,894
$70.23
$2.52M
MITSUI SUMITOMO INSURANCE CO LTD
5 Jan 2026
10% owner
Buy
11,350
$69.20
$785.42K
MITSUI SUMITOMO INSURANCE CO LTD
2 Jan 2026
10% owner
Buy
237,734
$69.35
$16.49M
MITSUI SUMITOMO INSURANCE CO LTD
31 Dec 2025
10% owner
Buy
230,000
$70.27
$16.16M
MITSUI SUMITOMO INSURANCE CO LTD
30 Dec 2025
10% owner
Buy
205,000
$70.83
$14.52M
MITSUI SUMITOMO INSURANCE CO LTD
29 Dec 2025
10% owner
Buy
205,000
$70.77
$14.51M
MITSUI SUMITOMO INSURANCE CO LTD
26 Dec 2025
10% owner
Buy
220,000
$70.56
$15.52M
MITSUI SUMITOMO INSURANCE CO LTD
24 Dec 2025
10% owner
Buy
220,000
$70.51
$15.51M
MITSUI SUMITOMO INSURANCE CO LTD
23 Dec 2025
10% owner
Buy
2,027
$71.15
$144.23K
MITSUI SUMITOMO INSURANCE CO LTD
23 Dec 2025
10% owner
Buy
232,546
$70.31
$16.35M
MITSUI SUMITOMO INSURANCE CO LTD
22 Dec 2025
10% owner
Buy
162,060
$70.33
$11.40M
MITSUI SUMITOMO INSURANCE CO LTD
22 Dec 2025
10% owner
Buy
39,940
$69.97
$2.79M
MITSUI SUMITOMO INSURANCE CO LTD
19 Dec 2025
10% owner
Buy
204,000
$69.50
$14.18M
MITSUI SUMITOMO INSURANCE CO LTD
18 Dec 2025
10% owner
Buy
204,350
$69.38
$14.18M

What was left out

Form 4 filings counted 35
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 20
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 0
Transactions with no price 0
Shares from compensation/vesting 179,032
History held since 1 Sep 2016