Position in BRK-B
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$195,237,165
-$7,308,215 QoQ
Shares Held
390,170
-7.7% QoQ
Ownership
0.028%
of shares outstanding
% of Portfolio
0.24%
of 13F equity value
Holder Rank
#231
of 4,969 holders
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 0%
Shared 100%
None 0%
Common Shares in BRK-B Over Time
Shares Held
Position Value (USD)
Derivatives in BRK-B
reported options exposure · as of Jun 30, 2026CallValue
$1,651,287
CallShares
3,300
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Insurance - Diversified
Financial Services · as of Jun 30, 2026MARSHALL WACE, LLP holds $312,050,713 across 6 Insurance - Diversified names. BRK-B ranks #1 (62.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BRK-B |
Berkshire Hathaway Inc
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|
390,170 | $195,237,165 | |
| 2 | HIG |
Hartford Insurance Group, Inc.
|
412,473 | $54,660,920 | |
| 3 | AIG |
American International Group, Inc.
|
724,793 | $54,018,820 | |
| 4 | AEG |
Aegon Ltd.
|
815,153 | $6,879,890 | |
| 5 | XZO |
Exzeo Group, Inc.
|
40,872 | $689,510 | |
| 6 | PLGO |
Pelagos Insurance Capital Ltd
|
23,179 | $564,408 |
All Filings in BRK-B
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $195,237,165 | 390,170 | Shares | Other | 2026-08-13 | |
| 2026-06-30 | $1,651,287 | 3,300 | Call | Other | 2026-08-13 | |
| 2026-03-31 | $3,162,720 | 6,600 | Call | Other | 2026-05-15 | |
| 2026-03-31 | $143,760 | 300 | Put | Other | 2026-05-15 | |
| 2026-03-31 | $202,545,380 | 422,674 | Shares | Other | 2026-05-15 | |
| 2025-12-31 | $201,060 | 400 | Call | Other | 2026-02-13 | |
| 2025-12-31 | $176,460,811 | 351,061 | Shares | Other | 2026-02-13 | |
| 2025-12-31 | $150,795 | 300 | Put | Other | 2026-02-13 | |
| 2025-09-30 | $251,370 | 500 | Call | Other | 2025-11-13 | |
| 2025-09-30 | $26,946,864 | 53,600 | Put | Other | 2025-11-13 | |
| 2025-09-30 | $161,572,088 | 321,383 | Shares | Other | 2025-11-13 | |
| 2025-06-30 | $114,220,071 | 235,132 | Shares | Other | 2025-08-13 | |
| 2025-06-30 | $194,308 | 400 | Put | Other | 2025-08-13 | |
| 2025-06-30 | $1,797,349 | 3,700 | Call | Other | 2025-08-13 | |
| 2025-03-31 | $372,806 | 700 | Call | Other | 2025-05-15 | |
| 2025-03-31 | $15,459,730 | 29,028 | Shares | Other | 2025-05-15 | |
| 2024-12-31 | $4,759,440 | 10,500 | Call | Other | 2025-02-13 | |
| 2024-12-31 | $181,312 | 400 | Shares | Other | 2025-02-13 | |
| 2024-09-30 | $11,644,578 | 25,300 | Call | Other | 2024-11-14 | |
| 2024-09-30 | $7,870,446 | 17,100 | Put | Other | 2024-11-14 | |
| 2024-09-30 | $322,182 | 700 | Shares | Other | 2024-11-14 | |
| 2024-06-30 | $11,837,880 | 29,100 | Call | Other | 2024-08-14 | |
| 2024-06-30 | $11,675,160 | 28,700 | Put | Other | 2024-08-14 | |
| 2024-06-30 | $132,678,633 | 326,152 | Shares | Other | 2024-08-14 | |
| 2024-03-31 | $19,974,700 | 47,500 | Call | Other | 2024-05-15 | |
| 2024-03-31 | $60,638,563 | 144,199 | Shares | Other | 2024-05-15 | |
| 2024-03-31 | $33,767,756 | 80,300 | Put | Other | 2024-05-15 | |
| 2023-12-31 | $72,045 | 202 | Shares | Other | 2024-02-14 | |
| 2023-12-31 | $14,944,054 | 41,900 | Call | Other | 2024-02-14 | |
| 2023-12-31 | $23,682,224 | 66,400 | Put | Other | 2024-02-14 | |
| 2023-09-30 BRK-A | $34,014,528 | 64 | Shares | Other | 2023-11-14 | |
| 2023-09-30 | $2,031,740 | 5,800 | Call | Other | 2023-11-14 | |
| 2023-09-30 | $26,692,860 | 76,200 | Put | Other | 2023-11-14 | |
| 2023-09-30 | $52,839,251 | 150,840 | Shares | Other | 2023-11-14 | |
| 2023-06-30 BRK-A | $3,624,670 | 7 | Shares | Other | 2023-08-14 | |
| 2023-06-30 | $719,169 | 2,109 | Shares | Other | 2023-08-14 | |
| 2023-06-30 | $50,570,300 | 148,300 | Put | Other | 2023-08-14 | |
| 2023-06-30 | $29,973,900 | 87,900 | Call | Other | 2023-08-14 | |
| 2023-03-31 BRK-A | $931,200 | 2 | Shares | Other | 2023-05-15 | |
| 2023-03-31 | $16,305,217 | 52,807 | Shares | Other | 2023-05-15 | |
| 2023-03-31 | $19,298,125 | 62,500 | Put | Other | 2023-05-15 | |
| 2023-03-31 | $19,977,419 | 64,700 | Call | Other | 2023-05-15 | |
| 2022-12-31 | $6,358,397 | 20,584 | Shares | Other | 2023-02-14 | |
| 2022-12-31 | $58,907,230 | 190,700 | Call | Other | 2023-02-14 | |
| 2022-12-31 | $33,731,880 | 109,200 | Put | Other | 2023-02-14 | |
| 2022-09-30 | $39,839,384 | 149,200 | Call | Other | 2022-11-14 | |
| 2022-09-30 | $24,752,219 | 92,698 | Shares | Other | 2022-11-14 | |
| 2022-06-30 BRK-A | $37,623,400 | 92 | Shares | Other | 2022-08-15 | |
| 2022-06-30 | $30,687,448 | 112,400 | Call | Other | 2022-08-15 | |
| 2022-06-30 | $118,005,250 | 432,222 | Shares | Other | 2022-08-15 | |
| No filing history on record for this holder in this stock. | ||||||