Position in BRK-B
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$202,545,380
+$26,084,569 QoQ
Shares Held
422,674
+20.4% QoQ
Ownership
0.030%
of shares outstanding
% of Portfolio
0.29%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
23 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 Mar 31, 2026CallValue
$3,162,720
CallShares
6,600
PutValue
$143,760
PutShares
300
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 Mar 31, 2026MARSHALL WACE, LLP holds $343,033,065 across 4 Insurance - Diversified names. BRK-B ranks #1 (59.0% of the industry book) .
All Filings in BRK-B
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 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 | $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 | $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 | $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 | $30,687,448 | 112,400 | Call | Other | 2022-08-15 | |
| 2022-06-30 | $118,005,250 | 432,222 | Shares | Other | 2022-08-15 | |
| 2022-06-30 | $21,732,392 | 79,600 | Put | Other | 2022-08-15 | |
| 2022-03-31 | $30,103,223 | 85,300 | Put | Other | 2022-05-16 | |
| 2022-03-31 | $35,714,492 | 101,200 | Call | Other | 2022-05-16 | |
| 2022-03-31 | $193,457,849 | 548,179 | Shares | Other | 2022-05-16 | |
| 2021-12-31 | $47,388,510 | 158,490 | Shares | Other | 2022-02-14 | |
| 2021-12-31 | $3,169,400 | 10,600 | Call | Other | 2022-02-14 | |
| No filing history on record for this holder in this stock. | ||||||