OPPENHEIMER & CO INC has opened a new $98.0M position in $BRK.B, per a new SEC 13F filing. This disclosure reflects the funds' holdings for the 03-31-2026 report period. You can see the fund's full portfolio on Quiver Quantitative, and also track the largest institutional owners of $BRK.B.
$BRK.B Hedge Fund Activity
We have seen 1,980 institutional investors add shares of $BRK.B stock to their portfolio, and 2,092 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC removed 18,303,616 shares (-69.7%) from their portfolio in Q4 2025, for an estimated $9,200,312,582
- CANERECTOR INC removed 13,797,710 shares (-99.8%) from their portfolio in Q4 2025, for an estimated $6,935,418,931
- BLACKROCK, INC. added 6,572,332 shares (+5.7%) to their portfolio in Q4 2025, for an estimated $3,303,582,679
- J. STERN & CO. LLP added 4,893,596 shares (+50165.0%) to their portfolio in Q4 2025, for an estimated $2,459,766,029
- AUTO-OWNERS INSURANCE CO removed 4,846,444 shares (-99.8%) from their portfolio in Q1 2026, for an estimated $2,313,595,436
- CORIENT PRIVATE WEALTH LLC added 3,729,753 shares (+267.9%) to their portfolio in Q4 2025, for an estimated $1,874,760,345
- VANGUARD GROUP INC added 2,777,083 shares (+1.8%) to their portfolio in Q4 2025, for an estimated $1,395,900,769
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard.
$BRK.B Government Contracts
We have seen $40,543,857 of award payments to $BRK.B over the last year.
Here are some of the awards which we have have seen pay out the most over the last year:
- 1OZ SILVER BLANK (UPSET SILVER AMERICAN EAGLE PLANCHETS) MINT MAC PRECIOUS BLANKS: $8,200,000
- 8511378077!COAT,MAN'S: $5,338,656
- OPTICAL LOSS TEST K: $4,809,055
- THIS IS A FIRM FIXED PRICE DELIVERY ORDER UNDER CONTRACT W31P4Q20D0046, FOR OPTIMAL TIME DOMAIN REFLECTORS,...: $2,488,309
- ELECTRIC SERVICES: $1,323,000
To track government contracts to publicy traded companies, check out Quiver Quantitative's government contracts dashboard.
$BRK.B Congressional Stock Trading
Members of Congress have traded $BRK.B stock 15 times in the past 6 months. Of those trades, 5 have been purchases and 10 have been sales.
Here’s a breakdown of recent trading of $BRK.B stock by members of Congress over the last 6 months:
- SENATOR TINA SMITH has traded it 2 times. They made 0 purchases and 2 sales worth up to $500,000 on 03/31, 01/27.
- REPRESENTATIVE GILBERT RAY CISNEROS, JR. has traded it 4 times. They made 1 purchase worth up to $15,000 on 11/18 and 3 sales worth up to $45,000 on 03/25, 03/16, 12/24.
- REPRESENTATIVE MARK ALFORD sold up to $15,000 on 03/16.
- REPRESENTATIVE AUGUST PFLUGER purchased up to $50,000 on 03/13.
- REPRESENTATIVE ROBERT BRESNAHAN sold up to $100,000 on 11/19.
- REPRESENTATIVE RICHARD MCCORMICK purchased up to $15,000 on 11/05.
- SENATOR MARKWAYNE MULLIN sold up to $50,000 on 11/03.
- REPRESENTATIVE LISA C. MCCLAIN has traded it 3 times. They made 1 purchase worth up to $15,000 on 10/30 and 2 sales worth up to $30,000 on 10/31, 10/30.
- REPRESENTATIVE MARJORIE TAYLOR GREENE purchased up to $15,000 on 10/24.
To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard.
Note that there may be inaccuracies in these estimates due to filing errors by the funds, parsing errors by us, or other anomalies.
Check out Quiver Quantitative's $BRK.B ticker page for more data.
