Berkshire Hathaway

Warren Buffett · Insurers · notable · $263B reported 13(f) long value · filed as BERKSHIRE HATHAWAY INC · latest quarter 2026-03-31 · CIK 1067983 · EDGAR ↗
sum of disclosed values for 2026-03-31; 0 positions carry a NULL value and are excluded from the sum, surfaced here rather than folded away
$263B
ALL retained default holdings for this (filer, period), including NULL-value ones
90
positions with no comparable holding in the prior quarter (kind new), 2026-03-31
3
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record
16
A quarter-end snapshot. Filed up to 45 days later, so this page is not current holdings and never a complete portfolio. what a 13F is — and is not ↓ methodology §13F ↗
FILING WINDOW OPEN
Quarter 2026-09-30: the 13F window is open until 2026-11-16. Rankings and QoQ moves that touch this quarter are provisional by construction — filers who have not yet reported are not zeros.

Position changes — into 2026-03-31

by shares · Δ value · filing link · how changes are classified §
Period
Position changes into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match identity_reconciled_by_cusipthe reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE classified_by_value · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stakederived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zeroreported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated shares_unit_mismatchPrev valueCurr valuePrev sharesCurr shares
position key pos:13234 · issuer key iss:230 COMTRIM−$3.4B−3,671,769$28.5B$25.0B517,295,934513,624,165
position key pos:11717 · issuer key iss:440 COMTRIM−$2.4B−45,780,506$19.8B$17.5B130,156,36284,375,856
position key pos:15142 · issuer key iss:89 CAP STK CL AADD+$10.0B+36,403,656$5.6B$15.6B17,846,14254,249,798
position key pos:14365 · issuer key iss:560 COMTRIM+$1.0B−1,658,480$3.6B$4.6B31,759,06530,100,585
position key pos:12359 · issuer key iss:566 COM NEWNEW+$2.6B+39,809,456$0$2.6B—39,809,456
position key pos:18182 · issuer key iss:1303 CL AADD+$917M+10,080,791$352M$1.3B5,065,74415,146,535
position key pos:17821 · issuer key iss:89 CAP STK CL CNEW+$1.0B+3,585,215$0$1.0B—3,585,215
position key pos:12620 · issuer key iss:1116 COM SHS SER CTRIM+$88.4M−330,518$908M$996M10,917,66110,587,143
position key pos:15921 · issuer key iss:1110 CL AADD+$152M+3,048,692$725M$877M7,050,95010,099,642
position key pos:10172 · issuer key iss:1332 COMTRIM−$384M−2,500,674$1.0B$661M6,407,7493,907,075
position key pos:13697 · issuer key iss:507 CL ATRIM−$1.7B−12,367,110$1.8B$94.9M13,000,000632,890
position key pos:11700 · issuer key iss:1165 COMNEW+$55.0M+3,038,355$0$55.0M—3,038,355
position key pos:13326 · issuer key iss:1110 CL BADD+$2.8M+56,723$17.2M$20.0M180,980237,703
position key pos:10520 · issuer key iss:2024 ORD SHSEXIT‡e−$124M−780,133$124M$0780,133—
position key pos:11056 · issuer key iss:896 CL AEXIT‡e−$327M−1,294,612$327M$01,294,612—
position key pos:11701 · issuer key iss:1466 COMEXIT‡e−$702M−3,068,885$702M$03,068,885—
position key pos:12848 · issuer key iss:1921 COM CL AEXIT‡e−$2.9B−8,297,460$2.9B$08,297,460—
position key pos:14175 · issuer key iss:95 COMEXIT‡e−$525M−2,276,000$525M$02,276,000—
position key pos:14206 · issuer key iss:1193 CL AEXIT‡e−$2.3B−3,986,648$2.3B$03,986,648—
position key pos:14354 · issuer key iss:2031 SHS CL AEXIT‡e−$1.3B−3,602,995$1.3B$03,602,995—
position key pos:14426 · issuer key iss:1118 COM LBTY ONE S CEXIT‡e−$297M−3,018,555$297M$03,018,555—
position key pos:14479 · issuer key iss:433 CL AEXIT‡e−$221M−1,060,882$221M$01,060,882—
position key pos:14895 · issuer key iss:596 COMEXIT‡e−$1.4B−3,350,000$1.4B$03,350,000—
position key pos:15594 · issuer key iss:574 SPON ADR NEWEXIT‡e−$19.6M−227,750$19.6M$0227,750—
position key pos:16115 · issuer key iss:1869 COMEXIT‡e−$1.7B−5,039,564$1.7B$05,039,564—
position key pos:18125 · issuer key iss:1092 CL AEXIT‡e−$152M−1,202,410$152M$01,202,410—
position key sid:sec:prov:0dadc2440aefac63e807c58f52840520 · issuer key cusip6:047726 COM SER CEXIT‡e−$4.6M−115,428$4.6M$0115,428—
position key sid:sec:prov:3b6c450c94b0758fbbc866002762462a · issuer key cusip6:G9001E COM CL CEXIT‡e−$9.6M−1,284,020$9.6M$01,284,020—
position key sid:sec:prov:cd76b1d0504c361157013f558d333f9c · issuer key cusip6:G9001E COM CL AEXIT‡e−$17.7M−2,396,665$17.7M$02,396,665—

Flags: no row carries a flag.

1–20 of the 29 changes on this page

Mark-to-market only (no share change) · 16

Positions whose share count is identical in both quarters; the value changed with price, not with a decision.

Positions held with no share change into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match identity_reconciled_by_cusipthe reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE classified_by_value · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stakederived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zeroreported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated shares_unit_mismatchPrev valueCurr valuePrev sharesCurr shares
position key pos:13215 · issuer key iss:144 COMNO CHANGE−$4.1B0$62.0B$57.8B227,917,808227,917,808
position key pos:11849 · issuer key iss:104 COMNO CHANGE−$10.2B0$56.1B$45.9B151,610,700151,610,700
position key pos:10493 · issuer key iss:471 COMNO CHANGE+$2.5B0$28.0B$30.4B400,000,000400,000,000
position key pos:15281 · issuer key iss:1346 COMNO CHANGE+$6.3B0$10.9B$17.2B264,941,431264,941,431
position key pos:11267 · issuer key iss:2257 COMNO CHANGE+$473M0$10.7B$11.2B34,249,18334,249,183
position key pos:16504 · issuer key iss:1251 COMNO CHANGE−$1.8B0$12.6B$10.8B24,669,77824,669,778
position key pos:15837 · issuer key iss:1075 COMNO CHANGE−$573M0$7.9B$7.3B325,634,818325,634,818
position key pos:10263 · issuer key iss:1078 COMNO CHANGE+$494M0$3.1B$3.6B50,000,00050,000,000
position key pos:13334 · issuer key iss:1669 COMMON STOCKNO CHANGE+$385M0$2.5B$2.9B124,807,117124,807,117
position key pos:11677 · issuer key iss:1901 COMNO CHANGE+$48.6M0$2.2B$2.2B8,989,8808,989,880
position key pos:16278 · issuer key iss:390 COMNO CHANGE−$428M0$1.7B$1.3B7,150,0007,150,000
position key pos:13355 · issuer key iss:85 COMNO CHANGE−$176M0$1.3B$1.1B29,000,00029,000,000
position key pos:15268 · issuer key iss:1116 COM SER ANO CHANGE+$50.6M0$406M$457M4,986,5884,986,588
position key pos:15163 · issuer key iss:1140 COMNO CHANGE−$45.4M0$457M$412M5,664,7935,664,793
position key pos:18081 · issuer key iss:1268 COMNO CHANGE−$7.8M0$81.0M$73.2M11,11211,112
position key pos:11840 · issuer key iss:1031 COMNO CHANGE−$9.0M0$26.9M$17.9M433,558433,558

Flags: no row carries a flag.

Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.
Truncated by Public Filings. Changes compare every position with a security identifier, new and exited included; holdings without one are counted, not compared. methodology §13F ↗

Reported positions — 2026-03-31

1–26 of 26 issuers · $263B disclosed value over 90 rows · 0 undisclosed-value rows
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this build publishes the selected quarter and the one before it, so a displayed change can be inspected on both sides
Positions BERKSHIRE HATHAWAY INC reported for the quarter ended 2026-03-31, as that filer reported them
This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names.a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filingShare of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets.value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0SharesWt
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)APPLE INC
1 position · 12 reported rows
Rows BERKSHIRE HATHAWAY INC reported for APPLE INC, as it reported them
APPLE INC · COM CUSIP — $20.5B80,664,820
APPLE INC · COM CUSIP — $15.6B61,542,988
APPLE INC · COM CUSIP — $8.8B34,724,000
APPLE INC · COM CUSIP — $3.9B15,532,000
APPLE INC · COM CUSIP — $3.7B14,472,000
APPLE INC · COM CUSIP — $1.8B7,204,000
APPLE INC · COM CUSIP — $975M3,840,000
APPLE INC · COM CUSIP — $958M3,776,000
APPLE INC · COM CUSIP — $691M2,724,000
APPLE INC · COM CUSIP — $688M2,712,000
APPLE INC · COM CUSIP — $176M692,000
APPLE INC · COM CUSIP — $8.6M34,000
$57.8B227,917,80822.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)AMERICAN EXPRESS CO
1 position · 3 reported rows
Rows BERKSHIRE HATHAWAY INC reported for AMERICAN EXPRESS CO, as it reported them
AMERICAN EXPRESS CO · COM CUSIP — $45.1B149,061,045
AMERICAN EXPRESS CO · COM CUSIP — $423M1,399,713
AMERICAN EXPRESS CO · COM CUSIP — $348M1,149,942
$45.9B151,610,70017.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)COCA COLA CO
1 position · 10 reported rows
Rows BERKSHIRE HATHAWAY INC reported for COCA COLA CO, as it reported them
COCA COLA CO · COM CUSIP — $21.5B282,722,729
COCA COLA CO · COM CUSIP — $6.1B80,283,200
COCA COLA CO · COM CUSIP — $1.1B14,990,400
COCA COLA CO · COM CUSIP — $1.1B14,411,200
COCA COLA CO · COM CUSIP — $270M3,552,000
COCA COLA CO · COM CUSIP — $139M1,824,000
COCA COLA CO · COM CUSIP — $73.0M960,000
COCA COLA CO · COM CUSIP — $60.8M800,000
COCA COLA CO · COM CUSIP — $28.3M371,471
COCA COLA CO · COM CUSIP — $6.5M85,000
$30.4B400,000,00011.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)BANK AMERICA CORP
1 position · 9 reported rows
Rows BERKSHIRE HATHAWAY INC reported for BANK AMERICA CORP, as it reported them
BANK AMERICA CORP · COM CUSIP — $15.2B310,800,000
BANK AMERICA CORP · COM CUSIP — $6.1B125,720,000
BANK AMERICA CORP · COM CUSIP — $1.4B28,238,665
BANK AMERICA CORP · COM CUSIP — $1.0B21,000,000
BANK AMERICA CORP · COM CUSIP — $580M11,900,000
BANK AMERICA CORP · COM CUSIP — $478M9,800,000
BANK AMERICA CORP · COM CUSIP — $191M3,920,000
BANK AMERICA CORP · COM CUSIP — $102M2,100,000
BANK AMERICA CORP · COM CUSIP — $7.1M145,500
$25.0B513,624,1659.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CHEVRON CORPORATION
1 position · 4 reported rows
Rows BERKSHIRE HATHAWAY INC reported for CHEVRON CORPORATION, as it reported them
CHEVRON CORPORATION · COM CUSIP — $12.1B58,251,749
CHEVRON CORPORATION · COM CUSIP — $2.8B13,477,678
CHEVRON CORPORATION · COM CUSIP — $1.9B9,192,171
CHEVRON CORPORATION · COM CUSIP — $715M3,454,258
$17.5B84,375,8566.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)OCCIDENTAL PETE CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$17.2B264,941,4316.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ALPHABET INC
2 positions · 5 reported rows
Rows BERKSHIRE HATHAWAY INC reported for ALPHABET INC, as it reported them
ALPHABET INC · CAP STK CL A CUSIP — $11.9B41,283,098
ALPHABET INC · CAP STK CL A CUSIP — $1.9B6,700,000
ALPHABET INC · CAP STK CL A CUSIP — $1.8B6,250,000
ALPHABET INC · CAP STK CL C CUSIP — $1.0B3,585,215
ALPHABET INC · CAP STK CL A CUSIP — $4.8M16,700
$16.6B57,835,0136.3%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CHUBB LTD SWITZ · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$11.2B34,249,1834.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)MOODYS CORP
1 position · 3 reported rows
Rows BERKSHIRE HATHAWAY INC reported for MOODYS CORP, as it reported them
MOODYS CORP · COM CUSIP — $5.5B12,623,750
MOODYS CORP · COM CUSIP — $5.2B11,973,928
MOODYS CORP · COM CUSIP — $31.5M72,100
$10.8B24,669,7784.1%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)KRAFT HEINZ CO · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$7.3B325,634,8182.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)DAVITA INC
1 position · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for DAVITA INC, as it reported them
DAVITA INC · COM CUSIP — $2.3B15,126,977
DAVITA INC · COM CUSIP — $2.3B14,973,608
$4.6B30,100,5851.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)KROGER CO
1 position · 5 reported rows
Rows BERKSHIRE HATHAWAY INC reported for KROGER CO, as it reported them
KROGER CO · COM CUSIP — $2.0B27,257,260
KROGER CO · COM CUSIP — $1.2B16,107,090
KROGER CO · COM CUSIP — $388M5,367,119
KROGER CO · COM CUSIP — $55.6M768,531
KROGER CO · COM CUSIP — $36.2M500,000
$3.6B50,000,0001.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)SIRIUSXM HOLDINGS INC
1 position · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for SIRIUSXM HOLDINGS INC, as it reported them
SIRIUSXM HOLDINGS INC · COMMON STOCK CUSIP — $2.5B108,822,227
SIRIUSXM HOLDINGS INC · COMMON STOCK CUSIP — $369M15,984,890
$2.9B124,807,1171.1%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)DELTA AIR LINES INC · COM NEW CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$2.6B39,809,4561.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)VERISIGN INC
1 position · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for VERISIGN INC, as it reported them
VERISIGN INC · COM CUSIP — $2.0B8,016,933
VERISIGN INC · COM CUSIP — $242M972,947
$2.2B8,989,8800.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LIBERTY LIVE HOLDINGS INC
2 positions · 8 reported rows
Rows BERKSHIRE HATHAWAY INC reported for LIBERTY LIVE HOLDINGS INC, as it reported them
LIBERTY LIVE HOLDINGS INC · COM SHS SER C CUSIP — $518M5,507,583
LIBERTY LIVE HOLDINGS INC · COM SHS SER C CUSIP — $327M3,479,651
LIBERTY LIVE HOLDINGS INC · COM SER A CUSIP — $301M3,284,775
LIBERTY LIVE HOLDINGS INC · COM SHS SER C CUSIP — $135M1,437,289
LIBERTY LIVE HOLDINGS INC · COM SER A CUSIP — $92.7M1,011,698
LIBERTY LIVE HOLDINGS INC · COM SER A CUSIP — $41.9M456,768
LIBERTY LIVE HOLDINGS INC · COM SER A CUSIP — $21.4M233,347
LIBERTY LIVE HOLDINGS INC · COM SHS SER C CUSIP — $15.3M162,620
$1.5B15,573,7310.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CAPITAL ONE FINL CORP
1 position · 3 reported rows
Rows BERKSHIRE HATHAWAY INC reported for CAPITAL ONE FINL CORP, as it reported them
CAPITAL ONE FINL CORP · COM CUSIP — $561M3,073,787
CAPITAL ONE FINL CORP · COM CUSIP — $390M2,137,000
CAPITAL ONE FINL CORP · COM CUSIP — $354M1,939,213
$1.3B7,150,0000.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)NEW YORK TIMES CO MTN BE
1 position · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for NEW YORK TIMES CO MTN BE, as it reported them
NEW YORK TIMES CO MTN BE · CL A CUSIP — $1.2B13,746,535
NEW YORK TIMES CO MTN BE · CL A CUSIP — $117M1,400,000
$1.3B15,146,5350.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ALLY FINL INC
1 position · 6 reported rows
Rows BERKSHIRE HATHAWAY INC reported for ALLY FINL INC, as it reported them
ALLY FINL INC · COM CUSIP — $499M12,719,675
ALLY FINL INC · COM CUSIP — $190M4,836,250
ALLY FINL INC · COM CUSIP — $166M4,228,200
ALLY FINL INC · COM CUSIP — $123M3,137,000
ALLY FINL INC · COM CUSIP — $110M2,803,875
ALLY FINL INC · COM CUSIP — $50.0M1,275,000
$1.1B29,000,0000.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LENNAR CORP
2 positions · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for LENNAR CORP, as it reported them
LENNAR CORP · CL A CUSIP — $877M10,099,642
LENNAR CORP · CL B CUSIP — $20.0M237,703
$897M10,337,3450.3%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)NUCOR CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$661M3,907,0750.3%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LOUISIANA PAC CORP
1 position · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for LOUISIANA PAC CORP, as it reported them
LOUISIANA PAC CORP · COM CUSIP — $316M4,344,909
LOUISIANA PAC CORP · COM CUSIP — $96.0M1,319,884
$412M5,664,7930.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CONSTELLATION BRANDS INC · CL A CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$94.9M632,8900.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)NVR INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$73.2M11,1120.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)MACYS INC
1 position · 2 reported rows
Rows BERKSHIRE HATHAWAY INC reported for MACYS INC, as it reported them
MACYS INC · COM CUSIP — $30.1M1,662,129
MACYS INC · COM CUSIP — $24.9M1,376,226
$55.0M3,038,3550.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)JEFFERIES FINANCIAL GROUP IN · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$17.9M433,5580.0%

1–20 of 26 issuers

Change kind and share change are in Position changes above; Congress overlap is planned.

1–26 of 26 issuers · page 1 of 1
One line per issuer, largest first; a row with no issuer key stands on its own line. Open a line for its rows as this filer reported them. The list holds every row this filer reported for the quarter. Issuer totals on the holders pages count each manager's own report once; that never removes a row here. how positions are grouped ↗

Book shape

2026-03-31 · concentration · vs tracked median · tick = median
Top-25 concentration
99.9%above median 80.0%
Concentration index
1,185 bpsabove median 446 bps
Positions with value
90 / 90median book 97.5 positions

Concentration uses reported 13F long value, not total assets. The index is withheld when any position lacks a value. Medians are over the 8,748 tracked filers with a 2026-03-31 book; the index median over the 8,662 with a complete book.

holdings whose <value> did not parse — retained and counted, never zero-filled: 0 · share of the period's disclosed value held in the top-N positions; denominator is reported 13F value, not total assets: 99.9% · integer Herfindahl–Hirschman index in basis points over disclosed position values: 1,185 · QoQ moves: 45

Filing history

AVAILABLE QUARTERS
Available filing periods
PeriodSource
2025-09-30EDGAR ↗
2025-12-31EDGAR ↗
2026-03-31EDGAR ↗

PLANNED sector rotation · Congress overlap · signals for this filer

Complete source filings on SEC EDGAR

The complete filing on EDGAR.

The position list above is served from the published Public Filings build, each position as this filer reported it; where the page cannot embed every reported row, the list says how many it leaves out. This block is provenance, not a substitute: the filing itself is the record, and it is one click away. Public Filings decided on 2026-08-01 to serve this list from its published build; filings newer than this build are on EDGAR.

Open BERKSHIRE HATHAWAY INC's 13F filings on SEC EDGAR ↗
Notes on this data

Quarter-end holdings as filed

Explore the full published position list and its source filing. This record excludes the manager’s cash, shorts and non-13(f) assets.

Compare consecutive quarters

Position changes retain the producer’s classification and comparability flags. Share counts and reported values describe different changes.

A snapshot, not current holdings

Use the quarter selector to inspect available periods. Unknown values stay unknown and each table states its coverage.

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings. A position may have been changed or closed before you ever see it, and is older still by however long ago that quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars with unit_basis carried on every record.

Affiliated managers may report the same position (otherManager), so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice (ARCHITECTURE.md §5.2 / M2-CONTRACT §5).