Superinvestor real-time filings

Form 4 filings from the last 6 months in which a superinvestor is one of the reporting owners. A superinvestor has to file a Form 4 when it owns more than 10% of a company or sits on its board, within two business days of the trade, so these filings are much more current than a 13F.

Schedule 13D and 13G filings, where investors report stakes above 5%, will be added to this page later.

Each row adds up one type of transaction in one filing. All transaction types are shown, not only open-market purchases and sales.

Insider trades
CompanyFiled (ET)Trade dateInsiderTransactionSharesAvg priceValueShares afterHolding changeFiling
LENLENNAR CORP /NEW/Sep 25, 20268:02 PM ETSep 23 – Sep 25, 2026BUFFETT WARREN E and 1 other10% OwnerPPurchaseClass A Common Stock+1.66M$81.2151+$134.74M25.38M+7.0%SEC
LENLENNAR CORP /NEW/Sep 25, 20268:02 PM ETSep 23 – Sep 25, 2026BUFFETT WARREN E and 1 other10% OwnerPPurchaseClass B Common Stock+20.68K$79.5627+$1.64M548.89K+3.9%SEC
IEPICAHN ENTERPRISES L.P.Sep 25, 20264:45 PM ETSep 23, 2026ICAHN CARL CDirector, 10% Owner, Other: CHAIRMAN OF THE BOARDJOtherDepositary Units+40.53M$7.0118+$284.2M658.92M+6.6%SEC
LENLENNAR CORP /NEW/Sep 21, 20269:31 PM ETSep 17 – Sep 21, 2026BUFFETT WARREN E and 1 other10% OwnerPPurchaseClass A Common Stock+2.67M$77.4578+$206.7M23.72M+12.7%SEC
LENLENNAR CORP /NEW/Sep 21, 20269:31 PM ETSep 17 – Sep 21, 2026BUFFETT WARREN E and 1 other10% OwnerPPurchaseClass B Common Stock+75.02K$75.9578+$5.7M528.22K+16.6%SEC
HGTYHagerty, Inc.Sep 14, 20264:10 PM ETSep 11, 2026MARKEL GROUP INC.10% OwnerCConversionClass A Common Stock+7.84M––10.94M+252.1%SEC
HGTYHagerty, Inc.Sep 14, 20264:10 PM ETSep 11, 2026MARKEL GROUP INC.10% OwnerCConversionClass A Common Stock · Derivative−7.84M––67.16M–SEC
INFQInfleqtion, Inc.Aug 21, 20267:42 PM ETAug 19 – Aug 21, 2026MAVERICK CAPITAL LTD and 2 othersDirectorSSaleCommon Stock−198.23K$12.953−$2.57M1.38M−12.6%SEC
INFQInfleqtion, Inc.Aug 21, 20267:42 PM ETAug 20, 2026MAVERICK CAPITAL LTD and 2 othersDirectorGGiftCommon Stock−350.12K$0.00$00−100.0%SEC
INFQInfleqtion, Inc.Aug 14, 20268:09 PM ETAug 4 – Aug 13, 2026MAVERICK CAPITAL LTD and 2 othersDirectorSSaleCommon Stock−52.07K$11.4823−$597.9K0−100.0%SEC
INFQInfleqtion, Inc.Aug 14, 20268:09 PM ETAug 14, 2026MAVERICK CAPITAL LTD and 2 othersDirectorPPurchaseCommon Stock+52.07K$12.4222+$646.84K0New positionSEC
DVADAVITA INC.Aug 4, 20265:27 PM ETJul 31, 2026BUFFETT WARREN E and 1 other10% OwnerSSaleCommon Stock−182.98K$199.548−$36.51M28.7M−0.6%SEC
–Jul 2, 20269:02 PM ETJun 30, 2026TRIAN FUND MANAGEMENT, L.P. and 1 otherDirector, 10% OwnerJOtherCommon Stock−25.14M––0−100.0%SEC
–Jul 2, 20269:02 PM ETJun 30, 2026TRIAN FUND MANAGEMENT, L.P. and 1 otherDirector, 10% OwnerDReturned to the companyCommon Stock−518.18K$52.00−$26.95M0−100.0%SEC
–Jul 2, 20269:01 PM ETJun 30, 2026TRIAN FUND MANAGEMENT, L.P. and 1 otherDirector, 10% OwnerJOtherCommon Stock−25.14M––0−100.0%SEC
–Jul 2, 20269:01 PM ETJun 30, 2026TRIAN FUND MANAGEMENT, L.P. and 1 otherDirector, 10% OwnerDReturned to the companyCommon Stock−518.18K$52.00−$26.95M0−100.0%SEC
IEPICAHN ENTERPRISES L.P.Jun 29, 2026Jun 25, 2026ICAHN CARL CDirector, 10% Owner, Other: CHAIRMAN OF THE BOARDJOtherDepositary Units+36.46M$7.30+$266.13M618.39M+6.3%SEC
–Jun 16, 20264:07 PM ETJun 16, 2026FAIRFAX FINANCIAL HOLDINGS LTD/ CAN and 3 othersDirector, 10% OwnerJOtherCommon Stock−13.32M––0−100.0%SEC
HHHHoward Hughes Holdings Inc.Jun 8, 20266:13 PM ETJun 4, 2026ACKMAN WILLIAM A and 5 othersDirector, 10% OwnerAGrant or awardSeries A Non-Voting Exchangeable Perpetual Preferred Stock+140K$7,142.8571+$1,000M140KNew positionSEC
INFQInfleqtion, Inc.May 29, 20269:36 PM ETAmendedMay 27, 2026MAVERICK CAPITAL LTD and 2 othersDirectorJOtherCommon Stock−968.62K$0.00$04.41M−18.0%SEC
INFQInfleqtion, Inc.May 29, 20269:36 PM ETAmendedMay 27, 2026MAVERICK CAPITAL LTD and 2 othersDirectorSSaleCommon Stock−3.07M$15.4975−$47.6M2.43M−55.8%SEC
INFQInfleqtion, Inc.May 29, 20269:36 PM ETAmendedMay 27, 2026MAVERICK CAPITAL LTD and 2 othersDirectorJOtherCommon Stock+677.89K$0.00$0328.2KNew positionSEC
INFQInfleqtion, Inc.May 29, 20268:56 PM ETMay 29, 2026MAVERICK CAPITAL LTD and 2 othersDirectorJOtherCommon Stock−2.86M$0.00$00−100.0%SEC
INFQInfleqtion, Inc.May 29, 20268:56 PM ETMay 29, 2026MAVERICK CAPITAL LTD and 2 othersDirectorSSaleCommon Stock−1.8M$16.0987−$28.94M0−100.0%SEC
INFQInfleqtion, Inc.May 29, 20268:56 PM ETMay 29, 2026MAVERICK CAPITAL LTD and 2 othersDirectorJOtherCommon Stock+1.91M$0.00$0350.12KNew positionSEC
CARTMaplebear Inc.May 27, 20265:15 PM ETMay 22, 2026Sundheim Daniel S. and 1 otherDirector, 10% OwnerAGrant or awardCommon Stock+6.05K$0.00$033.35K+22.2%SEC
INFQInfleqtion, Inc.May 26, 20266:57 PM ETMay 21 – May 22, 2026MAVERICK CAPITAL LTD and 2 othersDirectorSSaleCommon Stock−11.91M$15.6207−$186.01M0−100.0%SEC
UAUnder Armour, Inc.May 14, 20267:41 PM ETMay 12 – May 14, 2026FAIRFAX FINANCIAL HOLDINGS LTD/ CAN and 1 other10% OwnerPPurchaseClass A Common Shares+1.18M$4.9808+$5.87M44.18M+2.7%SEC
–May 14, 20267:36 PM ETMay 12, 2026TRIAN FUND MANAGEMENT, L.P. and 1 otherDirector, 10% OwnerSSaleCommon Stock−6.21M$51.6001−$320.61M25.65M−19.5%SEC
–May 14, 20267:35 PM ETMay 12, 2026TRIAN FUND MANAGEMENT, L.P. and 1 otherDirector, 10% OwnerSSaleCommon Stock−6.21M$51.6001−$320.61M25.65M−19.5%SEC
DVADAVITA INC.May 5, 20266:52 PM ETMay 1, 2026BUFFETT WARREN E and 1 other10% OwnerSSaleCommon Stock−1.22M$149.8429−$182.86M28.88M−4.1%SEC
PSUSPershing Square USA, Ltd.May 4, 20269:05 PM ETApr 30, 2026PERSHING SQUARE INC. and 3 othersDirector, 10% Owner, Other: See RemarksAGrant or awardCommon Shares of Beneficial Interest+99.66M$50.00+$4.98B4MNew positionSEC
PSUSPershing Square USA, Ltd.May 4, 20269:05 PM ETApr 30, 2026PERSHING SQUARE INC. and 3 othersDirector, 10% Owner, Other: See RemarksJOtherCommon Shares of Beneficial Interest−96M$50.00−$4.8B342.32K−99.6%SEC
PSUSPershing Square USA, Ltd.May 4, 20269:05 PM ETApr 30, 2026PERSHING SQUARE INC. and 3 othersDirector, 10% Owner, Other: See RemarksAGrant or award7.50% Series A Cumulative Preferred Shares+1M$50.00+$50M1MNew positionSEC
–Apr 23, 20268:55 PM ETApr 21, 2026ACKMAN WILLIAM A and 2 othersChief Executive OfficerJOtherCommon Stock0––422.53K0.0%SEC
–Apr 23, 20268:55 PM ETApr 21, 2026ACKMAN WILLIAM A and 2 othersChief Executive OfficerJOtherSponsor Warrants · Derivative0––––SEC
HHHHoward Hughes Holdings Inc.Apr 23, 20268:34 PM ETApr 21, 2026ACKMAN WILLIAM A and 4 othersDirector, 10% OwnerJOtherCommon Stock, par value $0.01 per share−341.03K$65.86−$22.46M18.51M−1.8%SEC
HHHHoward Hughes Holdings Inc.Apr 23, 20268:34 PM ETApr 21, 2026ACKMAN WILLIAM A and 4 othersDirector, 10% OwnerJOtherCommon Stock, par value $0.01 per share+341.03K$65.86+$22.46M341.03KNew positionSEC
SEGSeaport Entertainment Group Inc.Apr 23, 20268:23 PM ETApr 21, 2026ACKMAN WILLIAM A and 4 othersDirector, 10% OwnerJOtherCommon Stock, par value $0.01 per share−90.88K$22.25−$2.02M4.93M−1.8%SEC
SEGSeaport Entertainment Group Inc.Apr 23, 20268:23 PM ETApr 21, 2026ACKMAN WILLIAM A and 4 othersDirector, 10% OwnerJOtherCommon Stock, par value $0.01 per share+90.88K$22.25+$2.02M90.88KNew positionSEC
IEPICAHN ENTERPRISES L.P.Apr 17, 2026Apr 15, 2026ICAHN CARL CDirector, 10% Owner, Other: CHAIRMAN OF THE BOARDJOtherDepositary Units+32.54M$7.67+$249.56M581.94M+5.9%SEC
INFQInfleqtion, Inc.Apr 14, 20268:54 PM ETApr 10, 2026MAVERICK CAPITAL LTD and 2 othersDirectorAGrant or awardCommon Stock · Derivative+33.93K$0.00$033.93K–SEC
VISKViskase Holdings, Inc.Mar 27, 20267:50 PM ETMar 25, 2026ICAHN CARL C and 2 others10% OwnerDReturned to the companyPreferred Stock−39.28K––0−100.0%SEC
VISKViskase Holdings, Inc.Mar 27, 20267:50 PM ETMar 25 – Mar 26, 2026ICAHN CARL C and 2 others10% OwnerAGrant or awardCommon Stock+13.07M––13.43M+3,623.7%SEC