2026-07-28T12:40:54-05:00 2025-12-31 Sayles & Evans One West Church Street Elmira NY 14901 990PF 2025-01-01 136077788 Louis P Singer Fund Inc c/o Market Street Trust Company % MARKET STREET SERVICES LLC LOUI 8009626876 100 Market Street Suite 302 Portsmouth NH 03801 MIDGE KORCZAK PRESIDENT 8009626876 2026-07-15 Steven E Agan P00545842 6077342271 2026-07-09 2025 2025-03-06 01:10:19Z X 4929775 X 1067071 42711 42711 496866 496972 496866 1606648 539577 0 36012 36012 1239 1239 75 37326 37251 0 480000 480000 517326 37251 480000 1089322 502326 0 62062 84701 84701 396801 396892 4028012 655011 654896 817062 1113874 1136489 4929775 0 0 X 1113874 1136489 1113874 1136489 1113874 1136489 1113874 1089322 167 2203363 1066874 1136489 BERKSHIRE HATHAWAY, INC. CLASS B D 2011-01-01 2025-08-21 461468 106 461362 461362 CAPITAL GAIN DIVIDENDS P 35504 496866 6982 6982 6982 5576 0 7500 13076 6094 6094 false false false false false false false true true DE true false true false false true MARKET STREET SERVICES LLC 8009626876 80 E MARKET ST STE 201 CORNING NY 14830 false false false false false false false false false false false false false false false false false false false false false Midge A Korczak 100 Market Street Suite 302 Portsmouth NH 03801 President 0 0 0 0 Leslie S Lomas 100 Market Street Suite 302 Portsmouth NH 03801 Vice President 0 0 0 0 PETER TIMMINS 100 Market Street Suite 302 Portsmouth NH 03801 TREASURER 0 0 0 0 AYAL KORCZAK 100 Market Street Suite 302 Portsmouth NH 03801 SECRETARY 0 0 0 0 NONE 3780877 55617 0 3836494 0 3836494 57547 3778947 188947 188947 6982 6982 181965 181965 181965 480000 0 0 0 0 480000 181965 0 2023 2022 2021 0 12027 193769 890331 185515 143969 1425611 480000 0 181965 298035 1723646 0 0 0 0 12027 1711619 193769 890331 185515 143969 298035 LESLIE LOMAS MIDGE KORCZAK NONE X Boulder County Latina League 6525 Gunpark Dr Ste 370-184 Boulder CO 80301 NONE PC To further organization's goals 35000 Boulder Housing Partners Foundation 4800 N Broadway Boulder CO 80304 None PC To further organization's goals 35000 Boulder JCC 6007 Oreg Avenue Boulder CO 80303 None PC To further organization's goals 10000 Colorado Public Radio PO Box 17429 Denver CO 80217 None PC To further organization's goals 10000 Colorado MahlerFest PO Box 1314 Boulder CO 80306 None PC To further organization's goals 25000 Emergency Family Assistance Association 1575 Yarmouth Avenue Boulder CO 80304 None PC To further organization's goals 10000 Longmont Symphony Orchestra PO Box 74 Longmont CO 80502 None PC To further organization's goals 10000 Planned Parenthood of the Rocky Mountains 7155 E 38th Ave Denver CO 80207 None PC To further organization's goals 50000 Rocky Mountain PBS 2101 Arapahoe Street Denver CO 80205 None PC To further organization's goals 10000 NAMI Greater Orlando 150 Cranes Roost Blvd Suite 2250 Altamonte Springs FL 32701 NONE PC To further organization's goals 2500 3rd Law DanceTheater 2026 19th Street Boulder CO 80302 NONE PC To further organization's goals 10000 American Red Cross PO Box 37839 Boone IA 500370839 NONE PC To further organization's goals 2000 Boulder Chorale 685 Inca Parkway Boulder CO 80303 NONE PC To further organization's goals 10000 Boulder Valley Health Center 2855 Valmont Road Boulder CO 80301 NONE PC To further organization's goals 10000 California Fire Foundation 1780 Creekside Oaks Drive Sacramento CA 95833 NONE PC To further organization's goals 2000 Clayton Early Learning 3801 Martin Luther King Blvd Denver CO 80205 NONE PC To further organization's goals 5000 Congregation Har Hashem 3950 Baseline Road Boulder CO 80303 NONE PC To further organization's goals 25000 Dawson School 10455 Dawson Drive Lafayette CO 80026 NONE PC To further organization's goals 1000 Empire State Croquet Foundation Inc PO Box 6877 New York NY 10150 NONE PC To further organization's goals 1000 Groundworks Art Lab 3750 Canfield Street Boulder CO 80301 NONE PC To further organization's goals 10000 Kenny Gordon Foundation 400 East 56th Street Ste 31N New York NY 10022 NONE PC To further organization's goals 500 Los Angeles Regional Food Bank 1734 E 41st Street Los Angeles CA 90058 NONE PC To further organization's goals 2000 Mary's Hands 9175 Arapahoe Road Boulder CO 80303 NONE PC To further organization's goals 10000 Palestine Children's Relief Fund PO Box 861716 Los Angeles CA 90086 NONE PC To further organization's goals 10000 Pasadena Humane 361 S Raymond Ave Pasadena CA 91105 NONE PC To further organization's goals 2000 Seicento Baroque Ensemble PO Box 171 Boulder CO 80306 NONE PC To further organization's goals 10000 Stanley M Isaacs Neighborhood Center 415 East 93rd Street New York NY 10128 NONE PC To further organization's goals 2500 The Cathedral School 319 E 74th Street New York NY 10021 NONE PC To further organization's goals 30000 The Center For Investigative Reporting PO Box 584 San Francisco CA 94104 NONE PC To further organization's goals 1500 The Jam Session Inc 22 Denison Road Sag Harbor NY 11963 NONE PC To further organization's goals 2500 United States Croquet Association 700 Florida Mango Road West Palm Beach FL 33406 NONE PC To further organization's goals 1000 University Of Colorado Foundation PO Box 561690 Denver CO 80256 NONE PC To further organization's goals 134500 480000 14 42711 18 496866 539577 539577 false false false false false false false false false false X X 1 Leslie S Lomas 4840 Thunderbird Drive Apt 483 Boulder CO 80303 566651 X 2 Midge A Korczak 4875 Sioux Drive Apt 1 Boulder CO 80303 500420 X 1 1,128 SHS OF BERKSHIRE HATHAWAY, INC CLASS B; BASIS: $84.73 566651 2025-12-17 2 1,005 SHS OF BERKSHIRE HATHAWAY, INC CLASS B; BASIS $111.97 500420 2025-12-22 ALPHABET 19890 156500 APPLE, INC. 10276 190302 AUTOZONE INC. 37287 50872 BANK OF AMERICA 47545 83325 BERKSHIRE HATHAWAY INC CL B 420 2342349 BOEING COMPANY 36201 47766 CANADIAN NATIONAL RAILROAD 661 33609 CARRIER GLOBAL CORP 10019 17437 CISCO 21748 53921 INTEL 23137 42435 JOHNSON & JOHNSON 19297 62085 JP MORGAN CHASE 12701 62833 MCDONALDS 11738 30563 MICROSOFT 18160 236974 MORGAN STANLEY 21034 266295 ORACLE 43559 194910 PFIZER 16193 12450 SERVICE CORP INTERNATIONAL 11660 23391 US BANCORP 9637 53360 VISA 25729 66635 VANGUARD EXPLORER VALUE FUND FMV 180842 189620 ARTISAN INT'L VALUE FUND INST. FMV 145463 183629 BLACKSTONE GROUP INC FMV 32461 54720 VANGUARD FTSE ALL WORLD ADM FD FMV 186891 284508 BNY MELLON FAMILY FD INT'L STK FMV 109239 104585 APPRECIATION ON CONTRIBUTED STOCK 1066874 FILING FEES 25 REGISTERED AGENT FEE 50 OTHER BASIS ADJUSTMENTS 167 BA CALL 01/20/2023 FIDUCIARY FEES 36012 36012 Leslie S Lomas 4840 Thunderbird Drive Apt 483 Boulder CO 80303 Midge A Korczak 4875 Sioux Drive Apt 1 Boulder CO 80303 FOREIGN TAXES PAID 1239 1239