2026-05-30T17:00:13-04:00 2025-12-31 990PF 2025-01-01 320780914 Tang Foundation % Yinjia Zhang TANG 4016541887 221 Whitney Ct Walnut Creek CA 94598 Yinjia Zhang Chief financial officer 4016541887 2026-06-01 2025 2025-03-06 01:10:19Z X X X 609063 X 350135 3172 3172 1686 1686 0 0 0 0 87514 627513 409119 0 0 0 0 0 386 0 0 442893 413977 0 0 0 0 0 0 0 0 0 0 0 0 0 98 0 0 0 1644 1644 0 0 0 0 0 0 2 2 0 0 155 155 0 0 0 0 0 5281 1761 0 1761 280 140 0 140 0 0 0 0 1138 480 0 197 8598 4182 0 2098 83737 83737 92335 4182 0 85835 350558 409795 0 5 14102 14102 0 41596 41596 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 281587 215549 215549 0 0 0 336941 336941 0 0 875 875 281592 609063 609063 0 0 0 0 0 0 0 0 0 12888 6639 12888 6639 X 0 0 0 0 268704 602424 268704 602424 281592 609063 268704 350558 1 619263 16839 602424 Public Traded Securities 487720 0 80104 407616 407616 Public Traded Securities 97577 0 96485 1092 1092 Enterprise Products Partners L.P. 10 1 10 10 10 14 purchased P 2025-10-01 2025-12-17 25491 0 24775 716 716 Energy Transfer LP units ET PTP units P 2025-10-01 2025-10-09 16725 0 17030 -305 -305 409119 5696 5696 5696 0 0 0 5696 5696 0 0 0 false false false 0 0 0 false false true true false true true CA true false true false false true N A Yinjia Zhang 4016541887 221 Whitney Ct WALNUT CREEK CA 94598 false false false false true false false false false false false false false false false false false false false false false false Yuhang Tang 221 Whitney Ct WALNUT CREEK CA 94598 CEO Director 5.00 0 0 0 Yinjia Zhang 221 Whitney Ct WALNUT CREEK CA 94598 CFO Director 15.00 0 0 0 Yingchun Bu 221 Whitney Ct WALNUT CREEK CA 94598 Director 1.00 0 0 0 NONE NONE 336520 64245 0 400765 0 0 400765 6011 394754 19738 19738 5696 0 5696 14042 0 14042 0 14042 85835 0 0 0 0 85835 14042 0 0 0 0 0 0 9806 9806 85835 0 14042 71793 0 0 81599 0 0 0 0 0 0 0 81599 0 0 0 9806 71793 Yuhang Tang Yinjia Zhang X Brown University 1 Prospect Street Providence RI 02912 No Relationship PC Support for applied mathematics education and research through Brown University Applied Mathematics Discretionary Fund 6000 Brown University 1 Prospect Street Providence RI 02912 No Relationship PC Support for applied mathematics education and research through Brown University Applied Mathematics Discretionary Fund 50000 Brown University 1 Prospect Street Providence RI 02912 No Relationship PC Support for applied mathematics education and research through Brown University Applied Mathematics Discretionary Fund 5676 Brown University 1 Prospect Street Providence RI 02912 No Relationship PC Support for applied mathematics education and research through Brown University Applied Mathematics Discretionary Fund 22061 83737 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 3172 0 0 14 1686 0 0 0 0 0 0 0 0 0 0 486210 386 0 0 0 1 409119 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 386 413977 0 414363 false false false false false false false false false false X X 1 Yuhang Tang 221 Whitney Ct WALNUT CREEK CA 94598 272534 X X 2 Yinjia Zhang 221 Whitney Ct WALNUT CREEK CA 94598 77601 X X 1 NVDA stock lots: 500@130.08; 530@135.55; 450@177.59; 78@185.97; 222@185.74 272534 2025-09-30 2 GOOG 78 shares 181.3100 GOOG 97 shares 181.3100 GOOG 253 shares 181.3100 77601 2025-07-11 CPA fee 1644 1644 0 0 Public traded securities - ETFs and mutual funds 2025-01 Purchase 2025-12 Public traded securities ETFs and mutual funds 97577 96485 0 0 Enterprise Products Partners L.P., 10/1, 10/10, 10/14 purchased 2025-10 Purchase 2025-12 Enterprise Products Partners LP 10 1 10 10 10 14 purchased 25491 24775 0 0 Energy Transfer LP units / ET PTP units 2025-10 Purchase 2025-10 Energy Transfer LP units ET PTP units 16725 17030 0 0 Publicly Traded Stocks (NVDA, GOOG) 2025-01 Donations 2025-12 Publicly Traded Stocks NVDA GOOG 487720 401709 0 0 Publicly Traded Security - Common & Preferred Stock like GOOG NVDA 215549 215549 Publicly Traded Security - Mutual Fund Share like SPY SGOV FMV 336941 336941 JustAsk website to ask some legal questions 98 0 0 0 Credit card overpayment 0 875 875 Unrealized Gain Loss - Year-end FMV Adjustment 16839 Phone 150 50 0 50 Shipping & Postage 20 20 0 0 Software & apps 526 263 0 0 Office supplies 442 147 0 147 PTP Ordinary Gain UBTI for EPD 1987 0 0 Partnership Operating Loss K-1 for EPD -1597 0 0 Net section 1231 gain loss -4 0 0 Rounding 1 Foundation expenses paid by directors 12888 6639 Yinjia Zhang 221 Whitney Ct Walnut Creek CA 94598 California DOJ CT registration filing fee 155 155 0 0