| GOODWILL AND INTANGIBLE ASSETS, NET |
GOODWILL AND INTANGIBLE ASSETS, NET Goodwill The following table presents goodwill by reportable segment: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (in thousands) | | Index | | Analytics | | ESG and Climate | | All Other - Private Assets | | Total | | Goodwill at December 31, 2023 | | $ | 1,203,435 | | | $ | 290,976 | | | $ | 84,724 | | | $ | 1,308,557 | | | $ | 2,887,692 | | Acquisitions (1) | | — | | | 5,031 | | | (357) | | | (1,030) | | | 3,644 | | | Foreign exchange translation adjustment | | (291) | | | — | | | (347) | | | (179) | | | (817) | | | Goodwill at March 31, 2024 | | $ | 1,203,144 | | | $ | 296,007 | | | $ | 84,020 | | | $ | 1,307,348 | | | $ | 2,890,519 | | | | | | | | | | | | |
___________________________ (1)Reflects the impact of the acquisitions of Fabric, Trove and Burgiss. Intangible Assets, Net The following table presents the amount of amortization expense related to intangible assets by category for the periods indicated: | | | | | | | | | | | | | | | | | Three Months Ended
March 31, | | (in thousands) | | 2024 | | 2023 | | Amortization expense of acquired intangible assets | | $ | 25,267 | | | $ | 15,831 | | | Amortization expense of internally developed capitalized software | | 13,337 | | | 8,836 | | | Total amortization of intangible assets expense | | $ | 38,604 | | | $ | 24,667 | | | | | | |
The gross carrying and accumulated amortization amounts related to the Company’s intangible assets were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2024 | | | December 31, 2023 | | (in thousands) | | Gross intangible assets: | | Accumulated amortization: | | Net intangible assets: | | | Gross intangible assets: | | Accumulated amortization: | | Net intangible assets: | | | Customer relationships | | $ | 710,995 | | | $ | (349,868) | | | $ | 361,127 | | | | $ | 709,299 | | | $ | (340,248) | | | $ | 369,051 | | | | Proprietary data | | 452,207 | | | (74,675) | | | 377,532 | | | | 452,543 | | | (64,694) | | | 387,849 | | | | Acquired technology and software | | 238,285 | | | (188,492) | | | 49,793 | | | | 228,785 | | | (185,583) | | | 43,202 | | | | Trademarks | | 209,090 | | | (174,222) | | | 34,868 | | | | 209,090 | | | (171,715) | | | 37,375 | | | | Internally developed capitalized software | | 256,288 | | | (131,129) | | | 125,159 | | | | 237,060 | | | (118,303) | | | 118,757 | | | | Total | | $ | 1,866,865 | | | $ | (918,386) | | | $ | 948,479 | | | | $ | 1,836,777 | | | $ | (880,543) | | | $ | 956,234 | | | | | | | | | | | | | | | | | |
The following table presents the estimated amortization expense for the remainder of the year ending December 31, 2024 and succeeding years: | | | | | | | | | Years Ending December 31,
(in thousands) | | Amortization
Expense | | Remainder of 2024 | | $ | 119,766 | | | 2025 | | 134,968 | | | 2026 | | 99,687 | | | 2027 | | 71,025 | | | 2028 | | 66,577 | | | Thereafter | | 456,456 | | | Total | | $ | 948,479 | | | | |
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