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Related Party Transactions | 12 Months Ended
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Dec. 31, 2025
Related Party Transactions |
Related Party Transactions | 10. Related Party Transactions The following sets forth significant related parties and their relationships with the Company: ​
​ | ​ | ​
Company Name | ​ ​ ​ | Relationship with the Company
SINA |  | Parent and affiliates under common control.
​ | ​ | ​
Alibaba |  | Strategic partner and significant shareholder of the Company.
​ During the years ended December 31, 2023, 2024 and 2025, the Group entered in to a series of one-year loan agreements with SINA pursuant to which SINA is entitled to borrow from the Group to facilitate SINA’s business operations. SINA has withdrawn a total of US$1,105.7 million, US$966.6 million and US$753.0 million from the Group and repaid US$1,071.1 million, US$970.9 million and US$773.5 million to the Group during the years ended December 31, 2023, 2024 and 2025, respectively. As of December 31, 2024 and 2025, the loans to and interest receivable from SINA were US$417.7 million and US$401.9 million, respectively. The following sets forth significant related party transactions with the Group: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ ​ ​ | 2023 | ​ ​ ​ | 2024 | ​ ​ ​ | 2025
​ | ​ | (In US$ thousands)
Transactions with SINA | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenue billed through SINA | ​ | $ | 41,557 | ​ | $ | 26,758 | ​ | $ | 22,816
Revenue from services provided to SINA | ​ | ​ | 25,253 | ​ | ​ | 19,872 | ​ | ​ | 13,304
Total | ​ | $ | 66,810 | ​ | $ | 46,630 | ​ | $ | 36,120
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Costs and expenses allocated from SINA(1) | ​ | $ | 36,483 | ​ | $ | 33,157 | ​ | $ | 31,724
Interest income on loans to SINA | ​ | $ | 14,913 | ​ | $ | 13,070 | ​ | $ | 10,847
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Transactions with Alibaba | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Advertising and marketing revenues from Alibaba | ​ | $ | 111,608 | ​ | $ | 116,785 | ​ | $ | 173,834
Services provided by Alibaba | ​ | $ | 23,366 | ​ | $ | 22,521 | ​ | $ | 29,639
(1) | Costs and expenses allocated from SINA represented the charges for certain services provided by SINA or SINA’s affiliates and charged to the Group using actual cost allocation based on proportional utilization (Note 1). In addition to the allocated costs and expenses, SINA also billed US$24.9 million,US $38.5 million and US$25.5 million for other costs and expenses incurred by Weibo but paid by SINA for the years ended December 31, 2023, 2024 and 2025, respectively. During the years ended December 31, 2023, 2024 and 2025, Weibo allocated US$9.9 million, US$8.6 million and US$8.1 million to SINA for costs and expenses related to certain of SINA’s activities for which Weibo made the payments, respectively.
The following table sets forth the details of the revenues from SINA by advertising and marketing revenues and value-added services revenues for the periods specified. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | Year Ended December 31,
​ | ​ ​ ​ | 2023 | ​ ​ ​ | 2024 | ​ ​ ​ | 2025
​ | ​ | (In US$ thousands)
Transactions with SINA | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Advertising and marketing revenues | ​ | $ | 45,319 | ​ | $ | 25,022 | ​ | $ | 14,311
Value-added services revenues | ​ | ​ | 21,491 | ​ | ​ | 21,608 | ​ | ​ | 21,809
Total | ​ | $ | 66,810 | ​ | $ | 46,630 | ​ | $ | 36,120
​ ​ 10. Related Party Transactions (Continued) The following sets forth related party outstanding balance: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ | ​ ​ ​ | 2024 | ​ ​ ​ | 2025
​ | ​ | ​ | (In US$ thousands)
Amount due from SINA(2) | ​ | $ | 452,769 |  | $ | 441,143
Accounts receivable due from Alibaba |  | $ | 43,495 |  | $ | 45,812
​ | ​ | ​ | ​ | ​ | ​ | ​
Loans to and interest receivable from other related parties(3) (4) | ​ | ​ | ​ | ​ | ​ | ​
-Company A (an investee providing online brokerage services) | ​ | $ | 88,500 | ​ | $ | 88,500
-Others | ​ | ​ | — | ​ | ​ | 17,158
Subtotal (included in prepaid expenses and other current assets) | ​ | ​ | 88,500 | ​ | ​ | 105,658
​ | ​ | ​ | ​ | ​ | ​ | ​
-Company B (an investee in real estate business) | ​ | ​ | 358,485 | ​ | ​ | 408,281
-Others | ​ | ​ | — | ​ | ​ | 30,189
Subtotal (included in other non-current assets) | ​ | ​ | 358,485 | ​ | ​ | 438,470
Total | ​ | $ | 446,985 | ​ | $ | 544,128
(2) | The Group uses amount due from/to SINA to settle balances arising from costs and expenses allocated from SINA based on proportional utilization, other expenditures incurred by Weibo business but paid by SINA, transactions with third-party customers and suppliers settled through SINA, as well as business transactions between Weibo and SINA. As of December 31, 2024 and 2025, the amount due from SINA also included loans to and interest receivable from SINA of US$417.7 million and US$401.9 million at an annual interest rate ranging from 1% to 4% of maturity within one year, respectively, which are non-trade in nature.
(3) | The annual interest rates of the loans were ranging from 1.0% to 6.0% as of December 31, 2025. These balances are non-trade in nature. The contractual terms of the loans were up to 5 years while subject to extension and the Group will determine the liquidity (current versus non-current) of the loans pursuant to the expected cash collection.
(4) | The Group estimates the allowance for credit losses on loans and interest receivables not sharing similar risk characteristic on an individual basis. The key factors considered when determining the above allowances for credit losses include the fair value of the assets held by the borrowers. For the years ended December 31, 2023, 2024 and 2025, the Group reversed US$2.1 million, recognized US$1.5 million and nil credit losses on loans to and interest receivable from other related parties based on the expected collection schedule of these loans, respectively.
Other related parties mainly include investee companies on which SINA or Weibo has significant influence. These investees are generally high-tech companies operating in different internet-related business. For the years ended December 31, 2023, 2024 and 2025, the Group recognized US$32.7 million, US$41.8 million and US$24.2 million of advertising and marketing revenues, US$2.7 million, US$3.3 million and US$3.2 million of value-added services revenues, and US$33.9 million, US$32.8 million and US$31.6 million of costs and expenses from other related parties, respectively. As of December 31, 2024 and 2025, other related parties accounted for outstanding balances of net accounts receivable of US$39.6 million and US$39.7 million, accounts payable of US$25.0 million and US$30.8 million, and accrued and other liabilities of US$5.6 million and US$5.3 million, respectively.

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(e)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/850/tableOfContent Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-6 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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