Year Ended December 31,

2023

2024

2025

(In US$ thousands, except share data and per share data)

Basic net income per share calculation:

Numerator:

Net income attributable to Weibo’s shareholders

$

342,598

$

300,801

$

449,020

Denominator:

Weighted average ordinary shares outstanding

235,560

237,324

238,787

Basic net income per share attributable to Weibo’s shareholders

$

1.45

$

1.27

$

1.88

Diluted net income per share calculation:

Numerator:

Net income attributable to Weibo

$

342,598

$

300,801

$

449,020

Add: Effect on interest expenses and amortized issuance cost of convertible senior notes

529

7,713

7,676

Net income attributable to Weibo’s shareholders for calculating diluted net income per share

343,127

308,514

456,696

Denominator:

Weighted average ordinary shares outstanding

235,560

237,324

238,787

Effects of dilutive securities

Stock options

14

218

762

Unvested restricted share units

2,625

1,965

355

Convertible senior notes

1,775

25,734

28,656

Shares used in computing diluted net income per share attributable to Weibo’s shareholders

239,974

265,241

268,560

Diluted net income per share attributable to Weibo’s shareholders

$

1.43

$

1.16

$

1.70