5月8日，美国证券交易委员会(SEC)官网4月28日披露但斌掌舵的东方港湾旗下海外基金”Oriental Harbor Investment Fund”2026年一季度末的美股持仓数据。数据显示，2026年一季度末东方港湾共持有12只美股标的，持股市值合计11.33亿美元，折合人民币约为78亿元，相比2025年末约13.16亿美元的持股市值略有下降。
从SEC披露的数据来看，但斌组合的前十大持仓集中度高达97.56%，延续了高聚焦、高集中度的投资风格，且继续聚集在AI产业链。其第一、第二大重仓股依次仍为谷歌和英伟达，合计占比超50%。东方港湾一季度还对谷歌和英伟达均进行了小幅加仓，其中，对谷歌加仓的方式为新进买入27.71万股的谷歌-A，谷歌(A+C)合计占比37.53%，是英伟达的近2倍。此外，值得关注的是，东方港湾一季度新进买入了台积电、美光科技、CIRCLE INTERNET GROUP INC，清仓了微软、FNGU(三倍做多FANG+指数ETN)。
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