Berkshire doubled down on Alphabet. Tiger and Bridgewater trimmed AI.

Form 13F shows the US stock positions of large money managers at the end of each quarter, filed up to 45 days later. It is old news by design, but it is official, and comparing two consecutive filings shows direction. We parsed the XML information tables for five managers and tracked share counts in NVIDIA, Microsoft, Alphabet (both share classes combined), Amazon, Meta, Broadcom, Taiwan Semiconductor, Micron, AMD and Palantir.

Berkshire Hathaway: Alphabet nearly doubled

Berkshire's June 30, 2026 filing, which covers Berkshire and its affiliated managers, lists 105,979,600 Alphabet shares across Class A and Class C, up from 57,835,013 on March 31. Reported value: $37.76 billion, or 12.6% of the $299.25 billion total reported in the filing nContext: n=Berkshire 13F line items · as of Jun 30, 2026 · Form 13F-HR, accession 0001193125-26-352200 · margin: not applicable, reported values. Alphabet's own second-quarter release, filed on July 22, credited Google Cloud revenue growth of 82%, to $24.8 billion from $13.6 billion a year earlier nContext: n=1 company segment · Q2 2026 vs Q2 2025 · Alphabet Form 8-K, Exhibit 99.1 · margin: not applicable, reported figures, to demand for AI infrastructure and AI solutions.

Tiger Global: trimming, but still AI-heavy

Tiger Global's filing totals $23.98 billion. Its four largest positions are Taiwan Semiconductor ($2.33 billion), Amazon ($2.31 billion), NVIDIA ($2.24 billion) and Alphabet ($2.07 billion). Share counts fell in most AI megacaps: Alphabet to 5,805,687 from 10,631,402, Broadcom to 1,754,062 from 3,584,814, NVIDIA to 11,198,773 from 12,011,752. Tiger opened positions in AMD (674,727 shares) and Cerebras Systems (2,999,000 shares, $662.8 million).

Coatue: from software to semis and memory

Coatue's reported value rose to $48.63 billion from $29.06 billion. Its top holdings are Taiwan Semiconductor ($4.26 billion), Lam Research ($4.09 billion) and Micron ($3.63 billion). Micron went from 165,931 shares to 3,142,269. Coatue also added Amazon (11,834,799 shares from 7,930,766) and reported new positions in Intel and Cerebras.

Bridgewater: broad cuts

Bridgewater, whose 13F lists 997 line items, cut nearly every AI name it held. Amazon fell to 2,025,481 shares from 4,388,711, Micron to 116,666 from 1,475,704, Taiwan Semiconductor to 34,525 from 1,077,079, and its Palantir and CoreWeave positions went to zero. NVIDIA, at 3,866,195 shares, remained its largest AI holding at $773.6 million.

Renaissance Technologies: the quant added

Renaissance, the quantitative firm, moved the other way. NVIDIA rose to 7,091,256 shares from 2,526,948, Meta to 2,023,153 from 253,373, and Alphabet to 3,893,253 from 743,473. It cut Micron to 211,580 shares from 2,162,986. A quant fund's book can turn over quickly, so a quarter-end snapshot says little about its positioning weeks later.

How to read it

These are snapshots of June 30. They exclude short positions and most derivatives beyond listed options, and they cover only US-listed securities. The managers may have traded since. What the filings do show is that the AI trade was not one-way among large investors in the second quarter: a value investor and a quant added to AI megacaps while a macro fund and a growth fund trimmed.