AlphaYou
Lone Pine Capital LLC
Stephen Mandel
Return history
Last 4 years copying the filings
$100,000 would be $212,999
The same $100,000 in SPY would be $223,571.
Total return
+113%
Annualized (4Y CAGR)
+20.8%
vs SPY
−1.5 pts/yr
Moves a year
122
Avg hold
11.8 months
Across 17 filings, buying each one the day it became public. Best quarter +30.2%, worst -9.2%.
All time
+385% since Aug 2013
Fund size $16B today
Sep 2022 to Sep 2026, at least 90% of the book priced each quarter. Not audited fund performance. What this covers
Each quarter is priced from the date its SEC filing became public, not the quarter it describes, and weighted by position size. A 13F shows long US stock holdings only, so shorts, cash, options, and anything bought and sold between two filings are not in this line.
New NBIS and exited VST in Q2 2026.
$16.4B in this filing34 positions
Holdings as of Jun 30, 2026. Filed Aug 14, 2026.
- 1
NBISNebius Group N.V.7.19%
$1.2B - 4.3M sharesNEW - 2
ASMLAsml HLDG NV6.92%
$1.1B - 569K shares-13.1% - 3
STXSeagate Technology Hldngs 5.90%
$965.1M - 1.0M sharesNEW
What is missing
Top 10 concentration: 54%. This filing does not include cash, short positions, private investments, bonds, or many overseas holdings. Next filing due ~Nov 14, 2026.