Light Street Capital Management LLC
The positions Light Street Capital Management LLC reported on its Form 13F for Q2 2026, the quarter ending 30 Jun 2026, filed on 14 Aug 2026. Every figure below is the filing’s own: US-listed long equity, valued at the quarter end, with the change measured against the same manager’s previous filing.
Opened this quarter
A new position is the clearest thing a filing says. Somebody argued for it recently, and it is the easiest question to be ready for.
- Astera Labs Inc (ALAB)$61m · 6.7%
- Toast Inc (TOST)$33m · 3.6%
- Reddit Inc (RDDT)$32m · 3.5%
- Mercadolibre Inc (MELI)$22m · 2.4%
- Snowflake Inc (SNOW)$18m · 2.0%
- Mongodb Inc (MDB)$17m · 1.9%
- Roundhill ETF Trust$8.9m · 1.0%
- Quantinuum Inc (QNT)$2.9m · 0.3%
Sold out of this quarter
Exits are valued at what the position was worth in the previous filing, because by this one it is gone.
- Bill Holdings Inc (BILL)$24m held before
- Samsara Inc (IOT)$12m held before
- Lumentum HLDGS Inc$2.0m held before
- Amplitude Inc (AMPL)$2.0m held before
Every reported position, Q2 2026
28 positions, sorted by weight
| Position | Weight ↓ | Value | Shares | Change on the quarter | Action |
|---|---|---|---|---|---|
Taiwan Semiconductor Manufac SPONSORED ADS · CUSIP 874039100 | 12% | $108m | 225,949 | +$31m -1,636 shares | Trimmed |
Advanced Micro Devices Inc (AMD) COM · CUSIP 007903107 | 7.0% | $64m | 109,500 | +$19m -109,751 shares | Trimmed |
Astera Labs Inc (ALAB) COM · CUSIP 04626A103 | 6.7% | $61m | 125,750 | No earlier filing | New |
Gitlab Inc (GTLB) CLASS A COM · CUSIP 37637K108 | 6.6% | $59m | 1,945,000 | +$34m +775,000 shares | Added |
Broadcom Inc (AVGO) COM · CUSIP 11135F101 | 6.4% | $58m | 153,250 | +$12m +3,450 shares | Added |
Taiwan Semiconductor Manufac SPONSORED ADS PUT · CUSIP 874039100 | 5.8% | $52m | 109,200 | +$15m 0 shares | Held |
Amkor Technology Inc (AMKR) COM · CUSIP 031652100 | 5.7% | $52m | 596,783 | +$33m +189,793 shares | Added |
Jfrog LTD (FROG) ORD SHS · CUSIP M6191J100 | 5.2% | $47m | 514,500 | +$20m -60,500 shares | Trimmed |
MKS Inc. (MKSI) COM · CUSIP 55306N104 | 5.1% | $46m | 103,800 | +$18m -18,464 shares | Trimmed |
Chime Finl Inc COM SHS CL A · CUSIP 16935C109 | 5.0% | $45m | 2,199,089 | +$6.1m +121,474 shares | Added |
Coupang Inc (CPNG) CL A · CUSIP 22266T109 | 3.9% | $35m | 2,025,000 | +$15m +973,043 shares | Added |
Toast Inc (TOST) CL A · CUSIP 888787108 | 3.6% | $33m | 1,167,500 | No earlier filing | New |
Reddit Inc (RDDT) CL A · CUSIP 75734B100 | 3.5% | $32m | 182,500 | No earlier filing | New |
Nvidia Corporation (NVDA) COM · CUSIP 67066G104 | 3.0% | $27m | 136,720 | -$20m -135,494 shares | Trimmed |
Bloom Energy Corp (BE) COM CL A · CUSIP 093712107 | 2.8% | $26m | 84,167 | +$19m +33,542 shares | Added |
Asml HLDG NV N Y REGISTRY SHS · CUSIP N07059210 | 2.4% | $22m | 10,957 | +$7.3m +11 shares | Added |
Mercadolibre Inc (MELI) COM · CUSIP 58733R102 | 2.4% | $22m | 12,750 | No earlier filing | New |
Cellebrite Di LTD (CLBT) ORDINARY SHARES · CUSIP M2197Q107 | 2.1% | $19m | 1,312,755 | +$10m +671,830 shares | Added |
Snowflake Inc (SNOW) COM SHS · CUSIP 833445109 | 2.0% | $18m | 70,000 | No earlier filing | New |
Mongodb Inc (MDB) CL A · CUSIP 60937P106 | 1.9% | $17m | 50,000 | No earlier filing | New |
Alphabet Inc CAP STK CL A · CUSIP 02079K305 | 1.7% | $15m | 42,650 | +$3.0m +150 shares | Added |
Amazon Com Inc (AMZN) COM · CUSIP 023135106 | 1.3% | $12m | 51,000 | -$14m -73,800 shares | Trimmed |
Datadog Inc (DDOG) CL A COM · CUSIP 23804L103 | 1.2% | $10m | 40,000 | +$5.7m 0 shares | Held |
Roundhill ETF Trust MEMORY ETF · CUSIP 77926X320 | 1.0% | $8.9m | 120,000 | No earlier filing | New |
NXP Semiconductors N V (NXPI) COM · CUSIP N6596X109 | 0.7% | $6.5m | 23,003 | +$1.4m -2,497 shares | Trimmed |
Analog Devices Inc (ADI) COM · CUSIP 032654105 | 0.5% | $4.2m | 10,523 | +$800k +23 shares | Added |
Quantinuum Inc (QNT) CL A COM · CUSIP 74768A104 | 0.3% | $2.9m | 35,242 | No earlier filing | New |
Gds Hldgs Ltd SPONSORED ADS · CUSIP 36165L108 | 0.2% | $2.2m | 71,790 | -$700k +148 shares | Added |
Every filing on file
| Quarter | Period end | Filed | Book | Positions | Top 10 | Filing |
|---|---|---|---|---|---|---|
| Q2 2026 | 30 Jun 2026 | 14 Aug 2026 | $903m | 28 | 65% | 13F-HR |
| Q1 2026 | 31 Mar 2026 | 15 May 2026 | $534m | 24 | 74% | 13F-HR |
| Q4 2025 | 31 Dec 2025 | 17 Feb 2026 | $650m | 24 | 76% | 13F-HR |
| Q3 2025 | 30 Sept 2025 | 14 Nov 2025 | $595m | 27 | 69% | 13F-HR |
| Q2 2025 | 30 Jun 2025 | 14 Aug 2025 | $490m | 26 | 74% | 13F-HR |
| Q1 2025 | 31 Mar 2025 | 15 May 2025 | $358m | 21 | 81% | 13F-HR |
| Q4 2024 | 31 Dec 2024 | 14 Feb 2025 | $545m | 30 | 66% | 13F-HR |
| Q3 2024 | 30 Sept 2024 | 14 Nov 2024 | $423m | 22 | 75% | 13F-HR |
Taking this into the room
Pick one name from the top of the book and one from the new positions, and know both properly: what the company earns, what it is priced at, and what has to be true for the position to work. That is a conversation. Reciting the whole table is not, and the interviewer wrote it.
A position sold out of is worth as much preparation as one opened. Ask what changed rather than asserting the fund was wrong, and be ready for the answer that the thesis played out and the money went somewhere better.
What this filing leaves out
A 13F covers US-listed long equity at one moment in time. Shorts, bonds, cash, private positions and non-US listings never appear, and options are reported in a form that will mislead you if you read them as a position. A long/short manager showing $8bn here may run a book several times that size.
The lag matters too. Positions are as at the quarter end and the filing arrives up to forty-five days later, so what you are reading is at least six weeks old and possibly four months. Phrase it as what the filing showed, not what the fund holds today.
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