Whale Rock Capital Management LLC
Alex Sacerdote · Boston, MA · Founded 2006
Whale Rock Capital Management is a Boston-based global equity manager founded in 2006 by Alex Sacerdote, who runs it as chief executive and portfolio manager. The firm invests strictly in technology, media and telecom, running hedge, long-only and hybrid strategies out of Two International Place.
Sacerdote spent 1999 to 2006 at Fidelity Investments as an equity analyst and sector portfolio manager, mostly covering technology, before leaving to start Whale Rock. His stated framework is built on three things — S-curves, competitive advantages and underappreciated earnings power — applied to whichever platform shift is compounding at the time: cloud, mobile, and more recently the silicon and infrastructure layers underneath AI.
The public book is deliberately narrow. The June 2026 13F reports 35 positions worth $12.5 billion, concentrated in memory, optical and semiconductor-equipment names alongside a handful of large-cap platforms. The tables below cache Whale Rock's four most recent 13F filings; positions in companies R40 tracks are linked to their pages.
History
Works as an equity analyst and later sector portfolio manager, primarily covering technology, through 2006.
Launches the Boston firm as a global TMT specialist, the sector focus it has kept since inception.
Sacerdote lays out Whale Rock's framework for investing across the AI stack, from silicon through applications.
2026 Q2 holdings
| # | Company | Class | Value | Shares | % Port. | vs prior |
|---|---|---|---|---|---|---|
| 1 | SNDKSandisk Corporation★ | COM | $1.36B | 597K | 10.9% | TRIM |
| 2 | AMDAdvanced Micro Devices, Inc.★ | COM | $877.0M | 1.5M | 7.0% | ADD |
| 3 | GOOGLAlphabet Inc.★ | CAP STK CL A | $856.4M | 2.4M | 6.9% | TRIM |
| 4 | Ttm Technologies Inc | COM | $791.2M | 4.2M | 6.4% | ADD |
| 5 | Astera Labs Inc | COM | $757.3M | 1.6M | 6.1% | NEW |
| 6 | AMZNAmazon.com, Inc.★ | COM | $583.4M | 2.4M | 4.7% | ADD |
| 7 | GLWCorning Incorporated★ | COM | $570.6M | 2.2M | 4.6% | TRIM |
| 8 | Mks INC. | COM | $565.5M | 1.3M | 4.5% | TRIM |
| 9 | Celestica Inc | COM | $538.6M | 1.5M | 4.3% | TRIM |
| 10 | BEBloom Energy Corporation★ | COM CL A | $486.8M | 1.6M | 3.9% | TRIM |
| 11 | Coherent Corp | COM | $482.1M | 1.2M | 3.9% | ADD |
| 12 | Fabrinet | SHS | $418.6M | 745K | 3.4% | ADD |
| 13 | Sitime Corp | COM | $418.0M | 561K | 3.4% | TRIM |
| 14 | Jfrog Ltd | ORD SHS | $405.2M | 4.5M | 3.3% | TRIM |
| 15 | Macom Tech Solutions Hldgs I | COM | $376.1M | 989K | 3.0% | TRIM |
| 16 | Viavi Solutions Inc | COM | $328.3M | 6.9M | 2.6% | ADD |
| 17 | Lam Research Corp | COM NEW | $321.8M | 743K | 2.6% | TRIM |
| 18 | TSMTaiwan Semiconductor Manufacturing Company Limited★ | SPONSORED ADS | $281.7M | 590K | 2.3% | TRIM |
| 19 | CVNACarvana Co.★ | CL A | $280.9M | 4.3M | 2.3% | ADD |
| 20 | METAMeta Platforms, Inc.★ | CL A | $256.9M | 456K | 2.1% | TRIM |
| 21 | Western Digital Corp | COM | $255.9M | 401K | 2.1% | TRIM |
| 22 | Applovin Corp | COM CL A | $237.8M | 462K | 1.9% | TRIM |
| 23 | SNOWSnowflake Inc.★ | COM SHS | $225.2M | 885K | 1.8% | NEW |
| 24 | Twilio Inc | CL A | $169.6M | 822K | 1.4% | NEW |
| 25 | Seagate Technology Hldngs Pl | ORD SHS | $143.3M | 149K | 1.2% | NEW |
| 26 | Klaviyo Inc | COM SER A | $83.5M | 5.5M | 0.7% | TRIM |
| 27 | NVDANVIDIA Corporation★ | COM | $75.5M | 377K | 0.6% | TRIM |
| 28 | MDBMongoDB, Inc.★ | CL A | $75.5M | 225K | 0.6% | HOLD |
| 29 | Impinj Inc | COM | $58.0M | 405K | 0.5% | HOLD |
| 30 | Duolingo Inc | CL A COM | $54.3M | 472K | 0.4% | HOLD |
| 31 | INTCIntel Corporation★ | COM | $36.3M | 260K | 0.3% | NEW |
| 32 | AAPLApple Inc.★ | COM | $28.9M | 100K | 0.2% | ADD |
| 33 | SPCXSpaceX★ | CLASS A COM STK | $26.1M | 153K | 0.2% | NEW |
| 34 | AVGOBroadcom Inc.★ | COM | $22.6M | 60K | 0.2% | TRIM |
| 35 | CBRSCerebras Systems Inc.★ | COM CL A | $11.2M | 51K | 0.1% | NEW |
Notable 2026 Q2 moves
New positions
- Astera Labs Inc $757.3M
- SNOW Snowflake Inc. $225.2M
- Twilio Inc $169.6M
- Seagate Technology Hldngs Pl $143.3M
- INTC Intel Corporation $36.3M
- SPCX SpaceX $26.1M
- CBRS Cerebras Systems Inc. $11.2M
Exited
- Advanced Energy Inds was $329.8M
- Roblox Corp was $199.8M
- Tower Semiconductor Ltd was $187.2M
- Ciena Corp was $89.8M
- Arm Holdings Plc was $68.4M
- MSFT Microsoft Corporation was $19.9M
- NFLX Netflix, Inc. was $12.7M
Position history in tracked names
Quarter-end value of each holding that has a page on R40, most recent first.
| Stock | 2026 Q2 | 2026 Q1 | 2025 Q4 | 2025 Q3 |
|---|---|---|---|---|
| SNDKSandisk Corp | $1.36B | $508.0M | $238.2M | — |
| AMDAdvanced Micro Devices Inc | $877.0M | $14.1M | — | — |
| GOOGLAlphabet Inc | $856.4M | $768.3M | $657.6M | $284.5M |
| AMZNAmazon Com Inc | $583.4M | $378.9M | $428.8M | $317.8M |
| GLWCorning Inc | $570.6M | $312.4M | $233.8M | $215.1M |
| BEBloom Energy Corp | $486.8M | $224.1M | $116.4M | $395.9M |
| TSMTaiwan Semiconductor Manufac | $281.7M | $276.9M | $180.2M | $203.0M |
| CVNACarvana Co | $280.9M | $275.9M | $451.9M | $214.2M |
| METAMeta Platforms Inc | $256.9M | $293.3M | $310.1M | $536.0M |
| SNOWSnowflake Inc | $225.2M | — | — | — |
| NVDANvidia Corporation | $75.5M | $181.6M | $224.1M | $594.5M |
| MDBMongodb Inc | $75.5M | $55.0M | $251.8M | $171.4M |
| INTCIntel Corp | $36.3M | — | — | — |
| AAPLApple Inc | $28.9M | $24.5M | — | — |
| SPCXSpace Exploration Techn Corp | $26.1M | — | — | — |
| AVGOBroadcom Inc | $22.6M | $228.2M | $357.1M | $472.1M |
| CBRSCerebras Systems Inc | $11.2M | — | — | — |
| SHOPShopify Inc | — | — | — | $113.8M |
| VRTVertiv Holdings Co | — | — | — | $96.5M |
| OKTAOkta Inc | — | — | $37.6M | $39.9M |
| MSFTMicrosoft Corp | — | $19.9M | — | $155.6M |
| NFLXNetflix INC. | — | $12.7M | — | $276.6M |