Buffalo funds
Our archive holds 14 letters from Buffalo funds, behind 14 investment theses and positions in 105 companies. Every quote below is copied verbatim from the letter it came from.
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14 strategies
Buffalo funds publishes a letter per strategy. Each one has its own page — what it holds, what it bought, what it wrote.
- Buffalo Blue Chip Growth Fund1
US Mega-cap Growth · 17 companies
- Buffalo funds Blue Chip Growth Fund1
26 companies
- Buffalo Funds Growth Fund1
12 companies
- Buffalo funds High Yield Fund1
5 companies
- Buffalo funds International Fund1
13 companies
- Buffalo funds Mid Cap Discovery Fund1
16 companies
- Buffalo funds Mid Cap Growth Fund1
10 companies
- Buffalo funds Small Cap Growth Fund1
11 companies
- Buffalo Growth Fund1
US Mega-cap Growth · 14 companies
- Buffalo High Yield Fund1
Income · 9 companies
- Buffalo International Fund1
International Mega-cap · 13 companies
- Buffalo Mid Cap Discovery Fund1
Mid-cap Growth · 6 companies
- Buffalo Mid Cap Growth Fund1
Mid-cap Growth · 4 companies
- Buffalo Small Cap Growth Fund1
Small-cap Growth · 14 companies
What they bought and sold · 16 moves
- TrimmedMicrosoft CorporationJune 2026
“Although we have trimmed shares back a bit, the fund remains significantly overweight those four positions.”
Read the letter - ExitedDye & DurhamJune 2026
“The fund no longer holds the Embecta or Dye & Durham corporate bonds.”
Read the letter - TrimmedEquifax Inc.June 2026
“This incremental regulatory risk caused us to moderate the investment position size, but we retained exposure to the company.”
Read the letter - New positionSpotify Technology S.A.June 2026
“We initiated an investment position in Spotify during the quarter following the company’s investor day in late May.”
Read the letter - TrimmedPalo Alto Networks, Inc.June 2026
“We trimmed the investment slightly after the close of the quarter but continued to maintain a large position in Palo Alto Networks.”
Read the letter - TrimmedAmazon.com, Inc.June 2026
“Although we have trimmed shares back a bit, the fund remains significantly overweight those four positions.”
Read the letter - June 2026
“We eliminated the investment in the quarter as the stock exceeded our view of fair value and believe better risk-reward opportunities exist within Semiconductors.”
Read the letter - ExitedEmbectaJune 2026
“The fund no longer holds the Embecta or Dye & Durham corporate bonds.”
Read the letter - ExitedOption Care Health, Inc.June 2026
“We have since exited the position.”
Read the letter - ExitedProcore TechnologiesJune 2026
“We chose to close our position in the quarter and continued the process of repositioning software weight to the most durable competitive positions and clearest AI beneficiaries we can identify.”
Read the letter - TrimmedMeta Platforms, Inc.June 2026
“Although we have trimmed shares back a bit, the fund remains significantly overweight those four positions.”
Read the letter - TrimmedSLB LimitedMarch 2026
“We realized partial gains in the position, believing the supply shock in the energy market is transitory.”
Read the letter - TrimmedCostco Wholesale CorporationMarch 2026
“Relative results were partially offset by Lam Research, KLA, and Costco Wholesale.”
Read the letter - TrimmedLam Research CorporationMarch 2026
“Relative results were partially offset by Lam Research, KLA, and Costco Wholesale.”
Read the letter - ExitedGartner Inc.March 2026
“We exited the position, drawing a clear line between businesses where AI genuinely threatens the revenue model and those we see as unfairly punished by indiscriminate selling.”
Read the letter - TrimmedKLA CorporationMarch 2026
“Relative results were partially offset by Lam Research, KLA, and Costco Wholesale.”
Read the letter
Companies held · 105
Every company Buffalo funds has disclosed a position in across our archive, with the letter that last mentioned it.
- Advanced Drainage Systems, Inc.Jun 2026
- Advanced Micro Devices, Inc.Jun 2026
- AdyenMar 2026
- Alphabet, Inc.Mar 2026
- Amazon.com, Inc.Jun 2026
- AMETEK, Inc.Jun 2026
- APA CorporationJun 2026
- Apple, Inc.Jun 2026
- Applied Materials, Inc.Jun 2026
- ASML Holding N.V.Jun 2026
- ASML Holding NVJun 2026
- AstraZeneca PLCJun 2026
- BAE Systems plcJun 2026
- BayCurrent, Inc.Mar 2026
- Booking Holdings, Inc.Mar 2026
- Broadcom, Inc.Jun 2026
- Burford Capital LimitedMar 2026
- Cactus, Inc.Jun 2026
- Castle Biosciences, Inc.Mar 2026
- Cencora, Inc.Jun 2026
- Champion Homes, Inc.Mar 2026
- Clearwater Analytics Holdings, Inc.Mar 2026
- Cloudflare, Inc.Jun 2026
- Comfort Systems USA, Inc.Jun 2026
- Corcept Therapeutics IncorporatedJun 2026
- Corning IncorporatedJun 2026
- CoStar Group, Inc.Mar 2026
- Costco Wholesale CorporationMar 2026
- Credo Technology Group Holding Ltd.Jun 2026
- Crescent Energy CompanyMar 2026
- Disco CorpJun 2026
- Eli Lilly and CompanyJun 2026
- EmbectaJun 2026
- Equifax Inc.Jun 2026
- ESCO Technologies, Inc.Jun 2026
- Exxon Mobil CorporationJun 2026
- FormFactor, Inc.Jun 2026
- Fresenius SE & Co.Mar 2026
- Gartner Inc.Mar 2026
- Grupo AeromexicoMar 2026
- Harrow, Inc.Jun 2026
- Hilton Worldwide Holdings, Inc.Jun 2026
- Honeywell International Inc.Jun 2026
- Intuitive Surgical, Inc.Jun 2026
- JBT Marel CorpJun 2026
- KLA CorporationMar 2026
- Kratos Defense & Security Solutions, Inc.Jun 2026
- Lam Research CorporationMar 2026
- Leonardo DRS, Inc.Jun 2026
- Liberty Live HoldingsMar 2026
- Ligand Pharmaceuticals, Inc.Jun 2026
- Linde plcMar 2026
- Lonza Group AGJun 2026
- Mastercard Inc.Jun 2026
- MercadoLibre IncJun 2026
- Meta Platforms, Inc.Jun 2026
- Micron Technology, Inc.Jun 2026
- Microsoft CorporationJun 2026
- Mirum PharmaceuticalsJun 2026
- MSCI, Inc.Jun 2026
- MYR Group, Inc.Jun 2026
- Netflix, Inc.Jun 2026
- Nintendo Co LtdJun 2026
- Northern Oil And Gas, Inc.Mar 2026
- NVIDIA CorporationJun 2026
- ON Semiconductor CorporationJun 2026
- Onto Innovation Inc.Jun 2026
- Option Care Health, Inc.Jun 2026
- Palo Alto Networks, Inc.Jun 2026
- Palomar Holdings, Inc.Jun 2026
- Procore TechnologiesJun 2026
- Progyny Inc.Jun 2026
- R.R. Donnelley & Sons Co.Jun 2026
- Rheinmetall AGJun 2026
- Samsung Electronics Co LtdJun 2026
- SanDisk CorporationJun 2026
- SAPMar 2026
- Saturn Oil & Gas Inc.Jun 2026
- Schneider Electric SEJun 2026
- Seagate Technology Holdings plcJun 2026
- Shell plcJun 2026
- Shift4 Payments, Inc.Mar 2026
- Siemens AGJun 2026
- Siemens AktiengesellschaftMar 2026
- Silicon Laboratories, Inc.Jun 2026
- SiTime CorporationJun 2026
- SK hynix IncJun 2026
- Skywater Technologies, Inc.Mar 2026
- SLB LimitedMar 2026
- Spotify Technology S.A.Jun 2026
- Stevanato Group SpAJun 2026
- Stride, Inc.Mar 2026
- Taiwan Semiconductor Manufacturing CoJun 2026
- Teradyne, Inc.Jun 2026
- Tesla, Inc.Mar 2026
- The Geo Group, Inc.Mar 2026
- Tyler Technologies, Inc.Jun 2026
- Uber Technologies, Inc.Jun 2026
- Veeva Systems, Inc.Jun 2026
- Verisk Analytics, Inc.Jun 2026
- Vertiv Holdings Co.Jun 2026
- Visa, Inc.Jun 2026
- Vistra Corp.Jun 2026
- Western Digital CorporationJun 2026
- WisdomTree, Inc.Jun 2026
Theses · 14
- SK hynix IncJune 2026
SK hynix Inc is a memory-chip maker benefiting from AI-driven demand, especially its leadership in customized HBM.
Read the full thesis - Schneider Electric SEJune 2026
Schneider Electric SE is an electrification and industrial technology company held for its exposure to secular trends, strong free cash flow, and competitive advantages.
Read the full thesis - ASML Holding NVJune 2026
ASML Holding NV is a semiconductor equipment leader held for its exposure to AI-related secular growth, competitive advantages, and strong cash generation.
Read the full thesis - AstraZeneca PLCJune 2026
AstraZeneca PLC is a pharmaceutical company held for its secular growth profile, strong free cash flow, and management focus on returns above cost of capital.
Read the full thesis - Lonza Group AGJune 2026
Lonza Group AG is a life-sciences manufacturing company held for its secular growth trends, strong free cash flow, and value-creating management.
Read the full thesis - June 2026
MercadoLibre Inc is an e-commerce and fintech platform held for secular growth, competitive advantages, and strong free cash flow.
Read the full thesis - Siemens AGJune 2026
Siemens AG is an industrial technology company held for secular growth exposure, competitive advantages, and strong free cash flow.
Read the full thesis - Disco CorporationJune 2026
Disco Corporation is a semiconductor equipment company held for secular growth, competitive advantages, and strong free cash flow.
Read the full thesis - June 2026
Progyny provides fertility benefits management for employers and is supported by best-in-class outcomes, an asset-light model, cash generation, and repurchases.
Read the full thesis - June 2026
Palo Alto Networks benefits from higher attach rates driven by AI, with incumbents favored over costly AI-native security entrants.
Read the full thesis - March 2026
Vertiv Holdings provides critical data center infrastructure and is positioned to benefit from accelerating AI-driven capex and structural undersupply in power and cooling.
Read the full thesis - March 2026
Veeva Systems sells validated cloud software for life sciences and benefits from mission-critical workflows, switching costs, and potential AI-driven market expansion.
Read the full thesis
- SK Hynix, Inc.Mar 2026
- SamsungMar 2026
Letter archive · 14
2026
- Jun 2026Buffalo funds International Fund
- Jun 2026Buffalo funds Mid Cap Growth Fund
- Jun 2026Buffalo funds Small Cap Growth Fund
- Jun 2026Buffalo funds Blue Chip Growth Fund
- Jun 2026Buffalo Funds Growth Fund
- Jun 2026Buffalo funds High Yield Fund
- Jun 2026Buffalo funds Mid Cap Discovery Fund
- Mar 2026Buffalo Small Cap Growth Fund
- Mar 2026Buffalo Mid Cap Growth Fund
- Mar 2026Buffalo Mid Cap Discovery Fund
- Mar 2026Buffalo International Fund
- Mar 2026Buffalo High Yield Fund
- Mar 2026Buffalo Growth Fund
- Mar 2026Buffalo Blue Chip Growth Fund
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