# Granahan Investment Management LLC > Granahan Investment Management LLC is an SEC-registered investment advisory firm in Waltham, MA, registered since 1985, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated March 26, 2026. - CRD: 107745 - Filed as: GRANAHAN INVESTMENT MANAGEMENT LLC - Registration: SEC-registered investment adviser (status as filed: Approved) - Location: Waltham, MA - Filing period: October 2026 - Form ADV filing dated: March 26, 2026 - SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/107745 - AdvisorCensus page: https://advisorcensus.com/firm/granahan-investment-management-llc-waltham-ma-107745 ## Quick answers **How is Granahan Investment Management LLC compensated?** On its Form ADV (Item 5.E, October 2026), Granahan Investment Management LLC reports these compensation arrangements: a percentage of assets under its management; performance-based fees. The amounts are in Item 5 of its Form ADV Part 2A brochure. **Where is Granahan Investment Management LLC located?** Granahan Investment Management LLC's principal office is in Waltham, MA, according to its Form ADV. **Is Granahan Investment Management LLC registered with the SEC or a state?** Granahan Investment Management LLC is an SEC-registered investment advisory firm, registered since 1985. Status as filed: Approved. CRD 107745. **How much does Granahan Investment Management LLC manage?** Granahan Investment Management LLC reports $2,362,974,589 in regulatory assets under management in its Form ADV filing dated March 26, 2026 (100% discretionary). **How have Granahan Investment Management LLC's assets and staff changed since 2021?** In the Form ADV data for Granahan Investment Management LLC: Regulatory assets under management: $4,574,651,316 in the October 2021 data and $2,362,974,589 in the October 2026 data, down 48%. Total employees: 18 in October 2021 and 20 in October 2026. Assets under management move with markets as well as with clients coming and going. **What types of clients does Granahan Investment Management LLC serve?** By number of clients on Form ADV Item 5.D: high net worth individuals (43); corporations or other businesses not listed above (11); charitable organizations (9). **Which custodians does Granahan Investment Management LLC use?** Granahan Investment Management LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Caceis Bank Ireland Branch, HSBC Bank PLC and JP Morgan as custodians holding 10% or more of its separately managed account assets. **Does Granahan Investment Management LLC report any disciplinary disclosures?** Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/107745 **What changed in Granahan Investment Management LLC's recent Form ADV filings?** In the April 2026 filing data: Employees performing advisory functions went from 9 to 8. ## From the Form ADV filing ### Compensation (Item 5.E) - A percentage of assets under your management - Performance-based fees ### Custodians (Schedule D, Section 5.K(3)) - Caceis Bank Ireland Branch - HSBC Bank PLC - JP Morgan Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian. ### Regulatory assets under management (Item 5.F) - Total: $2,362,974,589 - Discretionary: $2,362,974,589 - Non-discretionary: $0 ### Clients (Item 5.D) | Client type | Clients | Assets | | --- | --- | --- | | Individuals (other than high net worth individuals) | 0 | $0 | | High net worth individuals | 43 | $84,285,505 | | Banking or thrift institutions | 0 | $0 | | Investment companies | 3 | $533,397,446 | | Business development companies | 0 | $0 | | Pooled investment vehicles (other than investment companies and business development companies) | 3 | $841,372,216 | | Pension and profit sharing plans (but not the plan participants or government pension plans) | 2 | $58,513,864 | | Charitable organizations | 9 | $294,716,695 | | State or municipal government entities (including government pension plans) | 3 | $315,265,949 | | Other investment advisers | 0 | $0 | | Insurance companies | 0 | $0 | | Sovereign wealth funds and foreign official institutions | 0 | $0 | | Corporations or other businesses not listed above | 11 | $235,422,914 | | Other | 0 | $0 | ### Advisory services (Item 5.G) - Portfolio management for individuals and/or small businesses - Portfolio management for investment companies (and business development companies) - Portfolio management for pooled investment vehicles (other than investment companies) - Portfolio management for businesses (other than small businesses) or institutional clients ### Firm details - Registered since: 1985 (41 years) - Employees: 20 total, 8 performing advisory functions - Wrap fee program participation: No - States registered or notice-filed: CA, DE, MA, NH, OR, VT, WI - Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11. ### Websites listed on Form ADV (Item 1.I) - granahan.com - LinkedIn @granahan-investment-management-inc. ## Assets and staff over time | Data period | Regulatory assets under management | Employees | Filing dated | | --- | --- | --- | --- | | October 2021 | $4,574,651,316 | 18 | June 1, 2021 | | October 2022 | $4,968,486,424 | 19 | March 28, 2022 | | October 2023 | $3,326,814,170 | 19 | October 2, 2023 | | October 2024 | $3,098,868,810 | 20 | March 26, 2024 | | October 2025 | $2,451,572,049 | 20 | March 20, 2025 | | October 2026 | $2,362,974,589 | 20 | March 26, 2026 | Regulatory assets under management: $4,574,651,316 in the October 2021 data and $2,362,974,589 in the October 2026 data, down 48%. Total employees: 18 in October 2021 and 20 in October 2026. ## Changes in the filing (last 12 months) ### April 2026 - Employees performing advisory functions went from 9 to 8. ## Source Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Granahan Investment Management LLC (CRD 107745): Form ADV filing data as of October 2026.