GI
Granahan Investment Management, LLC — 13F Portfolio Report & Top Holdings (Q2 2026)
Granahan Investment Management, LLCCIK: 0001026710
Diversified strategyMomentum followerSector-focused
Total reported value
$2.8B
Reporting period: 2026-06-30 · Number of holdings: 150
Granahan Investment Management, LLC disclosed 150 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $2.8B and a quarterly turnover rate of 60.3%.
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Personality snowflake
- Concentration
- 7.85
- Portfolio Stability
- 60.28
- Momentum
- 100
- Sector conviction
- 86.38
- Diversification
- 100
- Sizing Uniformity
- 86.01
Granahan Investment Management, LLC's disclosed holdings carry a Herfindahl concentration index of 0.020 — mathematically equivalent to about 51 equally-sized positions, well below its 150 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.40), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 38% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd SIMO
+128.3% $126.7M
Trim CRS
-59.5% -$34.6M
Add PRCH
-2.2% $95.5M
Sold out FIX
Trim MOD
-30.2% -$11.4M
Add LGND
+509.3% $41.7M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | PRCH | Porch Group Inc | Stock-Other | 6.64% | +2.24% | -2.22% | |
| 2 | SIMO | Silicon Motion Technol-adr | Stock-Other | 5.29% | +4.23% | +128.30% | |
| 3 | FPS | Forgent Power Solutions Inc | Stock-Other | 3.60% | +0.67% | -12.72% | |
| 4 | INDI | Indie Semiconductor Inc-a | Stock-Other | 3.11% | -0.05% | -4.26% | |
| 5 | VCTR | Victory Capital Holding - A | Stock-Other | 3.04% | -0.40% | -6.62% | |
| 6 | FTAI | FTAI Aviation Ltd. | Stock-Industrials | 2.83% | -1.20% | -13.69% | |
| 7 | MRX | Marex Group plc | Stock-Other | 2.72% | +0.08% | +2.50% | |
| 8 | MOD | Modine Manufacturing Co | Stock-Consumer Disc | 2.51% | -1.45% | -30.20% | |
| 9 | CRS | Carpenter Technology | Stock-Industrials | 2.13% | -2.44% | -59.50% | |
| 10 | NXT | Nextpower Inc-cl A | Stock-Tech | 2.11% | -0.36% | +16.85% | |
| 11 | MGNI | Magnite Inc | Stock-Other | 2.09% | +0.62% | +20.75% | |
| 12 | AXON | Axon Enterprise Inc | Stock-Industrials | 1.93% | +0.07% | +6.77% | |
| 13 | ONTO | Onto Innovation Inc | Stock-Tech | 1.91% | -0.06% | -28.75% | |
| 14 | TTMI | Ttm Technologies | Stock-Tech | 1.79% | +0.25% | -17.75% | |
| 15 | LGND | Ligand Pharmaceuticals | Stock-Healthcare | 1.66% | +1.43% | +509.27% | |
| 16 | KRUS | Kura Sushi USA Inc-class A | Stock-Other | 1.64% | -0.41% | +31.92% | |
| 17 | RGEN | Repligen CORP | Stock-Healthcare | 1.62% | +1.12% | +282.13% | |
| 18 | APPS | Digital Turbine Inc | Stock-Other | 1.61% | +0.62% | -50.87% | |
| 19 | LTH | Life Time Group Holdings Inc | Stock-Other | 1.58% | +0.02% | -9.74% | |
| 20 | GENI | Genius Sports Limited | Stock-Other | 1.52% | +0.37% | +30.47% | |
| 21 | CWST | Casella Waste Systems Inc-a | Stock-Industrials | 1.51% | +0.55% | +74.33% | |
| 22 | QXO | Qxo Inc | Stock-Industrials | 1.43% | +0.01% | +54.20% | |
| 23 | GNRC | Generac Holdings Inc | Stock-Industrials | 1.28% | +1.16% | +829.93% | |
| 24 | ZETA | Zeta Global Holdings Corp-a | Stock-Tech | 1.23% | +0.44% | +71.62% | |
| 25 | KRNT | Kornit Digital Ltd. | Stock-Other | 1.23% | -0.40% | -7.79% | |
| 26 | TWST | Twist Bioscience CORP | Stock-Other | 1.15% | +1.15% | NEW | |
| 27 | DAVE | Dave Inc | Stock-Other | 1.13% | +0.58% | +29.69% | |
| 28 | SIBN | Si-bone Inc | Stock-Other | 1.12% | +0.06% | +11.05% | |
| 29 | FROG | JFrog Ltd. | Stock-Tech | 0.97% | +0.67% | +130.34% | |
| 30 | FIGR | Figure Technology Solut-cl A | Stock-Other | 0.92% | -0.62% | -9.95% | |
| 31 | CLBT | Cellebrite DI Ltd. | Stock-Other | 0.86% | -0.30% | -4.51% | |
| 32 | GTES | Gates Industrial Corporation plc | Stock-Industrials | 0.84% | -0.01% | +8.89% | |
| 33 | GLBE | Global-E Online Ltd. | Stock-Other | 0.78% | -0.04% | +15.79% | |
| 34 | GRAL | Grail Inc | Stock-Healthcare | 0.78% | +0.66% | +547.17% | |
| 35 | RBC | RBC Bearings Inc | Stock-Industrials | 0.78% | -0.23% | -11.63% | |
| 36 | CAVA | Cava Group Inc | Stock-Consumer Disc | 0.74% | -0.45% | -12.66% | |
| 37 | KIDS | Orthopediatrics CORP | Stock-Other | 0.74% | +0.05% | +21.10% | |
| 38 | MTRN | Materion CORP | Stock-Other | 0.74% | -0.27% | -51.69% | |
| 39 | DSGX | Descartes Systems Grp/the | Stock-Tech | 0.73% | +0.54% | +437.99% | |
| 40 | ✓ | Stock-Other | 0.68% | +0.68% | NEW | ||
| 41 | TOST | Toast Inc-class A | Stock-Tech | 0.68% | +0.17% | +71.84% | |
| 42 | TCBI | Texas Capital Bancshares Inc | Stock-Financials | 0.68% | -0.11% | +7.42% | |
| 43 | SN | SharkNinja, Inc. | Stock-Consumer Disc | 0.67% | — | -5.67% | |
| 44 | CELC | Celcuity Inc | Stock-Other | 0.67% | +0.18% | +101.56% | |
| 45 | UMAC | Unusual Machines Inc /us | Stock-Other | 0.66% | +0.05% | -18.41% | |
| 46 | FWRG | First Watch Restaurant Group | Stock-Other | 0.63% | +0.08% | +25.35% | |
| 47 | NTNX | Nutanix Inc - A | Stock-Tech | 0.61% | +0.32% | +115.49% | |
| 48 | LASR | Nlight Inc | Stock-Other | 0.59% | +0.08% | +27.92% | |
| 49 | VECO | Veeco Instruments Inc | Stock-Other | 0.55% | +0.23% | +6.28% | |
| 50 | STOK | Stoke Therapeutics Inc | Stock-Other | 0.54% | +0.01% | +37.55% |
1–50 of 150
Portfolio Performance
Performance for Q3 2026
0%
Performance Last 4 Quarters
+7.9%
- Stdev
- +25.2%
- Beta
- +1.55
- Alpha
- -21.8%
- Max Drawdown
- -18%
- Annualized Perf
- +6.3%
- Batting Avg vs S&P
- +44.4%
- Sortino
- +0.56
- Stutzer
- +0.11
- Treynor
- +0.06
- Sterling
- +0.26
- Calmar
- +0.35
- Information Ratio
- -0.64
- Tracking Error
- +16.9%
- Stdev Down
- +16.4%
- Winning Months %
- +58.3%
- Losing Months %
- +41.7%
- Best 12 Months
- +26%
- Worst 12 Months
- -12.9%
- Efficiency Ratio
- +0.1
- Sharpe
- +0.37
- Stdev Sectors
- +14.3%
- Skewness
- -0.09
- Kurtosis
- -0.72
- Upside Potential
- +2.41
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 150 | $2.8B | 60 | ||
| 2026 Q1 | 149 | $2.1B | 49 | ||
| 2025 Q4 | 157 | $2.3B | 45 | ||
| 2025 Q3 | 146 | $2.4B | 58 | ||
| 2025 Q2 | 153 | $2.5B | 0 | ||
| 2025 Q1 | 159 | $2.0B | 100 | ||
| 2024 Q4 | 180 | $2.4B | 0 | ||
| 2024 Q3 | 187 | $2.5B | 0 | ||
| 2024 Q2 | 180 | $2.5B | 0 | ||
| 2024 Q1 | 181 | $2.8B | 0 | ||
| 2023 Q4 | 180 | $3.0B | 0 | ||
| 2023 Q3 | 183 | $2.8B | 0 | ||
| 2023 Q2 | 175 | $3.2B | 0 | ||
| 2023 Q1 | 165 | $3.3B | 0 | ||
| 2022 Q4 | 170 | $3.3B | 0 | ||
| 2022 Q3 | 176 | $3.1B | 0 | ||
| 2022 Q2 | 172 | $2.9B | 0 | ||
| 2022 Q1 | 178 | $4.0B | 0 | ||
| 2021 Q4 | 186 | $4.9B | 0 | ||
| 2021 Q3 | 193 | $5.3B | 0 | ||
| 2021 Q2 | 193 | $5.4B | 94 | ||
| 2021 Q1 | 191 | $4.7B | 40 | ||
| 2020 Q4 | 192 | $4.5B | 62 | ||
| 2020 Q3 | 180 | $2.9B | 37 | ||
| 2020 Q2 | 191 | $2.8B | 52 | ||
| 2020 Q1 | 184 | $1.9B | 39 | ||
| 2019 Q4 | 182 | $2.2B | 34 | ||
| 2019 Q3 | 181 | $1.8B | 31 | ||
| 2019 Q2 | 184 | $2.0B | 26 | ||
| 2019 Q1 | 189 | $1.9B | 44 | ||
| 2018 Q4 | 193 | $1.4B | 41 | ||
| 2018 Q3 | 201 | $1.8B | 32 | ||
| 2018 Q2 | 207 | $1.7B | 42 | ||
| 2018 Q1 | 197 | $1.4B | 39 | ||
| 2017 Q4 | 229 | $1.3B | 38 | ||
| 2017 Q3 | 222 | $1.2B | 32 | ||
| 2017 Q2 | 229 | $1.1B | 40 | ||
| 2017 Q1 | 211 | $996.4M | 100 | ||
| 2016 Q4 | 229 | $2.9B | 36 | ||
| 2016 Q3 | 233 | $3.1B | 28 | ||
| 2016 Q2 | 206 | $2.7B | 32 | ||
| 2016 Q1 | 210 | $2.7B | 28 | ||
| 2015 Q4 | 240 | $2.9B | 31 | ||
| 2015 Q3 | 255 | $3.2B | 40 | ||
| 2015 Q2 | 236 | $3.5B | 23 | ||
| 2015 Q1 | 231 | $3.5B | 36 | ||
| 2014 Q4 | 211 | $3.4B | 24 | ||
| 2014 Q3 | 206 | $3.2B | 22 | ||
| 2014 Q2 | 210 | $3.4B | 25 | ||
| 2014 Q1 | 204 | $3.7B | 29 | ||
| 2013 Q4 | 209 | $3.9B | 38 | ||
| 2013 Q3 | 213 | $3.8B | 35 | ||
| 2013 Q2 | 226 | $3.5B | 0 |
Holding changes this quarter
Granahan Investment Management, LLC's most significant position changes for 2026-06-30: Sold out: Comfort Systems USA Inc (FIX); New buy: Twist Bioscience CORP (TWST); Sold out: Semtech CORP (SMTC); Sold out: Sportradar Group AG (SRAD); New buy: .
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | SIMO | Silicon Motion Technol-adr | +4.2% | +128.30% | Add |
| 2 | PRCH | Porch Group Inc | +2.2% | -2.22% | Trim |
| 3 | LGND | Ligand Pharmaceuticals | +1.4% | +509.27% | Add |
| 4 | GNRC | Generac Holdings Inc | +1.2% | +829.93% | Add |
| 5 | TWST | Twist Bioscience CORP | +1.2% | NEW | New buy |
| 6 | RGEN | Repligen CORP | +1.1% | +282.13% | Add |
| 7 | ✓ | +0.7% | NEW | New buy | |
| 8 | FPS | Forgent Power Solutions Inc | +0.7% | -12.72% | Trim |
| 9 | FROG | JFrog Ltd. | +0.7% | +130.34% | Add |
| 10 | GRAL | Grail Inc | +0.7% | +547.17% | Add |
| 11 | MGNI | Magnite Inc | +0.6% | +20.75% | Add |
| 12 | APPS | Digital Turbine Inc | +0.6% | -50.87% | Trim |
| 13 | DAVE | Dave Inc | +0.6% | +29.69% | Add |
| 14 | CWST | Casella Waste Systems Inc-a | +0.6% | +74.33% | Add |
| 15 | DSGX | Descartes Systems Grp/the | +0.5% | +437.99% | Add |
| 16 | ZETA | Zeta Global Holdings Corp-a | +0.4% | +71.62% | Add |
| 17 | ✓ | +0.4% | NEW | New buy | |
| 18 | GENI | Genius Sports Limited | +0.4% | +30.47% | Add |
| 19 | NTNX | Nutanix Inc - A | +0.3% | +115.49% | Add |
| 20 | DYN | Dyne Therapeutics Inc | +0.3% | NEW | New buy |
| 21 | ATEX | Anterix Inc | +0.3% | NEW | New buy |
| 22 | SYRE | Spyre Therapeutics Inc | +0.3% | NEW | New buy |
| 23 | GWRE | Guidewire Software Inc | +0.3% | NEW | New buy |
| 24 | KRMN | Karman Holdings Inc | +0.3% | NEW | New buy |
| 25 | EVLV | Evolv Technologies Holdings | +0.3% | NEW | New buy |
| 26 | TTMI | Ttm Technologies | +0.3% | -17.75% | Trim |
| 27 | DOCN | Digitalocean Holdings Inc | +0.3% | +108.77% | Add |
| 28 | IRMD | Iradimed CORP | +0.2% | +1429.92% | Add |
| 29 | VECO | Veeco Instruments Inc | +0.2% | +6.28% | Add |
| 30 | FOUR | Shift4 Payments Inc-class A | +0.2% | NEW | New buy |
| 31 | ALKT | Alkami Technology Inc | +0.2% | +148.26% | Add |
| 32 | AGYS | Agilysys Inc | +0.2% | +152.74% | Add |
| 33 | GRBK | Green Brick Partners Inc | +0.2% | NEW | New buy |
| 34 | MAMA | Mama's Creations Inc | +0.2% | NEW | New buy |
| 35 | AEIS | Advanced Energy Industries | +0.2% | NEW | New buy |
| 36 | CELC | Celcuity Inc | +0.2% | +101.56% | Add |
| 37 | TOST | Toast Inc-class A | +0.2% | +71.84% | Add |
| 38 | OKTA | Okta Inc | +0.2% | +67.15% | Add |
| 39 | ORKA | Oruka Therapeutics Inc | +0.2% | NEW | New buy |
| 40 | ✓ | +0.2% | NEW | New buy | |
| 41 | AVAV | Aerovironment Inc | +0.2% | +113.04% | Add |
| 42 | CYRX | Cryoport Inc | +0.1% | +74.75% | Add |
| 43 | ALGM | Allegro Microsystems Inc | +0.1% | -13.74% | Trim |
| 44 | TSHA | Taysha Gene Therapies Inc | +0.1% | +47.77% | Add |
| 45 | FRPT | Freshpet Inc | +0.1% | NEW | New buy |
| 46 | SILC | Silicom Ltd. | +0.1% | NEW | New buy |
| 47 | SG | Sweetgreen Inc - Class A | +0.1% | +97.30% | Add |
| 48 | LMRI | Lumexa Imaging Holdings Inc | +0.1% | NEW | New buy |
| 49 | SPIR | Spire Global Inc | +0.1% | NEW | New buy |
| 50 | RDNT | Radnet Inc | +0.1% | +64.59% | Add |
1–50 of 171
Filing History
FAQ
What is Granahan Investment Management, LLC and what type of investor is it?
Granahan Investment Management, LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $2.8B, spread across 150 disclosed positions.
What are Granahan Investment Management, LLC's largest equity positions?
Based on the latest 13F filing, Granahan Investment Management, LLC's top holdings by market value are:
1. Porch Group Inc (PRCH) — $186.4M (6.6%)
2. Silicon Motion Technol-adr (SIMO) — $148.6M (5.3%)
3. Forgent Power Solutions Inc (FPS) — $101.0M (3.6%)
4. Indie Semiconductor Inc-a (INDI) — $87.2M (3.1%)
5. Victory Capital Holding - A (VCTR) — $85.3M (3.0%)
What changes did Granahan Investment Management, LLC make in its most recent portfolio filing?
In the latest reported quarter, Granahan Investment Management, LLC made 170 notable position adjustments: 22 new positions were initiated, 67 existing holdings were added to, 60 positions were partially reduced, and 21 were completely exited. The largest of these moves: Sold out: Comfort Systems USA Inc (FIX); New buy: Twist Bioscience CORP (TWST); Sold out: Semtech CORP (SMTC); Sold out: Sportradar Group AG (SRAD); New buy:
What sectors does Granahan Investment Management, LLC focus on?
Granahan Investment Management, LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Industrials: 38.0%
• Information Technology: 33.1%
• Health Care: 14.8%
• Consumer Discretionary: 10.4%
• Financials: 2.3%
• Materials: 0.8%
Investment Profile
Granahan Investment Management, LLC returned an annualized 6.3% over the trailing 36 months — underperforming the S&P 500 by 21.8 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.55 (more volatile than the market) and a 44% quarterly batting average against the index.
Its portfolio is broadly diversified and fast-trading, with 38.0% of the portfolio concentrated in Industrials.
Its turnover score has risen from 0 to 60 over the past 4 quarters — a shift toward more active trading.
It has added to its SIMO position over the past two quarters (+$127.3M, now $148.6M), while trimming AMRC over the same stretch (-$24.2M, still holding $652.0K).
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EC
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BL
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Developer Access
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