Granahan Investment Management, LLC
Long book
$2.07B
Q1 2026
Positions
149
Top-10 weight
34%
concentration
Last quarter
+36.9%
SPY +14.8%
Turnover
24%
of book per quarter
Strategy in plain words
auto-generated from filingsGranahan Investment Management, LLC is an institutional manager, running a $2.07B US long book across 149 positions.
The portfolio is moderately concentrated (top 10 ≈ 34% of the book). Turnover is modest: positions are typically held for years. Current anchor positions: CARPENTER TECHNOLOGY, PORCH GROUP INC, FTAI AVIATION LTD, MODINE MANUFACTURING CO, VICTORY CAPITAL HOLDING - A.
Over the last 9 quarters its long book ran on average 0.9pp per quarter ahead of the S&P 500, beating the index in 4 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-6.9%
Q2 2024
+10.8%
Q3 2024
+3.6%
Q4 2024
-11.9%
Q1 2025
+22.7%
Q2 2025
+5.6%
Q3 2025
-4.8%
Q4 2025
-7.8%
Q1 2026
+36.9%
Sector allocation
Technology 26%
Industrials 26%
Financials 13%
Healthcare 12%
Services media 10%
Consumer discretionary 6%
Other 3%
Materials 1%
Long book by quarter
What does Granahan Investment own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| CRS CARPENTER TECHNOLOGY | Industrials | 239.5K | $94.4M | 4.6% | -10.4% |
| PRCH PORCH GROUP INC | Technology | 12.7M | $90.9M | 4.4% | +9.4% |
| FTAI FTAI AVIATION LTD | Services media | 340.3K | $83.4M | 4.0% | -2.0% |
| MOD MODINE MANUFACTURING CO | Industrials | 377.6K | $81.8M | 4.0% | +15.7% |
| VCTR VICTORY CAPITAL HOLDING - A | Financials | 1.1M | $71.2M | 3.4% | +1.1% |
| INDI INDIE SEMICONDUCTOR INC-A | Technology | 20.3M | $65.3M | 3.2% | +17.8% |
| FPS FORGENT POWER SOLUTIONS-CL A | Industrials | 2.1M | $60.6M | 2.9% | New |
| MRX MAREX GROUP PLC | Financials | 1.2M | $54.6M | 2.6% | -11.1% |
| NXT NEXTPOWER INC-CL A | Technology | 424.4K | $51.2M | 2.5% | +10.3% |
| KRUS KURA SUSHI USA INC-CLASS A | Consumer discretionary | 607.9K | $42.4M | 2.1% | -22.8% |
| ONTO ONTO INNOVATION INC | Other | 198.7K | $40.7M | 2.0% | +1.0% |
| AXON AXON ENTERPRISE INC | Industrials | 90.7K | $38.5M | 1.9% | +19.8% |
| FIX COMFORT SYSTEMS USA INC | Industrials | 26.0K | $35.9M | 1.7% | 0.0% |
| KRNT KORNIT DIGITAL LTD | Industrials | 2.3M | $33.7M | 1.6% | -10.6% |
| LTH LIFE TIME GROUP HOLDINGS INC | Services media | 1.2M | $32.3M | 1.6% | -27.7% |
| TTMI TTM TECHNOLOGIES | Technology | 327.4K | $31.9M | 1.5% | +32.4% |
| FIGR FIGURE TECHNOLOGY SOLUT-CL A | Financials | 935.4K | $31.8M | 1.5% | +40.6% |
| MGNI MAGNITE INC | Technology | 2.6M | $30.3M | 1.5% | -18.1% |
| QXO QXO INC | Consumer discretionary | 1.5M | $29.3M | 1.4% | +88.8% |
| SMTC SEMTECH CORP | Technology | 370.6K | $28.5M | 1.4% | -11.4% |
| CAVA CAVA GROUP INC | Consumer discretionary | 303.9K | $24.6M | 1.2% | +31.7% |
| RMBS RAMBUS INC | Technology | 280.2K | $24.1M | 1.2% | +5.5% |
| SRAD SPORTRADAR GROUP AG-A | Technology | 1.4M | $24.1M | 1.2% | -13.8% |
| CLBT CELLEBRITE DI LTD | Technology | 1.7M | $24.0M | 1.2% | -43.1% |
| GENI GENIUS SPORTS LTD | Services media | 5.4M | $23.9M | 1.2% | -31.5% |
| SIBN SI-BONE INC | Healthcare | 1.7M | $22.0M | 1.1% | +97.6% |
| YSS YORK SPACE SYSTEMS INC | Industrials | 967.6K | $21.5M | 1.0% | New |
| RBC RBC BEARINGS INC | Industrials | 38.5K | $20.9M | 1.0% | -21.1% |
| MTRN MATERION CORP | Industrials | 144.5K | $20.9M | 1.0% | +4.5% |
| APPS DIGITAL TURBINE INC | Financials | 7.1M | $20.5M | 1.0% | +12.0% |
| CWST CASELLA WASTE SYSTEMS INC-A | Utilities | 250.3K | $19.9M | 1.0% | -2.9% |
| GTES GATES INDUSTRIAL CORP PLC | Industrials | 774.6K | $17.5M | 0.8% | -7.2% |
| GLBE GLOBAL-E ONLINE LTD | Technology | 547.0K | $16.9M | 0.8% | -54.1% |
| ARLO ARLO TECHNOLOGIES INC | Services media | 1.2M | $16.6M | 0.8% | +245.6% |
| ZETA ZETA GLOBAL HOLDINGS CORP-A | Technology | 1.0M | $16.3M | 0.8% | -60.9% |
| TCBI TEXAS CAPITAL BANCSHARES INC | Financials | 171.4K | $16.3M | 0.8% | -3.9% |
| AMRC AMERESCO INC-CL A | Industrials | 630.1K | $16.1M | 0.8% | -25.7% |
| LEU CENTRUS ENERGY CORP-CLASS A | Materials | 89.7K | $15.6M | 0.8% | +19.2% |
| KIDS ORTHOPEDIATRICS CORP | Healthcare | 896.7K | $14.2M | 0.7% | +35.1% |
| STRL STERLING INFRASTRUCTURE INC | Industrials | 34.3K | $14.0M | 0.7% | -42.0% |
| SN SHARKNINJA INC | Industrials | 131.7K | $14.0M | 0.7% | +16.7% |
| COMP COMPASS INC - CLASS A | Real estate | 1.9M | $13.8M | 0.7% | -39.9% |
| BLFS BIOLIFE SOLUTIONS INC | Healthcare | 722.1K | $13.8M | 0.7% | +49.7% |
| ALHC ALIGNMENT HEALTHCARE INC | Financials | 780.5K | $13.8M | 0.7% | +4.1% |
| UMAC UNUSUAL MACHINES INC /US | Technology | 1.0M | $12.6M | 0.6% | -12.0% |
| AIP ARTERIS INC | Technology | 713.1K | $11.7M | 0.6% | +201.0% |
| FWRG FIRST WATCH RESTAURANT GROUP | Consumer discretionary | 1.1M | $11.4M | 0.6% | -25.0% |
| DAVE DAVE INC | Financials | 65.5K | $11.4M | 0.6% | +3325.5% |
| IRTC IRHYTHM HOLDINGS INC | Healthcare | 96.0K | $11.3M | 0.5% | +567.9% |
| STOK STOKE THERAPEUTICS INC | Healthcare | 335.6K | $10.9M | 0.5% | +75.3% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 149 | $2.07B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 157 | $2.34B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 146 | $2.44B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 153 | $2.46B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 159 | $2.01B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 180 | $2.40B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 187 | $2.54B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 180 | $2.50B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 181 | $2.85B | canonical | SEC ↗ |
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