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GIM

Granahan Investment Management Portfolio holdings

AUM $2.07B
1-Year Est. Return 56.45%
This Fund
S&P 500
This Quarter Est. Return
+2.6%
1 Year Est. Return
+56.45%
3 Year Est. Return
+154.74%
5 Year Est. Return
+144.99%
10 Year Est. Return
+2,452.87%
AUM
$2.07B
AUM Growth
-$268M
Cap. Flow
-$133M
Cap. Flow %
-6.44%
Top 10 Hldgs %
33.65%
Holding
174
New
17
Increased
66
Reduced
65
Closed
25

Top Buys

Rank Stock Value
1
FPS
Forgent Power Solutions
FPS
+$68.9M
2
YSS
York Space Systems
YSS
+$23.5M
3
QXO
QXO Inc
QXO
+$16.2M
4
SIBN icon
SI-BONE Inc
SIBN
+$13.4M
5
DAVE icon
Dave Inc
DAVE
+$12.3M

Top Sells

Rank Stock Value
1
ODD icon
ODDITY Tech
ODD
+$61.2M
2
ZETA icon
Zeta Global
ZETA
+$29.5M
3
GLBE icon
Global E Online
GLBE
+$22.7M
4
CLBT icon
Cellebrite
CLBT
+$19.9M
5
KVYO icon
Klaviyo
KVYO
+$19.7M

Sector Composition

Rank Sector Weight
1 Industrials 28.28%
2 Technology 24.87%
3 Healthcare 14.19%
4 Financials 14.1%
5 Consumer Discretionary 11.74%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SIBN icon
26
SI-BONE Inc
SIBN
$737M
$22M 1.06%
1,739,097
+858,942
+98% +$13.4M
SIMO icon
27
Silicon Motion
SIMO
$9.19B
$21.9M 1.06%
195,252
-33,877
-15% -$4.11M
YSS
28
York Space Systems
YSS
$2.24B
$21.5M 1.04%
+967,610
New +$23.5M
RBC icon
29
RBC Bearings
RBC
$18.8B
$20.9M 1.01%
38,493
-10,264
-21% -$5.45M
MTRN icon
30
Materion
MTRN
$5.01B
$20.9M 1.01%
144,476
+6,250
+5% +$909K
APPS icon
31
Digital Turbine
APPS
$1.02B
$20.5M 0.99%
7,112,351
+762,888
+12% +$3.28M
CWST icon
32
Casella Waste Systems
CWST
$5.69B
$19.9M 0.96%
250,262
-7,453
-3% -$714K
GTES icon
33
Gates Industrial Corporation Ltd.
GTES
$6.81B
$17.5M 0.85%
774,604
-60,119
-7% -$1.46M
GLBE icon
34
Global E Online
GLBE
$6.08B
$16.9M 0.82%
546,969
-644,923
-54% -$22.7M
ARLO icon
35
Arlo Technologies
ARLO
$1.4B
$16.6M 0.81%
1,169,490
+831,108
+246% +$11.1M
ZETA icon
36
Zeta Global
ZETA
$4.77B
$16.3M 0.79%
1,024,487
-1,593,143
-61% -$29.5M
TCBI icon
37
Texas Capital Bancshares
TCBI
$4.31B
$16.3M 0.79%
171,367
-7,002
-4% -$683K
AMRC icon
38
Ameresco
AMRC
$1.15B
$16.1M 0.78%
630,073
-217,934
-26% -$6.53M
LEU icon
39
Centrus Energy
LEU
$3.22B
$15.6M 0.75%
89,690
+14,455
+19% +$3.49M
KIDS icon
40
OrthoPediatrics
KIDS
$485M
$14.2M 0.69%
896,741
+232,760
+35% +$4.07M
STRL icon
41
Sterling Infrastructure
STRL
$20.3B
$14M 0.68%
34,332
-24,816
-42% -$9.7M
SN icon
42
SharkNinja
SN
$21B
$14M 0.67%
131,738
+18,875
+17% +$2.21M
COMP icon
43
Compass
COMP
$8.27B
$13.8M 0.67%
1,885,312
-1,250,911
-40% -$13.1M
BLFS icon
44
BioLife Solutions
BLFS
$1.46B
$13.8M 0.67%
722,057
+239,701
+50% +$5.3M
ALHC icon
45
Alignment Healthcare
ALHC
$4.02B
$13.8M 0.67%
780,500
+31,013
+4% +$623K
UMAC icon
46
Unusual Machines
UMAC
$925M
$12.6M 0.61%
1,016,454
-138,051
-12% -$2.1M
AIP icon
47
Arteris
AIP
$1.4B
$11.7M 0.57%
713,077
+476,181
+201% +$7.55M
FWRG icon
48
First Watch Restaurant Group
FWRG
$747M
$11.4M 0.55%
1,088,037
-363,200
-25% -$5.25M
DAVE icon
49
Dave Inc
DAVE
$5.12B
$11.4M 0.55%
65,462
+63,551
+3,326% +$12.3M
IRTC icon
50
iRhythm Holdings
IRTC
$3.59B
$11.3M 0.55%
96,022
+81,645
+568% +$11.8M
1
2
3 4 5

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Granahan Investment Management's Q1 2026 Portfolio in Review

As of Q1 2026, Granahan Investment Management held 174 positions worth $2.07B, down 11% from $2.34B the previous quarter. Its ten largest holdings account for 34% of the portfolio.

Granahan Investment Management withdrew a net $133M in Q1 2026, closing 25 positions and reducing 65 holdings. Its most notable exit was ODDITY Tech, an estimated $61.2M position sold in full.

By sector, the portfolio is most concentrated in Industrials at 28% of assets, up from 21% a quarter earlier, followed by Technology and Healthcare.

Against the trend, Granahan Investment Management opened a new position in Forgent Power Solutions worth $60.6M.

  • Granahan Investment Management's largest Q1 2026 buy was Forgent Power Solutions: 2,071,084 shares worth $60.6M.
  • Granahan Investment Management added most to QXO Inc in Q1 2026, an estimated $16.2M increase.
  • Granahan Investment Management's biggest Q1 2026 reduction was Zeta Global, cutting an estimated $29.5M.
  • Granahan Investment Management fully exited ODDITY Tech in Q1 2026, selling an estimated $61.2M.
  • Granahan Investment Management's ten largest holdings make up 34% of its $2.07B portfolio in Q1 2026.
  • Granahan Investment Management opened 17 new positions and closed 25 in Q1 2026.
  • Granahan Investment Management's portfolio value fell 11% quarter-over-quarter to $2.07B.

Based on Granahan Investment Management's 13F filing for Q1 2026, filed 15 May 2026.