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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
+0.46%
1 Year Est. Return
+56.45%
3 Year Est. Return
+154.74%
5 Year Est. Return
+144.99%
10 Year Est. Return
+2,522.93%
AUM
$2.34B
AUM Growth
-$107M
Cap. Flow
+$15.5M
Cap. Flow %
0.67%
Top 10 Hldgs %
29.8%
Holding
173
New
27
Increased
68
Reduced
62
Closed
16

Top Buys

Rank Stock Value
1
ZETA icon
Zeta Global
ZETA
+$25.7M
2
PRCH icon
Porch Group
PRCH
+$23.5M
3
PHR icon
Phreesia
PHR
+$21M
4
MOD icon
Modine Manufacturing
MOD
+$20.8M
5
STRL icon
Sterling Infrastructure
STRL
+$20.4M

Top Sells

Rank Stock Value
1
FIX icon
Comfort Systems
FIX
+$61.6M
2
SPSC icon
SPS Commerce
SPSC
+$34.2M
3
LEU icon
Centrus Energy
LEU
+$28.2M
4
EXAS
Exact Sciences
EXAS
+$18M
5
DSGX icon
Descartes Systems
DSGX
+$16.3M

Sector Composition

Rank Sector Weight
1 Technology 28.03%
2 Industrials 20.7%
3 Healthcare 14.38%
4 Financials 12.85%
5 Consumer Discretionary 10.1%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
LPTH icon
76
Lightpath Technologies
LPTH
$789M
$7.09M 0.3%
+656,020
New +$5.32M
BOOT icon
77
Boot Barn
BOOT
$5.11B
$6.97M 0.3%
39,495
+2,839
+8% +$530K
NPKI
78
NPK International
NPKI
$1.15B
$6.92M 0.3%
580,447
+80,507
+16% +$982K
VITL icon
79
Vital Farms
VITL
$483M
$6.92M 0.3%
+216,551
New +$7.62M
LENZ
80
LENZ Therapeutics
LENZ
$168M
$6.9M 0.3%
431,100
+239,703
+125% +$6.99M
AZTA icon
81
Azenta
AZTA
$1.54B
$6.81M 0.29%
204,676
+194,928
+2,000% +$6.37M
SRRK icon
82
Scholar Rock
SRRK
$6.32B
$6.77M 0.29%
153,769
+23,855
+18% +$895K
EYPT icon
83
EyePoint Inc
EYPT
$1.13B
$6.7M 0.29%
366,675
+18,783
+5% +$266K
TSEM icon
84
Tower Semiconductor
TSEM
$28.5B
$6.67M 0.29%
56,795
-121,393
-68% -$11.7M
CECO icon
85
Ceco Environmental
CECO
$4.11B
$6.52M 0.28%
108,889
-125,810
-54% -$6.73M
MP icon
86
MP Materials
MP
$9.74B
$6.49M 0.28%
+128,417
New +$8.14M
VECO icon
87
Veeco
VECO
$3.02B
$6.38M 0.27%
223,278
-68,969
-24% -$2.05M
SLNO
88
DELISTED
Soleno Therapeutics
SLNO
$6.37M 0.27%
137,592
+28,339
+26% +$1.55M
CSGP icon
89
CoStar Group
CSGP
$12.8B
$6.18M 0.26%
91,929
-178,237
-66% -$12.6M
ALKT icon
90
Alkami Technology
ALKT
$2.1B
$6.12M 0.26%
265,266
-4,898
-2% -$108K
ANAB icon
91
AnaptysBio
ANAB
$1.64B
$6.1M 0.26%
125,855
-21,918
-15% -$854K
STOK icon
92
Stoke Therapeutics
STOK
$2.08B
$6.07M 0.26%
191,397
-62,502
-25% -$1.88M
ZYME icon
93
Zymeworks
ZYME
$1.71B
$5.91M 0.25%
224,408
-120,923
-35% -$2.64M
IMVT icon
94
Immunovant
IMVT
$8.24B
$5.85M 0.25%
230,188
-36,033
-14% -$803K
EXAS
95
DELISTED
Exact Sciences
EXAS
$5.81M 0.25%
57,212
-224,706
-80% -$18M
EWTX icon
96
Edgewise Therapeutics
EWTX
$4.84B
$5.76M 0.25%
232,295
-107,322
-32% -$2.15M
RYTM icon
97
Rhythm Pharmaceuticals
RYTM
$7.95B
$5.72M 0.25%
53,452
+3,724
+7% +$395K
WSC icon
98
WillScot Mobile Mini Holdings
WSC
$4.18B
$5.61M 0.24%
297,852
+97,405
+49% +$1.96M
CVLT icon
99
Commault Systems
CVLT
$5.78B
$5.6M 0.24%
44,706
+2,827
+7% +$398K
ELF icon
100
e.l.f. Beauty
ELF
$5.62B
$5.57M 0.24%
73,239
-25,598
-26% -$2.52M
2 3
4
5 6

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Granahan Investment Management's Q4 2025 Portfolio in Review

As of Q4 2025, Granahan Investment Management held 173 positions worth $2.34B, down 4.4% from $2.44B the previous quarter. Its ten largest holdings account for 30% of the portfolio.

Granahan Investment Management's Q4 2025 filing shows 27 new, 68 increased, 62 reduced and 16 closed positions. Its largest new stake was Sterling Infrastructure: 59,148 shares worth $18.1M. The largest sale was Comfort Systems, an estimated $61.6M.

By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Industrials and Healthcare.

  • Granahan Investment Management's largest Q4 2025 buy was Sterling Infrastructure: 59,148 shares worth $18.1M.
  • Granahan Investment Management added most to Zeta Global in Q4 2025, an estimated $25.7M increase.
  • Granahan Investment Management's biggest Q4 2025 reduction was Comfort Systems, cutting an estimated $61.6M.
  • Granahan Investment Management fully exited Shift4 in Q4 2025, selling an estimated $15.2M.
  • Granahan Investment Management's ten largest holdings make up 30% of its $2.34B portfolio in Q4 2025.
  • Granahan Investment Management opened 27 new positions and closed 16 in Q4 2025.
  • Granahan Investment Management's portfolio value fell 4.4% quarter-over-quarter to $2.34B.

Based on Granahan Investment Management's 13F filing for Q4 2025, filed 17 Feb 2026.