Granahan Investment Management, LLC

CIK

1026710

Location

WALTHAM, MA

Portfolio Value

Mid $2,067,341,622

Diversification

Diversified

Filing Date

Global Rank

#974 / 8,232 ▲ 3

Top Industry

Semiconductors 9.0%

3Y Alpha vs SPY

-14.0%

Period ended 2 months ago

Filed May 15, 2026 · 30d

25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+21.8%

SPY

+76.3%

Annualised alpha

-14.0%

Max drawdown

−29.1%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

149 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

4.6%

+0.0 pts

Top 5

20.4%

+2.7 pts

Top 10

33.7%

+3.8 pts

HHI

177

Diversified+15

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Industrials	28.3%	$584,551,727	32
Technology	24.9%	$514,200,541	41
Healthcare	14.2%	$293,441,188	44
Financial Services	14.1%	$291,471,946	10
Consumer Cyclical	11.7%	$242,605,225	11
Communication Services	2.9%	$60,165,312	3
Basic Materials	1.4%	$29,494,834	3
Real Estate	1.0%	$20,278,265	2
Energy	0.8%	$15,569,287	1
Consumer Defensive	0.8%	$15,563,297	2

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
INDI	indie Semiconductor, Inc.	+3,067,255	20,283,839	$65,313,961
PRCH	Porch Group, Inc.	+1,084,559	12,674,987	$90,879,656
SIBN	SI-BONE, Inc.	+858,942	1,739,097	$21,964,795
ARLO	Arlo Technologies, Inc.	+831,108	1,169,490	$16,641,842
APPS	Digital Turbine, Inc.	+762,888	7,112,351	$20,483,570
QXO	QXO, Inc.	+709,934	1,509,546	$29,315,383
MASS	908 Devices Inc.	+603,929	695,070	$4,253,828
OWLT	Owlet, Inc.	+499,906	1,186,655	$6,099,406
AIP	Arteris, Inc.	+476,181	713,077	$11,722,985
CHYM	Chime Financial, Inc.	+330,397	446,152	$8,356,426
FIGR	Figure Technology Solutions, Inc.	+269,882	935,400	$31,756,830
BLFS	Biolife Solutions Inc	+239,701	722,057	$13,776,847
KIDS	Orthopediatrics Corp	+232,760	896,741	$14,231,279
CYRX	Cryoport, Inc.	+190,938	231,138	$1,913,822
TSHA	Taysha Gene Therapies, Inc.	+179,270	883,241	$3,948,087
NTSK	Netskope Inc	+165,117	367,578	$3,120,737
STOK	Stoke Therapeutics, Inc.	+144,189	335,586	$10,926,680
BBNX	Beta Bionics, Inc.	+127,203	248,449	$2,489,458
ALGM	Allegro Microsystems, Inc.	+125,144	215,001	$6,778,981
MEC	Mayville Engineering Company, Inc.	+119,708	387,470	$6,955,086
RGTI	Rigetti Computing, Inc.	+105,494	326,721	$4,587,162
CCOI	Cogent Communications Holdings, Inc.	+100,422	317,447	$5,980,701
LPTH	Lightpath Technologies Inc	+97,601	753,621	$7,558,818
VKTX	Viking Therapeutics, Inc.	+96,606	332,192	$10,809,527
IRTC	iRhythm Holdings, Inc.	+81,645	96,022	$11,332,516
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
GENI	Genius Sports Ltd	−2,470,110	5,383,762	$23,850,065
ZETA	Zeta Global Holdings Corp.	−1,593,143	1,024,487	$16,309,833
PHR	Phreesia, Inc.	−1,412,006	987,607	$8,276,146
CLBT	Cellebrite DI Ltd.	−1,317,374	1,739,644	$23,972,294
COMP	Compass, Inc.	−1,250,911	1,885,312	$13,781,630
GLBE	Global-E Online Ltd.	−644,923	546,969	$16,873,993
TOST	Toast, Inc.	−638,079	399,067	$10,579,266
MGNI	Magnite, Inc.	−562,517	2,553,413	$30,334,546
LTH	Life Time Group Holdings, Inc.	−459,089	1,200,483	$32,341,012
ENVX	Enovix Corp	−374,979	1,589,586	$8,234,055
FWRG	First Watch Restaurant Group, Inc.	−363,200	1,088,037	$11,402,627
XERS	Xeris Biopharma Holdings, Inc.	−301,550	921,854	$5,346,753
KRNT	Kornit Digital Ltd.	−271,192	2,298,471	$33,695,584
UAMY	United States Antimony Corp	−260,807	218,184	$1,904,746
ACHR	Archer Aviation Inc.	−232,424	1,480,746	$7,655,456
SRAD	Sportradar Group AG	−230,812	1,439,659	$24,099,891
AMRC	Ameresco, Inc.	−217,934	630,073	$16,066,861
UTI	Universal Technical Institute Inc	−196,859	242,393	$8,750,387
TRNS	Transcat Inc	−185,639	5,941	$436,366
KRUS	Kura Sushi USA, Inc.	−179,191	607,917	$42,426,527
NPKI	NPK International Inc.	−178,789	401,658	$5,820,024
AZTA	Azenta, Inc.	−163,680	40,996	$866,245
MRX	Marex Group plc	−153,243	1,223,750	$54,554,775
UMAC	Unusual Machines, Inc.	−138,051	1,016,454	$12,604,029
IMNM	Immunome Inc.	−128,102	307,021	$6,714,549
No positions match the current search.

New Positions

Positions the filer opened this quarter

17 positions

Ticker	Company	Shares	Value
FPS	Forgent Power Solutions, Inc.	2,071,084	$60,620,628
YSS	York Space Systems Inc.	967,610	$21,451,913
LASR	Nlight, Inc.	185,271	$10,564,152
AVAV	AeroVironment Inc	40,736	$7,456,724
LIFE	Ethos Technologies Inc.	580,595	$6,485,246
CALY	Callaway Golf Co	422,920	$5,870,129
RDNT	RadNet, Inc.	104,282	$5,828,320
ROG	Rogers Corp	32,869	$3,527,829
CDNL	Cardinal Infrastructure Group Inc.	82,464	$3,270,109
VIAV	Viavi Solutions Inc.	95,761	$3,186,926
DOCN	DigitalOcean Holdings, Inc.	33,699	$2,890,700
PTGX	Protagonist Therapeutics, Inc	27,391	$2,887,011
GNRC	Generac Holdings Inc.	13,213	$2,580,895
NEOG	Neogen Corp	250,026	$2,322,741
BBOT	BridgeBio Oncology Therapeutics, Inc.	231,040	$2,067,808
WRBY	Warby Parker Inc.	81,924	$1,726,138
SG	Sweetgreen, Inc.	283,646	$1,472,122
No positions match the current search.

Sold Out

Positions the filer fully exited

23 positions

Ticker	Company	Shares	Value
ODD	Oddity Tech Ltd	1,523,204	$61,202,336
KVYO	Klaviyo, Inc.	605,271	$19,653,149
WLTH	Wealthfront Corp	1,386,092	$18,836,990
HUBS	Hubspot Inc	37,831	$15,181,580
LITE	Lumentum Holdings Inc.	28,498	$10,504,077
STKL	SunOpta Inc.	2,670,652	$10,148,477
VITL	Vital Farms, Inc.	216,551	$6,916,638
LENZ	LENZ Therapeutics, Inc.	431,100	$6,897,600
EXAS	EXACT SCIENCES CORP	57,212	$5,810,450
CVLT	Commvault Systems Inc	44,706	$5,604,344
ELF	e.l.f. Beauty, Inc.	73,239	$5,569,093
SLAB	Silicon Laboratories Inc.	32,019	$4,184,883
CERT	Certara, Inc.	460,797	$4,059,621
RCUS	Arcus Biosciences, Inc.	169,940	$4,049,670
SHLS	Shoals Technologies Group, Inc.	363,482	$3,089,597
VERX	Vertex, Inc.	150,299	$3,001,471
VRNS	Varonis Systems Inc	84,421	$2,769,008
SPSC	Sps Commerce Inc	28,004	$2,495,996
RDW	Redwire Corp	316,942	$2,408,759
WEAV	Weave Communications, Inc.	280,610	$2,129,829
TALK	Talkspace, Inc.	581,666	$2,111,447
OPRX	OptimizeRx Corp	117,122	$1,435,915
AMPX	Amprius Technologies, Inc.	64,382	$507,973
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

149 positions · $2,067,341,622 total · as of Mar 31, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Real Estate Technology

Showing 1–50 of 149 positions by value · page 1 of 3

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
CRS	Carpenter Technology Corp Industrials	Reduced	239,469	-27,706	$94,386,706	+12.2%	4.57%
PRCH	Porch Group, Inc. Financial Services	Added	12,674,987	+1,084,559	$90,879,656	−14.1%	4.40%
FTAI	FTAI Aviation Ltd. Industrials	Reduced	340,317	-7,048	$83,377,665	+21.9%	4.03%
MOD	Modine Manufacturing Co Consumer Cyclical	Added	377,586	+51,112	$81,826,662	+87.7%	3.96%
VCTR	Victory Capital Holdings, Inc. Financial Services	Added	1,087,315	+12,113	$71,197,386	+5.0%	3.44%
INDI	indie Semiconductor, Inc. Technology	Added	20,283,839	+3,067,255	$65,313,961	+7.5%	3.16%
FPS	Forgent Power Solutions, Inc. Industrials	NEW	2,071,084	NEW	$60,620,628	NEW	2.93%
MRX	Marex Group plc Financial Services	Reduced	1,223,750	-153,243	$54,554,775	+3.3%	2.64%
NXT	Nextpower Inc. Technology	Added	424,434	+39,724	$51,165,518	+52.7%	2.47%
KRUS	Kura Sushi USA, Inc. Consumer Cyclical	Reduced	607,917	-179,191	$42,426,527	+3.0%	2.05%
ONTO	Onto Innovation Inc. Technology	Added	198,694	+2,052	$40,746,178	+31.3%	1.97%
AXON	Axon Enterprise, Inc. Industrials	Added	90,692	+14,978	$38,515,985	−10.4%	1.86%
FIX	Comfort Systems USA Inc Industrials	Reduced	26,027	-8	$35,890,972	+47.7%	1.74%
KRNT	Kornit Digital Ltd. Industrials	Reduced	2,298,471	-2,840,855	$33,695,584	−54.4%	1.63%
LTH	Life Time Group Holdings, Inc. Consumer Cyclical	Reduced	1,200,483	-459,089	$32,341,012	−26.7%	1.56%
TTMI	Ttm Technologies Inc Technology	Added	327,434	+80,059	$31,898,620	+86.9%	1.54%
FIGR	Figure Technology Solutions, Inc. Financial Services	Added	935,400	+269,882	$31,756,830	+16.8%	1.54%
MGNI	Magnite, Inc. Communication Services	Reduced	2,553,413	-562,517	$30,334,546	−40.0%	1.47%
QXO	QXO, Inc. Industrials	Added	1,509,546	+709,934	$29,315,383	+90.1%	1.42%
SMTC	Semtech Corp Technology	Reduced	370,642	-47,585	$28,498,663	−7.5%	1.38%
CAVA	Cava Group, Inc. Consumer Cyclical	Added	303,891	+73,088	$24,584,781	+81.5%	1.19%
RMBS	Rambus Inc Technology	Added	280,246	+14,730	$24,109,563	−1.2%	1.17%
SRAD	Sportradar Group AG Technology	Reduced	1,439,659	-230,812	$24,099,891	−39.3%	1.17%
CLBT	Cellebrite DI Ltd. Technology	Reduced	1,739,644	-1,317,374	$23,972,294	−56.5%	1.16%
GENI	Genius Sports Ltd Communication Services	Reduced	5,383,762	-2,470,110	$23,850,065	−72.4%	1.15%
SIBN	SI-BONE, Inc. Healthcare	Added	1,739,097	+858,942	$21,964,795	+26.5%	1.06%
SIMO	Silicon Motion Technology CORP Technology	Reduced	195,252	-33,877	$21,924,847	+3.2%	1.06%
YSS	York Space Systems Inc. Industrials	NEW	967,610	NEW	$21,451,913	NEW	1.04%
RBC	RBC Bearings INC Industrials	Reduced	38,493	-10,264	$20,906,318	−4.4%	1.01%
MTRN	MATERION Corp Basic Materials	Added	144,476	+6,250	$20,898,453	+21.6%	1.01%
APPS	Digital Turbine, Inc. Technology	Added	7,112,351	+762,888	$20,483,570	−35.5%	0.99%
CWST	Casella Waste Systems Inc Industrials	Reduced	250,262	-7,453	$19,855,787	−21.3%	0.96%
GTES	Gates Industrial Corp plc Industrials	Reduced	774,604	-60,119	$17,513,796	−2.3%	0.85%
GLBE	Global-E Online Ltd. Consumer Cyclical	Reduced	546,969	-644,923	$16,873,993	−64.0%	0.82%
ARLO	Arlo Technologies, Inc. Industrials	Added	1,169,490	+831,108	$16,641,842	+251.5%	0.80%
ZETA	Zeta Global Holdings Corp. Technology	Reduced	1,024,487	-1,593,143	$16,309,833	−69.4%	0.79%
TCBI	Texas Capital Bancshares Inc/Tx Financial Services	Reduced	171,367	-7,002	$16,259,300	+0.7%	0.79%
AMRC	Ameresco, Inc. Industrials	Reduced	630,073	-217,934	$16,066,861	−35.3%	0.78%
LEU	Centrus Energy Corp Energy	Added	89,690	+14,455	$15,569,287	−14.8%	0.75%
KIDS	Orthopediatrics Corp Healthcare	Added	896,741	+232,760	$14,231,279	+20.7%	0.69%
STRL	Sterling Infrastructure, Inc. Industrials	Reduced	34,332	-24,816	$13,982,393	−22.8%	0.68%
SN	SharkNinja, Inc. Consumer Cyclical	Added	131,738	+18,875	$13,951,054	+10.5%	0.67%
COMP	Compass, Inc. Real Estate	Reduced	1,885,312	-1,250,911	$13,781,630	−58.4%	0.67%
BLFS	Biolife Solutions Inc Healthcare	Added	722,057	+239,701	$13,776,847	+18.1%	0.67%
ALHC	Alignment Healthcare, Inc. Healthcare	Added	780,500	+31,013	$13,752,410	−7.1%	0.67%
UMAC	Unusual Machines, Inc. Technology	Reduced	1,016,454	-138,051	$12,604,029	−14.3%	0.61%
AIP	Arteris, Inc. Technology	Added	713,077	+476,181	$11,722,985	+219.3%	0.57%
FWRG	First Watch Restaurant Group, Inc. Consumer Cyclical	Reduced	1,088,037	-363,200	$11,402,627	−47.9%	0.55%
DAVE	Dave Inc./DE Technology	Added	65,462	+63,551	$11,396,279	+2593.4%	0.55%
IRTC	iRhythm Holdings, Inc. Healthcare	Added	96,022	+81,645	$11,332,516	+344.2%	0.55%