OBSOX Mutual Fund

NAV$38.81

AUM$549M

TER1.25%

Holdings78

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OBSOX Mutual Fund

NAV$38.81

Oberweis Small-Cap Opportunities Fund Investor Class

AUM$549M

TER1.25%

Holdings78

See how much of OBSOX you already own

Just $25 once·$99/mo·Download sample

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Overview Performance Chart Dividends Top Holdings All Holdings Sectors Geography Similar Compare Overlap

Showing top 50 of 78 holdings · as of Jun 30, 2026

OBSOX holdings, by weight
#	Ticker	Name	Weight	Cumulative	Shares	Mkt value	Sector	Industry
1	—	Credo Technology Group Holding LtdInfo Tech · Semiconductors	8.20%	8.2%	856,748	$232.99M	Info Tech	Semiconductors
2	AAOI	Applied Optoelectronics IncInfo Tech · Semiconductors	5.59%	13.8%	1,071,126	$158.70M	Info Tech	Semiconductors
Sector and industry · Pro
3	DOCN	Digitalocean Holdings Inc	4.26%	18.0%	770,300	$120.96M
4	SITM	Sitime Corp	2.78%	20.8%	105,796	$78.88M
5	SN	Sharkninja Inc	2.68%	23.5%	500,600	$76.23M
6	BTSG	Brightspring Health	2.52%	26.0%	1,026,800	$71.61M
7	HNGE	Hinge Health Inc	2.15%	28.2%	735,316	$61.03M
8	RMBS	Rambus Inc	2.04%	30.2%	436,600	$57.95M
9	MTSI	Macom Technology Solutions Holdings, Inc.	1.94%	32.2%	144,800	$55.08M
10	—	Nova Ltd. Ordinary Shares	1.83%	34.0%	95,900	$52.07M
11	LITE	Lumentum Holdings Inc	1.82%	35.8%	60,250	$51.70M
12	LSCC	Lattice Semiconductor Corp.	1.79%	37.6%	331,936	$50.77M
13	CRS	Carpenter Technology Corpcommon Stock	1.74%	39.3%	80,100	$49.41M
14	FTDR	Frontdoor Inc	1.73%	41.1%	633,800	$49.18M
15	ECG	Everus Construction Grou W/I	1.69%	42.8%	289,500	$48.04M
16	—	Life Time Inc	1.48%	44.2%	1,028,600	$42.01M
17	BROS	Dutch Bros Inc	1.47%	45.7%	579,700	$41.63M
18	MRCY	Mercury Systems Inc	1.44%	47.1%	333,600	$40.81M
19	SOI	Solaris Oilfield Infrastructure Inc Com Cl A	1.34%	48.5%	471,400	$37.93M
20	ACA	Arcosa Inc	1.33%	49.8%	261,000	$37.92M
21	CLH	Clean Harbors Inc	1.31%	51.1%	124,600	$37.22M
22	GMED	Globus Medical, Inc. (Class A)	1.26%	52.4%	453,400	$35.82M
23	NOVT	Novanta Inc.	1.23%	53.6%	215,700	$35.00M
24	VIAV	Viavi Solutions Inc	1.18%	54.8%	701,100	$33.48M
25	SKYW	Skywest Inc	1.16%	56.0%	330,800	$32.86M
26	MOG.A	Moog Inccommon Stock	1.14%	57.1%	76,700	$32.51M
27	LFUS	Littelfuse Inc	1.13%	58.2%	70,600	$32.15M
28	ARQT	Arcutis Biotherapeutics Inc	1.12%	59.3%	1,211,800	$31.77M
29	—	Billiontoone Inc Cl A	1.12%	60.5%	264,300	$31.71M
30	DAN	Dana Inc	1.12%	61.6%	1,164,700	$31.69M
31	—	Firstcash Inc	1.12%	62.7%	146,800	$31.76M
32	ESI	Element Solutions Inc	1.10%	63.8%	654,000	$31.23M
33	AIR	Aar Corp [Air]	1.09%	64.9%	217,300	$31.06M
34	RELY	Remitly Global, Inc.	1.09%	66.0%	1,387,600	$31.10M
35	FSS	Federal Signal Corp	1.07%	67.1%	237,600	$30.53M
36	LEVI	Levi Strauss & Co. Class A	1.05%	68.1%	1,203,400	$29.88M
37	ICUI	Icu Medical Inc	1.03%	69.1%	200,400	$29.38M
38	AIZ	Assurant, Inc.	1.02%	70.2%	108,000	$29.00M
39	VCYT	Veracyte, Inc.	1.01%	71.2%	486,500	$28.57M
40	WAY	Waystar Holding Corp	1.00%	72.2%	1,378,100	$28.29M
41	—	Indivior Plc(indv)	0.99%	73.2%	688,241	$28.24M
42	MMSI	Merit Medical Systems Inc	0.98%	74.1%	401,700	$27.85M
43	CGNX	Cognex Corp -	0.96%	75.1%	378,000	$27.37M
44	—	Emcompass Health Corp	0.96%	76.1%	269,400	$27.23M
45	GVA	Granite Construction Inc	0.95%	77.0%	170,500	$26.95M
46	NVST	Envista Holdings Corp Common Stock Usd	0.94%	77.9%	1,018,282	$26.83M
47	MYRG	Myr Group Inc	0.84%	78.8%	47,900	$23.97M
48	DRS	Leonardo DRS Inc	0.84%	79.6%	556,886	$23.76M
49	KGS	Kodiak Gas Services Inccommon Stock	0.83%	80.5%	315,100	$23.67M
50	ALHC	Alignment Healthcare	0.81%	81.3%	963,100	$22.93M
More holdings · Pro

Not reported for this fund: share changes.

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OBSOX Mutual Fund All Holdings

OBSOX holdings total 78 positions. The top 10 holdings account for 34.0% of the fund, led by Credo Technology Group Holding Ltd at 8.2%, Applied Optoelectronics Inc at 5.6%, Digitalocean Holdings Inc at 4.3%.

OBSOX portfolio concentration is moderate, with the top 10 representing 34.0% of total assets. The largest sector exposure is Information Technology at 40.4%.

OBSOX sectors provide a detailed breakdown. OBSOX overlap shows how holdings compare to other funds in your portfolio.