Q2 2026 13F · SEC CIK 1729854

MainStreet Investment Advisors LLC

Institutional asset managerFiled 2026-08-12 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $734.3M
Reported positions: 166
Top holdings a year, 3 yrs: +12.5%
Assets under management: $5.9B

MainStreet Investment Advisors LLC is an institutional asset manager that reported 166 positions worth $734.3M in its Q2 2026 13F, filed 2026-08-12. Its largest holdings were Ishares Tr (IJH, 6.3%), Ishares Tr (EFA, 5.7%), Apple Inc (AAPL, 5.1%). A portfolio copying its top holdings returned 12.5% a year over the last 3 years, against 17.6% for the S&P 500.

MainStreet Investment Advisors LLC holdings largest 50 of 166 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

MainStreet Investment Advisors LLC 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
IJHIshares Tr	6.3%	6.5%	595,959	-6.2%	$46.0M
EFAIshares Tr	5.7%	6.0%	404,826	-2.2%	$42.1M
AAPLApple Inc	5.1%	5.1%	129,063	-3.2%	$37.3M
VGSHVanguard Scottsdale Fds	4.0%	4.4%	501,923	+0.3%	$29.2M
MSFTMicrosoft Corp	3.4%	3.8%	67,883	-0.1%	$25.3M
GOOGLAlphabet Inc	3.1%	3.0%	62,711	-8.9%	$22.4M
IJRIshares Tr	2.9%	2.9%	143,922	-6.5%	$21.3M
JPMJpmorgan Chase & Co	2.8%	2.8%	62,999	-0.3%	$20.6M
IVVIshares Tr	2.4%	1.8%	23,168	+29.4%	$17.4M
CATCaterpillar Inc	2.4%	2.0%	16,262	-12.4%	$17.3M
BLKBlackrock Inc	2.2%	2.5%	16,894	-0.8%	$16.2M
JNJJohnson & Johnson	2.2%	2.3%	63,190	+0.5%	$16.0M
AVGOBroadcom Inc	2.2%	1.9%	42,003	+1.4%	$15.9M
NVDANvidia Corporation	2.1%	2.0%	76,679	+1.9%	$15.3M
VGITVanguard Scottsdale Fds	2.0%	2.2%	252,978	+5.4%	$14.9M
ABBVAbbvie Inc	1.8%	1.8%	53,744	-0.2%	$13.5M
AMZNAmazon Com Inc	1.6%	1.6%	50,094	-1.5%	$11.9M
VWOVanguard Intl Equity Index F	1.5%	1.6%	186,625	-2.7%	$11.1M
PGProcter & Gamble Co	1.5%	1.6%	72,717	-0.0%	$10.7M
WMWaste Mgmt Inc Del	1.3%	1.5%	44,255	+0.2%	$9.9M
HDHome Depot Inc	1.3%	1.4%	27,446	+0.1%	$9.7M
CVXChevron Corporation	1.2%	1.7%	54,730	+2.5%	$9.1M
CSCOCisco Sys Inc	1.1%	0.8%	70,975	-1.0%	$8.3M
MCDMcdonalds Corp	1.0%	1.3%	28,457	+1.1%	$7.7M
PEPPepsico Inc	1.0%	1.3%	53,461	-2.1%	$7.2M
MCHPMicrochip Technology Inc.	1.0%	0.8%	77,136	-0.1%	$7.0M
EMREmerson Elec Co	0.9%	0.9%	48,254	+1.2%	$6.9M
PANWPalo Alto Networks Inc	0.9%	—	19,401	—	$6.6M
GSGoldman Sachs Group Inc	0.9%	0.8%	6,408	+4.2%	$6.5M
SOSouthern Co	0.9%	0.9%	65,921	+2.6%	$6.3M
LMTLockheed Martin Corp	0.8%	1.0%	11,520	+1.5%	$5.9M
USBUS Bancorp	0.7%	0.7%	88,767	+2.3%	$5.4M
VVisa Inc	0.7%	0.7%	15,586	-1.6%	$5.3M
MOAltria Group Inc	0.7%	0.7%	73,176	+3.0%	$5.3M
AEPAmerican Elec Pwr Co Inc	0.7%	0.7%	38,063	+4.6%	$5.2M
BNDVanguard Bd Index Fds	0.7%	0.7%	67,144	+7.7%	$4.9M
TSLATesla Inc	0.7%	0.6%	11,523	+0.0%	$4.8M
QCOMQualcomm Inc	0.6%	—	25,779	—	$4.8M
WMTWalmart Inc	0.6%	0.8%	41,082	+1.2%	$4.7M
IBMInternational Business Machs	0.6%	0.6%	16,136	+2.5%	$4.5M
CMICummins Inc	0.6%	—	6,218	—	$4.4M
METAMeta Platforms Inc	0.6%	0.7%	7,865	-9.6%	$4.4M
PAYXPaychex Inc	0.6%	0.6%	43,937	-3.0%	$4.3M
ENBEnbridge Inc	0.6%	0.6%	79,604	+6.3%	$4.3M
MARMarriott Intl Inc New	0.6%	0.6%	11,601	-1.2%	$4.3M
CDNSCadence Design System Inc	0.6%	—	11,020	—	$4.1M
HONHoneywell Intl Inc	0.6%	—	18,469	—	$4.1M
HONAHoneywell Aerospace Inc	0.6%	—	18,660	—	$4.1M
ACWIIshares Tr	0.6%	0.5%	25,719	-1.5%	$4.0M
MRKMerck & Co Inc	0.5%	0.6%	31,131	+1.3%	$4.0M

What MainStreet Investment Advisors LLC bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

IVV Ishares Tr+29.4% shares
BND Vanguard Bd Index Fds+7.7% shares
ENB Enbridge Inc+6.3% shares
VGIT Vanguard Scottsdale Fds+5.4% shares

Reduced

CAT Caterpillar Inc-12.4% shares
META Meta Platforms Inc-9.6% shares
GOOGL Alphabet Inc-8.9% shares
IJR Ishares Tr-6.5% shares
IJH Ishares Tr-6.2% shares

Left the top 50

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +18.5% /yr; S&P 500 +20.1%
3 years: +12.5% /yr; S&P 500 +17.6%
5 years: +6.5% /yr; S&P 500 +9.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$734.3M	166
Q1 2026	$664.5M	158
Q4 2025	$695.6M	159
Q3 2025	$743.8M	161
Q2 2025	$723.0M	154
Q1 2025	$687.3M	156
Q4 2024	$713.4M	150
Q3 2024	$752.7M	156
Q2 2024	$817.3M	156
Q1 2024	$832.6M	168
Q4 2023	$884.6M	169
Q3 2023	$858.2M	179

Questions about MainStreet Investment Advisors LLC's portfolio

What stocks does MainStreet Investment Advisors LLC own?

MainStreet Investment Advisors LLC's latest 13F, for Q2 2026 and filed Aug 12, 2026, lists 166 positions worth $734.3M. The largest are Ishares Tr (IJH) at 6.3%, Ishares Tr (EFA) at 5.7%, Apple Inc (AAPL) at 5.1%, Vanguard Scottsdale Fds (VGSH) at 4.0% and Microsoft Corp (MSFT) at 3.4%.

What did MainStreet Investment Advisors LLC buy last quarter?

In Q2 2026, MainStreet Investment Advisors LLC added Ishares Tr (IVV) (+29.4% shares), Vanguard Bd Index Fds (BND) (+7.7% shares) and Enbridge Inc (ENB) (+6.3% shares), compared with its Q1 2026 filing.

What did MainStreet Investment Advisors LLC sell last quarter?

In Q2 2026, MainStreet Investment Advisors LLC cut from its top 50 Honeywell Intl. Inc (HON), cut from its top 50 Cme Group Inc (CME), cut from its top 50 Medtronic PLC (MDT), cut from its top 50 Public Storage (PSA), cut from its top 50 Verizon Communications Inc (VZ), Caterpillar Inc (CAT) (-12.4% shares), Meta Platforms Inc (META) (-9.6% shares) and Alphabet Inc (GOOGL) (-8.9% shares), compared with its Q1 2026 filing.

How has MainStreet Investment Advisors LLC's portfolio performed?

A portfolio copying MainStreet Investment Advisors LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +12.5% a year over the last 3 years, against +17.6% for the S&P 500. Over 1 year: +18.5% against +20.1%. Over 5 years: +6.5% a year against +9.6%.

When is MainStreet Investment Advisors LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. MainStreet Investment Advisors LLC's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does MainStreet Investment Advisors LLC manage?

MainStreet Investment Advisors LLC reported $5.9B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $734.3M.