Q3 2026 13F · SEC CIK 1800911

S.A. Mason LLC

Wealth managerFiled 2026-10-13 for Q3 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $340.6M
Reported positions: 284
Top holdings a year, 3 yrs: +20.1%
Assets under management: $528.7M

S.A. Mason LLC is a wealth manager that reported 284 positions worth $340.6M in its Q3 2026 13F, filed 2026-10-13. Its largest holdings were Nvidia Corporation (NVDA, 5.5%), Vanguard Mun Bd Fds (VSDM, 3.9%), Vanguard Index Fds (VOO, 3.6%). A portfolio copying its top holdings returned 20.1% a year over the last 3 years, against 20.4% for the S&P 500.

S.A. Mason LLC holdings largest 50 of 284 positions.

Weights are shares of the filer's total reported 13F value, compared with Q2 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.

S.A. Mason LLC 13F holdings
Stock	% of 13F value	Q2 2026	Shares	Share change	Reported value
NVDANvidia Corporation	5.5%	4.9%	81,996	+1.9%	$18.7M
VSDMVanguard Mun Bd Fds	3.9%	3.9%	179,761	+9.7%	$13.4M
VOOVanguard Index Fds	3.6%	3.3%	17,522	+11.3%	$12.3M
VTIVanguard Index Fds	3.5%	3.2%	31,460	+11.5%	$11.8M
IVVIshares Tr	3.0%	3.1%	13,529	-0.1%	$10.4M
VTESVanguard Wellington Fd	2.9%	2.9%	100,969	+9.2%	$10.0M
MSFTMicrosoft Corp	2.5%	1.9%	16,933	+0.2%	$8.7M
VOVanguard Index Fds	2.3%	2.3%	98,229	+4.5%	$7.7M
AAPLApple Inc	2.3%	2.1%	23,112	-1.1%	$7.7M
VBVanguard Index Fds	2.2%	2.4%	26,564	+3.1%	$7.6M
SPYState Str Spdr S&p 500 ETF T	2.0%	2.0%	8,826	+0.0%	$6.7M
VTEIVanguard Mun Bd Fds	1.8%	2.0%	65,253	+2.9%	$6.2M
COSTCostco Wholesale Corporation	1.4%	1.5%	5,219	+0.0%	$4.8M
VEAVanguard Ftse Developed Markets Index Fu	1.4%	1.3%	67,108	+9.8%	$4.7M
MUMicron Technology Inc	1.3%	1.4%	4,110	+2.4%	$4.4M
PANWPalo Alto Networks Inc	1.3%	1.2%	10,890	-2.5%	$4.3M
PLTRPalantir Technologies Inc	1.2%	0.8%	22,352	+0.0%	$4.2M
SNDKSandisk Corp	1.2%	1.6%	2,319	-1.2%	$4.0M
VCRMVanguard Mun Bd Fds	1.2%	1.2%	55,630	+5.4%	$4.0M
GOOGLAlphabet Inc	1.1%	1.2%	11,139	+0.3%	$3.8M
STXFEa Series Trust	1.1%	1.1%	77,129	+1.7%	$3.8M
ABBVAbbvie Inc	0.9%	1.0%	12,345	+0.0%	$3.2M
VVisa Inc	0.9%	0.9%	8,702	+6.7%	$3.1M
LLYEli Lilly & Co	0.9%	0.9%	2,623	+6.3%	$3.0M
CRWDCrowdstrike Hldgs Inc	0.9%	0.6%	11,016	+299.3%	$2.9M
HNIHNI Corp	0.8%	0.9%	62,484	-17.8%	$2.8M
MAMastercard Incorporated	0.8%	0.8%	5,062	+2.3%	$2.8M
AMGNAmgen Inc	0.8%	0.7%	6,408	+0.0%	$2.7M
GEGe Aerospace	0.8%	1.0%	8,562	+0.0%	$2.7M
GOOGAlphabet Inc	0.8%	0.8%	7,733	+10.9%	$2.6M
CVXChevron Corporation	0.8%	0.6%	12,625	+0.0%	$2.6M
GLDSpdr Gold Tr	0.8%	0.8%	6,713	+1.3%	$2.6M
METAMeta Platforms Inc	0.7%	0.6%	3,501	-0.9%	$2.5M
KMBKimberly-Clark Corp	0.7%	0.8%	25,550	+9.6%	$2.5M
VVVanguard Index Fds	0.7%	0.7%	6,916	+2.4%	$2.4M
SPMDSpdr Series Trust	0.7%	0.8%	37,833	+2.9%	$2.4M
TJXTjx Cos Inc New	0.7%	0.8%	16,891	+0.0%	$2.2M
AKREProfesionally Managed Portfo	0.6%	0.7%	40,916	-9.8%	$2.2M
JNJJohnson & Johnson	0.6%	0.6%	7,848	+0.0%	$2.1M
PGProcter & Gamble Co	0.6%	0.6%	14,278	+0.2%	$2.1M
IWFIshares Tr	0.6%	0.6%	16,479	+0.1%	$2.1M
SUBIshares Tr	0.6%	0.6%	19,650	+0.0%	$2.1M
VTEBVanguard Mun Bd Fds	0.6%	0.7%	43,100	+0.0%	$2.0M
ORLYOreilly Automotive Inc	0.6%	0.7%	23,461	+0.8%	$2.0M
SCHBSchwab Strategic Tr	0.6%	0.6%	66,870	+0.0%	$2.0M
CSCOCisco Sys Inc	0.6%	—	17,863	—	$1.9M
PEPPepsico Inc	0.5%	0.6%	14,464	-2.1%	$1.8M
AMZNAmazon Com Inc	0.5%	—	7,213	—	$1.8M
BRK-BBerkshire Hathaway Inc Del	0.5%	0.6%	3,543	-2.1%	$1.8M
QQQInvesco Qqq Tr	0.5%	—	2,364	—	$1.7M

What S.A. Mason LLC bought and sold in Q3 2026, against Q2 2026.

New positions

Q2 2026's filing was too long to tell new positions apart.

Added to

CRWD Crowdstrike Hldgs Inc+299.3% shares
VTI Vanguard Index Fds+11.5% shares
VOO Vanguard Index Fds+11.3% shares
GOOG Alphabet Inc+10.9% shares
VEA Vanguard Ftse Developed Markets Index Fu+9.8% shares
VSDM Vanguard Mun Bd Fds+9.7% shares
KMB Kimberly-Clark Corp+9.6% shares
VTES Vanguard Wellington Fd+9.2% shares

Reduced

HNI HNI Corp-17.8% shares
AKRE Profesionally Managed Portfo-9.8% shares

Left the top 50

Share counts compared with the Q2 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: +10.9% /yr; S&P 500 +20.1%
3 years: +20.1% /yr; S&P 500 +20.4%
5 years: +12.5% /yr; S&P 500 +11.6%

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
Q3 2026	$340.6M	284
Q2 2026	$325.5M	282
Q1 2026	$266.4M	266
Q4 2025	$252.9M	260
Q3 2025	$226.6M	256
Q2 2025	$206.7M	362
Q1 2025	$189.3M	348
Q4 2024	$190.4M	342
Q3 2024	$188.6M	324
Q2 2024	$175.9M	318
Q1 2024	$166.4M	314
Q4 2023	$149.1M	315

Questions about S.A. Mason LLC's portfolio

What stocks does S.A. Mason LLC own?

S.A. Mason LLC's latest 13F, for Q3 2026 and filed Oct 13, 2026, lists 284 positions worth $340.6M. The largest are Nvidia Corporation (NVDA) at 5.5%, Vanguard Mun Bd Fds (VSDM) at 3.9%, Vanguard Index Fds (VOO) at 3.6%, Vanguard Index Fds (VTI) at 3.5% and Ishares Tr (IVV) at 3.0%.

What did S.A. Mason LLC buy last quarter?

In Q3 2026, S.A. Mason LLC added Crowdstrike Hldgs Inc (CRWD) (+299.3% shares), Vanguard Index Fds (VTI) (+11.5% shares) and Vanguard Index Fds (VOO) (+11.3% shares), compared with its Q2 2026 filing.

What did S.A. Mason LLC sell last quarter?

In Q3 2026, S.A. Mason LLC cut from its top 50 Vertiv Holdings Co (VRT), cut from its top 50 Schwab Strategic Tr (SCHM), cut from its top 50 Intel Corp (INTC), HNI Corp (HNI) (-17.8% shares) and Profesionally Managed Portfo (AKRE) (-9.8% shares), compared with its Q2 2026 filing.

How has S.A. Mason LLC's portfolio performed?

A portfolio copying S.A. Mason LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +20.1% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +10.9% against +20.1%. Over 5 years: +12.5% a year against +11.6%.

When is S.A. Mason LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. S.A. Mason LLC's filing for the quarter ending Dec 31, 2026 is due by Feb 14, 2027; this page updates the day after it is published.

How much money does S.A. Mason LLC manage?

S.A. Mason LLC reported $528.7M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $340.6M.