Aufman Associates Inc

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CIK 1801573

13F portfolio (2026-Q1)

$204M

Positions

Implied 1Y CAGR

modeled · as filed

Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.

Implied return what this book implies · modeled, not advice methodology →

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As filed = each book applied at its quarter-end (what the reported book did) · As copyable = applied at its statutory 45-day filing deadline (what a 13F follower could have earned).

Computing…

Hypothetical modeled performance constructed with hindsight — not actual results, and not indicative of future results. See the Disclaimer.

Exposures · what this manager owns, by sector & size (2026-Q1)

Holdings

Top 5

73.7%

Top 10

84.1%

Effective N

8.5

HHI

0.117

This quarter

0 new · 0 exit →

By sector

Unclassified75.0%

Information Technology14.6%

Health Care2.8%

Financials1.6%

Communication Services1.5%

Materials1.3%

Energy1.2%

Real Estate0.6%

Other1.4%

By market cap

Unknown75.2%

Large ($10–200B)16.5%

Mega (>$200B)7.0%

Mid ($2–10B)1.3%

By region

Other75.0%

North America24.8%

Asia-Pacific0.2%

By industry group GICS — finer than sector

Industry group	Weight	Names
Unclassified	76.61%	35
Technology Hardware & Equipment	13.56%	2
Pharmaceuticals & Biotechnology	2.45%	5
Chemicals	1.32%	1
Software & IT Services	1.19%	2
Oil, Gas & Consumable Fuels	1.18%	3
Software	0.60%	1
Equity Real Estate Investment Trusts (REITs)	0.57%	1
Semiconductors & Semiconductor Equipment	0.46%	2
Life Sciences Tools & Services	0.36%	1
Beverages	0.28%	2
Hotels, Restaurants & Leisure	0.24%	2
Food Products	0.21%	1
Entertainment	0.19%	1
Professional Services	0.14%	1
Specialty Retail	0.14%	1
Utilities	0.14%	1
Diversified Telecommunication Services	0.13%	1
Distributors	0.13%	1
Machinery	0.12%	1

Top holdings

#	Ticker	Name	Sector	Weight
1	VB	VANGUARD INDEX FDS	Unclassified	18.35%
2	VOO	VANGUARD INDEX FDS	Unclassified	17.51%
3	VEA	VANGUARD TAX-MANAGED FDS	Unclassified	15.95%
4	STX	Seagate Technology Holdings plc	Information Technology	12.59%
5	FNDX	SCHWAB STRATEGIC TR	Unclassified	9.27%
6	VOT	VANGUARD INDEX FDS	Unclassified	3.12%
7	IVV	ISHARES TR	Unclassified	2.44%
8	VEU	VANGUARD INTL EQUITY INDEX F	Unclassified	1.93%
9	BRK.B	BERKSHIRE HATHAWAY INC	Financials	1.59%
10	MRNA	Moderna, Inc.	Health Care	1.35%

31/65 names classified · sector 25.0% of weight · industry 23.4% · mkt cap 24.8%; unclassified names shown, never dropped.

Sector allocation over time · how the GICS mix & top names shifted quarter by quarter

top 5/sector, rest → “Other” · 26 quarters

Information TechnologySTX, AAPL, MSFT, INTC, AVGO · other

FinancialsBRK.B, UNH, FHI, PNC, JPM

Health CareRVTY, JNJ, ABBV, ABT, MRNA · other

MaterialsMTX, ALTO, AA, PG

Real Estate

Communication ServicesGOOG, DIS, VZ, AMCX, T · other

EnergyXOM, COP, CVX

IndustrialsPAYX, MMM, BABA, BA, NEO · other

Consumer StaplesKO, KHC, PEP

UtilitiesPPL, NEE, DUK

Consumer DiscretionaryAMZN, ACH, MCD, LOW, MCK · other

UnclassifiedVB, VOO, VEA, SEAGATE TECHNOLOGY PLC, FNDX · other

Sector is classified on each name's CURRENT fundamentals, not point-in-time — apparent sector drift can reflect the market re-rating a holding, not a manager trade. 13F is a lagged quarterly snapshot of long positions in US-listed securities only — foreign companies held via a US listing or ADR ARE included, but shares listed only on non-US exchanges (plus shorts, options and cash) are not. Latest quarter: 25.0% of the book is sector-classified (unclassified names shown, never dropped).

Style box · size × value-growth placement of the reported book (2026-Q1), classified on current fundamentals (not point-in-time) — load it into PORT to overlay your own portfolio

Only 22% of book weight classified — the grid is NOT representative of the whole book.

holdings, colored by sector (28 classified)Aufman Associates Inc centroid (Large Core)

Information TechnologyCommunication ServicesHealth CareMaterialsEnergyReal EstateConsumer DiscretionaryConsumer StaplesIndustrialsUtilities

Style box summary for Aufman Associates Inc: centroid Large Core. Heaviest cells: Large Core 13.4%, Large Growth 3.3%, Large Value 2.5%.

Classified: 21.9% of book weight (28/65 names) · unclassified 78.1%: VB, VOO, VEA, FNDX, VOT, IVV, VEU, BRK.B, MRNA, VXUS +27 more. Size: cap 70/20/10 bands; style: value/growth composite on our own metrics — not Morningstar's model.

Contribution holdings-based, any period

No contribution data for this period.

Holdings· 65 positions (2026-Q1) · largest first · Δ vs 2025-Q4

#	Security	Shares	Value	Weight	Δ QoQ
1	VBVANGUARD INDEX FDS	142,772	$37M	18.3%	HOLD
2	VOOVANGUARD INDEX FDS	59,743	$36M	17.5%	HOLD
3	VEAVANGUARD TAX-MANAGED FDS	507,208	$33M	15.9%	HOLD
4	STXSEAGATE TECHNOLOGY HLDNGS PL	65,507	$26M	12.6%	HOLD
5	FNDXSCHWAB STRATEGIC TR	678,694	$19M	9.3%	ADD 18%
6	VOTVANGUARD INDEX FDS	24,677	$6M	3.1%	HOLD
7	IVVISHARES TR	7,626	$5M	2.4%	HOLD
8	VEUVANGUARD INTL EQUITY INDEX F	52,248	$4M	1.9%	HOLD
9	BRK.BBERKSHIRE HATHAWAY INC DEL	6,778	$3M	1.6%	HOLD
10	MRNAMODERNA INC	56,998	$3M	1.3%	ADD 32%
11	MTXMINERALS TECHNOLOGIES INC	38,011	$3M	1.3%	HOLD
12	GOOGALPHABET INC	7,090	$2M	1.0%	HOLD
13	AAPLAPPLE INC	7,749	$2M	1.0%	HOLD
14	XOMEXXON MOBIL CORP	8,648	$1M	0.7%	TRIM −4%
15	MSFTMICROSOFT CORP	3,288	$1M	0.6%	HOLD
16	CCICROWN CASTLE INC	14,274	$1M	0.6%	TRIM −13%
17	VXUSVANGUARD STAR FDS	14,674	$1M	0.6%	HOLD
18	ESMLISHARES TR	22,063	$1M	0.5%	HOLD
19	USXFISHARES TR	18,188	$1M	0.5%	ADD 10%
20	VUGVANGUARD INDEX FDS	1,947	$850,341	0.4%	TRIM −8%
21	VOVANGUARD INDEX FDS	2,905	$834,243	0.4%	HOLD
22	IWFISHARES TR	1,927	$821,673	0.4%	HOLD
23	SPYSTATE STR SPDR S&P 500 ETF T	1,224	$796,016	0.4%	TRIM −2%
24	JNJJOHNSON & JOHNSON	3,203	$782,941	0.4%	TRIM −6%
25	RVTYREVVITY INC	8,260	$723,659	0.4%	HOLD
26	ABBVABBVIE INC	3,262	$709,350	0.3%	HOLD
27	ESGDISHARES TR	6,911	$660,793	0.3%	HOLD
28	CVXCHEVRON CORP NEW	2,997	$620,141	0.3%	HOLD
29	VTIVANGUARD INDEX FDS	1,907	$611,805	0.3%	HOLD
30	AVGOBROADCOM INC	1,883	$582,869	0.3%	HOLD
31	IWDISHARES TR	2,310	$493,578	0.2%	HOLD
32	IJRISHARES TR	3,945	$490,394	0.2%	HOLD
33	IWPISHARES TR	3,499	$448,292	0.2%	HOLD
34	MRKMERCK & CO INC	3,675	$442,066	0.2%	HOLD
35	ONEQFIDELITY COMWLTH TR	4,969	$421,918	0.2%	HOLD
36	KHCKRAFT HEINZ CO	18,621	$418,786	0.2%	HOLD
37	GOOGLALPHABET INC	1,346	$387,056	0.2%	HOLD
38	DISDISNEY WALT CO	3,990	$384,566	0.2%	HOLD
39	SUSAISHARES TR	2,692	$355,629	0.2%	ADD 4%
40	TSMTAIWAN SEMICONDUCTOR MFG LTD	1,030	$348,089	0.2%	HOLD
41	EFAXSPDR INDEX SHS FDS	6,967	$346,708	0.2%	HOLD
42	COPCONOCOPHILLIPS	2,400	$316,800	0.2%	HOLD
43	ABTABBOTT LABS	3,051	$313,246	0.2%	HOLD
44	TOTLSSGA ACTIVE ETF TR	7,653	$304,066	0.1%	HOLD
45	PAYXPAYCHEX INC	3,154	$290,546	0.1%	HOLD
46	EFAISHARES TR	2,984	$289,813	0.1%	HOLD
47	KOCOCA COLA CO	3,802	$289,153	0.1%	HOLD
48	AMZNAMAZON COM INC	1,383	$287,965	0.1%	HOLD
49	PPLPPL CORP	7,485	$285,927	0.1%	HOLD
50	IWNISHARES TR	1,500	$284,385	0.1%	HOLD
51	PEPPEPSICO INC	1,797	$279,056	0.1%	HOLD
52	IJHISHARES TR	4,091	$276,265	0.1%	HOLD
53	IVEISHARES TR	1,308	$276,184	0.1%	TRIM −11%
54	VZVERIZON COMMUNICATIONS INC	5,242	$263,138	0.1%	HOLD
55	MCKMCKESSON CORP	300	$259,608	0.1%	HOLD
56	MCDMCDONALDS CORP	829	$257,693	0.1%	HOLD
57	BSVVANGUARD BD INDEX FDS	3,232	$253,457	0.1%	HOLD
58	CATCATERPILLAR INC	350	$247,961	0.1%	HOLD
59	IJJISHARES TR	1,864	$246,980	0.1%	HOLD
60	MARMARRIOTT INTL INC NEW	702	$229,509	0.1%	HOLD
61	FELVFIDELITY COVINGTON TRUST	6,133	$214,103	0.1%	HOLD
62	DMXFISHARES TR	2,819	$212,717	0.1%	HOLD
63	IJKISHARES TR	1,988	$200,033	0.1%	TRIM −30%
64	ICLNISHARES TR	10,269	$187,826	0.1%	HOLD
65	FORAFORIAN INC	52,657	$109,000	0.1%	HOLD

Position trends· top 15 holdings · shares held over 6 quarters

green added · red trimmed

Security

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

VBVANGUARD INDEX FDS

147K

146K

144K

143K

$37M

VOOVANGUARD INDEX FDS

64K

62K

61K

60K

$36M

VEAVANGUARD TAX-MANAGED FDS

493K

515K

507K

$33M

STXSEAGATE TECHNOLOGY HLDNGS PL

84K

70K

66K

$26M

FNDXSCHWAB STRATEGIC TR

13K

96K

98K

575K

679K

$19M

VOTVANGUARD INDEX FDS

26K

25K

$6M

IVVISHARES TR

$5M

VEUVANGUARD INTL EQUITY INDEX F

53K

52K

53K

52K

$4M

BRK.BBERKSHIRE HATHAWAY INC DEL

$3M

MRNAMODERNA INC

11K

15K

16K

18K

43K

57K

$3M

MTXMINERALS TECHNOLOGIES INC

36K

37K

38K

$3M

GOOGALPHABET INC

$2M

AAPLAPPLE INC

10K

$2M

XOMEXXON MOBIL CORP

$1M

MSFTMICROSOFT CORP

$1M

Shares reported each quarter by the largest current holdings. Green = added vs the prior filing of that name, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

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all 2,366 VB holders →

Firm lineageForm ADV + cited

Where this firm's principals came from and which firms its alumni went on to found.

family tree & personnel →

joins filed 13F data only — no style, strategy or performance similarity is claimed · 13F 2026-Q1

Similar managers — filers whose largest reported GICS sector is the same as this book's (Information Technology), ranked by closeness of reported 13F portfolio value (|log AUM ratio|), self excluded. Two things it is NOT: a style/strategy match, and a performance ranking. Sector weights come from the filed long book only, so a filer whose real business is elsewhere (shorts, private, non-13F assets) can still surface.
Also hold VB — other Section 13(f) filers reporting a long position in this book's largest tickered holding for 2026-Q1. Lagged quarterly filings (up to 45 days after quarter-end); “% of shares out” is omitted where the reported share count can't carry it. % of shares outstanding is not shown for VB: this is a fund line, and we hold no cover-page share count for it at any quarter — a fund's shares outstanding move with creations and redemptions rather than with issuance and buybacks, and it is not the SEC cover-page count this percentage is defined against. The figure is withheld rather than computed against a count that does not exist. Holder share counts are shown as filed.
Filers outside the free plan's window are shown locked rather than hidden, so the list is never silently short.

☆Aufman Associates Inc