Mason Investment Advisory Services, Inc.

CIK 1635007 · EDGAR ↗

sum of disclosed values for 2026-03-31; 0 positions have no disclosed value and are left out of the sum, counted here rather than dropped: $2.2B
every reported holding for this filer and quarter, including ones with no disclosed value: 79
positions with no comparable holding in the prior quarter (kind new), 2026-03-31: 3
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record: 4

Quarter-end snapshot, filed up to 45 days later — not current holdings. What a 13F covers ↓

Changes · Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Position changes into quarter 2026-03-31
The reviewed ticker for the filed issuer name and share class, the same mapping the Reported positions table uses. Symbols are never inferred from names; — means no reviewed mapping.	position matched across quarters by exact reported CUSIP over a registry gap — never a name match	NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE	derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero	reported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated	Prev value	Curr value	Prev shares	Curr shares
—	share class as filed: MSCI USA VALUE · position key `sid:sec:prov:85bbd3b28857c8988aa9b3717f950d84` · issuer key `cusip6:46432F`	TRIM	+$18.8M	−48,186	$642M	$660M	4,693,071	4,644,885
—	share class as filed: US SML CP VALU · position key `sid:sec:prov:3fe659bf87a2644a2d7bd1c1995519a0` · issuer key `cusip6:025072`	TRIM	+$22.9M	−11,740	$290M	$313M	2,844,838	2,833,098
—	share class as filed: FTSE SMCAP ETF · position key `sid:sec:prov:07646ab00566418db3b000ee163a95ee` · issuer key `iss:2480`	TRIM	+$30.9K	−32,484	$278M	$278M	1,937,698	1,905,214
—	share class as filed: INTL SMCP VLU · position key `sid:sec:prov:1a16c94e63bc0be2b7b032875805818f` · issuer key `cusip6:025072`	TRIM	+$8.7M	−55,584	$227M	$236M	2,415,798	2,360,214
—	share class as filed: AVANTIS US SMALL · position key `sid:sec:prov:42d3b075e1e3cf1fc5578a84c64e757b` · issuer key `cusip6:025072`	TRIM	+$11.5M	−21,895	$212M	$223M	3,607,787	3,585,892
—	share class as filed: GROWTH ETF · position key `sid:sec:prov:a92388cca58a72ee9f19e427b7083baa` · issuer key `iss:2465`	ADD	−$17.8M	+224,702	$239M	$221M	5,391,884	5,616,586
—	share class as filed: SM CP VAL ETF · position key `pos:16562` · issuer key `iss:2483`	TRIM	+$1.1M	−2,159	$60.4M	$61.5M	285,194	283,035
—	share class as filed: SHS CREATION UNI · position key `sid:sec:prov:2ebeed7ba0c3c8f5495a6059ae850775` · issuer key `cusip6:14020W`	ADD	−$260K	+14,300	$34.4M	$34.2M	789,138	803,438
—	share class as filed: ENHAN SHRT MA AC · position key `pos:13378` · issuer key `iss:2436`	TRIM	−$2.3M	−23,183	$30.2M	$28.0M	301,338	278,155
—	share class as filed: SHS CREATION UNI · position key `sid:sec:prov:58efed45bb6267776f77c3a3479342e3` · issuer key `cusip6:14019W`	ADD	+$3.0M	+104,326	$20.9M	$23.9M	707,368	811,694
—	share class as filed: SHS CREATION UNI · position key `sid:sec:prov:fbe2069936310c4fd1e930d7bd6a6681` · issuer key `cusip6:14020G`	ADD	+$2.0M	+80,771	$12.6M	$14.7M	284,304	365,075
—	share class as filed: AVANTIS TOTAL EQ · position key `sid:sec:prov:148ea7e854d33ad2a4eef31dc983a7e9` · issuer key `cusip6:02507A`	NEW	+$9.6M	+204,758	$0	$9.6M	—	204,758
—	share class as filed: US TARGETED VLU · position key `sid:sec:prov:beafa1ae0c917b4bc0bad88f645ea4d8` · issuer key `cusip6:25434V`	ADD	+$352K	+30	$7.2M	$7.5M	120,225	120,255
—	share class as filed: GLB EX US ETF · position key `sid:sec:prov:4ae6e5e370779fa3136d4bcb6bdffb76` · issuer key `iss:2480`	TRIM	−$230K	−169	$7.3M	$7.1M	160,296	160,127
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: TR UNIT · position key `pos:11570` · issuer key `iss:1599`	TRIM	−$166K	−1	$3.6M	$3.4M	5,252	5,251
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:14552` · issuer key `iss:711`	TRIM	+$801K	−10	$2.0M	$2.8M	16,284	16,274
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:11717` · issuer key `iss:440`	ADD	+$560K	+11	$1.6M	$2.1M	10,246	10,257
—	share class as filed: GROWTH ETF · position key `pos:11209` · issuer key `iss:2483`	ADD	+$1.0M	+2,492	$815K	$1.8M	1,671	4,163
—	share class as filed: US CORE EQUITY 2 · position key `sid:sec:prov:365ed936e5e9529653cac956d30ecf93` · issuer key `cusip6:25434V`	TRIM	−$43.0K	−377	$1.5M	$1.5M	38,862	38,485
—	share class as filed: SHORT TERM TREAS · position key `sid:sec:prov:5c0159d8e365eac662fab857eba96ecb` · issuer key `iss:2482`	ADD	+$4.1K	+152	$1.5M	$1.5M	25,094	25,246

Flags: no row carries a flag.

1–20 of the 63 changes on this page

Mark-to-market only (no share change) · 20

Positions whose share count is identical in both quarters; the value changed with price, not with a decision.

Positions held with no share change into quarter 2026-03-31
The reviewed ticker for the filed issuer name and share class, the same mapping the Reported positions table uses. Symbols are never inferred from names; — means no reviewed mapping.	position matched across quarters by exact reported CUSIP over a registry gap — never a name match	NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE	derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero	Prev value	Curr value	Prev shares	Curr shares
—	share class as filed: EAFE VALUE ETF · position key `pos:12549` · issuer key `iss:1013`	NO CHANGE	+$97.2K	$2.4M	$2.5M	33,071	33,071
—	share class as filed: FUNDAMENTAL INTL · position key `pos:16724` · issuer key `iss:1633`	NO CHANGE	+$167K	$2.0M	$2.2M	44,934	44,934
—	share class as filed: US MIDCAP FUND · position key `pos:17814` · issuer key `iss:1981`	NO CHANGE	+$7.3K	$1.2M	$1.2M	17,434	17,434
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: UTSER1 S&PDCRP · position key `pos:17758` · issuer key `iss:1605`	NO CHANGE	+$23.7K	$1.1M	$1.1M	1,758	1,758
—	share class as filed: STATE STREET SPD · position key `pos:14221` · issuer key `iss:1602`	NO CHANGE	−$47.8K	$1.0M	$994K	12,988	12,988
—	share class as filed: EAFE SML CP ETF · position key `pos:12710` · issuer key `iss:1013`	NO CHANGE	+$10.4K	$916K	$927K	11,818	11,818
—	share class as filed: STATE STREET SPD · position key `sid:sec:prov:2764f4046d00df682a27bc8a55ad27eb` · issuer key `cusip6:78463X`	NO CHANGE	+$149K	$737K	$885K	11,857	11,857
—	share class as filed: RUS 1000 GRW ETF · position key `pos:11528` · issuer key `iss:1012`	NO CHANGE	−$82.8K	$836K	$753K	1,766	1,766
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12030` · issuer key `iss:525`	NO CHANGE	+$57.8K	$368K	$426K	427	427
—	share class as filed: US LARGECAP DIVD · position key `pos:17905` · issuer key `iss:1981`	NO CHANGE	+$4.7K	$329K	$334K	3,738	3,738
—	share class as filed: INTL HIGH ETF · position key `pos:14012` · issuer key `iss:2479`	NO CHANGE	+$14.9K	$316K	$331K	3,514	3,514
—	share class as filed: INTL QULTY DIV · position key `pos:11353` · issuer key `iss:1982`	NO CHANGE	−$10.4K	$321K	$311K	7,748	7,748
—	share class as filed: CORE S&P TTL STK · position key `pos:11463` · issuer key `iss:1012`	NO CHANGE	−$13.4K	$318K	$304K	2,138	2,138
—	share class as filed: ALLIANZIM US EQT · position key `sid:sec:prov:32446a6fa36e5b4f5c24e7390f2b1627` · issuer key `cusip6:00888H`	NO CHANGE	−$2.4K	$301K	$298K	7,685	7,685
—	share class as filed: CORE S&P US VLU · position key `pos:11640` · issuer key `iss:1012`	NO CHANGE	−$719	$269K	$268K	2,620	2,620
—	share class as filed: STATE STREET SPD · position key `sid:sec:prov:3a2de66daf3bb5bb1372492622dfa328` · issuer key `cusip6:78463X`	NO CHANGE	+$8.5K	$254K	$263K	6,221	6,221
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: SPDR GLD MINIS · position key `pos:14579` · issuer key `iss:1990`	NO CHANGE	+$20.3K	$237K	$257K	2,774	2,774
—	share class as filed: US REIT ETF · position key `pos:12876` · issuer key `iss:1633`	NO CHANGE	+$6.7K	$233K	$240K	11,165	11,165
—	share class as filed: RUS TP200 GR ETF · position key `sid:sec:prov:55519c6ca1e80ac9a362cd98ad4885df` · issuer key `cusip6:464289`	NO CHANGE	−$23.3K	$229K	$206K	828	828
—	share class as filed: COM · position key `pos:16936` · issuer key `iss:2443`	NO CHANGE	−$3.1K	$41.8K	$38.7K	10,000	10,000

Flags: no row carries a flag.

Holdings without a security ID are counted, not compared. Method ↗

Reported positions — 2026-03-31

49 issuers · 79 rows

View

This build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.

This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names.

a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filing

Share of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets.

value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0

—

AMERICAN CENTY ETF TR

3 positions · 3 reported rows

Rows Mason Investment Advisory Services, Inc. reported for AMERICAN CENTY ETF TR, as it reported them
AMERICAN CENTY ETF TR · US SML CP VALU CUSIP 025072877 src ↗	$313M	2,833,098
AMERICAN CENTY ETF TR · INTL SMCP VLU CUSIP 025072802 src ↗	$236M	2,360,214
AMERICAN CENTY ETF TR · AVANTIS US SMALL CUSIP 025072323 src ↗	$223M	3,585,892

ticker not yet mapped

$772M

8,779,204

35.6%

—

ISHARES TR · MSCI USA VALUE CUSIP 46432F388
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$660M

4,644,885

30.5%

—

VANGUARD INTL EQUITY INDEX F

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for VANGUARD INTL EQUITY INDEX F, as it reported them
VANGUARD INTL EQUITY INDEX F · FTSE SMCAP ETF CUSIP 922042718 src ↗	$278M	1,905,214
VANGUARD INTL EQUITY INDEX F · GLB EX US ETF CUSIP 922042676 src ↗	$7.1M	160,127

ticker not yet mapped

$285M

2,065,341

13.2%

—

T ROWE PRICE ETF INC

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for T ROWE PRICE ETF INC, as it reported them
T ROWE PRICE ETF INC · GROWTH ETF CUSIP 87283Q842 src ↗	$221M	5,616,586
T ROWE PRICE ETF INC · NATURAL RES ETF CUSIP 87283Q743 src ↗	$223K	6,367

ticker not yet mapped

$221M

5,622,953

10.2%

—

VANGUARD INDEX FDS

8 positions · 8 reported rows

Rows Mason Investment Advisory Services, Inc. reported for VANGUARD INDEX FDS, as it reported them
VANGUARD INDEX FDS · SM CP VAL ETF CUSIP — src ↗	$61.5M	283,035
VANGUARD INDEX FDS · GROWTH ETF CUSIP — src ↗	$1.8M	4,163
VANGUARD INDEX FDS · TOTAL STK MKT CUSIP — src ↗	$1.1M	3,294
VANGUARD INDEX FDS · VALUE ETF CUSIP — src ↗	$825K	4,203
VANGUARD INDEX FDS · REAL ESTATE ETF CUSIP 922908553 src ↗	$723K	8,147
VANGUARD INDEX FDS · EXTEND MKT ETF CUSIP — src ↗	$669K	3,250
VANGUARD INDEX FDS · LARGE CAP ETF CUSIP — src ↗	$533K	1,782
VANGUARD INDEX FDS · S&P 500 ETF SHS CUSIP 922908363 src ↗	$497K	831

ticker not yet mapped

$67.6M

308,705

3.1%

—

CAPITAL GROUP DIVIDEND VALUE · SHS CREATION UNI CUSIP 14020W106
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$34.2M

803,438

1.6%

—

PIMCO ETF TR · ENHAN SHRT MA AC CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$28.0M

278,155

1.3%

—

CAPITAL GROUP INTL FOCUS EQT · SHS CREATION UNI CUSIP 14019W109
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$23.9M

811,694

1.1%

—

CAPITAL GROUP GROWTH ETF · SHS CREATION UNI CUSIP 14020G101
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$14.7M

365,075

0.7%

—

AMERICAN CENTY ETF TR · AVANTIS TOTAL EQ CUSIP 02507A606
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$9.6M

204,758

0.4%

—

DIMENSIONAL ETF TRUST

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for DIMENSIONAL ETF TRUST, as it reported them
DIMENSIONAL ETF TRUST · US TARGETED VLU CUSIP 25434V609 src ↗	$7.5M	120,255
DIMENSIONAL ETF TRUST · US CORE EQUITY 2 CUSIP 25434V708 src ↗	$1.5M	38,485

ticker not yet mapped

$9.0M

158,740

0.4%

—

ISHARES TR

8 positions · 8 reported rows

Rows Mason Investment Advisory Services, Inc. reported for ISHARES TR, as it reported them
ISHARES TR · RUS 1000 GRW ETF CUSIP — src ↗	$753K	1,766
ISHARES TR · CORE S&P500 ETF CUSIP — src ↗	$712K	1,090
ISHARES TR · CORE S&P MCP ETF CUSIP — src ↗	$494K	7,319
ISHARES TR · RUS 1000 VAL ETF CUSIP — src ↗	$432K	2,022
ISHARES TR · RUS MID CAP ETF CUSIP — src ↗	$417K	4,288
ISHARES TR · TIPS BD ETF CUSIP — src ↗	$360K	3,266
ISHARES TR · CORE S&P TTL STK CUSIP — src ↗	$304K	2,138
ISHARES TR · CORE S&P US VLU CUSIP — src ↗	$268K	2,620

ticker not yet mapped

$3.7M

24,509

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

STATE STR SPDR S&P 500 ETF T · TR UNIT CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$3.4M

5,251

0.2%

—

ISHARES TR

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for ISHARES TR, as it reported them
ISHARES TR · EAFE VALUE ETF CUSIP — src ↗	$2.5M	33,071
ISHARES TR · EAFE SML CP ETF CUSIP — src ↗	$927K	11,818

ticker not yet mapped

$3.4M

44,889

0.2%

—

SCHWAB STRATEGIC TR

3 positions · 3 reported rows

Rows Mason Investment Advisory Services, Inc. reported for SCHWAB STRATEGIC TR, as it reported them
SCHWAB STRATEGIC TR · FUNDAMENTAL INTL CUSIP — src ↗	$2.2M	44,934
SCHWAB STRATEGIC TR · US TIPS ETF CUSIP — src ↗	$328K	12,310
SCHWAB STRATEGIC TR · US REIT ETF CUSIP — src ↗	$240K	11,165

ticker not yet mapped

$2.8M

68,409

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

EXXON MOBIL CORP · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$2.8M

16,274

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CHEVRON CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$2.1M

10,257

0.1%

—

SPDR SERIES TRUST

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for SPDR SERIES TRUST, as it reported them
SPDR SERIES TRUST · STATE STREET SPD CUSIP — src ↗	$994K	12,988
SPDR SERIES TRUST · STATE STREET SPD CUSIP — src ↗	$941K	16,634

ticker not yet mapped

$1.9M

29,622

0.1%

—

VANGUARD SCOTTSDALE FDS

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for VANGUARD SCOTTSDALE FDS, as it reported them
VANGUARD SCOTTSDALE FDS · SHORT TERM TREAS CUSIP 92206C102 src ↗	$1.5M	25,246
VANGUARD SCOTTSDALE FDS · INT-TERM CORP CUSIP — src ↗	$374K	4,517

ticker not yet mapped

$1.9M

29,763

0.1%

—

VANGUARD WORLD FD

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for VANGUARD WORLD FD, as it reported them
VANGUARD WORLD FD · ENERGY ETF CUSIP 92204A306 src ↗	$1.2M	6,667
VANGUARD WORLD FD · MATERIALS ETF CUSIP 92204A801 src ↗	$632K	2,804

ticker not yet mapped

$1.8M

9,471

0.1%

—

WISDOMTREE TR

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for WISDOMTREE TR, as it reported them
WISDOMTREE TR · US MIDCAP FUND CUSIP — src ↗	$1.2M	17,434
WISDOMTREE TR · US LARGECAP DIVD CUSIP — src ↗	$334K	3,738

ticker not yet mapped

$1.5M

21,172

0.1%

—

ISHARES TR

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for ISHARES TR, as it reported them
ISHARES TR · CORE 80/20 AGGRE CUSIP 464289859 src ↗	$1.2M	13,444
ISHARES TR · RUS TP200 GR ETF CUSIP 464289438 src ↗	$206K	828

ticker not yet mapped

$1.4M

14,272

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

APPLE INC · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$1.3M

4,968

0.1%

—

SPDR INDEX SHS FDS

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for SPDR INDEX SHS FDS, as it reported them
SPDR INDEX SHS FDS · STATE STREET SPD CUSIP 78463X541 src ↗	$885K	11,857
SPDR INDEX SHS FDS · STATE STREET SPD CUSIP 78463X871 src ↗	$263K	6,221

ticker not yet mapped

$1.1M

18,078

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

STATE STR SPDR S&P MIDCAP 40 · UTSER1 S&PDCRP CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$1.1M

1,758

0.1%

—

VANGUARD WHITEHALL FDS

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for VANGUARD WHITEHALL FDS, as it reported them
VANGUARD WHITEHALL FDS · HIGH DIV YLD CUSIP — src ↗	$649K	4,384
VANGUARD WHITEHALL FDS · INTL HIGH ETF CUSIP — src ↗	$331K	3,514

ticker not yet mapped

$980K

7,898

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ALPHABET INC

2 positions · 2 reported rows

Rows Mason Investment Advisory Services, Inc. reported for ALPHABET INC, as it reported them
ALPHABET INC · CAP STK CL C CUSIP — src ↗	$532K	1,856
ALPHABET INC · CAP STK CL A CUSIP — src ↗	$441K	1,534

$974K

3,390

0.0%

—

VANGUARD SPECIALIZED FUNDS · DIV APP ETF CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$959K

4,459

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MICROSOFT CORP · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$799K

2,158

0.0%

—

VANGUARD MUN BD FDS · TAX EXEMPT BD CUSIP 922907746
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$764K

15,319

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ALBERTSONS COS INC · COMMON STOCK CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$719K

42,219

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ARISTA NETWORKS INC · COM SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$608K

4,955

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

COSTCO WHOLESALE CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$426K

427

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

AMAZON COM INC · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$348K

1,670

0.0%

—

SELECT SECTOR SPDR TR · STATE STREET ENE CUSIP 81369Y506
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$326K

5,317

0.0%

—

WISDOMTREE TR · INTL QULTY DIV CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$311K

7,748

0.0%

—

VANGUARD TAX-MANAGED FDS · VAN FTSE DEV MKT CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$309K

4,823

0.0%

—

AIM ETF PRODUCTS TRUST · ALLIANZIM US EQT CUSIP 00888H406
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$298K

7,685

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

HOME DEPOT INC · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$269K

819

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ELI LILLY & CO · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$262K

285

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

WORLD GOLD TR · SPDR GLD MINIS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$257K

2,774

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

VISA INC · COM CL A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$239K

792

0.0%

—

INVESCO EXCHANGE TRADED FD T · DORSEY WRGT BASC CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$231K

1,931

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

INGREDION INC · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$231K

2,051

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BERKSHIRE HATHAWAY INC DEL · CL B NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$230K

481

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

INTUIT · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$217K

503

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TAIWAN SEMICONDUCTOR MANUFAC · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$203K

601

0.0%

—

VANGUARD WELLINGTON FD · SHORT TRM TAX EX CUSIP 921935870
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$200K

1,979

0.0%

—

PRECIGEN INC · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$38.7K

10,000

0.0%

1–20 of 49 issuers

One line per issuer, largest first — open a line for its reported rows. Grouping ↗

Book shape

Tick = median of the 8,748 tracked filers with a 2026-03-31 book (the index median: the 8,662 with a complete book). Concentration uses reported 13F long value, not total assets; the index is withheld when any position lacks a value.

share of the period's disclosed value held in the top-N positions; denominator is reported 13F value, not total assets: 98.8%above median 80.0%
integer Herfindahl–Hirschman index in basis points over disclosed position values: 1,646 bpsabove median 446 bps
holdings with no disclosed value (undisclosed, or unreadable on the filing) — kept and counted, never shown as zero: 79 / 79median book 97.5 positions

83 quarter-over-quarter rows

Filing history

Available filing periods
Period	Source
2026-03-31	EDGAR ↗

Complete source filings on SEC EDGAR

The filing on EDGAR is the record, including any filed after this build.

Open Mason Investment Advisory Services, Inc.'s 13F filings on SEC EDGAR ↗

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.

Changes · Q1 2026Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Reported positions — 2026-03-31

Book shape

Filing history

Changes · Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.