MASECO LLP — 13F Holdings & Portfolio
CIK 2074052 · latest 13F-HR filed 2026-04-21
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
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AUM
$3.19B
Long-equity book
Holdings
391
Distinct positions
Period
2026-03-31
Filed 2026-04-21
Q/Q Activity
+55 / −207 / ↑99 / ↓137
vs 2025-12-31
Firm Profile & Key People
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- DIMENSIONAL ETF TRUST$24.6M +13.4%
- VANGUARD SCOTTSDALE FDS$18.9M +5.1%
- DIMENSIONAL ETF TRUST$15.4M +22.8%
- DIMENSIONAL ETF TRUST$14.2M +21.0%
- DIMENSIONAL ETF TRUST$13.4M +13.5%
Top Trims
- VANGUARD SCOTTSDALE FDS-$2.6M -9.1%
- VANGUARD INDEX FDS-$1.7M -7.3%
- ISHARES INC-$1.2M -24.0%
- ALPHABET INC-$1.0M -76.4%
- NVIDIA CORPORATION-$961.5K -75.1%
New Positions
- AMERICAN CENTY ETF TR$259.9M
- AMERICAN CENTY ETF TR$166.2M
- AMERICAN CENTY ETF TR$95.6M
- AMERICAN CENTY ETF TR$93.5M
- AMERICAN CENTY ETF TR$91.6M
Exited Positions
- NETEASE INC$277.6K
- AMERIPRISE FINL INC$221.1K
- SPDR S&P MIDCAP 400 ETF TR$146.3K
- VANGUARD SCOTTSDALE FDS$136.5K
- GE VERNOVA INC$122.3K
All Holdings
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | DIMENSIONAL ETF TRUST | DFUS | 25434V401 | $530.9M | 16.65% | 7,486,563 | SH |
| 2 | VANGUARD SCOTTSDALE FDS | VGIT | 92206C706 | $386.5M | 12.12% | 6,491,988 | SH |
| 3 | AMERICAN CENTY ETF TR | AVUS | 025072885 | $259.9M | 8.15% | 2,338,277 | SH |
| 4 | DIMENSIONAL ETF TRUST | DFGP | 25434V583 | $207.9M | 6.52% | 3,850,637 | SH |
| 5 | AMERICAN CENTY ETF TR | AVDE | 025072703 | $166.2M | 5.21% | 1,957,771 | SH |
| 6 | DIMENSIONAL ETF TRUST | DFIC | 25434V799 | $112.6M | 3.53% | 3,168,524 | SH |
| 7 | DIMENSIONAL ETF TRUST | DFUV | 25434V724 | $97.9M | 3.07% | 2,021,042 | SH |
| 8 | DIMENSIONAL ETF TRUST | DFSB | 25434V674 | $96.0M | 3.01% | 1,856,701 | SH |
| 9 | AMERICAN CENTY ETF TR | AVSU | 025072281 | $95.6M | 3.00% | 1,292,915 | SH |
| 10 | AMERICAN CENTY ETF TR | AVEM | 025072604 | $93.5M | 2.93% | 1,160,605 | SH |
| 11 | AMERICAN CENTY ETF TR | AVSF | 025072687 | $91.6M | 2.87% | 1,955,930 | SH |
| 12 | DIMENSIONAL ETF TRUST | DFAI | 25434V203 | $88.3M | 2.77% | 2,267,385 | SH |
| 13 | DIMENSIONAL ETF TRUST | DFSU | 25434V716 | $83.3M | 2.61% | 2,024,355 | SH |
| 14 | DIMENSIONAL ETF TRUST | DFAU | 25434V104 | $82.9M | 2.60% | 1,838,563 | SH |
| 15 | DIMENSIONAL ETF TRUST | DFAC | 25434V708 | $82.1M | 2.57% | 2,112,163 | SH |
| 16 | ISHARES TR | STIP | 46429B747 | $80.1M | 2.51% | 774,850 | SH |
| 17 | DIMENSIONAL ETF TRUST | DFEM | 25434V732 | $77.5M | 2.43% | 2,245,751 | SH |
| 18 | DIMENSIONAL ETF TRUST | DFIV | 25434V807 | $53.7M | 1.68% | 1,017,209 | SH |
| 19 | AMERICAN CENTY ETF TR | AVSD | 025072299 | $51.7M | 1.62% | 701,841 | SH |
| 20 | DIMENSIONAL ETF TRUST | DFAE | 25434V302 | $47.4M | 1.49% | 1,399,794 | SH |
| 21 | DIMENSIONAL ETF TRUST | DFSI | 25434V690 | $41.8M | 1.31% | 987,534 | SH |
| 22 | DIMENSIONAL ETF TRUST | DFGR | 25434V658 | $41.3M | 1.30% | 1,556,109 | SH |
| 23 | ISHARES TR | SHV | 464288679 | $36.7M | 1.15% | 332,850 | SH |
| 24 | DIMENSIONAL ETF TRUST | DFSD | 25434V864 | $35.4M | 1.11% | 738,839 | SH |
| 25 | AMERICAN CENTY ETF TR | AVSE | 025072315 | $29.0M | 0.91% | 435,371 | SH |
| 26 | VANGUARD SCOTTSDALE FDS | VGSH | 92206C102 | $26.0M | 0.82% | 444,321 | SH |
| 27 | DIMENSIONAL ETF TRUST | DFSE | 25434V682 | $24.9M | 0.78% | 588,403 | SH |
| 28 | VANGUARD INDEX FDS | VOO | 922908363 | $21.3M | 0.67% | 35,683 | SH |
| 29 | DIMENSIONAL ETF TRUST | DFAS | 25434V500 | $20.5M | 0.64% | 287,640 | SH |
| 30 | ISHARES TR | IVV | 464287200 | $10.6M | 0.33% | 16,273 | SH |
| 31 | DIMENSIONAL ETF TRUST | DFAW | 25434V617 | $10.4M | 0.33% | 141,602 | SH |
| 32 | STATE STR SPDR S&P 500 ETF T | SPY | 78462F103 | $7.1M | 0.22% | 10,924 | SH |
| 33 | VANGUARD INDEX FDS | VTI | 922908769 | $5.5M | 0.17% | 17,187 | SH |
| 34 | MANAGER DIRECTED PORTFOLIOS | VGSR | 56170L695 | $5.2M | 0.16% | 501,057 | SH |
| 35 | ALPHABET INC | GOOG | 02079K107 | $4.5M | 0.14% | 15,711 | SH |
| 36 | VANGUARD WHITEHALL FDS | VYM | 921946406 | $4.2M | 0.13% | 28,634 | SH |
| 37 | JPMORGAN CHASE & CO | JPM | 46625H100 | $4.0M | 0.12% | 13,534 | SH |
| 38 | ISHARES INC | LEMB | 464286517 | $4.0M | 0.12% | 96,818 | SH |
| 39 | ISHARES TR | SGOV | 46436E718 | $3.9M | 0.12% | 38,611 | SH |
| 40 | ISHARES TR | IGSB | 464288646 | $3.0M | 0.09% | 56,655 | SH |
| 41 | ISHARES TR | USHY | 46435U853 | $2.6M | 0.08% | 71,666 | SH |
| 42 | ISHARES TR | IEFA | 46432F842 | $2.5M | 0.08% | 27,608 | SH |
| 43 | SCHWAB STRATEGIC TR | FNDX | 808524771 | $2.2M | 0.07% | 80,446 | SH |
| 44 | VANGUARD INTL EQUITY INDEX F | VWO | 922042858 | $2.2M | 0.07% | 41,090 | SH |
| 45 | VANECK ETF TRUST | GDX | 92189F106 | $2.2M | 0.07% | 24,069 | SH |
| 46 | VANGUARD WHITEHALL FDS | VYMI | 921946794 | $2.2M | 0.07% | 23,159 | SH |
| 47 | VANGUARD TAX-MANAGED FDS | VEA | 921943858 | $2.1M | 0.07% | 32,940 | SH |
| 48 | APPLE INC | AAPL | 037833100 | $1.9M | 0.06% | 7,304 | SH |
| 49 | SPDR SERIES TRUST | SPYX | 78468R796 | $1.8M | 0.06% | 34,150 | SH |
| 50 | VANGUARD INDEX FDS | VV | 922908637 | $1.8M | 0.05% | 5,869 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-04-21 | $3.19B | 391 | 0002074052-26-000004 |
| 2025-12-31 | 2026-01-22 | $2.30B | 543 | 0002074052-26-000001 |