One Charles Private Wealth Services, LLC — 13F Holdings & Portfolio
CIK 1800938 · latest 13F-HR filed 2026-07-15
One Charles Private Wealth Services, LLC manages $434.5M in 13F-reported U.S. long-equity assets across 177 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are BRK.B (10.70%), TPL (7.12%), INFL (5.56%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 22 new positions and exited 5; 78 existing positions rose in reported value and 46 fell.
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
$434.5M
Long-equity book
Holdings
177
Distinct positions
Period
2026-06-30
Filed 2026-07-15
Q/Q Activity
+22 / −5 / ↑78 / ↓46
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q2 26BRK.B10.7% · -4%TPL7.1% · -6%INFL5.6% · -2%VTV5.2% · +4%VUG4.4% · +523%LB4.1% · -5%SAMT3.4% · +3%JAAA3.4% · -2%XLK2.8% · -0%GBTC2.7% · -6%SCHG2.1% · -1%JSI2.1% · -3%AAPL2.0% · -2%VGT1.8% · +709%LRCX1.8% · -2%TXUE1.6% · -1%SCHB1.5% · 0%FRDM1.4% · newACVA1.3% · -0%ARKK1.3% · -2%VIG1.1% · +3%NVDA1.1% · +4%MIAX1.0% · newJPM0.9% · +0%IVV0.9% · -1%ET0.8% · -0%XLV0.8% · +0%BTC0.7% · -1%GOOGL0.7% · +1%IEFA0.6% · +62%XLF0.6% · -3%AMZN0.6% · -1%MSFT0.6% · +5%RTX0.6% · +0%SPY0.6% · +5%VBK0.6% · -0%BAC0.6% · -19%VBR0.5% · -0%XLC0.5% · -7%SLV0.5% · -9%EPD0.5% · -20%IWM0.5% · -3%GLDM0.5% · -2%VTI0.4% · +3%VIS0.4% · -0%IRM0.4% · -3%SCHD0.4% · 0%META0.4% · +4%ARKB0.4% · +1%GOOG0.4% · +0%XOM0.4% · +0%XLY0.4% · -12%MPLX0.4% · -3%VOX0.3% · +0%VFH0.3% · -13%VDC0.3% · -8%VHT0.3% · -16%IYF0.3% · -3%RSPT0.3% · -38%VCR0.3% · +4%
Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q1 26 → Q2 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
3 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 49.6%Cumulative share of the portfolio held in the largest N positions.
Firm Profile & Key People
As of the firm’s regulatory filing dated May 14, 2026.
Assets Under Management
$1.09B
Discretionary
$882.8M
Employees
7
Accounts
376
Address
99 DERBY STREET
SUITE 100
HINGHAM, MA 02043
SUITE 100
HINGHAM, MA 02043
Phone
(617) 337-4208
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| FOCUS OPERATING, LLC Control | MEMBER (MANAGER) since Feb 2017 | 75% or more | Domestic Entity |
| SQUARCIA, PAUL, ANDREW Control | FOUNDING PARTNER AND CCO since Feb 2017 | Less than 5% | Individual |
| WALLIN, ERIK, RANDALL Control | LEAD ADVISOR since Jul 2019 | Less than 5% | Individual |
| CD&R FERDINAND CO-INVESTOR, L.P. Control Indirect owner via CD&R FERDINAND HOLDINGS, L.P | PARTNER since Aug 2023 | 25–50% | Foreign Entity |
| CD&R FERDINAND HOLDINGS, L.P Control Indirect owner via FERDINAND FFP ULTIMATE HOLDINGS, LP | PARTNER since Aug 2023 | 50–75% | Domestic Entity |
| CLAYTON, DUBILIER & RICE FUND XII, L.P Control Indirect owner via CD&R FERDINAND HOLDINGS, L.P | PARTNER since Aug 2023 | 50–75% | Foreign Entity |
| FERDINAND FFP ACQUISITION, LLC Control Indirect owner via FOCUS FINANCIAL PARTNERS INC. | SHAREHOLDER, CLASS A COMMON STOCK since Aug 2023 | 75% or more | Domestic Entity |
| FERDINAND FFP INTERMEDIATE HOLDINGS, LLC Control Indirect owner via FERDINAND FFP ACQUISITION, LLC | MEMBER since Aug 2023 | 75% or more | Domestic Entity |
| FERDINAND FFP PARENT, INC Control Indirect owner via FERDINAND FFP INTERMEDIATE HOLDINGS, LLC | MEMBER since Aug 2023 | 75% or more | Domestic Entity |
| FERDINAND FFP ULTIMATE HOLDINGS, LP Control Indirect owner via FOCUS FINANCIAL PARTNERS INC. | SHAREHOLDER, CLASS B COMMON STOCK since Aug 2023 | 75% or more | Domestic Entity |
| FERDINAND FFP ULTIMATE HOLDINGS, LP Control Indirect owner via FERDINAND FFP PARENT, INC | SHAREHOLDER since Aug 2023 | 75% or more | Foreign Entity |
| FOCUS FINANCIAL PARTNERS INC. Control Indirect owner via FOCUS FINANCIAL PARTNERS, LLC | MEMBER since Jul 2018 | 50–75% | Domestic Entity |
| FOCUS FINANCIAL PARTNERS, LLC Control Indirect owner via FOCUS OPERATING, LLC | MEMBER since Jan 2007 | 75% or more | Domestic Entity |
Ownership & leadership changes · 11 filings with changes since Feb 3, 2017
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
Mar 30, 2026 filing
- ChangedFOCUS FINANCIAL PARTNERS INC. · indirect via FOCUS FINANCIAL PARTNERS, LLC: ownership 75% or more → 50–75%
Mar 28, 2024 filing
- ChangedFOCUS FINANCIAL PARTNERS INC. · indirect via FOCUS FINANCIAL PARTNERS, LLC: title MANAGING MEMBER → MEMBER
Sep 26, 2023 filing
- ChangedFOCUS FINANCIAL PARTNERS INC. · indirect via FOCUS FINANCIAL PARTNERS, LLC: title MEMBER → MANAGING MEMBER
Sep 21, 2023 filing
- AddedCD&R FERDINAND CO-INVESTOR, L.P. · PARTNER · 25–50% · indirect via CD&R FERDINAND HOLDINGS, L.P · control person
- AddedCD&R FERDINAND HOLDINGS, L.P · PARTNER · 50–75% · indirect via FERDINAND FFP ULTIMATE HOLDINGS, LP · control person
- AddedCLAYTON, DUBILIER & RICE FUND XII, L.P · PARTNER · 50–75% · indirect via CD&R FERDINAND HOLDINGS, L.P · control person
- AddedFERDINAND FFP ACQUISITION, LLC · SHAREHOLDER, CLASS A COMMON STOCK · 75% or more · indirect via FOCUS FINANCIAL PARTNERS INC. · control person
- AddedFERDINAND FFP INTERMEDIATE HOLDINGS, LLC · MEMBER · 75% or more · indirect via FERDINAND FFP ACQUISITION, LLC · control person
- AddedFERDINAND FFP PARENT, INC · MEMBER · 75% or more · indirect via FERDINAND FFP INTERMEDIATE HOLDINGS, LLC · control person
- AddedFERDINAND FFP ULTIMATE HOLDINGS, LP · SHAREHOLDER, CLASS B COMMON STOCK · 75% or more · indirect via FOCUS FINANCIAL PARTNERS INC. · control person
- AddedFERDINAND FFP ULTIMATE HOLDINGS, LP · SHAREHOLDER · 75% or more · indirect via FERDINAND FFP PARENT, INC · control person
Oct 30, 2020 filing
- No longer listedABBASS, SUSAN, ELAINE · CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Jul 2019
- No longer listedDOUMA, TODD, MACARTHUR · LEAD ADVISOR · Less than 5% · control person · listed since Jul 2019
- No longer listedLYONS, GAVIN, DAVID · CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Jul 2019
- No longer listedNEELEY, STEVEN, EUGENE · CHIEF INVESTMENT OFFICER · Less than 5% · control person · listed since Jul 2019
- ChangedSQUARCIA, PAUL, ANDREW · title FOUNDING PARTNER → FOUNDING PARTNER AND CCO
Aug 29, 2019 filing
- ChangedDOUMA, TODD, MACARTHUR · title PRINCIPAL & SENIOR ADVISER → LEAD ADVISOR
- ChangedWALLIN, ERIK, RANDALL · title MANAGING PARTNER → LEAD ADVISOR
Jul 1, 2019 filing
- AddedABBASS, SUSAN, ELAINE · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- AddedDOUMA, TODD, MACARTHUR · PRINCIPAL & SENIOR ADVISER · Less than 5% · control person
- AddedLYONS, GAVIN, DAVID · CHIEF OPERATING OFFICER · Less than 5% · control person
- AddedNEELEY, STEVEN, EUGENE · CHIEF INVESTMENT OFFICER · Less than 5% · control person
- ChangedSQUARCIA, PAUL, ANDREW · title CHIEF COMPLIANCE OFFICER, FOUNDING PARTNER → FOUNDING PARTNER
Mar 27, 2019 filing
- No longer listedCOREY, HOWARD, PERKINS · CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Jan 2018
Aug 17, 2018 filing
- No longer listedTRIDENT FFP BLOCKER LLC · LIMITED PARTNER · 25–50% · indirect via TRIDENT FFP, L.P. · control person · listed since May 2017
- No longer listedTRIDENT FFP, L.P. · MEMBER · 25–50% · indirect via FOCUS FINANCIAL PARTNERS, LLC · control person · listed since Jul 2017
- No longer listedTRIDENT VI PARALLEL FUND, L.P. · MEMBER · 75% or more · indirect via TRIDENT FFP BLOCKER LLC · control person · listed since Apr 2017
- No longer listedTRIDENT VI, L.P. · LIMITED PARTNER · 25–50% · indirect via TRIDENT FFP, L.P. · control person · listed since May 2017
- AddedFOCUS FINANCIAL PARTNERS INC. · MEMBER · 75% or more · indirect via FOCUS FINANCIAL PARTNERS, LLC · control person
Mar 28, 2018 filing
- No longer listedDesmarais, Pamela, Anne · CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Feb 2017
- AddedCOREY, HOWARD, PERKINS · CHIEF OPERATING OFFICER · Less than 5% · control person
Older changes (2 more filings)
Aug 2, 2017 filing
- No longer listedCP FALCON AIV, L.P. · MEMBER · 25–50% · indirect via FOCUS FINANCIAL PARTNERS, LLC · control person · listed since Oct 2013
- AddedTRIDENT FFP BLOCKER LLC · LIMITED PARTNER · 25–50% · indirect via TRIDENT FFP, L.P. · control person
- AddedTRIDENT FFP, L.P. · MEMBER · 25–50% · indirect via FOCUS FINANCIAL PARTNERS, LLC · control person
- AddedTRIDENT VI PARALLEL FUND, L.P. · MEMBER · 75% or more · indirect via TRIDENT FFP BLOCKER LLC · control person
- AddedTRIDENT VI, L.P. · LIMITED PARTNER · 25–50% · indirect via TRIDENT FFP, L.P. · control person
Feb 3, 2017 filing (earliest on record)
- ListedCP FALCON AIV, L.P. · MEMBER · 25–50% · indirect via FOCUS FINANCIAL PARTNERS, LLC · control person
- ListedDesmarais, Pamela, Anne · CHIEF OPERATING OFFICER · Less than 5% · control person
- ListedFOCUS FINANCIAL PARTNERS, LLC · MEMBER · 75% or more · indirect via FOCUS OPERATING, LLC · control person
- ListedFOCUS OPERATING, LLC · MEMBER (MANAGER) · 75% or more · control person
- ListedSQUARCIA, PAUL, ANDREW · CHIEF COMPLIANCE OFFICER, FOUNDING PARTNER · Less than 5% · control person
- ListedWALLIN, ERIK, RANDALL · MANAGING PARTNER · Less than 5% · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- LAM RESEARCH CORP$3.8M +99.4%
- SELECT SECTOR SPDR TR$3.7M +42.9%
- VANGUARD INDEX FDS$3.5M +22.8%
- VANGUARD INDEX FDS$3.1M +16.1%
- ADVISORS INNER CIRCLE FD III$3.0M +24.7%
Top Trims
- TEXAS PACIFIC LAND CORPORATI-$4.9M -13.7%
- ISHARES INC-$3.6M -92.2%
- GRAYSCALE BITCOIN TRUST ETF-$2.8M -19.1%
- LISTED FDS TR-$1.6M -6.4%
- ISHARES SILVER TR-$834.5K -28.3%
New Positions
- EA SERIES TRUST$6.0M
- MIAMI INTL HLDGS INC$4.4M
- GOLUB CAP BDC INC$491.5K
- ISHARES TR$417.4K
- SPACE EXPLORATION TECHN CORP$319.5K
Exited Positions
- HOLOGIC INC$428.6K
- HONEYWELL INTL INC$408.2K
- INVESCO EXCHANGE TRADED FD T$304.1K
- FIRST TR EXCHANGE-TRADED FD$247.4K
- PFIZER INC$202.3K
One Charles Private Wealth Services, LLC Holdings (2026-06-30)
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 | BERKSHIRE HATHAWAY INC DEL | BRK.B | 084670702 | $46.5M | 10.70% | 92,896 | SH |
| 2 | TEXAS PACIFIC LAND CORPORATI | TPL | 88262P102 | $30.9M | 7.12% | 70,698 | SH |
| 3 | LISTED FDS TR | INFL | 53656F623 | $24.2M | 5.56% | 484,447 | SH |
| 4 | VANGUARD INDEX FDS | VTV | 922908744 | $22.7M | 5.22% | 104,141 | SH |
| 5 | VANGUARD INDEX FDS | VUG | 922908736 | $19.0M | 4.36% | 220,144 | SH |
| 6 | LANDBRIDGE COMPANY LLC | LB | 514952100 | $17.8M | 4.09% | 224,152 | SH |
| 7 | ADVISORS INNER CIRCLE FD III | SAMT | 00775Y645 | $15.0M | 3.44% | 313,351 | SH |
| 8 | JANUS DETROIT STR TR | JAAA | 47103U845 | $14.9M | 3.42% | 294,351 | SH |
| 9 | SELECT SECTOR SPDR TR | XLK | 81369Y803 | $12.4M | 2.85% | 64,884 | SH |
| 10 | GRAYSCALE BITCOIN TRUST ETF | GBTC | 389637109 | $11.8M | 2.72% | 259,750 | SH |
| 11 | SCHWAB STRATEGIC TR | SCHG | 808524300 | $9.2M | 2.12% | 271,918 | SH |
| 12 | JANUS DETROIT STR TR | JSI | 47103U746 | $9.0M | 2.08% | 176,717 | SH |
| 13 | APPLE INC | AAPL | 037833100 | $8.5M | 1.96% | 29,466 | SH |
| 14 | VANGUARD WORLD FD | VGT | 92204A702 | $7.6M | 1.76% | 63,908 | SH |
| 15 | LAM RESEARCH CORP | LRCX | 512807306 | $7.6M | 1.75% | 17,526 | SH |
| 16 | THORNBURG ETF TR | TXUE | 88521L306 | $7.0M | 1.61% | 202,964 | SH |
| 17 | SCHWAB STRATEGIC TR | SCHB | 808524102 | $6.5M | 1.50% | 225,062 | SH |
| 18 | EA SERIES TRUST | FRDM | 02072L607 | $6.0M | 1.39% | 82,719 | SH |
| 19 | ACV AUCTIONS INC | ACVA | 00091G104 | $5.6M | 1.29% | 779,768 | SH |
| 20 | ARK ETF TR | ARKK | 00214Q104 | $5.6M | 1.29% | 69,288 | SH |
| 21 | VANGUARD SPECIALIZED FUNDS | VIG | 921908844 | $5.0M | 1.14% | 20,974 | SH |
| 22 | NVIDIA CORPORATION | NVDA | 67066G104 | $4.6M | 1.06% | 22,960 | SH |
| 23 | MIAMI INTL HLDGS INC | MIAX | 59356Q108 | $4.4M | 1.01% | 118,419 | SH |
| 24 | JPMORGAN CHASE & CO | JPM | 46625H100 | $4.1M | 0.95% | 12,551 | SH |
| 25 | ISHARES TR | IVV | 464287200 | $4.0M | 0.93% | 5,379 | SH |
| 26 | ENERGY TRANSFER L P | ET | 29273V100 | $3.6M | 0.82% | 186,850 | SH |
| 27 | SELECT SECTOR SPDR TR | XLV | 81369Y209 | $3.3M | 0.75% | 20,638 | SH |
| 28 | GRAYSCALE BITCOIN MINI TR ET | BTC | 389930207 | $3.2M | 0.74% | 123,284 | SH |
| 29 | ALPHABET INC | GOOGL | 02079K305 | $2.9M | 0.66% | 8,061 | SH |
| 30 | ISHARES TR | IEFA | 46432F842 | $2.8M | 0.64% | 28,582 | SH |
| 31 | SELECT SECTOR SPDR TR | XLF | 81369Y605 | $2.7M | 0.61% | 49,814 | SH |
| 32 | AMAZON COM INC | AMZN | 023135106 | $2.7M | 0.61% | 11,189 | SH |
| 33 | MICROSOFT CORP | MSFT | 594918104 | $2.5M | 0.58% | 6,699 | SH |
| 34 | RTX CORPORATION | RTX | 75513E101 | $2.5M | 0.57% | 13,163 | SH |
| 35 | STATE STR SPDR S&P 500 ETF T | SPY | 78462F103 | $2.5M | 0.57% | 3,308 | SH |
| 36 | VANGUARD INDEX FDS | VBK | 922908595 | $2.5M | 0.57% | 6,731 | SH |
| 37 | BANK OF AMER CORP | BAC | 060505104 | $2.4M | 0.55% | 41,893 | SH |
| 38 | VANGUARD INDEX FDS | VBR | 922908611 | $2.4M | 0.55% | 9,756 | SH |
| 39 | SELECT SECTOR SPDR TR | XLC | 81369Y852 | $2.2M | 0.51% | 20,549 | SH |
| 40 | ISHARES SILVER TR | SLV | 46428Q109 | $2.1M | 0.49% | 39,592 | SH |
| 41 | ENTERPRISE PRODS PARTNERS L | EPD | 293792107 | $2.1M | 0.48% | 56,643 | SH |
| 42 | ISHARES TR | IWM | 464287655 | $2.0M | 0.45% | 6,518 | SH |
| 43 | WORLD GOLD TR | GLDM | 98149E303 | $2.0M | 0.45% | 24,604 | SH |
| 44 | VANGUARD INDEX FDS | VTI | 922908769 | $1.9M | 0.45% | 5,265 | SH |
| 45 | VANGUARD WORLD FD | VIS | 92204A603 | $1.9M | 0.44% | 5,344 | SH |
| 46 | IRON MTN INC DEL | IRM | 46284V101 | $1.8M | 0.42% | 14,538 | SH |
| 47 | SCHWAB STRATEGIC TR | SCHD | 808524797 | $1.8M | 0.41% | 56,849 | SH |
| 48 | META PLATFORMS INC | META | 30303M102 | $1.7M | 0.40% | 3,066 | SH |
| 49 | ARK 21SHARES BITCOIN ETF | ARKB | 040919102 | $1.7M | 0.40% | 88,282 | SH |
| 50 | ALPHABET INC | GOOG | 02079K107 | $1.7M | 0.39% | 4,847 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-07-15 | $434.5M | 177 | 0001765380-26-000218 |
| 2026-03-31 | 2026-05-07 | $399.7M | 160 | 0001765380-26-000189 |
| 2025-12-31 | 2026-02-06 | $386.8M | 172 | 0001765380-26-000074 |
Filer Information
Address
99 DERBY STREETSUITE 101
HINGHAM, MA 02043
Phone
(617) 337-4208
Filing Manager
One Charles Private Wealth Services, LLC
HINGHAM, MA
Signatory
PAUL SQUARCIA
Chief Compliance Officer