Arkolith/Funds/Shelter Rock Management, LLC

Shelter Rock Management, LLC

CIK 2109305
Holdings as of Jun 30, 2026·disclosed Jul 13, 2026·~13-day 13F lag·13F-HR
Active Filer

Shelter Rock Management, LLC holds a focused book of 37 reported positions worth $103.1M as of Q2 2026 (disclosed Jul 13, 2026, a ~13-day 13F lag). This quarter they opened SS Industrial Select Sector and trimmed Taiwan Semiconductor-SP ADR. Their largest long position is Taiwan Semiconductor-SP ADR at 11% of the reported non-option book. Cloning the disclosed picks since 2026 would be +7% (+11.5%/yr). That is a simulation of the disclosed long book, not audited returns.

Growth of $10,000: cloning the disclosed book

If you'd copied them
+6.6%
+11.5%/yr · since Feb '26
Their reported book
+1.7%
held from quarter-end
S&P 500
+10.7%
same window
$9K$10K$10K$11K$11KFeb '26Mar '26May '26Jun '26Jul '26Sep '26
Shelter Rock Management, LLC (copied at disclosure) S&P 500

Following at the filing date actually beat the quarter-end book by 4.9 points over this window.

Growth of $10,000 cloning Shelter Rock Management, LLC's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~13 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.

How much sits in the biggest positions

Top-heavy: focused book

Top 5 holdings
43%
Top 10 holdings
71%
Top 20 holdings
94%

Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.

Where the money is, by sector

93% mapped to company sectors

Information Technology
47%
Consumer Discretionary
27%
Industrials
8%
Financials
8%
ETFs / funds
7%
Utilities
1%
Health Care
1%

+1 sector below the cut, under 0.5% together

Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.

Biggest moves: latest quarter

Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis

Bought
Trimmed / exited

Funds with the most overlap

Other tracked managers holding the same core names as Shelter Rock Management, LLC

Manager / fundShared namesTheir $ in those
Altarock Partners LP7 / 37$4.1B
Hoffman, Alan N Investment Management6 / 37$155.2M
Prospect Hill Management, LLC6 / 37$226.7M
Voyager Global Management LP5 / 37$3.0B
Ketron Financial12 / 37$266.9M
Blacksheep Fund Management Ltd4 / 37$252.3M
BlueSpruce Investments, LP10 / 37$508.0M
Emerald Advisors, LLC18 / 37$620.4M

Ranked by the share of each fund's own book sitting in the names it shares with Shelter Rock Management, LLC: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.

Holdings: largest first

Bars show each position's share of the portfolio. Click a row for its position history.

37 positions
#SecurityValueShares% PortLast moveHistory
1Taiwan Semiconductor Manufac
SPONSORED ADS
$11.2M23.5K
10.9%
−0.5%
Reduced · −116 sh
2Alphabet Inc
CAP STK CL A
$10.1M28.2K
9.8%
+0.7%
Added · +184 sh
3Transdigm Group Inc
COM
$8.1M6.1K
7.9%
+0.3%
Added · +19 sh
4Hilton Worldwide Hldgs Inc
COM
$7.6M23.1K
7.4%
+1.1%
Added · +250 sh
5Oreilly Automotive Inc
COM
$7.4M80.3K
7.2%
−0.1%
Reduced · −71 sh
6Nvidia Corporation
COM
$7.2M35.9K
7.0%
−14%
Reduced · −6K sh
7Visa Inc
COM CL A
$6.1M17.8K
5.9%
+0.4%
Added · +67 sh
8Trane Technologies PLC
SHS
$5.5M11.3K
5.4%
−14%
Reduced · −2K sh
9TJX Cos Inc New
COM
$4.8M31.9K
4.7%
+0.7%
Added · +217 sh
10Flex Ltd
ORD
$4.8M29.5K
4.6%
−38%
Reduced · −18K sh
11Select Sector SPDR TR
ST STR INDL ETF
$4.6M24.9K
4.5%
New
New position
12Microsoft Corp
COM
$3.9M10.6K
3.8%
−23%
Reduced · −3K sh
13Broadcom Inc
COM
$3.6M9.5K
3.5%
New
New position
14Amazon Com Inc
COM
$3.3M13.9K
3.2%
−0.4%
Reduced · −55 sh
15Costco Wholesale Corporation
COM
$3.0M3.2K
2.9%
+0.7%
Added · +21 sh
16Apple Inc
COM
$2.3M8.1K
2.3%
+1.3%
Added · +107 sh
17Waste Mgmt Inc Del
COM
$1.5M6.6K
1.4%
−68%
Reduced · −14K sh
18Mastercard Incorporated
CL A
$723K1.4K
0.7%
−56%
Reduced · −2K sh
19Autoliv Inc
COM
$711K6.1K
0.7%
−3.6%
Reduced · −231 sh
20Ishares TR
GLOBAL TECH ETF
$637K4.4K
0.6%
Held
21Vanguard Admiral FDS Inc
500 GRTH IDX F
$612K7.4K
0.6%
12×
Added · +7K sh
22NBT Bancorp Inc
COM
$600K12.2K
0.6%
Held
23Eli Lilly & Co
COM
$569K474
0.6%
Held
24McDonalds Corp
COM
$509K1.9K
0.5%
+0.1%
Added · +2 sh
25Vanguard Specialized Funds
DIV APP ETF
$425K1.8K
0.4%
−7.0%
Reduced · −136 sh
26Ishares TR
U.S. TECH ETF
$410K1.6K
0.4%
+0.5%
Added · +8 sh
27Tesla Inc
COM
$354K841
0.3%
Held
28Eaton Corp PLC
SHS
$298K698
0.3%
Held
29Vaneck ETF Trust
SEMICONDUCTR ETF
$278K425
0.3%
New
New position
30Vaneck Merk Gold ETF
GOLD SHS
$271K7.0K
0.3%
+29%
Added · +2K sh
31Wells Fargo & Co
COM
$268K3.2K
0.3%
+0.6%
Added · +19 sh
32Abbvie Inc
COM
$266K1.1K
0.3%
Held
33Ishares TR
0-5YR HI YL CP
$250K5.9K
0.2%
New
New position
34Autozone Inc
COM
$237K74
0.2%
Held
35Citigroup Inc
COM NEW
$205K1.5K
0.2%
New
New position
36Oracle Corp
COM
$201K1.4K
0.2%
Held
37BGC Group Inc
CL A
$167K15.7K
0.2%
−7.3%
Reduced · −1K sh
Showing all 37 positions
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Filing history

As-of date vs the date the SEC received each filing

$103.1M · Q2 2026Q4 2025 · $99.6MQ2 2026 · $103.1M

Reported 13F total per quarter. Raw filing totals can include option notional.

QuarterAs ofFiledLagPositionsValueForm
Q2 2026Jun 30, 2026Jul 13, 202613d37$103.1M13F-HR
Q1 2026Mar 31, 2026Apr 10, 202610d35$94.3M13F-HR
Q4 2025Dec 31, 2025Feb 9, 202640d42$99.6M13F-HR

Data source

Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.