Arkolith/Funds/Sentinel Dome Partners, LLC

Sentinel Dome Partners, LLC

CIK 2114194
Holdings as of Jun 30, 2026·disclosed Aug 14, 2026·~45-day 13F lag·13F-HR
Active Filer

Sentinel Dome Partners, LLC holds a focused book of 32 reported positions worth $137.1M as of Q2 2026 (disclosed Aug 14, 2026, a ~45-day 13F lag). This quarter they opened DoorDash, Inc. and trimmed Uniti Group Inc. Their largest long position is Uniti Group Inc at 12% of the reported non-option book. Cloning the disclosed picks since 2026 would be -2% (-4.7%/yr). That is a simulation of the disclosed long book, not audited returns.

Opened
12
bought for the first time
  • DoorDash, Inc.
  • Cloudflare, Inc.
  • NCL Corp Ltd
+9 more · largest first
Added to
9
already held, bought more
+6 more · largest first
Trimmed
7
sold some, still holds it
+4 more · largest first
Sold out
9
exited the position entirely
+6 more · largest first, by prior value

Growth of $10,000: cloning the disclosed book

If you'd copied them
-2.5%
-4.7%/yr · since Mar '26
Their reported book
-8.7%
held from quarter-end
S&P 500
+12.7%
same window
$9K$10K$10K$11K$11KMar '26Apr '26May '26Jun '26Jul '26Sep '26
Sentinel Dome Partners, LLC (copied at disclosure) S&P 500

Following at the filing date actually beat the quarter-end book by 6.2 points over this window.

Growth of $10,000 cloning Sentinel Dome Partners, LLC's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~45 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
45%
Top 10 holdings
65%
Top 20 holdings
88%

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

39% mapped to company sectors

No sector on file yet
61%
Communication Services
22%
Financials
8%
Consumer Discretionary
6%
Information Technology
4%

+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
  • DoorDash, Inc.
    New$14.4M
  • Cloudflare, Inc.
    New$8.2M
  • NCL Corp Ltd
    New$7.2M
  • +79%$7.1M
  • Live Nation EntertainmenLYV 2.875 01/15/30
    +86%$5.5M
  • Rubrik, Inc.
    New$4.6M
Trimmed / exited

Funds with the most overlap

Other tracked managers holding the same core names as Sentinel Dome Partners, LLC

Manager / fundShared namesTheir $ in those
Newlands Management Operations LLC3 / 32$8.3B
Hardin Capital Partners, LLC4 / 32$94.7M
Legend Capital Advisors LLC4 / 32$80.7M
MFF Capital Investments Ltd6 / 32$684.9M
Explore Capital Management, LLC3 / 32$35.2M
Cryder Capital Partners LLP3 / 32$444.3M
Gavilan Investment Partners LLC4 / 32$113.4M
ValueAct Holdings, L.P.3 / 32$1.6B

Ranked by the share of each fund's own book sitting in the names it shares with Sentinel Dome Partners, 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.

32 positions
#SecurityValueShares% PortLast moveHistory
1Uniti Group Inc
COM
$16.1M1.40M
11.7%
+79%
Added · +620K sh
2DoorDash, Inc.
Convertible Bond
$14.4M14.50M
10.5%
New
New position
3Live Nation Entertainment Inc
Convertible Bond
$12.0M9.97M
8.7%
+86%
Added · +4.6M sh
4Uniti Group Inc
Convertible Bond
$11.5M9.25M
8.4%
−67%
Reduced · −19.0M sh
5Cloudflare, Inc.
Convertible Bond
$8.2M6.50M
6.0%
New
New position
6Amazon.com Inc
COM
$7.8M32.7K
5.7%
+3.1%
Added · +1K sh
7NCL Corp Ltd
Convertible Bond
$7.2M6.38M
5.2%
New
New position
8Rubrik, Inc.
Convertible Bond
$4.6M4.50M
3.4%
New
New position
9Telephone and Data Systems Inc
COM
$4.3M115.0K
3.1%
Held
10Oracle Corp
Com
$3.7M82.5K
2.7%
New
New position
11Royal Caribbean Cruises Ltd.
COM
$3.5M10.9K
2.5%
New
New position
12Blackstone Inc
COM
$3.2M27.6K
2.4%
−9.8%
Reduced · −3K sh
13Mastercard Inc
COM
$3.2M6.3K
2.4%
+19%
Added · +1K sh
14EchoStar Corp
COM
$3.2M31.5K
2.3%
−36%
Reduced · −18K sh
15Home Depot Inc
COM
$3.2M9.1K
2.3%
+43%
Added · +3K sh
16Alphabet Inc.
COM
$3.2M63.0K
2.3%
New
New position
17Alphabet Inc.
COM
$3.2M63.0K
2.3%
New
New position
18Hilton Worldwide Holdings Inc
COM
$3.2M9.6K
2.3%
+32%
Added · +2K sh
19Netflix
COM
$2.6M37.0K
1.9%
−8.6%
Reduced · −4K sh
20Lumen Technologies Inc
COM
$2.6M332.8K
1.9%
+9.9%
Added · +30K sh
21Meta Platforms Inc
COM
$2.2M3.9K
1.6%
−4.9%
Reduced · −200 sh
22Guidewire Software Inc
Convertible Bond
$1.9M2.00M
1.4%
New
New position
23Visa Inc.
COM
$1.7M5.0K
1.3%
New
New position
24Snowflake
COM
$1.7M6.6K
1.2%
+43%
Added · +2K sh
25Applied Digital Corp
COM
$1.5M39.5K
1.1%
New
New position
26Lowe's Companies
COM
$1.4M6.5K
1.0%
Held
27Spotify Technology SA
COM
$1.4M3.0K
1.0%
−27%
Reduced · −1K sh
28Core Scientific
COM
$1.1M42.0K
0.8%
−14%
Reduced · −7K sh
29Robinhood Markets CL A
COM
$1.1M10.5K
0.8%
+40%
Added · +3K sh
30Shopify CL A Sub VTG
COM
$971K8.5K
0.7%
Held
31Strategy Inc
COM
$962K16.0K
0.7%
Held
32Builders FirstSource Inc
COM
$537K6.0K
0.4%
New
New position
Showing all 32 positions
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Filing history

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

$147.0M · Q4 2025Q4 2025 · $147.0MQ2 2026 · $137.1M

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

QuarterAs ofFiledLagPositionsValueForm
Q2 2026Jun 30, 2026Aug 14, 202645d32$137.1M13F-HR
Q1 2026Mar 31, 2026May 15, 202645d29$105.1M13F-HR
Q4 2025Dec 31, 2025Mar 5, 202664d30$147.0M13F-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.