13-F holdings, Q3 2026
Blue Grotto Capital, LLC
A 13-F is the report large US investment managers file with the SEC each quarter, listing the stocks they held at quarter end.
- Reported value
- $1.5B
- Positions
- 28
- Filed
- Data as of
These holdings are as of , 43 days ago.
13-Fs for Q4 2026 are due by .
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Top holdings
- MSFT$113M220,248 shares7.8% of the book
- TLN$90.7M290,000 shares6.2% of the book
- TSM$89.8M196,850 shares6.2% of the book
- GEHC$78.4M1,200,000 shares5.4% of the book
- AMZN$74.7M300,000 shares5.1% of the book
- KEYS$72.8M200,000 shares5% of the book
- CACI$71.6M117,538 shares4.9% of the book
- SE$68.2M700,000 shares4.7% of the book
- AIZ$63.3M240,329 shares4.4% of the book
- RBA$61M750,000 shares4.2% of the book
What changed this quarter
7 new positions and 8 sold out, against Q2 2026. Added and trimmed positions use the change in split-adjusted shares at the Q3 2026 implied price; full exits use their Q2 2026 reported value, not sale proceeds.
Largest buys
- KEYS
KEYSIGHT TECHNOLOGIES INC
+$72.8M
New
Your stake and evidence for KEYS
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
A position newly appears in the Q3 2026 book.
Displayed change: +$72.8M. The current book reports 200,000 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
A new position uses its current quarter's reported dollar value; this is not the amount spent buying it.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: 72808000 USD. Current reported shares: 200000. Prior shares on current basis: not recorded.
- AIZ
ASSURANT INC
+$63.3M
New
Your stake and evidence for AIZ
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
A position newly appears in the Q3 2026 book.
Displayed change: +$63.3M. The current book reports 240,329 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
A new position uses its current quarter's reported dollar value; this is not the amount spent buying it.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: 63326693 USD. Current reported shares: 240329. Prior shares on current basis: not recorded.
- GEHC
GE HEALTHCARE TECHNOLOGIES I
+$62.4M
+387.8% shares
Your stake and evidence for GEHC
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
Reported shares increased between Q2 2026 and Q3 2026.
Displayed change: +$62.4M. The current book reports 1,200,000 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
For an added or trimmed position, subtract split-adjusted prior shares from current shares, then multiply by the current book's reported value per share; this is not the execution price.
1,200,000 current shares − 246,000 prior shares on the same basis = +954,000 shares.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: 62362979.205000006 USD. Current reported shares: 1200000. Prior shares on current basis: 246000.
- MSFT
MICROSOFT CORP
+$61.5M
+119.7% shares
Your stake and evidence for MSFT
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
Reported shares increased between Q2 2026 and Q3 2026.
Displayed change: +$61.5M. The current book reports 220,248 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
For an added or trimmed position, subtract split-adjusted prior shares from current shares, then multiply by the current book's reported value per share; this is not the execution price.
220,248 current shares − 100,248 prior shares on the same basis = +120,000 shares.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: 61548000.435872294 USD. Current reported shares: 220248. Prior shares on current basis: 100248.
- AMZN
AMAZON COM INC
+$49.8M
+200% shares
Your stake and evidence for AMZN
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
Reported shares increased between Q2 2026 and Q3 2026.
Displayed change: +$49.8M. The current book reports 300,000 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
For an added or trimmed position, subtract split-adjusted prior shares from current shares, then multiply by the current book's reported value per share; this is not the execution price.
300,000 current shares − 100,000 prior shares on the same basis = +200,000 shares.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: 49830000 USD. Current reported shares: 300000. Prior shares on current basis: 100000.
Largest sells
- SN
SHARKNINJA INC
−$74M
-61.9% shares
Your stake and evidence for SN
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
Reported shares decreased between Q2 2026 and Q3 2026.
Displayed change: −$74M. The current book reports 252,270 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
For an added or trimmed position, subtract split-adjusted prior shares from current shares, then multiply by the current book's reported value per share; this is not the execution price.
252,270 current shares − 662,928 prior shares on the same basis = -410,658 shares.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: -73967719.93671066 USD. Current reported shares: 252270. Prior shares on current basis: 662928.
- CDW
CDW CORP
−$44.4M
Sold out, was 3.7% of the book
Your stake and evidence for CDW
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
The position reported in Q2 2026 is absent from the comparable Q3 2026 book.
Displayed change: −$44.4M. This was 3.7% of the prior book.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
A full exit is shown as the negative of its prior reported value, not sale proceeds or a value at today's price.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: -44391891 USD. Current reported shares: not recorded. Prior shares on current basis: 315642.
- CELH
CELSIUS HLDGS INC
−$43.6M
Sold out, was 3.6% of the book
Your stake and evidence for CELH
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
The position reported in Q2 2026 is absent from the comparable Q3 2026 book.
Displayed change: −$43.6M. This was 3.6% of the prior book.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
A full exit is shown as the negative of its prior reported value, not sale proceeds or a value at today's price.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: -43612502 USD. Current reported shares: not recorded. Prior shares on current basis: 1489498.
- PGR
PROGRESSIVE CORP
−$38.9M
Sold out, was 3.2% of the book
Your stake and evidence for PGR
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
The position reported in Q2 2026 is absent from the comparable Q3 2026 book.
Displayed change: −$38.9M. This was 3.2% of the prior book.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
A full exit is shown as the negative of its prior reported value, not sale proceeds or a value at today's price.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: -38894804 USD. Current reported shares: not recorded. Prior shares on current basis: 178049.
- CACI
CACI INTL INC
−$32.4M
-31.2% shares
Your stake and evidence for CACI
What it means for you
This public view does not read your holdings or watchlist; open the member view to check your stake.
Use this to decide what to research, rather than as an instruction to copy a trade.
What happened
Reported shares decreased between Q2 2026 and Q3 2026.
Displayed change: −$32.4M. The current book reports 117,538 shares.
Why it can matter
A change between quarter-end disclosures can prompt a question about the manager's exposure. It does not reveal the trade date, the execution price or why the position changed; a full exit is not proof of a bearish decision.
How we got this
For an added or trimmed position, subtract split-adjusted prior shares from current shares, then multiply by the current book's reported value per share; this is not the execution price.
117,538 current shares − 170,734 prior shares on the same basis = -53,196 shares.
Comparable books exclude identified CUSIP, share-basis and new-security events from trades. Exit-size bands describe prior book weight, not the manager's intent.
Where the data comes from
SEC 13F quarter-end holdings for Q2 2026 and Q3 2026; these delayed disclosures omit shorts and many other assets.
Current source filed .
Technical details
Reported dollar change: -32402215.931120146 USD. Current reported shares: 117538. Prior shares on current basis: 170734.
What was sold out, by size
- 8 real positions, 0.25% of the book or more
All of this comes from the filer's public SEC filings. A 13-F shows long positions in US-listed securities at quarter end and can leave out short positions, cash and non-US holdings, so it is not the whole portfolio. This is filing data, not investment advice.