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Value GiantsValue investors’ 13F holdings, as a whole
Q2 2026 13FData as of Aug 18, 2026
Quality value

Mark Massey

Q2 2026 13F: 8 holdings worth about $4.2B; that quarter 0 new, 3 added, 5 trimmed, 0 sold out.

Firm: Altarock Partners LP
Filer: ALTAROCK PARTNERS LP CIK 1631014
Last filed: Aug 17, 2026 | Quality value | Counted in this quarter’s totals

13F lists only long positions in US-listed stocks (and some ETFs and convertibles); short positions, cash, bonds, shares listed outside the US and private companies are not shown, so this is not the giant’s whole portfolio.

Why This Giant Is Included

  • Rule numbers (Q2 2026): 8 holdings, top 10 = 100%, stocks $4.2B, options 0%; all four rules met
  • Source for the value approach: AltaRock Partners LP - Form ADV Part 2A (March 23, 2026) (AltaRock Partners LP (SEC Investment Adviser Public Disclosure, CRD 161005), 2026-03-23, p. 7): “investing in the equity securities of a select group of companies we deem to be both undervalued and to possess sustainable competitive advantages” (checked 2026-10-11)

Full selection rules →

13F value
$4.2B
previous $4.1B (+2.7%)
Holdings
8
0 new / 0 sold out
Net deploymentest.
−7.2%
est. net buying ÷ last quarter’s portfolio
Top-10 concentration
100%
overlap with the composite 10%
Turnoverest.
9.7%
held 33 quarters on average
I

Trades in Q2 2026

Sorted by position shift: how many percentage points of the portfolio the trade moved.

How to Read This

Share changes are split-adjusted. Est. trade price = (start + end price) ÷ 2; 13F does not show the actual trade date or price.

MoveCompanyChange in sharesChange %Position shift (pts)Start → end priceEst. trade price
TrimmedAMZNAmazon.com Inc−1.84M−24%−10.33$208.27 → $238.34$223.31
TrimmedMCOMoody’s Corp−559.4K−65%−5.98$436.25 → $452.92$444.59
AddedMSFTMicrosoft Corp+466.9K+25%+4.11$370.17 → $373.02$371.60
AddedMAMastercard Inc+241.7K+46%+2.93$499.66 → $513.60$506.63
AddedVVisa Inc+337.8K+68%+2.73$302.24 → $343.09$322.66
TrimmedTDGTransDigm Group Inc−33.4K−4%−1.05$1,159 → $1,332$1,246
TrimmedGOOGLAlphabet Inc−1.4K−3%−0.01$287.56 → $357.37$322.47
TrimmedHLTHilton Worldwide Holdings Inc−139−1%−0.00$304.08 → $330.46$317.27
II

All Holdings (8 Companies)

Share classes of one company are combined; click a heading to re-sort.

How to Read This

Est. average cost: shares bought each quarter × (start + end price) ÷ 2, weighted; trims do not change the cost. Positions held before Q1 1999 (or the giant’s earliest electronic filing) start from that quarter’s price and are marked ‘start point’. vs cost = quarter-end price ÷ est. average cost − 1, excluding dividends.

CompanySectorWeight (prev.)SharesValueThis quarterFirst boughtQuarters heldEst. avg costQuarter-end pricevs costHistory
AMZNAmazon.com IncConsumer discretionary32.2%38.2%5.73M$1.4BTrimmed −24%Q1 202218$167.69est.$238.34+42%History
TDGTransDigm Group IncIndustrials27.5%25.5%875.8K$1.2BTrimmed −4%Q4 201447$442.57est.start point$1,332+201%History
MSFTMicrosoft CorpInformation technology20.5%16.8%2.33M$870.8MAdded +25%Q2 202121$334.02est.$373.02+12%History
MAMastercard IncFinancials9.3%6.3%764.5K$392.7MAdded +46%Q4 201447$404.22est.start point$513.60+27%History
VVisa IncFinancials6.8%3.7%836.5K$287.0MAdded +68%Q4 201447$260.78est.start point$343.09+32%History
MCOMoody’s CorpFinancials3.2%9.1%302.6K$137.1MTrimmed −65%Q4 201447$338.13est.start point$452.92+34%History
GOOGLAlphabet IncInformation technology0.4%0.3%42.0K$15.0MTrimmed −3%Q4 201927$80.92est.$357.37+342%History
HLTHilton Worldwide Holdings IncConsumer discretionary0.1%0.1%15.2K$5.0MTrimmed −1%Q4 20247$242.37est.$330.46+36%History
III

Portfolio Map: Size Is Weight, Colour Is Gain or Loss against Cost

How to Read This

Each block is a company (up to 60); area = portfolio weight. The darker the colour, the further the quarter-end price is above (or below) the estimated cost: light 5–25%, medium 25–100%, darkest over 100%; grey is within 5%.

above costbelow costwithin 5%
Portfolio MapAMZNAmazon.com IncTDGTransDigm Group IncMSFTMicrosoft CorpMAMastercard IncVVisa IncMCOMoody’s Corp
IV

Over Time

From Q4 2014, 47 quarters (this giant’s electronic 13F filings).

13F Value

13F Value$0$2.0B$4.0BQ4 2014Q1 2016Q2 2017Q3 2018Q4 2019Q1 2021Q2 2022Q3 2023Q4 2024Q2 2026

Holdings

Holdings025810Q4 2014Q1 2016Q2 2017Q3 2018Q4 2019Q1 2021Q2 2022Q3 2023Q4 2024Q2 2026

Top-10 Concentration

Top-10 Concentration0%25%50%75%100%Q4 2014Q1 2016Q2 2017Q3 2018Q4 2019Q1 2021Q2 2022Q3 2023Q4 2024Q2 2026

Turnover (Est.)

Turnover0%10%20%30%Q4 2014Q1 2016Q2 2017Q3 2018Q4 2019Q1 2021Q2 2022Q3 2023Q4 2024Q2 2026

Sector Mix

Information technologyFinancialsCommunication & mediaConsumer discretionaryIndustrialsHealth careEnergyOther (incl. unclassified)
Sector Mix0%25%50%75%100%Q4 2014Q1 2016Q2 2017Q3 2018Q4 2019Q1 2021Q2 2022Q3 2023Q4 2024Q2 2026
V

Quarter by Quarter, with the Original Filings

* = not counted in that quarter’s totals. Links open the original SEC filing; 13F-HR/A is an amendment.

Show 47 Quarters
QuarterHoldingsNewSold out13F valueTurnoverNet deploymentSEC
Q2 2026800$4.2B9.7%−7.2%13F-HR
Q1 2026800$4.1B1.7%−5.8%13F-HR
Q4 2025801$5.1B0.0%−8.3%13F-HR
Q3 2025900$5.5B2.7%+2.5%13F-HR
Q2 2025900$5.5B5.5%−4.5%13F-HR
Q1 2025901$5.0B1.2%+5.2%13F-HR
Q4 20241010$4.9B1.0%−5.3%13F-HR
Q3 2024900$5.1B6.8%+1.4%13F-HR
Q2 2024910$4.9B5.1%−1.5%13F-HR
Q1 2024800$4.7B0.0%−7.8%13F-HR 13F-HR/A
Q4 2023800$4.5B4.6%−2.3%13F-HR
Q3 2023800$4.0B2.2%−2.4%13F-HR
Q2 2023800$4.2B2.0%−3.1%13F-HR
Q1 2023800$3.7B1.3%−1.8%13F-HR
Q4 2022800$3.2B6.1%+1.4%13F-HR
Q3 2022800$3.1B2.9%+2.8%13F-HR
Q2 2022801$3.2B1.4%+2.3%13F-HR
Q1 2022910$3.9B14.1%+9.2%13F-HR
Q4 2021800$3.8B12.7%+0.3%13F-HR
Q3 2021800$3.7B6.5%+1.5%13F-HR
Q2 2021810$3.6B0.0%+20.1%13F-HR
Q1 2021700$2.6B1.8%+7.4%13F-HR
Q4 2020710$2.4B20.3%−2.2%13F-HR
Q3 2020600$2.1B0.7%−2.3%13F-HR
Q2 2020600$2.0B11.3%−1.2%13F-HR
Q1 2020601$1.6B3.2%+19.5%13F-HR
Q4 2019710$1.6B0.0%+25.5%13F-HR
Q3 2019600$1.2B4.4%−5.4%13F-HR
Q2 2019600$1.2B1.6%+1.7%13F-HR
Q1 2019600$1.1B0.0%0.0%13F-HR
Q4 2018601$840.3M9.5%−12.1%13F-HR
Q3 2018700$1.1B0.6%+5.4%13F-HR
Q2 2018711$967.2M6.5%+6.7%13F-HR
Q1 2018711$873.9M21.8%+10.9%13F-HR
Q4 2017700$761.3M4.8%+9.4%13F-HR
Q3 2017700$683.9M2.8%−6.0%13F-HR
Q2 2017701$710.1M2.5%−3.6%13F-HR
Q1 2017800$674.2M3.2%−9.5%13F-HR
Q4 2016811$682.4M8.9%+14.5%13F-HR
Q3 2016812$627.9M10.2%+0.7%13F-HR
Q2 2016 *921$550.5M34.5%+3.3%13F-HR
Q1 2016 *800$542.5M0.0%+12.2%13F-HR
Q4 2015 *800$491.9M0.5%+12.3%13F-HR
Q3 2015 *810$419.5M0.6%+41.7%13F-HR
Q2 2015 *710$313.5M1.7%+55.0%13F-HR
Q1 2015 *611$200.1M4.6%+57.9%13F-HR
Q4 2014 *600$120.9M——13F-HR
VI

Large Positions Sold Out

Positions that once made up 2% or more of the portfolio and were later sold out (latest 40): holding period and what became of the company, without profit or loss.

How to Read This

Sold out means the holding no longer appears on the 13F: it may have been sold, or the company was acquired or delisted. Company status is checked only for companies the giants together once held $100M or more of, from the company’s own SEC filings (for example 8-K item 1.03 = bankruptcy filing); a dash means not checked.

CompanyHeldPeak weightCompany since
CHTRCharter Communications, Inc /moQ2 2016 – Q1 202539%—
METAMeta Platforms, IncQ4 2020 – Q2 202224%—
ORLYO’Reilly Automotive IncQ2 2018 – Q1 202013%—
BKNGBooking Holdings IncQ1 2018 – Q4 201824%—
WABWabtec CorpQ3 2016 – Q2 201811%—
—Booking Holdings IncQ4 2016 – Q1 201822%Still filing with the SEC
LBTYALiberty Global LtdQ4 2014 – Q2 201720%—
—Liberty Global PLC LilacQ3 2015 – Q4 20162%Still filing with the SEC
BRK.BBerkshire Hathaway IncQ2 2016 – Q3 20168%—