Altarock Partners

Rating #27

Mark Massey

Altarock Partners

Portfolio value

$5.47B

Stocks

9

Performance

1 Year

+10.63%

Stock Holdings

$

%

1Y

3Y

5Y

10Y

Mark Massey’s Portfolio: Q3 2025

Top9 stocks: 99.99% of the portfolio

Mark Massey’s Trades: Q3 2025

Adds

New Buys

Sold Outs

Cuts

AMZN logo
AMZN

Share Count Chg. (%)

+20.43%

Price Paid
$226.35
Buy Value
$290.26M
Portfolio % Change

5.21ppt

Mark Massey’s Holdings: Q3 2025

Company Name
Primary Industry
Avg. price paid
sort
Share Count Chg. (%)
sort
No of shares held
sort
Market value
sort
Portfolio % Change
sort
% of Ownership
sort
Holding period
sort
Last Transaction
Retail-Catalog & Mail-Order
$162.88

+20.43%

7.56M
$1.66B

30.34%

5.21ppt

0.07%
15 Quarters
Q3 2025
Prepackaged Software
$320.78

-0.36%

2.57M
$1.33B

24.33%

0.91ppt

0.03%
18 Quarters
Q3 2025
Other Aircraft Equipment
$424.95

-0.36%

976.39K
$1.29B

23.53%

-3.68ppt

1.68%
44 Quarters
Q3 2025
Consumer Credit Reporting
$346.62

-0.37%

948.74K
$452.05M

8.27%

-0.45ppt

0.53%
44 Quarters
Q3 2025
Other Business Services
$371.70

-0.37%

584.09K
$332.23M

6.07%

0.06ppt

0.06%
44 Quarters
Q3 2025
Other Business Services
$216.46

-0.35%

533.52K
$182.13M

3.33%

-0.14ppt

0.03%
44 Quarters
Q3 2025
Hotels & Motels
$250.12

-0.36%

542.61K
$140.78M

2.57%

-0.07ppt

0.23%
4 Quarters
Q3 2025
Computer Programming & Data
$82.60

-67.06%

344.39K
$83.72M

1.53%

-1.83ppt

0.00%
24 Quarters
Q3 2025
Other Business Services
$1496.51

-0.45%

667.00
$998.19K

0.02%

-0.00ppt

0.00%
6 Quarters
Q3 2025
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