Mark Massey
AltaRock Partners
AltaRock Partners Portfolio 13F
Mark Massey Holdings Activity
- Portfolio value:
- $5.47B≈ (-$8M≈)
- Previous value:
- $5.48B≈
- # of changes:
- 9
- New positions:
- 0
- Reported for:
- 30 Sep 2025 (Q3)
- Latest filing date:
- 14 Nov 2025
AltaRock Partners has disclosed a total of 9 changes to the portfolio in the (2025 Q3) SEC report(s): increased the number of shares of 1 and decreased the number of shares of 8 position(s).
What stocks did Mark Massey buy in 2025 Q3?
During 2025 Q3 Mark Massey has bought (AMZN) Amazon.com Inc (added shares +20.43%).
In the 2025 Q3 report(s) the following changes have been made to the top investments: (AMZN) Amazon.com Inc (added shares +20.43%), (MSFT) Microsoft Corp (reduced shares -0.36%), (TDG) Transdigm Group Incorporated (reduced shares -0.36%), (MCO) Moodys Corp (reduced shares -0.37%) and (MA) Mastercard Inc (reduced shares -0.37%).
9 results
| History | Ticker | Name |
% or activity |
Shares change |
Shares held after* |
% change to portfolio |
Reported price* |
% difference current price* |
% of portfolio |
Held since* | Held for* |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
Amazon.com Inc
|
+20.43%
|
+1,282,347
|
7,558,253
|
+5.15%
|
$219.57
|
+23.45%($271.05)
|
30.34%
|
2022 Q1
|
≈ 3.75 years
|
|
|
|
Visa Inc, CL-A
|
-0.35%
|
-1,890
|
533,522
|
-0.01%
|
$341.38
|
+6.97%($365.18)
|
3.33%
|
2014 Q4
|
≈ 11.00 years
|
|
|
|
Transdigm Group Incorporated
|
-0.36%
|
-3,558
|
976,392
|
-0.09%
|
$1,318.02
|
-4.36%($1,260.50)
|
23.53%
|
2014 Q4
|
≈ 11.00 years
|
|
|
|
Microsoft Corp
|
-0.36%
|
-9,382
|
2,569,267
|
-0.09%
|
$517.95
|
-10.96%($461.18)
|
24.33%
|
2021 Q2
|
≈ 4.50 years
|
|
|
|
Hilton Worldwide Holdings Inc
|
-0.36%
|
-1,983
|
542,613
|
-0.01%
|
$259.44
|
+23.55%($320.54)
|
2.57%
|
2024 Q4
|
≈ 1.00 year
|
|
|
|
Moodys Corp
|
-0.37%
|
-3,519
|
948,735
|
-0.03%
|
$476.48
|
+0.58%($479.23)
|
8.27%
|
2014 Q4
|
≈ 11.00 years
|
|
|
|
Mastercard Inc
|
-0.37%
|
-2,168
|
584,086
|
-0.02%
|
$568.81
|
+0.81%($573.40)
|
6.07%
|
2014 Q4
|
≈ 11.00 years
|
|
|
|
Fair Isaac Corp
|
-0.45%
|
-3
|
667
|
-0%
|
$1,496.53
|
-25.19%($1,119.57)
|
0.02%
|
2024 Q2
|
≈ 1.50 years
|
|
|
|
Alphabet Inc, CL-A
|
-67.06%
|
-701,038
|
344,391
|
-3.11%
|
$243.10
|
+45.52%($353.76)
|
1.53%
|
2019 Q4
|
≈ 6.00 years
|
|
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
* Current price: this can be a delayed price and may not reflect the real-time market value, however it is too close.
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* Held since / Held for: calculated since the latest "new buy" position. If the security was previously exited and re-entered, only the most recent holding period is counted.