Mark Massey
AltaRock Partners
AltaRock Partners Portfolio 13F
Mark Massey Holdings Activity
- Portfolio value:
- $5.10B≈ (-$369M≈)
- Previous value:
- $5.47B≈
- # of changes:
- 8
- New positions:
- 0
- Reported for:
- 31 Dec 2025 (Q4)
- Latest filing date:
- 13 Feb 2026
AltaRock Partners has disclosed a total of 8 changes to the portfolio in the (2025 Q4) SEC report(s): decreased the number of shares of 7 and completely sold out 1 position(s).
What stocks did Mark Massey buy in 2025 Q4?
During 2025 Q4 Mark Massey has not purchased any securities.
In the 2025 Q4 report(s) the following changes have been made to the top investments: (AMZN) Amazon.com Inc (reduced shares -3.22%), (TDG) Transdigm Group Incorporated (reduced shares -0.72%), (MSFT) Microsoft Corp (reduced shares -18.95%), (MCO) Moodys Corp (reduced shares -14.15%) and (MA) Mastercard Inc (reduced shares -7.23%).
8 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* |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
Transdigm Group Incorporated
|
-0.72%
|
-6,992
|
969,400
|
-0.17%
|
$1,329.85
|
-5.21%($1,260.50)
|
25.28%
|
2014 Q4
|
≈ 11.25 years
|
|
|
|
Visa Inc, CL-A
|
-3.16%
|
-16,845
|
516,677
|
-0.11%
|
$350.71
|
+4.12%($365.18)
|
3.55%
|
2014 Q4
|
≈ 11.25 years
|
|
|
|
Amazon.com Inc
|
-3.22%
|
-243,719
|
7,314,534
|
-1.03%
|
$230.82
|
+17.43%($271.05)
|
33.10%
|
2022 Q1
|
≈ 4.00 years
|
|
|
|
Mastercard Inc
|
-7.23%
|
-42,250
|
541,836
|
-0.44%
|
$570.88
|
+0.44%($573.40)
|
6.07%
|
2014 Q4
|
≈ 11.25 years
|
|
|
|
Moodys Corp
|
-14.15%
|
-134,232
|
814,503
|
-1.25%
|
$510.85
|
-6.19%($479.23)
|
8.16%
|
2014 Q4
|
≈ 11.25 years
|
|
|
|
Microsoft Corp
|
-18.95%
|
-486,910
|
2,082,357
|
-4.31%
|
$483.62
|
-4.64%($461.18)
|
19.75%
|
2021 Q2
|
≈ 4.75 years
|
|
|
|
Alphabet Inc, CL-A
|
-50.81%
|
-175,000
|
169,391
|
-1%
|
$313.00
|
+13.02%($353.76)
|
1.04%
|
2019 Q4
|
≈ 6.25 years
|
|
|
|
Fair Isaac Corp
|
-100%
|
-667
|
0
|
-0.02%
|
$1,496.53
|
-25.19%($1,119.57)
|
0.00%
|
2024 Q2
|
≈ 1.50 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.