Mark Massey Holdings Activity

AltaRock Partners Portfolio 13F

AltaRock Partners has disclosed a total of 8 changes to the portfolio in the latest (2026 Q1) SEC report(s): increased the number of shares of 2 and decreased the number of shares of 6 position(s).

What stocks is Mark Massey buying now?

In the recent quarter Mark Massey has purchased 2 securities: (AMZN) AMAZONCOM INC (added shares +3.46%) and (MCO) MOODY'S CORP (added shares +5.84%).

What does Mark Massey invest in?

Mark Massey's top 5 holdings (by % of portfolio) are (AMZN) AMAZONCOM INC (38.2%), (TDG) TRANSDIGM GROUP INC (25.54%), (MSFT) MICROSOFT CORP (16.75%), (MCO) MOODY'S CORP (9.11%) and (MA) MASTERCARD INC - A (6.33%).

In the latest report(s) the following changes have been made to the top investments: (AMZN) AMAZONCOM INC (added shares +3.46%), (TDG) TRANSDIGM GROUP INC (reduced shares -6.21%), (MSFT) MICROSOFT CORP (reduced shares -10.32%), (MCO) MOODY'S CORP (added shares +5.84%) and (MA) MASTERCARD INC - A (reduced shares -3.51%).

2026 Q1 (8 results)
MCO
+5.84%
+47,533
+0.50%
$436.25
2.96% $449.15
9.11%
AMZN
+3.46%
+253,412
+1.28%
$208.27
21.86% $253.79
38.20%
V
-3.48%
-18,000
-0.13%
$302.24
5.94% $320.18
3.65%
MA
-3.51%
-19,000
-0.23%
$499.66
3.58% $481.76
6.33%
TDG
-6.21%
-60,232
-1.69%
$1,158.96
5.96% $1,228.09
25.54%
MSFT
-10.32%
-214,820
-1.93%
$370.17
15.64% $428.05
16.75%
GOOGL
-74.38%
-126,000
-0.88%
$287.56
29.43% $372.19
0.30%
HLT
-97.17%
-527,272
-3.89%
$304.08
-
0.11%
2025 Q4 (8 results)
TDG
-0.72%
-6,992
-0.18%
$1,329.85
7.65% $1,228.09
25.28%
V
-3.16%
-16,845
-0.12%
$350.71
8.71% $320.18
3.55%
AMZN
-3.22%
-243,719
-1.10%
$230.82
9.95% $253.79
33.10%
MA
-7.23%
-42,250
-0.47%
$570.88
15.61% $481.76
6.07%
MCO
-14.15%
-134,232
-1.34%
$510.85
12.08% $449.15
8.16%
MSFT
-18.95%
-486,910
-4.62%
$483.62
11.49% $428.05
19.75%
GOOGL
-50.81%
-175,000
-1.07%
$313.00
18.91% $372.19
1.04%
FICO
-100.00%
-667
-0.02%
$1,496.53
22.04% $1,166.70
0.00%
2025 Q3 (9 results)
AMZN
+20.43%
+1,282,347
+5.15%
$219.57
15.59% $253.79
30.34%
V
-0.35%
-1,890
-0.01%
$341.38
6.21% $320.18
3.33%
HLT
-0.36%
-1,983
-0.01%
$259.44
-
2.57%
TDG
-0.36%
-3,558
-0.09%
$1,318.02
6.82% $1,228.09
23.53%
MSFT
-0.36%
-9,382
-0.09%
$517.95
17.36% $428.05
24.33%
MCO
-0.37%
-3,519
-0.03%
$476.48
5.74% $449.15
8.27%
MA
-0.37%
-2,168
-0.02%
$568.81
15.30% $481.76
6.07%
FICO
-0.45%
-3
-0.00%
$1,496.53
22.04% $1,166.70
0.00%
GOOGL
-67.06%
-701,038
-3.12%
$243.10
53.10% $372.19
1.53%
2025 Q2 (5 results)
HLT
+98.79%
+270,639
+1.32%
$266.34
-
2.65%
AMZN
+20.63%
+1,073,491
+4.30%
$219.39
15.68% $253.79
25.14%
MCO
+0.14%
+1,349
+0.01%
$501.59
10.45% $449.15
8.72%
V
-37.04%
-315,000
-2.04%
$355.05
9.82% $320.18
3.47%
GOOGL
-69.74%
-2,408,938
-7.75%
$176.23
111.20% $372.19
3.36%
2025 Q1 (7 results)
HLT
+199.97%
+182,629
+0.84%
$227.55
-
1.25%
MSFT
+36.32%
+687,008
+5.19%
$375.39
14.03% $428.05
19.46%
GOOGL
-0.76%
-26,434
-0.08%
$154.64
140.68% $372.19
10.74%
AMZN
-1.44%
-75,905
-0.29%
$190.26
33.39% $253.79
19.90%
TDG
-2.06%
-20,654
-0.57%
$1,383.29
11.22% $1,228.09
27.26%
V
-2.80%
-24,500
-0.17%
$350.46
8.64% $320.18
5.99%
CHTR
-100.00%
-6,025
-0.04%
$342.77
62.35% $129.05
0.00%
2024 Q4 (9 results)
HLT
buy
+91,328
+0.46%
$247.16
-
0.46%
GOOGL
+4.41%
+146,896
+0.56%
$189.30
96.61% $372.19
13.33%
MSFT
-2.23%
-43,175
-0.37%
$421.50
1.55% $428.05
16.13%
AMZN
-2.30%
-124,000
-0.55%
$219.39
15.68% $253.79
23.42%
TDG
-4.55%
-47,660
-1.22%
$1,267.28
3.09% $1,228.09
25.65%
MA
-5.45%
-33,779
-0.36%
$526.57
8.51% $481.76
6.24%
MCO
-10.85%
-115,714
-1.11%
$473.37
5.12% $449.15
9.11%
V
-21.77%
-243,471
-1.56%
$316.04
1.31% $320.18
5.59%
FICO
-98.07%
-33,982
-1.37%
$1,990.93
41.40% $1,166.70
0.03%
46 of 262

Shares, change to shares, sold shares - 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.

Value or Price - If the security is completely sold out, we show the reported value (or price) prior to the actual period.