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%).

History
Ticker
Stock
%
Activity
Share
Change
% change to
Portfolio
Reported
Price*
% difference
Current Price
% of
Portfolio
2020 Q4 (7 results)
META
META PLATFORMS INC-CLASS A
buy
+1,711,882
+19.60%
$273.16
117.09% $593.00
19.60%
V
VISA INC-CLASS A SHARES
-0.02%
-2
-0.00%
$218.70
47.95% $323.57
0.08%
GOOGL
ALPHABET INC-CL A
-11.35%
-819,380
-3.01%
$87.63
320.54% $368.53
23.50%
TDG
TRANSDIGM GROUP INC
-16.28%
-199,436
-5.17%
$618.85
100.17% $1,238.74
26.60%
CHTR
CHARTER COMMUNICATIONS INC-A
-18.32%
-200,723
-5.57%
$661.55
80.03% $132.12
24.81%
MA
MASTERCARD INC - A
-54.45%
-210,691
-3.15%
$356.94
37.58% $491.08
2.64%
MCO
MOODY'S CORP
-65.61%
-436,187
-5.31%
$290.24
55.51% $451.35
2.78%
2020 Q3 (5 results)
TDG
TRANSDIGM GROUP INC
+2.74%
+32,629
+0.73%
$475.12
160.72% $1,238.74
27.45%
GOOGL
ALPHABET INC-CL A
+0.18%
+12,840
+0.04%
$73.28
402.91% $368.53
24.95%
CHTR
CHARTER COMMUNICATIONS INC-A
-4.84%
-55,695
-1.64%
$624.34
78.84% $132.12
32.26%
MA
MASTERCARD INC - A
-6.07%
-25,000
-0.40%
$338.17
45.22% $491.08
6.17%
MCO
MOODY'S CORP
-9.60%
-70,639
-0.97%
$289.85
55.72% $451.35
9.09%
2020 Q2 (6 results)
GOOGL
ALPHABET INC-CL A
+23.82%
+1,386,000
+5.04%
$70.90
419.77% $368.53
26.19%
TDG
TRANSDIGM GROUP INC
+18.04%
+182,265
+4.13%
$442.05
180.23% $1,238.74
27.02%
MA
MASTERCARD INC - A
+13.81%
+50,000
+0.76%
$295.70
66.07% $491.08
6.24%
CHTR
CHARTER COMMUNICATIONS INC-A
+5.07%
+55,552
+1.45%
$510.04
74.10% $132.12
30.10%
MCO
MOODY'S CORP
-50.50%
-750,230
-10.57%
$274.73
64.29% $451.35
10.36%
V
VISA INC-CLASS A SHARES
-95.92%
-200,000
-1.98%
$193.17
67.51% $323.57
0.08%
2020 Q1 (7 results)
TDG
TRANSDIGM GROUP INC
+72.68%
+425,143
+8.64%
$320.19
286.88% $1,238.74
20.54%
MCO
MOODY'S CORP
+41.46%
+435,463
+5.85%
$211.50
113.40% $451.35
19.95%
GOOGL
ALPHABET INC-CL A
+26.50%
+1,218,860
+4.50%
$58.10
534.33% $368.53
21.47%
CHTR
CHARTER COMMUNICATIONS INC-A
+1.29%
+14,000
+0.39%
$436.31
69.72% $132.12
30.35%
MA
MASTERCARD INC - A
-8.82%
-35,000
-0.54%
$241.56
103.30% $491.08
5.55%
V
VISA INC-CLASS A SHARES
-17.10%
-43,000
-0.44%
$161.12
100.83% $323.57
2.13%
ORLY
O'REILLY AUTOMOTIVE INC
-100.00%
-1,408,770
-2.61%
$29.22
209.16% $90.33
0.00%
2019 Q4 (1 result)
GOOGL
ALPHABET INC-CL A
buy
+4,600,000
+19.06%
$66.97
450.29% $368.53
19.06%
2019 Q3 (5 results)
CHTR
CHARTER COMMUNICATIONS INC-A
+13.35%
+127,388
+4.55%
$412.12
67.94% $132.12
38.63%
TDG
TRANSDIGM GROUP INC
-3.47%
-21,000
-0.95%
$520.67
137.91% $1,238.74
26.39%
MCO
MOODY'S CORP
-7.08%
-80,000
-1.42%
$204.83
120.35% $451.35
18.64%
V
VISA INC-CLASS A SHARES
-10.97%
-31,000
-0.46%
$172.01
88.11% $323.57
3.75%
ORLY
O'REILLY AUTOMOTIVE INC
-69.58%
-3,222,165
-7.42%
$26.57
240.01% $90.33
3.24%
2019 Q2 (2 results)
CHTR
CHARTER COMMUNICATIONS INC-A
+10.97%
+94,316
+3.22%
$395.18
66.57% $132.12
32.53%
TDG
TRANSDIGM GROUP INC
-5.69%
-36,561
-1.53%
$483.80
156.04% $1,238.74
25.29%
2018 Q4 (6 results)
TDG
TRANSDIGM GROUP INC
+20.22%
+108,054
+4.37%
$340.06
264.27% $1,238.74
26.00%
MCO
MOODY'S CORP
+16.89%
+163,354
+2.72%
$140.04
222.30% $451.35
18.84%
CHTR
CHARTER COMMUNICATIONS INC-A
+12.16%
+93,252
+3.16%
$284.97
53.64% $132.12
29.16%
MA
MASTERCARD INC - A
-0.34%
-1,350
-0.03%
$188.65
160.31% $491.08
8.91%
ORLY
O'REILLY AUTOMOTIVE INC
-1.56%
-73,500
-0.20%
$22.96
293.50% $90.33
12.65%
BKNG
BOOKING HOLDINGS INC
-100.00%
-120,083
-28.35%
$1,984.00
91.64% $165.84
0.00%
2018 Q3 (3 results)
BKNG
BOOKING HOLDINGS INC
+16.04%
+16,600
+3.03%
$1,984.00
91.64% $165.84
0.00%
CHTR
CHARTER COMMUNICATIONS INC-A
+11.68%
+80,200
+2.40%
$325.88
59.46% $132.12
22.95%
ORLY
O'REILLY AUTOMOTIVE INC
-5.84%
-291,750
-0.62%
$23.15
290.12% $90.33
10.01%
2018 Q2 (4 results)
ORLY
O'REILLY AUTOMOTIVE INC
buy
+4,996,185
+9.42%
$18.24
395.29% $90.33
9.42%
CHTR
CHARTER COMMUNICATIONS INC-A
+16.43%
+96,884
+2.94%
$293.21
54.94% $132.12
20.81%
BKNG
BOOKING HOLDINGS INC
+1.27%
+1,300
+0.27%
$2,027.09
91.82% $165.84
21.69%
WAB
WABTEC CORP
-100.00%
-666,426
-5.61%
$81.40
219.90% $260.40
0.00%
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.