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%).

2018 Q1 (5 results)
BKNG
buy
+102,183
+24.33%
$2,080.39
91.75% $171.63
24.33%
CHTR
+34.56%
+151,411
+5.39%
$311.22
57.59% $132.00
21.00%
WAB
-2.91%
-20,000
-0.19%
$81.40
233.98% $271.86
0.00%
TDG
-7.78%
-45,100
-1.58%
$306.94
328.99% $1,316.75
18.77%
PCLN
-100.00%
-94,263
-18.75%
$1,737.74
98.13% $32.57
0.00%
2017 Q4 (4 results)
CHTR
+88.37%
+205,530
+9.07%
$335.96
60.71% $132.00
19.33%
PCLN
+18.70%
+14,850
+3.39%
$1,737.74
98.13% $32.57
0.00%
TDG
-10.36%
-67,000
-2.42%
$274.62
379.48% $1,316.75
20.91%
MCO
-10.67%
-115,529
-2.24%
$147.61
209.07% $456.22
18.75%
2017 Q3 (2 results)
TDG
+13.00%
+74,367
+2.78%
$255.65
415.06% $1,316.75
24.17%
CHTR
-43.35%
-177,964
-9.46%
$363.42
63.68% $132.00
12.36%
2017 Q2 (3 results)
TDG
+6.73%
+36,094
+1.37%
$268.87
389.73% $1,316.75
21.67%
CHTR
+6.48%
+25,000
+1.19%
$336.85
60.81% $132.00
19.48%
LBTYK
-100.00%
-1,254,232
-6.19%
$35.04
68.86% $10.91
0.00%
2017 Q1 (7 results)
PCLN
+19.94%
+13,200
+3.48%
$1,779.97
98.17% $32.57
20.96%
MCO
+0.38%
+4,100
+0.07%
$112.04
307.19% $456.22
17.99%
WAB
-0.49%
-3,400
-0.04%
$78.00
248.54% $271.86
7.94%
MA
-1.34%
-5,400
-0.09%
$112.47
338.33% $492.99
6.64%
TDG
-9.37%
-55,434
-1.81%
$220.16
498.09% $1,316.75
17.50%
CHTR
-19.95%
-96,100
-4.67%
$327.32
59.67% $132.00
18.72%
LBTYK
-51.49%
-1,331,127
-6.92%
$35.04
68.86% $10.91
0.00%
2016 Q4 (7 results)
PCLN
buy
+66,213
+14.22%
$1,466.06
97.78% $32.57
14.22%
TDG
+34.69%
+152,356
+5.56%
$248.96
428.90% $1,316.75
21.58%
MCO
+11.74%
+113,336
+1.57%
$94.27
383.95% $456.22
14.90%
CHTR
-12.10%
-66,300
-2.80%
$287.92
54.15% $132.00
20.32%
WAB
-17.86%
-150,000
-1.82%
$83.02
227.47% $271.86
8.39%
LBTYK
-18.13%
-572,475
-2.49%
$29.70
63.27% $10.91
11.25%
9999826D
-100.00%
-398,745
-1.64%
$28.05
-
0.00%
2016 Q3 (5 results)
WAB
buy
+839,826
+10.92%
$81.65
232.96% $271.86
10.92%
MCO
-2.72%
-27,019
-0.47%
$108.28
321.33% $456.22
16.64%
LBTYK
-10.47%
-369,299
-1.94%
$33.04
66.98% $10.91
16.62%
IBKR
-100.00%
-28,804
-0.04%
$8.85
974.11% $95.09
0.00%
BRK.B
-100.00%
-315,375
-7.27%
$144.79
-
0.00%
2016 Q2 (8 results)
BRK.B
buy
+315,375
+8.30%
$144.79
-
0.00%
CHTR
buy
+547,937
+22.76%
$228.64
42.27% $132.00
22.76%
9999826D
+765.99%
+352,700
+2.08%
$32.49
-
2.35%
LBTYK
+25.20%
+710,000
+3.70%
$28.65
61.92% $10.91
18.36%
MCO
-4.60%
-47,780
-0.81%
$93.71
386.84% $456.22
16.89%
TDG
-39.86%
-291,067
-13.94%
$263.69
399.36% $1,316.75
21.04%
IBKR
-73.53%
-80,000
-0.13%
$8.85
974.11% $95.09
0.00%
9876540D
-100.00%
-557,331
-20.50%
$202.43
-
0.00%
2016 Q1 (5 results)
MCO
+23.44%
+197,429
+3.51%
$96.56
372.47% $456.22
18.51%
LBTYK
+17.88%
+427,300
+2.96%
$37.56
70.95% $10.91
19.50%
9876540D
+14.36%
+70,000
+2.61%
$202.43
-
0.00%
V
+12.82%
+32,100
+0.45%
$76.48
331.98% $330.38
3.98%
TDG
+5.03%
+34,972
+1.42%
$220.34
497.60% $1,316.75
29.66%
2015 Q4 (4 results)
LBTYK
+37.82%
+655,869
+5.44%
$40.77
73.24% $10.91
19.81%
MCO
+14.68%
+107,860
+2.20%
$100.34
354.68% $456.22
17.18%
TDG
+12.16%
+75,380
+3.50%
$228.45
476.39% $1,316.75
32.29%
9876540D
-2.77%
-13,900
-0.52%
$183.10
-
18.14%
50 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.