Mark Massey Holdings Activity

AltaRock Partners Portfolio 13F

AltaRock Partners has disclosed a total of 7 changes to the portfolio in the latest (2025 Q1) SEC report(s): increased the number of shares of 2, decreased the number of shares of 4 and completely sold out 1 position(s).

What stocks is Mark Massey buying now?

In the recent quarter Mark Massey has purchased 2 securities: (MSFT) MICROSOFT CORP (added shares +36.32%) and (HLT) HILTON WORLDWIDE HOLDINGS IN (added shares +199.97%).

What does Mark Massey invest in?

Mark Massey's top 5 holdings (by % of portfolio) are (TDG) TRANSDIGM GROUP INC (27.26%), (AMZN) AMAZONCOM INC (19.9%), (MSFT) MICROSOFT CORP (19.46%), (GOOGL) ALPHABET INC-CL A (10.74%) and (MCO) MOODY'S CORP (8.9%).

In the latest report(s) the following changes have been made to the top investments: (TDG) TRANSDIGM GROUP INC (reduced shares -2.06%), (AMZN) AMAZONCOM INC (reduced shares -1.44%), (MSFT) MICROSOFT CORP (added shares +36.32%) and (GOOGL) ALPHABET INC-CL A (reduced shares -0.76%).

History
Ticker
Stock
%
Activity
Share
Change
% change to
Portfolio
Reported
Price*
% difference
Current Price
% of
Portfolio
2019 Q2 (2 results)
CHTR
CHARTER COMMUNICATIONS INC-A
+10.97%
+68,379
+3.22%
$395.18
3.45% $408.81
32.53%
TDG
TRANSDIGM GROUP INC
-5.69%
-36,561
-1.53%
$483.80
214.31% $1,520.64
25.29%
2018 Q4 (6 results)
TDG
TRANSDIGM GROUP INC
+20.22%
+108,054
+4.37%
$340.06
347.17% $1,520.64
26.00%
MCO
MOODY'S CORP
+16.89%
+163,354
+2.72%
$140.04
258.18% $501.59
18.84%
CHTR
CHARTER COMMUNICATIONS INC-A
+12.16%
+73,202
+3.16%
$284.97
43.46% $408.81
29.16%
MA
MASTERCARD INC - A
-0.34%
-1,350
-0.03%
$188.65
197.87% $561.94
8.91%
ORLY
O'REILLY AUTOMOTIVE INC
-1.56%
-56,595
-0.20%
$22.96
292.63% $90.13
12.65%
BKNG
BOOKING HOLDINGS INC
-100.00%
-120,083
-28.35%
$1,984.00
191.80% $5,789.24
0.00%
2018 Q3 (3 results)
BKNG
BOOKING HOLDINGS INC
+16.04%
+16,600
+3.03%
$1,984.00
191.80% $5,789.24
0.00%
CHTR
CHARTER COMMUNICATIONS INC-A
+11.68%
+65,362
+2.40%
$325.88
25.45% $408.81
22.95%
ORLY
O'REILLY AUTOMOTIVE INC
-5.84%
-233,400
-0.62%
$23.15
289.25% $90.13
10.01%
2018 Q2 (4 results)
ORLY
O'REILLY AUTOMOTIVE INC
buy
+4,996,185
+9.42%
$18.24
394.19% $90.13
9.42%
CHTR
CHARTER COMMUNICATIONS INC-A
+16.43%
+96,884
+2.94%
$293.21
39.43% $408.81
20.81%
BKNG
BOOKING HOLDINGS INC
+1.27%
+1,300
+0.27%
$2,027.09
185.59% $5,789.24
21.69%
WAB
WABTEC CORP
-100.00%
-573,126
-5.61%
$81.40
157.19% $209.35
0.00%
2018 Q1 (5 results)
BKNG
BOOKING HOLDINGS INC
buy
+89,410
+24.33%
$2,080.39
178.28% $5,789.24
24.33%
CHTR
CHARTER COMMUNICATIONS INC-A
+34.56%
+134,755
+5.39%
$311.22
31.36% $408.81
21.00%
WAB
WABTEC CORP
-2.91%
-17,200
-0.19%
$81.40
157.19% $209.35
0.00%
TDG
TRANSDIGM GROUP INC
-7.78%
-45,100
-1.58%
$306.94
395.42% $1,520.64
18.77%
PCLN
PRICELINECOM INC+
-100.00%
-94,263
-18.75%
$1,737.74
-
0.00%
2017 Q4 (4 results)
CHTR
CHARTER COMMUNICATIONS INC-A
+88.37%
+205,530
+9.07%
$335.96
21.68% $408.81
19.33%
PCLN
PRICELINECOM INC+
+18.70%
+14,850
+3.39%
$1,737.74
-
0.00%
TDG
TRANSDIGM GROUP INC
-10.36%
-60,635
-2.42%
$274.62
453.72% $1,520.64
20.91%
MCO
MOODY'S CORP
-10.67%
-115,529
-2.24%
$147.61
239.81% $501.59
18.75%
2017 Q3 (2 results)
TDG
TRANSDIGM GROUP INC
+13.00%
+74,367
+2.78%
$255.65
494.81% $1,520.64
24.17%
CHTR
CHARTER COMMUNICATIONS INC-A
-43.35%
-177,964
-9.46%
$363.42
12.49% $408.81
12.36%
2017 Q2 (3 results)
TDG
TRANSDIGM GROUP INC
+6.73%
+36,094
+1.37%
$268.87
465.57% $1,520.64
21.67%
CHTR
CHARTER COMMUNICATIONS INC-A
+6.48%
+24,875
+1.19%
$336.85
21.36% $408.81
19.48%
LBTYK
LIBERTY GLOBAL PLC- C
-100.00%
-1,254,232
-6.19%
$35.04
70.58% $10.31
0.00%
2017 Q1 (7 results)
PCLN
PRICELINECOM INC+
+19.94%
+13,200
+3.48%
$1,779.97
-
20.96%
MCO
MOODY'S CORP
+0.38%
+4,100
+0.07%
$112.04
347.69% $501.59
17.99%
WAB
WABTEC CORP
-0.49%
-3,400
-0.04%
$78.00
168.40% $209.35
7.94%
MA
MASTERCARD INC - A
-1.34%
-2,835
-0.09%
$112.47
399.63% $561.94
6.64%
TDG
TRANSDIGM GROUP INC
-9.37%
-28,271
-1.81%
$220.16
590.70% $1,520.64
17.50%
CHTR
CHARTER COMMUNICATIONS INC-A
-19.95%
-96,100
-4.67%
$327.32
24.90% $408.81
18.72%
LBTYK
LIBERTY GLOBAL PLC- C
-51.49%
-1,331,127
-6.92%
$35.04
70.58% $10.31
0.00%
2016 Q4 (7 results)
PCLN
PRICELINECOM INC+
buy
+36,748
+14.22%
$1,466.06
-
14.22%
TDG
TRANSDIGM GROUP INC
+34.69%
+152,356
+5.56%
$248.96
510.80% $1,520.64
21.58%
MCO
MOODY'S CORP
+11.74%
+113,336
+1.57%
$94.27
432.08% $501.59
14.90%
CHTR
CHARTER COMMUNICATIONS INC-A
-12.10%
-66,300
-2.80%
$287.92
41.99% $408.81
20.32%
WAB
WABTEC CORP
-17.86%
-81,000
-1.82%
$83.02
152.17% $209.35
8.39%
LBTYK
LIBERTY GLOBAL PLC- C
-18.13%
-326,310
-2.49%
$29.70
65.29% $10.31
11.25%
9999826D
LIBERTY GLOBAL PLC LILAC - C
-100.00%
-398,745
-1.64%
$28.05
-
0.00%
2016 Q3 (5 results)
WAB
WABTEC CORP
buy
+839,826
+10.92%
$81.65
156.40% $209.35
10.92%
MCO
MOODY'S CORP
-2.72%
-27,019
-0.47%
$108.28
363.24% $501.59
16.64%
LBTYK
LIBERTY GLOBAL PLC- C
-10.47%
-369,299
-1.94%
$33.04
68.80% $10.31
16.62%
BRK.B
BERKSHIRE HATHAWAY INC CL-B
-100.00%
-208,147
-7.27%
$144.79
235.50% $485.77
0.00%
IBKR
INTERACTIVE BROKERS GRO-CL A
-100.00%
-28,804
-0.04%
$8.85
525.90% $55.41
0.00%
48 of 232

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.