Stephen Mandel
Lone Pine Capital
Stephen Mandel Transdigm Group Incorporated stake
total: 304
Lone Pine Capital TDG trades
- Total transactions:
- 36
- New positions:
- 5
- Sold out:
- 4
- Added:
- 11
- Reduced:
- 16
- Held since:
- 2025 Q4
- Held for:
- 3 quarters
- Latest activity:
- 2026 Q2
According to 2026 Q2 report, Stephen Mandel holds 28,532 Transdigm Group Incorporated (TDG) shares with a market value of roughly $38.01M accounting for 0.23% of the overall portfolio. Lone Pine Capital has held TDG since at least 2013 Q2 with about 2.56M shares in our earliest available record. Stephen Mandel later completely sold out the position and invested in Transdigm Group Incorporated again in 2025 Q4. Since at least 2013 Q2, Lone Pine Capital has made 35 more transactions.
Estimated cost basis*
- Weighted AVG buy price:
- $1,251.06
- Weighted AVG sell price:
- $1,332.04
Stephen Mandel's historical trades in Transdigm Group Incorporated
36 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q2
|
0.23%
|
28,532
|
$1,332.04
|
$38,005,765
|
-20.03% (-7,145)
|
-0.08%
|
|
2026 Q1
|
0.33%
|
35,677
|
$1,158.96
|
$41,348,216
|
+85.55% (+16,449)
|
+0.15%
|
|
2025 Q4
|
0.19%
|
19,228
|
$1,329.85
|
$25,570,356
|
new
|
+0.19%
|
|
2023 Q4
|
0.00%
|
0
|
$843.13
|
|
-100% (-436,740)
|
-3.55%
|
|
2023 Q3
|
3.55%
|
436,740
|
$843.13
|
$368,228,596
|
-25.09% (-146,246)
|
-1.13%
|
|
2023 Q2
|
4.78%
|
582,986
|
$894.17
|
$521,288,592
|
-16.58% (-115,862)
|
-0.96%
|
|
2023 Q1
|
4.77%
|
698,848
|
$737.05
|
$515,085,918
|
-9.91% (-76,842)
|
-0.54%
|
|
2022 Q4
|
4.66%
|
775,690
|
$629.65
|
$488,413,209
|
+5.18% (+38,167)
|
+0.23%
|
|
2022 Q3
|
3.65%
|
737,523
|
$524.82
|
$387,067,000
|
new
|
+3.65%
|
|
2021 Q4
|
0.00%
|
0
|
$624.57
|
|
-100% (-784,342)
|
-1.65%
|
|
2021 Q3
|
1.65%
|
$624.57
|
+9.32% (+66,879)
|
|||
|
2021 Q2
|
1.50%
|
$647.29
|
new
|
|||
|
2020 Q4
|
0.00%
|
$475.12
|
-100% (-754,410)
|
|||
|
2020 Q3
|
1.54%
|
$475.12
|
-56.91% (-996,298)
|
|||
|
2020 Q2
|
3.97%
|
$442.05
|
+125.62% (+974,755)
|
|||
|
2020 Q1
|
1.51%
|
$320.19
|
-38.14% (-478,475)
|
|||
|
2019 Q4
|
3.76%
|
$560.00
|
-2.31% (-29,630)
|
|||
|
2019 Q3
|
3.93%
|
$520.67
|
-19.01% (-301,446)
|
|||
|
2019 Q2
|
4.77%
|
$483.80
|
-4.56% (-75,749)
|
|||
|
2019 Q1
|
4.41%
|
$453.99
|
+9.11% (+138,733)
|
|||
|
2018 Q4
|
3.51%
|
$340.06
|
-13.65% (-240,593)
|
|||
|
2018 Q3
|
3.38%
|
$372.30
|
+0.07% (+1,300)
|
|||
|
2018 Q2
|
3.22%
|
$345.14
|
+24.92% (+351,411)
|
|||
|
2017 Q4
|
2.02%
|
$274.62
|
new
|
|||
|
2017 Q1
|
0.00%
|
$248.96
|
-100% (-2,028,392)
|
|||
|
2016 Q4
|
2.64%
|
$248.96
|
-9.88% (-222,383)
|
|||
|
2016 Q3
|
2.91%
|
$289.12
|
-5.45% (-129,645)
|
|||
|
2016 Q2
|
2.90%
|
$263.69
|
+12.40% (+262,561)
|
|||
|
2016 Q1
|
2.37%
|
$220.34
|
-2.46% (-53,500)
|
|||
|
2015 Q4
|
2.21%
|
$228.45
|
-1.99% (-44,064)
|
|||
|
2015 Q1
|
2.07%
|
$218.72
|
+23.99% (+428,587)
|
|||
|
2014 Q3
|
1.32%
|
$184.33
|
+82.44% (+807,441)
|
|||
|
2014 Q2
|
0.68%
|
$167.26
|
-5.27% (-54,523)
|
|||
|
2014 Q1
|
0.86%
|
$185.20
|
-62.66% (-1,734,711)
|
|||
|
2013 Q4
|
2.04%
|
$161.02
|
+8.31% (+212,419)
|
|||
|
2013 Q2
|
2.02%
|
$156.77
|
new or own*
|
|||
* 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.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.