William Blair & Company’s TransDigm Group TDG Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $193M | Sell |
166,248
-3,982
| -2% | -$5.22M | 0.55% | 41 |
|
|
2025
Q4 | $226M | Sell |
170,230
-2,419
| -1% | -$3.17M | 0.61% | 37 |
|
|
2025
Q3 | $228M | Sell |
172,649
-304
| -0.2% | -$435K | 0.61% | 38 |
|
|
2025
Q2 | $263M | Sell |
172,953
-2,268
| -1% | -$3.19M | 0.73% | 29 |
|
|
2025
Q1 | $242M | Sell |
175,221
-3,122
| -2% | -$4.16M | 0.73% | 31 |
|
|
2024
Q4 | $226M | Buy |
178,343
+674
| +0.4% | +$888K | 0.66% | 40 |
|
|
2024
Q3 | $254M | Buy |
177,669
+285
| +0.2% | +$371K | 0.74% | 31 |
|
|
2024
Q2 | $227M | Buy |
177,384
+188
| +0.1% | +$241K | 0.7% | 33 |
|
|
2024
Q1 | $218M | Buy |
177,196
+4,213
| +2% | +$4.74M | 0.69% | 35 |
|
|
2023
Q4 | $175M | Buy |
172,983
+477
| +0.3% | +$440K | 0.6% | 42 |
|
|
2023
Q3 | $145M | Buy |
172,506
+1,940
| +1% | +$1.7M | 0.56% | 44 |
|
|
2023
Q2 | $153M | Sell |
170,566
-448
| -0.3% | -$354K | 0.56% | 42 |
|
|
2023
Q1 | $126M | Sell |
171,014
-4,590
| -3% | -$3.28M | 0.5% | 47 |
|
|
2022
Q4 | $111M | Buy |
175,604
+1,469
| +0.8% | +$865K | 0.48% | 51 |
|
|
2022
Q3 | $91.4M | Sell |
174,135
-1,423
| -0.8% | -$849K | 0.42% | 61 |
|
|
2022
Q2 | $94.2M | Buy |
175,558
+659
| +0.4% | +$389K | 0.42% | 56 |
|
|
2022
Q1 | $114M | Sell |
174,899
-3,419
| -2% | -$2.2M | 0.4% | 59 |
|
|
2021
Q4 | $113M | Sell |
178,318
-3,232
| -2% | -$2.02M | 0.36% | 65 |
|
|
2021
Q3 | $113M | Sell |
181,550
-1,601
| -0.9% | -$1M | 0.39% | 56 |
|
|
2021
Q2 | $119M | Sell |
183,151
-1,814
| -1% | -$1.14M | 0.41% | 52 |
|
|
2021
Q1 | $109M | Sell |
184,965
-929
| -0.5% | -$547K | 0.41% | 55 |
|
|
2020
Q4 | $115M | Sell |
185,894
-4,491
| -2% | -$2.47M | 0.42% | 56 |
|
|
2020
Q3 | $90.5M | Sell |
190,385
-426
| -0.2% | -$200K | 0.38% | 58 |
|
|
2020
Q2 | $84.3M | Buy |
190,811
+32,357
| +20% | +$12.2M | 0.4% | 56 |
|
|
2020
Q1 | $50.7M | Sell |
158,454
-5,375
| -3% | -$2.93M | 0.32% | 70 |
|
|
2019
Q4 | $91.7M | Buy |
163,829
+319
| +0.2% | +$175K | 0.47% | 48 |
|
|
2019
Q3 | $0 | Sell |
163,510
-4,679
| -3% | -$2.4M | ﹤0.01% | 1756 |
|
|
2019
Q2 | $81.4M | Buy |
168,189
+1,709
| +1% | +$800K | 0.47% | 52 |
|
|
2019
Q1 | $75.6M | Buy |
166,480
+2,851
| +2% | +$1.16M | 0.46% | 54 |
|
|
2018
Q4 | $55.6M | Sell |
163,629
-4,077
| -2% | -$1.4M | 0.41% | 63 |
|
|
2018
Q3 | $62.4M | Buy |
167,706
+1,256
| +0.8% | +$452K | 0.38% | 66 |
|
|
2018
Q2 | $57.4M | Buy |
166,450
+659
| +0.4% | +$217K | 0.39% | 62 |
|
|
2018
Q1 | $50.9M | Sell |
165,791
-1,860
| -1% | -$548K | 0.36% | 71 |
|
|
2017
Q4 | $46M | Sell |
167,651
-1,717
| -1% | -$466K | 0.31% | 83 |
|
|
2017
Q3 | $43.3M | Sell |
169,368
-4,673
| -3% | -$1.26M | 0.32% | 79 |
|
|
2017
Q2 | $46.8M | Sell |
174,041
-15,119
| -8% | -$3.84M | 0.35% | 72 |
|
|
2017
Q1 | $41.7M | Sell |
189,160
-69,277
| -27% | -$16.5M | 0.34% | 84 |
|
|
2016
Q4 | $64.3M | Sell |
258,437
-3,988
| -2% | -$1.05M | 0.58% | 46 |
|
|
2016
Q3 | $75.9M | Sell |
262,425
-2,868
| -1% | -$805K | 0.67% | 34 |
|
|
2016
Q2 | $70M | Sell |
265,293
-794
| -0.3% | -$194K | 0.65% | 40 |
|
|
2016
Q1 | $58.6M | Sell |
266,087
-1,086
| -0.4% | -$237K | 0.55% | 51 |
|
|
2015
Q4 | $61M | Sell |
267,173
-79,892
| -23% | -$18M | 0.57% | 44 |
|
|
2015
Q3 | $73.7M | Sell |
347,065
-901,667
| -72% | -$206M | 0.64% | 31 |
|
|
2015
Q2 | $281M | Buy |
1,248,732
+60,651
| +5% | +$13.6M | 0.42% | 38 |
|
|
2015
Q1 | $260M | Buy |
1,188,081
+143,885
| +14% | +$30.3M | 0.4% | 47 |
|
|
2014
Q4 | $205M | Sell |
1,044,196
-154,216
| -13% | -$29.1M | 0.33% | 72 |
|
|
2014
Q3 | $221M | Sell |
1,198,412
-9,677
| -0.8% | -$1.73M | 0.38% | 53 |
|
|
2014
Q2 | $202M | Sell |
1,208,089
-440,113
| -27% | -$79.3M | 0.33% | 70 |
|
|
2014
Q1 | $305M | Buy |
1,648,202
+300,579
| +22% | +$52.6M | 0.51% | 19 |
|
|
2013
Q4 | $217M | Buy |
1,347,623
+109,808
| +9% | +$16.4M | 0.36% | 61 |
|
|
2013
Q3 | $172M | Buy |
1,237,815
+126,035
| +11% | +$17.9M | 0.31% | 75 |
|
|
2013
Q2 | $174M | Buy |
+1,111,780
| New | +$167M | 0.34% | 66 |
|
Other funds holding TDG
VCM
VPM
William Blair & Company's TDG Position: Q1 2026 in Review
William Blair & Company reduced its TransDigm Group (TDG) stake by 2.3% in Q1 2026, selling an estimated $5.22M and leaving 166,248 shares worth $193M. The position accounts for 0.55% of the portfolio, ranked #41.
William Blair & Company first reported a position in TDG in Q2 2013 and has held it in 52 quarters since. The position peaked at $305M in Q1 2014. 1,107 funds tracked by Wall St. Rank hold TDG as of Q1 2026.
- William Blair & Company held 166,248 shares of TransDigm Group worth $193M as of Q1 2026.
- William Blair & Company sold 3,982 TransDigm Group shares in Q1 2026, an estimated $5.22M.
- TransDigm Group made up 0.55% of William Blair & Company's portfolio in Q1 2026, its #41 holding.
- William Blair & Company first reported a position in TransDigm Group in Q2 2013 and has held it in 52 quarters since.
- William Blair & Company's TransDigm Group position peaked at $305M in Q1 2014.
- 1,107 funds tracked by Wall St. Rank held TransDigm Group as of Q1 2026.
Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.