William Blair Investment Management
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William Blair Investment Management’s DexCom DXCM Stock Holding History

William Blair Investment Management’s Portfolio DXCM Stock Details DXCM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$11.7M Sell
173,453
-21,978
-11% -$1.46M 0.04% 299
2026
Q1 		$12.3M Buy
195,431
+23,858
+14% +$1.66M 0.04% 299
2025
Q4 		$11.4M Buy
+171,573
New +$11.1M 0.03% 308
2023
Q2 		– Sell
-8,155
Closed -$947K – 406
2023
Q1 		$947K Sell
8,155
-160
-2% -$17.9K ﹤0.01% 352
2022
Q4 		$942K Sell
8,315
-31,670
-79% -$3.48M ﹤0.01% 358
2022
Q3 		$3.22M Sell
39,985
-4,135
-9% -$350K 0.01% 338
2022
Q2 		$3.29M Buy
44,120
+100
+0.2% +$9.13K 0.01% 345
2022
Q1 		$5.63M Buy
+44,020
New +$4.82M 0.02% 340
2019
Q3 		– Sell
-1,862,512
Closed -$69.8M – 366
2019
Q2 		$69.8M Sell
1,862,512
-1,896,116
-50% -$59.6M 0.29% 99
2019
Q1 		$112M Sell
3,758,628
-1,263,860
-25% -$44.4M 0.47% 65
2018
Q4 		$150M Sell
5,022,488
-2,938,564
-37% -$93.2M 0.75% 37
2018
Q3 		$285M Sell
7,961,052
-78,192
-1% -$2.42M 0.99% 17
2018
Q2 		$191M Buy
8,039,244
+603,380
+8% +$12.8M 0.71% 31
2018
Q1 		$138M Buy
7,435,864
+385,388
+5% +$5.7M 0.53% 59
2017
Q4 		$101M Buy
7,050,476
+1,377,176
+24% +$17.9M 0.39% 86
2017
Q3 		$69.4M Buy
+5,673,300
New +$100M 0.25% 123

Other funds holding DXCM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $302B AUM 26.44% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

William Blair Investment Management's DXCM Position: Q2 2026 in Review

William Blair Investment Management reduced its DexCom (DXCM) stake by 11% in Q2 2026, selling an estimated $1.46M and leaving 173,453 shares worth $11.7M. The position accounts for 0.04% of the portfolio, ranked #299.

William Blair Investment Management first reported a position in DXCM in Q3 2017 and has held it in 16 quarters since. The position peaked at $285M in Q3 2018. 971 funds tracked by Wall St. Rank hold DXCM as of Q2 2026.

  • William Blair Investment Management held 173,453 shares of DexCom worth $11.7M as of Q2 2026.
  • William Blair Investment Management sold 21,978 DexCom shares in Q2 2026, an estimated $1.46M.
  • DexCom made up 0.04% of William Blair Investment Management's portfolio in Q2 2026, its #299 holding.
  • William Blair Investment Management first reported a position in DexCom in Q3 2017 and has held it in 16 quarters since.
  • William Blair Investment Management's DexCom position peaked at $285M in Q3 2018.
  • 971 funds tracked by Wall St. Rank held DexCom as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.