William Blair & Company
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William Blair & Company’s MongoDB MDB Stock Holding History

William Blair & Company’s Portfolio MDB Stock Details MDB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$66.3M Sell
270,982
-22,904
-8% -$7.66M 0.19% 116
2025
Q4 		$123M Sell
293,886
-6,124
-2% -$2.23M 0.33% 72
2025
Q3 		$93.1M Sell
300,010
-61,122
-17% -$15.7M 0.25% 99
2025
Q2 		$75.8M Sell
361,132
-85,893
-19% -$15.9M 0.21% 108
2025
Q1 		$78.4M Buy
447,025
+76,568
+21% +$18.7M 0.24% 101
2024
Q4 		$86.2M Buy
370,457
+72,648
+24% +$20.5M 0.25% 95
2024
Q3 		$80.5M Sell
297,809
-18,021
-6% -$4.68M 0.24% 96
2024
Q2 		$78.9M Buy
315,830
+44,608
+16% +$14.1M 0.24% 93
2024
Q1 		$97.3M Buy
271,222
+10,873
+4% +$4.44M 0.31% 78
2023
Q4 		$106M Buy
260,349
+10,263
+4% +$3.89M 0.36% 69
2023
Q3 		$86.5M Sell
250,086
-10,391
-4% -$3.94M 0.33% 74
2023
Q2 		$107M Buy
260,477
+12,746
+5% +$3.72M 0.39% 64
2023
Q1 		$57.8M Buy
247,731
+71,273
+40% +$15M 0.23% 99
2022
Q4 		$34.7M Buy
176,458
+21,170
+14% +$3.77M 0.15% 134
2022
Q3 		$30.8M Buy
155,288
+842
+0.5% +$246K 0.14% 140
2022
Q2 		$40.1M Buy
154,446
+21,641
+16% +$6.77M 0.18% 125
2022
Q1 		$58.9M Sell
132,805
-57,895
-30% -$22.6M 0.21% 112
2021
Q4 		$101M Sell
190,700
-1,255
-0.7% -$643K 0.32% 77
2021
Q3 		$90.5M Buy
191,955
+4,356
+2% +$1.75M 0.31% 76
2021
Q2 		$67.8M Buy
187,599
+18,096
+11% +$5.6M 0.24% 100
2021
Q1 		$45.3M Buy
169,503
+447
+0.3% +$158K 0.17% 139
2020
Q4 		$60.7M Buy
169,056
+1,016
+0.6% +$284K 0.22% 100
2020
Q3 		$38.9M Buy
168,040
+9,645
+6% +$2.09M 0.17% 129
2020
Q2 		$35.9M Buy
158,395
+153,388
+3,063% +$28.4M 0.17% 128
2020
Q1 		$684K Buy
5,007
+3,352
+203% +$495K ﹤0.01% 782
2019
Q4 		$218K Buy
+1,655
New +$217K ﹤0.01% 1278
2019
Q2 		– Sell
-1,885
Closed -$277K – 1755
2019
Q1 		$277K Buy
+1,885
New +$193K ﹤0.01% 1170
2018
Q4 		– Sell
-3,300
Closed -$269K – 1739
2018
Q3 		$269K Buy
+3,300
New +$220K ﹤0.01% 1186

Other funds holding MDB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
DZ Bank
DZ Bank Frankfurt Am Main, Germany $113B AUM 36.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

William Blair & Company's MDB Position: Q1 2026 in Review

William Blair & Company reduced its MongoDB (MDB) stake by 7.8% in Q1 2026, selling an estimated $7.66M and leaving 270,982 shares worth $66.3M. The position accounts for 0.19% of the portfolio, ranked #116.

William Blair & Company first reported a position in MDB in Q3 2018 and has held it in 28 quarters since. The position peaked at $123M in Q4 2025. 812 funds tracked by Wall St. Rank hold MDB as of Q1 2026.

  • William Blair & Company held 270,982 shares of MongoDB worth $66.3M as of Q1 2026.
  • William Blair & Company sold 22,904 MongoDB shares in Q1 2026, an estimated $7.66M.
  • MongoDB made up 0.19% of William Blair & Company's portfolio in Q1 2026, its #116 holding.
  • William Blair & Company first reported a position in MongoDB in Q3 2018 and has held it in 28 quarters since.
  • William Blair & Company's MongoDB position peaked at $123M in Q4 2025.
  • 812 funds tracked by Wall St. Rank held MongoDB as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.