William Blair & Company
LUMN icon

William Blair & Company’s Lumen LUMN Stock Holding History

William Blair & Company’s Portfolio LUMN Stock Details LUMN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$227K Buy
29,596
+350
+1% +$3.07K ﹤0.01% 1528
2026
Q1 		$203K Sell
29,246
-10,568
-27% -$80K ﹤0.01% 1476
2025
Q4 		$309K Buy
39,814
+2,806
+8% +$23.1K ﹤0.01% 1296
2025
Q3 		$226K Buy
37,008
+10,883
+42% +$52.2K ﹤0.01% 1417
2025
Q2 		$114K Buy
+26,125
New +$101K ﹤0.01% 1499
2024
Q3 		– Sell
-22,496
Closed -$24.7K – 1850
2024
Q2 		$24.7K Sell
22,496
-31,196
-58% -$39.6K ﹤0.01% 1672
2024
Q1 		$83.8K Buy
+53,692
New +$83.9K ﹤0.01% 1533
2023
Q4 		– Sell
-62,171
Closed -$88.3K – 1824
2023
Q3 		$88.3K Buy
+62,171
New +$105K ﹤0.01% 1516
2023
Q2 		– Sell
-33,671
Closed -$89.2K – 1843
2023
Q1 		$89.2K Buy
33,671
+10,722
+47% +$43.3K ﹤0.01% 1517
2022
Q4 		$120K Sell
22,949
-2,347
-9% -$14.4K ﹤0.01% 1460
2022
Q3 		$184K Sell
25,296
-998
-4% -$10.2K ﹤0.01% 1400
2022
Q2 		$287K Buy
26,294
+57
+0.2% +$640 ﹤0.01% 1287
2022
Q1 		$296K Sell
26,237
-2,279
-8% -$26.1K ﹤0.01% 1369
2021
Q4 		$358K Buy
28,516
+2,714
+11% +$34.5K ﹤0.01% 1352
2021
Q3 		$320K Sell
25,802
-2,377
-8% -$29.8K ﹤0.01% 1323
2021
Q2 		$383K Buy
28,179
+465
+2% +$6.42K ﹤0.01% 1254
2021
Q1 		$370K Sell
27,714
-2,035
-7% -$25.3K ﹤0.01% 1252
2020
Q4 		$290K Sell
29,749
-6,786
-19% -$67K ﹤0.01% 1290
2020
Q3 		$369K Buy
36,535
+8,156
+29% +$84.8K ﹤0.01% 1059
2020
Q2 		$285K Sell
28,379
-154
-0.5% -$1.54K ﹤0.01% 1111
2020
Q1 		$270K Sell
28,533
-6,496
-19% -$81.2K ﹤0.01% 1054
2019
Q4 		$463K Buy
35,029
+542
+2% +$7.27K ﹤0.01% 1013
2019
Q3 		$430K Sell
34,487
-6,406
-16% -$76.1K ﹤0.01% 996
2019
Q2 		$481K Buy
40,893
+11,753
+40% +$132K ﹤0.01% 997
2019
Q1 		$349K Sell
29,140
-1,761
-6% -$24.5K ﹤0.01% 1093
2018
Q4 		$468K Sell
30,901
-3,952
-11% -$75.4K ﹤0.01% 929
2018
Q3 		$739K Buy
34,853
+3,547
+11% +$74.2K ﹤0.01% 836
2018
Q2 		$584K Buy
31,306
+128
+0.4% +$2.33K ﹤0.01% 903
2018
Q1 		$512K Sell
31,178
-2,429
-7% -$42.1K ﹤0.01% 922
2017
Q4 		$561K Buy
33,607
+1,852
+6% +$31.4K ﹤0.01% 926
2017
Q3 		$600K Sell
31,755
-835
-3% -$17.6K ﹤0.01% 875
2017
Q2 		$778K Buy
+32,590
New +$819K 0.01% 829
2015
Q1 		– Sell
-8,298
Closed -$328K – 2174
2014
Q4 		$328K Buy
8,298
+1,050
+14% +$42K ﹤0.01% 1822
2014
Q3 		$296K Buy
7,248
+675
+10% +$26.5K ﹤0.01% 1843
2014
Q2 		$237K Sell
6,573
-919
-12% -$33K ﹤0.01% 1895
2014
Q1 		$245K Sell
7,492
-337
-4% -$10.3K ﹤0.01% 1825
2013
Q4 		$249K Sell
7,829
-1,131
-13% -$36.1K ﹤0.01% 1800
2013
Q3 		$280K Sell
8,960
-41,270
-82% -$1.4M ﹤0.01% 1747
2013
Q2 		$1.77M Buy
+50,230
New +$1.83M ﹤0.01% 1110

Other funds holding LUMN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

William Blair & Company's LUMN Position: Q2 2026 in Review

William Blair & Company increased its Lumen (LUMN) stake by 1.2% in Q2 2026, buying an estimated $3.07K and bringing the position to 29,596 shares worth $227K. The position accounts for ﹤0.01% of the portfolio, ranked #1528.

William Blair & Company first reported a position in LUMN in Q2 2013 and has held it in 39 quarters since. The position peaked at $1.77M in Q2 2013. 621 funds tracked by Wall St. Rank hold LUMN as of Q2 2026.

  • William Blair & Company held 29,596 shares of Lumen worth $227K as of Q2 2026.
  • William Blair & Company bought 350 Lumen shares in Q2 2026, an estimated $3.07K.
  • Lumen made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1528 holding.
  • William Blair & Company first reported a position in Lumen in Q2 2013 and has held it in 39 quarters since.
  • William Blair & Company's Lumen position peaked at $1.77M in Q2 2013.
  • 621 funds tracked by Wall St. Rank held Lumen as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.