Primecap Management’s Illumina ILMN Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | $618M | Buy |
3,514,649
+1,447,350
| +70% | +$212M | 0.37% | 56 |
|
|
2026
Q1 | $255M | Buy |
2,067,299
+77,620
| +4% | +$10.2M | 0.2% | 96 |
|
|
2025
Q4 | $261M | Buy |
1,989,679
+104,400
| +6% | +$12.3M | 0.2% | 98 |
|
|
2025
Q3 | $179M | Sell |
1,885,279
-73,220
| -4% | -$7.26M | 0.14% | 119 |
|
|
2025
Q2 | $187M | Sell |
1,958,499
-412,450
| -17% | -$33.5M | 0.15% | 116 |
|
|
2025
Q1 | $188M | Sell |
2,370,949
-84,870
| -3% | -$9.19M | 0.16% | 97 |
|
|
2024
Q4 | $328M | Sell |
2,455,819
-60,540
| -2% | -$8.62M | 0.25% | 78 |
|
|
2024
Q3 | $328M | Buy |
2,516,359
+87,599
| +4% | +$10.8M | 0.24% | 83 |
|
|
2024
Q2 | $254M | Buy |
2,428,760
+1,984,921
| +447% | +$223M | 0.18% | 91 |
|
|
2024
Q1 | $59.3M | Buy |
443,839
+25,109
| +6% | +$3.37M | 0.04% | 176 |
|
|
2023
Q4 | $56.7M | Sell |
418,730
-10,013
| -2% | -$1.16M | 0.04% | 176 |
|
|
2023
Q3 | $57.3M | Sell |
428,743
-41,616
| -9% | -$6.84M | 0.05% | 167 |
|
|
2023
Q2 | $85.8M | Sell |
470,359
-8,841
| -2% | -$1.79M | 0.07% | 147 |
|
|
2023
Q1 | $108M | Sell |
479,200
-55,764
| -10% | -$11.4M | 0.09% | 135 |
|
|
2022
Q4 | $105M | Sell |
534,964
-52,747
| -9% | -$10.9M | 0.1% | 135 |
|
|
2022
Q3 | $109M | Sell |
587,711
-34,546
| -6% | -$6.83M | 0.11% | 129 |
|
|
2022
Q2 | $112M | Sell |
622,257
-17,506
| -3% | -$4.47M | 0.1% | 132 |
|
|
2022
Q1 | $217M | Sell |
639,763
-43,403
| -6% | -$14.7M | 0.16% | 108 |
|
|
2021
Q4 | $253M | Sell |
683,166
-20,724
| -3% | -$7.85M | 0.18% | 104 |
|
|
2021
Q3 | $278M | Sell |
703,890
-28,918
| -4% | -$13.3M | 0.2% | 98 |
|
|
2021
Q2 | $337M | Sell |
732,808
-15,045
| -2% | -$6.06M | 0.23% | 91 |
|
|
2021
Q1 | $279M | Sell |
747,853
-66,136
| -8% | -$27M | 0.19% | 98 |
|
|
2020
Q4 | $293M | Sell |
813,989
-45,047
| -5% | -$14.4M | 0.22% | 96 |
|
|
2020
Q3 | $258M | Sell |
859,036
-37,070
| -4% | -$12.8M | 0.21% | 92 |
|
|
2020
Q2 | $323M | Sell |
896,106
-56,812
| -6% | -$18.3M | 0.28% | 81 |
|
|
2020
Q1 | $253M | Sell |
952,918
-22,431
| -2% | -$6.27M | 0.25% | 81 |
|
|
2019
Q4 | $315M | Sell |
975,349
-7,607
| -0.8% | -$2.31M | 0.23% | 92 |
|
|
2019
Q3 | $291M | Sell |
982,956
-25,443
| -3% | -$7.5M | 0.23% | 93 |
|
|
2019
Q2 | $361M | Sell |
1,008,399
-20,108
| -2% | -$6.35M | 0.27% | 92 |
|
|
2019
Q1 | $311M | Sell |
1,028,507
-7,987
| -0.8% | -$2.33M | 0.23% | 98 |
|
|
2018
Q4 | $302M | Sell |
1,036,494
-63,006
| -6% | -$19.5M | 0.25% | 93 |
|
|
2018
Q3 | $393M | Sell |
1,099,500
-58,895
| -5% | -$18.9M | 0.27% | 83 |
|
|
2018
Q2 | $315M | Sell |
1,158,395
-767,584
| -40% | -$195M | 0.23% | 92 |
|
|
2018
Q1 | $443M | Sell |
1,925,979
-14,227
| -0.7% | -$3.26M | 0.33% | 72 |
|
|
2017
Q4 | $412M | Sell |
1,940,206
-16,314
| -0.8% | -$3.36M | 0.32% | 74 |
|
|
2017
Q3 | $379M | Sell |
1,956,520
-135,892
| -6% | -$25.3M | 0.31% | 76 |
|
|
2017
Q2 | $353M | Sell |
2,092,412
-37,717
| -2% | -$6.53M | 0.3% | 76 |
|
|
2017
Q1 | $354M | Sell |
2,130,129
-7,833
| -0.4% | -$1.23M | 0.32% | 71 |
|
|
2016
Q4 | $266M | Sell |
2,137,962
-3,537
| -0.2% | -$477K | 0.26% | 80 |
|
|
2016
Q3 | $378M | Sell |
2,141,499
-58,339
| -3% | -$9.33M | 0.38% | 64 |
|
|
2016
Q2 | $300M | Sell |
2,199,838
-35,826
| -2% | -$5.09M | 0.32% | 74 |
|
|
2016
Q1 | $353M | Buy |
2,235,664
+607
| +0% | +$92.8K | 0.37% | 68 |
|
|
2015
Q4 | $417M | Sell |
2,235,057
-3,968
| -0.2% | -$640K | 0.43% | 60 |
|
|
2015
Q3 | $383M | Sell |
2,239,025
-63,075
| -3% | -$12.7M | 0.43% | 62 |
|
|
2015
Q2 | $489M | Sell |
2,302,100
-2,663
| -0.1% | -$520K | 0.48% | 56 |
|
|
2015
Q1 | $416M | Buy |
2,304,763
+144
| +0% | +$27.1K | 0.41% | 62 |
|
|
2014
Q4 | $414M | Sell |
2,304,619
-3,073
| -0.1% | -$542K | 0.42% | 63 |
|
|
2014
Q3 | $368M | Sell |
2,307,692
-8,166
| -0.4% | -$1.37M | 0.39% | 67 |
|
|
2014
Q2 | $402M | Sell |
2,315,858
-9,756
| -0.4% | -$1.46M | 0.44% | 64 |
|
|
2014
Q1 | $336M | Buy |
2,325,614
+220,205
| +10% | +$32.4M | 0.38% | 70 |
|
|
2013
Q4 | $226M | Buy |
2,105,409
+12,747
| +0.6% | +$1.17M | 0.27% | 79 |
|
|
2013
Q3 | $165M | Buy |
2,092,662
+7,672
| +0.4% | +$587K | 0.22% | 90 |
|
|
2013
Q2 | $152M | Buy |
+2,084,990
| New | +$133M | 0.22% | 91 |
|
Other funds holding ILMN
CM
Primecap Management's ILMN Position: Q2 2026 in Review
Primecap Management increased its Illumina (ILMN) stake by 70% in Q2 2026, buying an estimated $212M and bringing the position to 3,514,649 shares worth $618M. The position accounts for 0.37% of the portfolio, ranked #56.
Primecap Management first reported a position in ILMN in Q2 2013 and has held it in 53 quarters since. 932 funds tracked by Wall St. Rank hold ILMN as of Q2 2026.
- Primecap Management held 3,514,649 shares of Illumina worth $618M as of Q2 2026.
- Primecap Management bought 1,447,350 Illumina shares in Q2 2026, an estimated $212M.
- Illumina made up 0.37% of Primecap Management's portfolio in Q2 2026, its #56 holding.
- Primecap Management first reported a position in Illumina in Q2 2013 and has held it in 53 quarters since.
- 932 funds tracked by Wall St. Rank held Illumina as of Q2 2026.
Based on Primecap Management's 13F filing for Q2 2026, filed 14 Aug 2026.