William Blair & Company’s Marathon Petroleum MPC Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $10M | Sell |
41,132
-13,217
| -24% | -$2.67M | 0.03% | 350 |
|
|
2025
Q4 | $8.84M | Buy |
54,349
+10,039
| +23% | +$1.88M | 0.02% | 385 |
|
|
2025
Q3 | $8.54M | Sell |
44,310
-1,096
| -2% | -$193K | 0.02% | 397 |
|
|
2025
Q2 | $7.54M | Sell |
45,406
-4,763
| -9% | -$714K | 0.02% | 407 |
|
|
2025
Q1 | $7.31M | Sell |
50,169
-2,982
| -6% | -$441K | 0.02% | 392 |
|
|
2024
Q4 | $7.41M | Buy |
53,151
+4,908
| +10% | +$749K | 0.02% | 402 |
|
|
2024
Q3 | $7.86M | Sell |
48,243
-2,783
| -5% | -$470K | 0.02% | 396 |
|
|
2024
Q2 | $8.85M | Sell |
51,026
-927
| -2% | -$172K | 0.03% | 344 |
|
|
2024
Q1 | $10.5M | Sell |
51,953
-460
| -0.9% | -$78.7K | 0.03% | 325 |
|
|
2023
Q4 | $7.78M | Buy |
52,413
+2,033
| +4% | +$302K | 0.03% | 361 |
|
|
2023
Q3 | $7.62M | Sell |
50,380
-783
| -2% | -$109K | 0.03% | 354 |
|
|
2023
Q2 | $5.97M | Sell |
51,163
-1,513
| -3% | -$176K | 0.02% | 408 |
|
|
2023
Q1 | $7.1M | Buy |
52,676
+162
| +0.3% | +$20.3K | 0.03% | 364 |
|
|
2022
Q4 | $6.11M | Sell |
52,514
-132
| -0.3% | -$15K | 0.03% | 386 |
|
|
2022
Q3 | $5.23M | Buy |
52,646
+79
| +0.2% | +$7.39K | 0.02% | 397 |
|
|
2022
Q2 | $4.32M | Sell |
52,567
-2,324
| -4% | -$217K | 0.02% | 448 |
|
|
2022
Q1 | $4.69M | Sell |
54,891
-3,006
| -5% | -$229K | 0.02% | 481 |
|
|
2021
Q4 | $3.71M | Buy |
57,897
+41,124
| +245% | +$2.64M | 0.01% | 565 |
|
|
2021
Q3 | $1.04M | Buy |
16,773
+962
| +6% | +$55.3K | ﹤0.01% | 911 |
|
|
2021
Q2 | $955K | Sell |
15,811
-3,373
| -18% | -$198K | ﹤0.01% | 935 |
|
|
2021
Q1 | $1.03M | Buy |
19,184
+539
| +3% | +$27.2K | ﹤0.01% | 885 |
|
|
2020
Q4 | $771K | Sell |
18,645
-1,815
| -9% | -$65.1K | ﹤0.01% | 951 |
|
|
2020
Q3 | $600K | Buy |
20,460
+8,093
| +65% | +$284K | ﹤0.01% | 918 |
|
|
2020
Q2 | $462K | Sell |
12,367
-829
| -6% | -$26.6K | ﹤0.01% | 964 |
|
|
2020
Q1 | $312K | Sell |
13,196
-33,385
| -72% | -$1.54M | ﹤0.01% | 1005 |
|
|
2019
Q4 | $2.81M | Buy |
46,581
+8,935
| +24% | +$559K | 0.01% | 529 |
|
|
2019
Q3 | $2.29M | Sell |
37,646
-192
| -0.5% | -$10.1K | 0.01% | 543 |
|
|
2019
Q2 | $2.11M | Sell |
37,838
-9,201
| -20% | -$504K | 0.01% | 560 |
|
|
2019
Q1 | $2.81M | Buy |
47,039
+51
| +0.1% | +$3.21K | 0.02% | 480 |
|
|
2018
Q4 | $2.77M | Buy |
46,988
+10,091
| +27% | +$689K | 0.02% | 447 |
|
|
2018
Q3 | $2.95M | Buy |
36,897
+6,440
| +21% | +$509K | 0.02% | 477 |
|
|
2018
Q2 | $2.14M | Sell |
30,457
-4,065
| -12% | -$310K | 0.01% | 539 |
|
|
2018
Q1 | $2.52M | Sell |
34,522
-1,135
| -3% | -$78.1K | 0.02% | 499 |
|
|
2017
Q4 | $2.35M | Buy |
35,657
+89
| +0.3% | +$5.45K | 0.02% | 534 |
|
|
2017
Q3 | $2M | Sell |
35,568
-1,971
| -5% | -$106K | 0.02% | 554 |
|
|
2017
Q2 | $1.96M | Sell |
37,539
-3,662
| -9% | -$189K | 0.01% | 572 |
|
|
2017
Q1 | $2.07M | Buy |
41,201
+29,596
| +255% | +$1.47M | 0.02% | 535 |
|
|
2016
Q4 | $584K | Buy |
11,605
+1,935
| +20% | +$87.9K | 0.01% | 783 |
|
|
2016
Q3 | $393K | Sell |
9,670
-674
| -7% | -$27.3K | ﹤0.01% | 917 |
|
|
2016
Q2 | $393K | Buy |
10,344
+1,127
| +12% | +$41.4K | ﹤0.01% | 887 |
|
|
2016
Q1 | $342K | Sell |
9,217
-1,205
| -12% | -$45.8K | ﹤0.01% | 893 |
|
|
2015
Q4 | $540K | Buy |
10,422
+823
| +9% | +$43.1K | 0.01% | 787 |
|
|
2015
Q3 | $444K | Buy |
9,599
+1,535
| +19% | +$79K | ﹤0.01% | 1012 |
|
|
2015
Q2 | $421K | Sell |
8,064
-448
| -5% | -$22.8K | ﹤0.01% | 1817 |
|
|
2015
Q1 | $436K | Buy |
8,512
+244
| +3% | +$11.7K | ﹤0.01% | 1754 |
|
|
2014
Q4 | $373K | Sell |
8,268
-4
| -0% | -$176 | ﹤0.01% | 1778 |
|
|
2014
Q3 | $350K | Buy |
+8,272
| New | +$351K | ﹤0.01% | 1795 |
|
|
2014
Q2 | – | Sell |
-6,734
| Closed | -$292K | – | 2102 |
|
|
2014
Q1 | $292K | Buy |
6,734
+2,014
| +43% | +$88.3K | ﹤0.01% | 1770 |
|
|
2013
Q4 | $216K | Buy |
+4,720
| New | +$182K | ﹤0.01% | 1854 |
|
Other funds holding MPC
VCM
VPM
William Blair & Company's MPC Position: Q1 2026 in Review
William Blair & Company reduced its Marathon Petroleum (MPC) stake by 24% in Q1 2026, selling an estimated $2.67M and leaving 41,132 shares worth $10M. The position accounts for 0.03% of the portfolio, ranked #350.
William Blair & Company first reported a position in MPC in Q4 2013 and has held it in 49 quarters since. The position peaked at $10.5M in Q1 2024. 1,885 funds tracked by Wall St. Rank hold MPC as of Q1 2026.
- William Blair & Company held 41,132 shares of Marathon Petroleum worth $10M as of Q1 2026.
- William Blair & Company sold 13,217 Marathon Petroleum shares in Q1 2026, an estimated $2.67M.
- Marathon Petroleum made up 0.03% of William Blair & Company's portfolio in Q1 2026, its #350 holding.
- William Blair & Company first reported a position in Marathon Petroleum in Q4 2013 and has held it in 49 quarters since.
- William Blair & Company's Marathon Petroleum position peaked at $10.5M in Q1 2024.
- 1,885 funds tracked by Wall St. Rank held Marathon Petroleum as of Q1 2026.
Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.