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Mattern Capital Management’s Blackrock BLK Stock Holding History

Mattern Capital Management’s Portfolio BLK Stock Details BLK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.2M Buy
10,621
+234
+2% +$242K 1.19% 35
2026
Q1 		$9.99M Sell
10,387
-21
-0.2% -$22.1K 1.2% 29
2025
Q4 		$11.1M Buy
10,408
+305
+3% +$333K 1.32% 16
2025
Q3 		$11.8M Buy
10,103
+23
+0.2% +$25.7K 1.38% 14
2025
Q2 		$10.6M Buy
10,080
+62
+0.6% +$58.6K 1.27% 18
2025
Q1 		$9.48M Sell
10,018
-554
-5% -$543K 1.21% 29
2024
Q4 		$10.8M Sell
10,572
-569
-5% -$577K 1.41% 11
2024
Q3 		$10.6M Sell
11,141
-52
-0.5% -$45K 1.33% 24
2024
Q2 		$8.81M Sell
11,193
-21
-0.2% -$16.4K 1.22% 30
2024
Q1 		$9.35M Buy
11,214
+9
+0.1% +$7.23K 1.27% 27
2023
Q4 		$9.1M Buy
11,205
+194
+2% +$135K 1.32% 23
2023
Q3 		$7.12M Buy
11,011
+584
+6% +$408K 1.15% 40
2023
Q2 		$7.21M Buy
10,427
+380
+4% +$255K 1.17% 30
2023
Q1 		$6.72M Buy
10,047
+472
+5% +$332K 1.19% 32
2022
Q4 		$6.79M Buy
9,575
+11
+0.1% +$7.34K 1.25% 21
2022
Q3 		$5.26M Sell
9,564
-90
-0.9% -$58.9K 1.1% 48
2022
Q2 		$5.88M Buy
9,654
+588
+6% +$383K 1.16% 42
2022
Q1 		$6.93M Buy
9,066
+497
+6% +$388K 1.24% 26
2021
Q4 		$7.84M Sell
8,569
-93
-1% -$84.9K 1.37% 13
2021
Q3 		$7.26M Sell
8,662
-42
-0.5% -$37.6K 1.43% 8
2021
Q2 		$7.62M Buy
8,704
+128
+1% +$108K 1.51% 7
2021
Q1 		$6.47M Sell
8,576
-24
-0.3% -$17.4K 1.4% 9
2020
Q4 		$6.21M Sell
8,600
-37
-0.4% -$24.5K 1.47% 9
2020
Q3 		$4.87M Sell
8,637
-25
-0.3% -$14.3K 1.27% 25
2020
Q2 		$4.71M Buy
8,662
+590
+7% +$298K 1.37% 11
2020
Q1 		$3.55M Buy
8,072
+91
+1% +$44.8K 1.21% 27
2019
Q4 		$4.01M Buy
+7,981
New +$3.79M 1.11% 42

Other funds holding BLK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Temasek Holdings
Temasek Holdings Singapore $37.3B AUM 12.6% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Mattern Capital Management's BLK Position: Q2 2026 in Review

Mattern Capital Management increased its Blackrock (BLK) stake by 2.3% in Q2 2026, buying an estimated $242K and bringing the position to 10,621 shares worth $10.2M. The position accounts for 1.19% of the portfolio, ranked #35.

Mattern Capital Management first reported a position in BLK in Q4 2019 and has held it in 27 quarters since. The position peaked at $11.8M in Q3 2025. 2,322 funds tracked by Wall St. Rank hold BLK as of Q2 2026.

  • Mattern Capital Management held 10,621 shares of Blackrock worth $10.2M as of Q2 2026.
  • Mattern Capital Management bought 234 Blackrock shares in Q2 2026, an estimated $242K.
  • Blackrock made up 1.19% of Mattern Capital Management's portfolio in Q2 2026, its #35 holding.
  • Mattern Capital Management first reported a position in Blackrock in Q4 2019 and has held it in 27 quarters since.
  • Mattern Capital Management's Blackrock position peaked at $11.8M in Q3 2025.
  • 2,322 funds tracked by Wall St. Rank held Blackrock as of Q2 2026.

Based on Mattern Capital Management's 13F filing for Q2 2026, filed 24 Jul 2026.