BlackRock
TSE

BlackRock’s Trinseo TSE Stock Holding History

BlackRock’s Portfolio TSE Stock Details TSE Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-2,413,178
Closed -$1.2M – 5800
2025
Q4 		$1.2M Buy
2,413,178
+43,506
+2% +$51.9K ﹤0.01% 4255
2025
Q3 		$5.57M Buy
2,369,672
+114,539
+5% +$298K ﹤0.01% 3736
2025
Q2 		$7.04M Buy
2,255,133
+1,497,575
+198% +$4.94M ﹤0.01% 3592
2025
Q1 		$2.79M Sell
757,558
-6,576
-0.9% -$29.9K ﹤0.01% 3890
2024
Q4 		$3.9M Sell
764,134
-7,379
-1% -$36.4K ﹤0.01% 3828
2024
Q3 		$3.94M Sell
771,513
-210,409
-21% -$701K ﹤0.01% 3796
2024
Q2 		$2.27M Sell
981,922
-1,601,850
-62% -$4.99M ﹤0.01% 3929
2024
Q1 		$9.77M Sell
2,583,772
-54,392
-2% -$290K ﹤0.01% 3364
2023
Q4 		$22.1M Buy
2,638,164
+1,610
+0.1% +$10.8K ﹤0.01% 2959
2023
Q3 		$21.5M Sell
2,636,554
-3,151,679
-54% -$40M ﹤0.01% 2901
2023
Q2 		$73.3M Sell
5,788,233
-21,124
-0.4% -$341K ﹤0.01% 2256
2023
Q1 		$121M Sell
5,809,357
-2,521
-0% -$61.7K ﹤0.01% 1885
2022
Q4 		$132M Buy
5,811,878
+157,881
+3% +$3.48M ﹤0.01% 1828
2022
Q3 		$104M Sell
5,653,997
-216,827
-4% -$6.79M ﹤0.01% 1939
2022
Q2 		$226M Sell
5,870,824
-274,277
-4% -$12.4M 0.01% 1433
2022
Q1 		$294M Sell
6,145,101
-107,709
-2% -$5.66M 0.01% 1372
2021
Q4 		$328M Sell
6,252,810
-177,080
-3% -$9.59M 0.01% 1360
2021
Q3 		$347M Sell
6,429,890
-167,852
-3% -$8.73M 0.01% 1291
2021
Q2 		$395M Sell
6,597,742
-174,128
-3% -$11.1M 0.01% 1229
2021
Q1 		$431M Buy
6,771,870
+278,347
+4% +$17M 0.01% 1132
2020
Q4 		$333M Buy
6,493,523
+253,158
+4% +$9.65M 0.01% 1216
2020
Q3 		$160M Sell
6,240,365
-41,545
-0.7% -$1.04M 0.01% 1573
2020
Q2 		$139M Buy
6,281,910
+233,786
+4% +$4.78M 0.01% 1620
2020
Q1 		$110M Sell
6,048,124
-50,520
-0.8% -$1.34M 0.01% 1582
2019
Q4 		$227M Buy
6,098,644
+41,030
+0.7% +$1.67M 0.01% 1386
2019
Q3 		$260M Buy
6,057,614
+2,990,557
+98% +$111M 0.01% 1212
2019
Q2 		$130M Sell
3,067,057
-102,756
-3% -$4.41M 0.01% 1738
2019
Q1 		$144M Sell
3,169,813
-83,108
-3% -$4.02M 0.01% 1653
2018
Q4 		$149M Sell
3,252,921
-46,198
-1% -$2.51M 0.01% 1533
2018
Q3 		$258M Sell
3,299,119
-150,410
-4% -$11.3M 0.01% 1281
2018
Q2 		$245M Buy
3,449,529
+131,583
+4% +$9.79M 0.01% 1304
2018
Q1 		$246M Buy
3,317,946
+187,451
+6% +$14.8M 0.01% 1198
2017
Q4 		$227M Buy
3,130,495
+238,474
+8% +$17M 0.01% 1274
2017
Q3 		$194M Sell
2,892,021
-25,348
-0.9% -$1.69M 0.01% 1375
2017
Q2 		$200M Buy
2,917,369
+764,901
+36% +$50M 0.01% 1302
2017
Q1 		$144M Buy
2,152,468
+2,149,813
+80,972% +$144M 0.01% 1525
2016
Q4 		$157K Sell
2,655
-16,229
-86% -$910K ﹤0.01% 2294
2016
Q3 		$1.07M Buy
18,884
+6,178
+49% +$327K ﹤0.01% 1463
2016
Q2 		$545K Buy
12,706
+11,362
+845% +$500K ﹤0.01% 1635
2016
Q1 		$50K Buy
1,344
+840
+167% +$23.9K ﹤0.01% 2352
2015
Q4 		$14K Buy
504
+300
+147% +$8.74K ﹤0.01% 2738
2015
Q3 		$5K Sell
204
-147
-42% -$3.93K ﹤0.01% 3029
2015
Q2 		$9K Buy
+351
New +$8.98K ﹤0.01% 2881

Other funds holding TSE

KBFS
Kohmann Bosshard Financial Services Fairlawn, Ohio $1.18B AUM 16.34% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return
EWA
EverSource Wealth Advisors Birmingham, Alabama $3.28B AUM 23.66% 1-Year Est. Return
Barclays
Barclays London, United Kingdom $416B AUM 33.63% 1-Year Est. Return
GI
GAMMA Investing Foster City, California $2.69B AUM 42.78% 1-Year Est. Return
RhumbLine Advisers
RhumbLine Advisers Boston, Massachusetts $117B AUM 29.66% 1-Year Est. Return
ME
McIlrath & Eck Arlington, Washington $1.35B AUM 15.78% 1-Year Est. Return
SC
Swan Capital Pensacola, Florida $272M AUM 14.84% 1-Year Est. Return
Rockefeller Capital Management
Rockefeller Capital Management New York $56.4B AUM 24.96% 1-Year Est. Return
EP
Essential Partners Rancho Santa Fe, California $297M AUM 40.85% 1-Year Est. Return

BlackRock's TSE Position: Q1 2026 in Review

BlackRock sold out of Trinseo (TSE) in Q1 2026, closing a stake of 2,413,178 shares — an estimated $1.2M sold.

BlackRock first reported a position in TSE in Q2 2015 and held it in 43 quarters. The position peaked at $431M in Q1 2021. 14 funds tracked by Wall St. Rank hold TSE as of Q1 2026.

  • BlackRock reported no remaining Trinseo position as of Q1 2026 after selling out during the quarter.
  • BlackRock sold 2,413,178 Trinseo shares in Q1 2026, an estimated $1.2M.
  • BlackRock first reported a position in Trinseo in Q2 2015 and held it in 43 quarters.
  • BlackRock's Trinseo position peaked at $431M in Q1 2021.
  • 14 funds tracked by Wall St. Rank held Trinseo as of Q1 2026.

Based on BlackRock's 13F filing for Q1 2026, filed 13 May 2026.