Boston Partners
SEI

Boston Partners’s Solaris Energy Infrastructure SEI Stock Holding History

Boston Partners’s Portfolio SEI Stock Details SEI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-54,931
Closed -$2.2M – 821
2025
Q3 		$2.2M Buy
54,931
+2,022
+4% +$63.2K ﹤0.01% 552
2025
Q2 		$1.5M Buy
52,909
+6,571
+14% +$155K ﹤0.01% 562
2025
Q1 		$1.01M Sell
46,338
-15,812
-25% -$438K ﹤0.01% 562
2024
Q4 		$1.22M Buy
+62,150
New +$1.24M ﹤0.01% 547
2023
Q4 		– Sell
-39,173
Closed -$418K – 789
2023
Q3 		$418K Hold
39,173
– – ﹤0.01% 658
2023
Q2 		$326K Sell
39,173
-4,326
-10% -$34.7K ﹤0.01% 664
2023
Q1 		$371K Hold
43,499
– – ﹤0.01% 626
2022
Q4 		$432K Hold
43,499
– – ﹤0.01% 613
2022
Q3 		$407K Buy
43,499
+10,231
+31% +$105K ﹤0.01% 627
2022
Q2 		$362K Sell
33,268
-3,540
-10% -$42.6K ﹤0.01% 636
2022
Q1 		$416K Hold
36,808
– – ﹤0.01% 634
2021
Q4 		$241K Hold
36,808
– – ﹤0.01% 660
2021
Q3 		$307K Sell
36,808
-42,429
-54% -$344K ﹤0.01% 638
2021
Q2 		$772K Buy
79,237
+21,486
+37% +$228K ﹤0.01% 581
2021
Q1 		$709K Sell
57,751
-4,813
-8% -$54.9K ﹤0.01% 618
2020
Q4 		$509K Sell
62,564
-5,300
-8% -$37.8K ﹤0.01% 595
2020
Q3 		$430K Sell
67,864
-39,590
-37% -$290K ﹤0.01% 613
2020
Q2 		$797K Buy
107,454
+29,275
+37% +$192K ﹤0.01% 565
2020
Q1 		$410K Sell
78,179
-289,637
-79% -$3.04M ﹤0.01% 607
2019
Q4 		$5.15M Buy
367,816
+89,602
+32% +$1.08M 0.01% 374
2019
Q3 		$3.73M Sell
278,214
-197,810
-42% -$2.7M 0.01% 403
2019
Q2 		$7.13M Buy
476,024
+305,780
+180% +$5.07M 0.01% 394
2019
Q1 		$2.8M Sell
170,244
-603,093
-78% -$9.25M ﹤0.01% 493
2018
Q4 		$9.35M Buy
773,337
+457,917
+145% +$6.5M 0.01% 379
2018
Q3 		$5.96M Sell
315,420
-138,740
-31% -$2.23M 0.01% 429
2018
Q2 		$6.49M Buy
+454,160
New +$7.54M 0.01% 421

Other funds holding SEI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
ECA
Encompass Capital Advisors New York $3.34B AUM 167.64% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
SPPAM
Summit Partners Public Asset Management Boston, Massachusetts $3.72B AUM 162.29% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
SA
Situational Awareness San Francisco, California $13.7B AUM 334.5% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return

Boston Partners's SEI Position: Q4 2025 in Review

Boston Partners sold out of Solaris Energy Infrastructure (SEI) in Q4 2025, closing a stake of 54,931 shares — an estimated $2.2M sold.

Boston Partners first reported a position in SEI in Q2 2018 and held it in 26 quarters. The position peaked at $9.35M in Q4 2018. 337 funds tracked by Wall St. Rank hold SEI as of Q4 2025.

  • Boston Partners reported no remaining Solaris Energy Infrastructure position as of Q4 2025 after selling out during the quarter.
  • Boston Partners sold 54,931 Solaris Energy Infrastructure shares in Q4 2025, an estimated $2.2M.
  • Boston Partners first reported a position in Solaris Energy Infrastructure in Q2 2018 and held it in 26 quarters.
  • Boston Partners's Solaris Energy Infrastructure position peaked at $9.35M in Q4 2018.
  • 337 funds tracked by Wall St. Rank held Solaris Energy Infrastructure as of Q4 2025.

Based on Boston Partners's 13F filing for Q4 2025, filed 13 Feb 2026.