Boston Partners
SEIC icon

Boston Partners’s SEI Investments SEIC Stock Holding History

Boston Partners’s Portfolio SEIC Stock Details SEIC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$139M Buy
+1,770,039
New +$146M 0.15% 186
2017
Q3 		– Sell
-1,072,221
Closed -$57.7M – 779
2017
Q2 		$57.7M Sell
1,072,221
-1,918,308
-64% -$98.8M 0.07% 225
2017
Q1 		$151M Buy
2,990,529
+339,121
+13% +$17.1M 0.19% 150
2016
Q4 		$131M Sell
2,651,408
-529,516
-17% -$24.7M 0.17% 155
2016
Q3 		$145M Sell
3,180,924
-462,383
-13% -$21.7M 0.2% 149
2016
Q2 		$175M Buy
3,643,307
+388,821
+12% +$18.7M 0.25% 136
2016
Q1 		$140M Buy
3,254,486
+330,499
+11% +$13.6M 0.21% 146
2015
Q4 		$153M Buy
2,923,987
+232,657
+9% +$12.1M 0.22% 139
2015
Q3 		$130M Sell
2,691,330
-262,029
-9% -$13.3M 0.2% 148
2015
Q2 		$145M Buy
2,953,359
+525,374
+22% +$24.7M 0.21% 143
2015
Q1 		$107M Sell
2,427,985
-295,704
-11% -$12.4M 0.16% 161
2014
Q4 		$109M Buy
2,723,689
+220,180
+9% +$8.44M 0.16% 150
2014
Q3 		$90.5M Buy
2,503,509
+151,489
+6% +$5.4M 0.15% 157
2014
Q2 		$77.1M Buy
2,352,020
+323,611
+16% +$10.4M 0.13% 172
2014
Q1 		$68.2M Buy
2,028,409
+414,423
+26% +$14.1M 0.12% 172
2013
Q4 		$56.1M Buy
1,613,986
+372,828
+30% +$12.4M 0.11% 172
2013
Q3 		$38.4M Buy
1,241,158
+304,596
+33% +$9.39M 0.09% 194
2013
Q2 		$26.6M Buy
+936,562
New +$27.1M 0.07% 203

Other funds holding SEIC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Loomis, Sayles & Company
Loomis, Sayles & Company Boston, Massachusetts $74.3B AUM 24.01% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Lord, Abbett & Co
Lord, Abbett & Co Jersey City, New Jersey $30.6B AUM 57.44% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Boston Partners's SEIC Position: Q1 2026 in Review

Boston Partners opened a new position in SEI Investments (SEIC) in Q1 2026: 1,770,039 shares worth $139M. The stake represents 0.15% of the portfolio and ranks #186 among its holdings. This is a return to the name: Boston Partners previously reported a position in SEIC as recently as Q2 2017.

Boston Partners first reported a position in SEIC in Q2 2013 and has held it in 18 quarters since. The position peaked at $175M in Q2 2016. 565 funds tracked by Wall St. Rank hold SEIC as of Q1 2026.

  • Boston Partners held 1,770,039 shares of SEI Investments worth $139M as of Q1 2026.
  • SEI Investments was a new Boston Partners position in Q1 2026.
  • SEI Investments made up 0.15% of Boston Partners's portfolio in Q1 2026, its #186 holding.
  • Boston Partners first reported a position in SEI Investments in Q2 2013 and has held it in 18 quarters since.
  • Boston Partners's SEI Investments position peaked at $175M in Q2 2016.
  • 565 funds tracked by Wall St. Rank held SEI Investments as of Q1 2026.

Based on Boston Partners's 13F filing for Q1 2026, filed 11 May 2026.