SEI Investments
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SEI Investments’s Alphatec Holdings ATEC Stock Holding History

SEI Investments’s Portfolio ATEC Stock Details ATEC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$2.83M Sell
327,128
-270,875
-45% -$2.47M ﹤0.01% 1772
2026
Q1 		$6.51M Buy
598,003
+229,238
+62% +$3.34M 0.01% 1374
2025
Q4 		$7.76M Buy
368,765
+246,879
+203% +$4.57M 0.01% 1174
2025
Q3 		$1.77M Buy
121,886
+43,608
+56% +$607K ﹤0.01% 1749
2025
Q2 		$869K Buy
78,278
+16,645
+27% +$191K ﹤0.01% 1983
2025
Q1 		$625K Sell
61,633
-45,779
-43% -$491K ﹤0.01% 2071
2024
Q4 		$986K Sell
107,412
-620
-0.6% -$4.95K ﹤0.01% 1945
2024
Q3 		$601K Sell
108,032
-3,428
-3% -$26.3K ﹤0.01% 2123
2024
Q2 		$1.16M Buy
111,460
+4,976
+5% +$57.9K ﹤0.01% 1860
2024
Q1 		$1.47M Sell
106,484
-7,918
-7% -$117K ﹤0.01% 1745
2023
Q4 		$1.73M Buy
114,402
+12,847
+13% +$154K ﹤0.01% 1670
2023
Q3 		$1.32M Sell
101,555
-18,746
-16% -$294K ﹤0.01% 1781
2023
Q2 		$2.16M Buy
120,301
+15,629
+15% +$243K ﹤0.01% 1606
2023
Q1 		$1.63M Sell
104,672
-3,638
-3% -$51.4K ﹤0.01% 1710
2022
Q4 		$1.34M Sell
108,310
-1,254
-1% -$12.6K ﹤0.01% 1659
2022
Q3 		$958K Sell
109,564
-7,556
-6% -$59.8K ﹤0.01% 1817
2022
Q2 		$766K Sell
117,120
-6,178
-5% -$56.9K ﹤0.01% 1933
2022
Q1 		$1.42M Sell
123,298
-2,413
-2% -$26.1K ﹤0.01% 1680
2021
Q4 		$1.44M Buy
125,711
+20,446
+19% +$241K ﹤0.01% 1706
2021
Q3 		$1.28M Sell
105,265
-8,802
-8% -$123K ﹤0.01% 1680
2021
Q2 		$1.75M Sell
114,067
-56,283
-33% -$868K ﹤0.01% 1570
2021
Q1 		$2.6M Buy
170,350
+99,349
+140% +$1.56M 0.01% 1337
2020
Q4 		$1.03M Buy
+71,001
New +$750K ﹤0.01% 1676
2020
Q1 		– Sell
-70,420
Closed -$500K – 2342
2019
Q4 		$500K Buy
+70,420
New +$452K ﹤0.01% 1924

Other funds holding ATEC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
B
Braidwell Stamford, Connecticut $2.7B AUM 88.53% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
BNP Paribas Asset Management
BNP Paribas Asset Management Paris, France $99.8B AUM 45.22% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Jacobs Levy Equity Management
Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Royal Bank of Canada
Royal Bank of Canada Toronto, Ontario, Canada $672B AUM 33.48% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

SEI Investments's ATEC Position: Q2 2026 in Review

SEI Investments reduced its Alphatec Holdings (ATEC) stake by 45% in Q2 2026, selling an estimated $2.47M and leaving 327,128 shares worth $2.83M. The position accounts for ﹤0.01% of the portfolio, ranked #1772.

SEI Investments first reported a position in ATEC in Q4 2019 and has held it in 24 quarters since. The position peaked at $7.76M in Q4 2025. 267 funds tracked by Wall St. Rank hold ATEC as of Q2 2026.

  • SEI Investments held 327,128 shares of Alphatec Holdings worth $2.83M as of Q2 2026.
  • SEI Investments sold 270,875 Alphatec Holdings shares in Q2 2026, an estimated $2.47M.
  • Alphatec Holdings made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #1772 holding.
  • SEI Investments first reported a position in Alphatec Holdings in Q4 2019 and has held it in 24 quarters since.
  • SEI Investments's Alphatec Holdings position peaked at $7.76M in Q4 2025.
  • 267 funds tracked by Wall St. Rank held Alphatec Holdings as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.