Ken Griffin
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Ken Griffin’s Alphatec Holdings ATEC Stock Holding History

Ken Griffin’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
Q1 		$556K Buy
51,100
+16,500
+48% +$240K ﹤0.01% 9045
2025
Q4 		$728K Sell
34,600
-47,600
-58% -$881K ﹤0.01% 8123
2025
Q3 		$1.2M Sell
82,200
-12,200
-13% -$170K ﹤0.01% 7153
2025
Q2 		$1.05M Sell
94,400
-101,800
-52% -$1.17M ﹤0.01% 6979
2025
Q1 		$1.99M Buy
196,200
+71,700
+58% +$770K ﹤0.01% 5542
2024
Q4 		$1.14M Buy
124,500
+22,400
+22% +$179K ﹤0.01% 6743
2024
Q3 		$568K Buy
102,100
+32,800
+47% +$252K ﹤0.01% 7986
2024
Q2 		$724K Buy
69,300
+29,800
+75% +$347K ﹤0.01% 7294
2024
Q1 		$545K Buy
39,500
+17,100
+76% +$254K ﹤0.01% 8191
2023
Q4 		$338K Sell
22,400
-12,700
-36% -$152K ﹤0.01% 8923
2023
Q3 		$455K Sell
35,100
-900
-3% -$14.1K ﹤0.01% 8256
2023
Q2 		$647K Buy
36,000
+22,000
+157% +$343K ﹤0.01% 7372
2023
Q1 		$218K Sell
14,000
-8,900
-39% -$126K ﹤0.01% 10024
2022
Q4 		$283K Buy
22,900
+8,300
+57% +$83.6K ﹤0.01% 9443
2022
Q3 		$128K Buy
14,600
+2,000
+16% +$15.8K ﹤0.01% 10868
2022
Q2 		$82K Sell
12,600
-9,400
-43% -$86.6K ﹤0.01% 11575
2022
Q1 		$253K Buy
22,000
+1,400
+7% +$15.1K ﹤0.01% 10968
2021
Q4 		$235K Buy
20,600
+10,400
+102% +$123K ﹤0.01% 11501
2021
Q3 		$124K Sell
10,200
-15,500
-60% -$216K ﹤0.01% 12607
2021
Q2 		$394K Buy
25,700
+8,500
+49% +$131K ﹤0.01% 10598
2021
Q1 		$272K Buy
+17,200
New +$271K ﹤0.01% 11060

Other funds holding ATEC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Royal Bank of Canada
Royal Bank of Canada Toronto, Ontario, Canada $570B AUM 27.57% 1-Year Est. Return
BNP Paribas Asset Management
BNP Paribas Asset Management Paris, France $86.1B AUM 29.11% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Ken Griffin's ATEC Position: Q1 2026 in Review

Ken Griffin reduced its Alphatec Holdings (ATEC) stake by 36% in Q1 2026, selling an estimated $6.99M and leaving 857,339 shares worth $9.33M. The position accounts for ﹤0.01% of the portfolio, ranked #3355.

Ken Griffin first reported a position in ATEC in Q3 2013 and has held it in 31 quarters since. The position peaked at $35.5M in Q4 2023. 285 funds tracked by Wall St. Rank hold ATEC as of Q1 2026.

  • Ken Griffin held 857,339 shares of Alphatec Holdings worth $9.33M as of Q1 2026.
  • Ken Griffin sold 480,226 Alphatec Holdings shares in Q1 2026, an estimated $6.99M.
  • Alphatec Holdings made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #3355 holding.
  • Ken Griffin first reported a position in Alphatec Holdings in Q3 2013 and has held it in 31 quarters since.
  • Ken Griffin's Alphatec Holdings position peaked at $35.5M in Q4 2023.
  • 285 funds tracked by Wall St. Rank held Alphatec Holdings as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.