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Oberweis Asset Management’s Alphatec Holdings ATEC Stock Holding History

Oberweis Asset Management’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 		$20.8M Buy
1,908,293
+907,893
+91% +$13.2M 0.61% 51
2025
Q4 		$21M Buy
1,000,400
+539,278
+117% +$9.98M 0.77% 46
2025
Q3 		$6.7M Buy
+461,122
New +$6.42M 0.26% 133
2024
Q3 		– Sell
-1,327,360
Closed -$13.9M – 207
2024
Q2 		$13.9M Sell
1,327,360
-58,520
-4% -$681K 0.85% 36
2024
Q1 		$19.1M Sell
1,385,880
-221,940
-14% -$3.29M 1.38% 5
2023
Q4 		$24.3M Buy
1,607,820
+371,780
+30% +$4.44M 2.26% 4
2023
Q3 		$16M Buy
1,236,040
+255,570
+26% +$4M 1.7% 5
2023
Q2 		$17.6M Buy
980,470
+301,940
+44% +$4.7M 2.14% 4
2023
Q1 		$10.6M Buy
678,530
+175,240
+35% +$2.48M 1.64% 9
2022
Q4 		$6.22M Buy
503,290
+50,730
+11% +$511K 1.32% 14
2022
Q3 		$3.96M Buy
452,560
+50,400
+13% +$399K 0.93% 19
2022
Q2 		$2.63M Sell
402,160
-43,900
-10% -$405K 0.67% 26
2022
Q1 		$5.13M Sell
446,060
-228,110
-34% -$2.47M 1.03% 14
2021
Q4 		$7.71M Buy
674,170
+94,140
+16% +$1.11M 1.41% 10
2021
Q3 		$7.07M Buy
580,030
+144,500
+33% +$2.02M 1.46% 11
2021
Q2 		$6.67M Buy
435,530
+70
+0% +$1.08K 1.46% 10
2021
Q1 		$6.88M Buy
435,460
+172,060
+65% +$2.71M 1.41% 9
2020
Q4 		$3.83M Buy
263,400
+125,800
+91% +$1.33M 1.01% 13
2020
Q3 		$914K Buy
+137,600
New +$776K 0.31% 53

Other funds holding ATEC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 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 $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 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

Oberweis Asset Management's ATEC Position: Q1 2026 in Review

Oberweis Asset Management increased its Alphatec Holdings (ATEC) stake by 91% in Q1 2026, buying an estimated $13.2M and bringing the position to 1,908,293 shares worth $20.8M. The position accounts for 0.61% of the portfolio, ranked #51.

Oberweis Asset Management first reported a position in ATEC in Q3 2020 and has held it in 19 quarters since. The position peaked at $24.3M in Q4 2023. 285 funds tracked by Wall St. Rank hold ATEC as of Q1 2026.

  • Oberweis Asset Management held 1,908,293 shares of Alphatec Holdings worth $20.8M as of Q1 2026.
  • Oberweis Asset Management bought 907,893 Alphatec Holdings shares in Q1 2026, an estimated $13.2M.
  • Alphatec Holdings made up 0.61% of Oberweis Asset Management's portfolio in Q1 2026, its #51 holding.
  • Oberweis Asset Management first reported a position in Alphatec Holdings in Q3 2020 and has held it in 19 quarters since.
  • Oberweis Asset Management's Alphatec Holdings position peaked at $24.3M in Q4 2023.
  • 285 funds tracked by Wall St. Rank held Alphatec Holdings as of Q1 2026.

Based on Oberweis Asset Management's 13F filing for Q1 2026, filed 15 May 2026.