AssetMark Inc
AMPH icon

AssetMark Inc’s Amphastar Pharmaceuticals AMPH Stock Holding History

AssetMark Inc’s Portfolio AMPH Stock Details AMPH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		$2.04M Buy
79,124
+10,534
+15% +$228K ﹤0.01% 946
2026
Q2 		$1.38M Buy
68,590
+14,852
+28% +$300K ﹤0.01% 1028
2026
Q1 		$1.05M Sell
53,738
-621
-1% -$15.2K ﹤0.01% 1032
2025
Q4 		$1.46M Sell
54,359
-2,128
-4% -$54.8K ﹤0.01% 933
2025
Q3 		$1.51M Buy
56,487
+12,721
+29% +$328K ﹤0.01% 891
2025
Q2 		$1M Buy
43,766
+3,229
+8% +$80.1K ﹤0.01% 922
2025
Q1 		$1.18M Sell
40,537
-1,384
-3% -$44.2K ﹤0.01% 837
2024
Q4 		$1.56M Sell
41,921
-1,985
-5% -$90.8K ﹤0.01% 764
2024
Q3 		$2.13M Buy
43,906
+3,650
+9% +$160K 0.01% 637
2024
Q2 		$1.61M Buy
40,256
+4,479
+13% +$186K 0.01% 666
2024
Q1 		$1.57M Sell
35,777
-10
-0% -$516 0.01% 632
2023
Q4 		$2.21M Buy
35,787
+4,596
+15% +$241K 0.01% 518
2023
Q3 		$1.43M Buy
31,191
+94
+0.3% +$5.13K 0.01% 560
2023
Q2 		$1.79M Buy
31,097
+1,424
+5% +$63.1K 0.01% 500
2023
Q1 		$1.11M Buy
29,673
+1,727
+6% +$56.6K ﹤0.01% 581
2022
Q4 		$783K Buy
27,946
+1,814
+7% +$52.7K ﹤0.01% 635
2022
Q3 		$734K Buy
+26,132
New +$853K ﹤0.01% 586
2018
Q1 		– Sell
-11
Closed – – 1421
2017
Q4 		$0 Buy
+11
New +$205 ﹤0.01% 1858
2017
Q1 		– Sell
-5
Closed – – 1265
2016
Q4 		$0 Buy
+5
New +$97 ﹤0.01% 1240

Other funds holding AMPH

Bridge City Capital
Bridge City Capital Lake Oswego, Oregon $480M AUM 47.16% 1-Year Est. Return
LAM Group
LAM Group Lake Oswego, Oregon $199M AUM 14.21% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $83.2B AUM 35.34% 1-Year Est. Return
SummerHaven Investment Management
SummerHaven Investment Management Stamford, Connecticut $179M AUM 57.61% 1-Year Est. Return
SteelPeak Wealth
SteelPeak Wealth Woodland Hills, California $4.07B AUM 38.25% 1-Year Est. Return
Profund Advisors
Profund Advisors Bethesda, Maryland $3.48B AUM 66.96% 1-Year Est. Return
Polaris Capital Management
Polaris Capital Management Boston, Massachusetts $953M AUM 27.74% 1-Year Est. Return
Illumine Investment Management
Illumine Investment Management Poulsbo, Washington $144M AUM 33.61% 1-Year Est. Return
Achmea Investment Management
Achmea Investment Management Zeist, Netherlands $12.6B AUM 25.68% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $52.9B AUM 36.03% 1-Year Est. Return

AssetMark Inc's AMPH Position: Q3 2026 in Review

AssetMark Inc increased its Amphastar Pharmaceuticals (AMPH) stake by 15% in Q3 2026, buying an estimated $228K and bringing the position to 79,124 shares worth $2.04M. The position accounts for ﹤0.01% of the portfolio, ranked #946.

AssetMark Inc first reported a position in AMPH in Q4 2016 and has held it in 19 quarters since. The position peaked at $2.21M in Q4 2023. 58 funds tracked by Wall St. Rank hold AMPH as of Q3 2026.

  • AssetMark Inc held 79,124 shares of Amphastar Pharmaceuticals worth $2.04M as of Q3 2026.
  • AssetMark Inc bought 10,534 Amphastar Pharmaceuticals shares in Q3 2026, an estimated $228K.
  • Amphastar Pharmaceuticals made up ﹤0.01% of AssetMark Inc's portfolio in Q3 2026, its #946 holding.
  • AssetMark Inc first reported a position in Amphastar Pharmaceuticals in Q4 2016 and has held it in 19 quarters since.
  • AssetMark Inc's Amphastar Pharmaceuticals position peaked at $2.21M in Q4 2023.
  • 58 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q3 2026.

Based on AssetMark Inc's 13F filing for Q3 2026, filed 21 Oct 2026.