Teacher Retirement System of Texas
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Teacher Retirement System of Texas’s Amphastar Pharmaceuticals AMPH Stock Holding History

Teacher Retirement System of Texas’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
2025
Q4 		– Sell
-9,356
Closed -$249K – 1644
2025
Q3 		$249K Sell
9,356
-895
-9% -$23.1K ﹤0.01% 1816
2025
Q2 		$235K Sell
10,251
-107
-1% -$2.65K ﹤0.01% 1864
2025
Q1 		$300K Sell
10,358
-1,190
-10% -$38K ﹤0.01% 1742
2024
Q4 		$429K Buy
11,548
+1,736
+18% +$79.4K ﹤0.01% 1301
2024
Q3 		$476K Buy
9,812
+1,229
+14% +$53.9K ﹤0.01% 1215
2024
Q2 		$343K Buy
8,583
+54
+0.6% +$2.24K ﹤0.01% 1320
2024
Q1 		$375K Sell
8,529
-496
-5% -$25.6K ﹤0.01% 1383
2023
Q4 		$558K Sell
9,025
-1,942
-18% -$102K ﹤0.01% 1314
2023
Q3 		$504K Buy
10,967
+507
+5% +$27.7K ﹤0.01% 1393
2023
Q2 		$601K Sell
10,460
-1,451
-12% -$64.3K ﹤0.01% 1335
2023
Q1 		$447K Sell
11,911
-27,583
-70% -$904K ﹤0.01% 1526
2022
Q4 		$1.11M Sell
39,494
-9,662
-20% -$281K 0.01% 1063
2022
Q3 		$1.38M Buy
49,156
+42,037
+590% +$1.37M 0.01% 934
2022
Q2 		$248K Sell
7,119
-798
-10% -$28.5K ﹤0.01% 1550
2022
Q1 		$284K Buy
+7,917
New +$225K ﹤0.01% 1751
2018
Q1 		– Sell
-12,555
Closed -$242K – 1950
2017
Q4 		$242K Buy
+12,555
New +$234K ﹤0.01% 1975
2016
Q3 		– Sell
-5,059
Closed -$82K – 1421
2016
Q2 		$82K Buy
5,059
+901
+22% +$12.7K ﹤0.01% 1957
2016
Q1 		$50K Buy
4,158
+1,032
+33% +$12.2K ﹤0.01% 2151
2015
Q4 		$44K Sell
3,126
-994
-24% -$13.1K ﹤0.01% 2124
2015
Q3 		$48K Buy
4,120
+2,815
+216% +$42.2K ﹤0.01% 2148
2015
Q2 		$23K Buy
+1,305
New +$20.3K ﹤0.01% 2006

Other funds holding AMPH

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
EIP
Epoch Investment Partners New York $16.5B AUM 24.3% 1-Year Est. Return
BTW
Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Teacher Retirement System of Texas's AMPH Position: Q4 2025 in Review

Teacher Retirement System of Texas sold out of Amphastar Pharmaceuticals (AMPH) in Q4 2025, closing a stake of 9,356 shares — an estimated $249K sold.

Teacher Retirement System of Texas first reported a position in AMPH in Q2 2015 and held it in 21 quarters. The position peaked at $1.38M in Q3 2022. 235 funds tracked by Wall St. Rank hold AMPH as of Q4 2025.

  • Teacher Retirement System of Texas reported no remaining Amphastar Pharmaceuticals position as of Q4 2025 after selling out during the quarter.
  • Teacher Retirement System of Texas sold 9,356 Amphastar Pharmaceuticals shares in Q4 2025, an estimated $249K.
  • Teacher Retirement System of Texas first reported a position in Amphastar Pharmaceuticals in Q2 2015 and held it in 21 quarters.
  • Teacher Retirement System of Texas's Amphastar Pharmaceuticals position peaked at $1.38M in Q3 2022.
  • 235 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q4 2025.

Based on Teacher Retirement System of Texas's 13F filing for Q4 2025, filed 28 Jan 2026.