Amphastar Pharmaceuticals, Inc.
DE ˙ DB ˙ US03209R1032
15,10 € ↓ −0,31 (−2,04%)
2026-06-04
DELAT PRIS
SecurityDE:29A / Amphastar Pharmaceuticals, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership420,263 shares
Latest Disclosed Value $ 8,232,952
UBS Group AG reports 63.77% increase in ownership of 29A / Amphastar Pharmaceuticals, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 420,263 shares of Amphastar Pharmaceuticals, Inc. (DE:29A) valued at $6,894,415 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 256,624 shares of Amphastar Pharmaceuticals, Inc.. This represents a change in shares of 63.77% during the quarter. The current value of the position is $6,348,073 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-05 2026-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 420,263 163,639 63.77 8,233 19.79 0.0002
2026-01-29 2025-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 256,624 -55,650 -17.82 6,872 -17.42 0.0002
2025-11-13 2025-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 312,274 245,440 367.24 8,322 442.50 0.0013
2025-08-14 2025-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 66,834 -22,490 -25.18 1,535 -40.75 0.0003
2025-05-13 2025-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 89,324 -64,418 -41.90 2,590 -54.64 0.0005
2025-02-14 2024-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 153,742 52,710 52.17 5,708 16.42 0.0011
2024-11-14 2024-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 101,032 -21,649 -17.65 4,903 -0.08 0.0011
2024-08-14 2024-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 122,681 42,229 52.49 4,907 38.93 0.0012
2024-05-13 2024-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 80,452 9,366 13.18 3,533 -19.65 0.0009
2024-02-09 2023-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 71,086 52,714 286.93 4,397 420.85 0.0013
2023-11-09 2023-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 18,372 3,524 23.73 845 -1.06 0.0003
2023-08-11 2023-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 14,848 -8,142 -35.42 853 -1.04 0.0003
2023-05-12 2023-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 22,990 5,916 34.65 862 80.33 0.0003
2023-02-08 2022-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 17,074 1,624 10.51 478 10.14 0.0002
2022-11-10 2022-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 15,450 -12,086 -43.89 434 -54.70 0.0002
2022-08-10 2022-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 27,536 -353 -1.27 958 -4.39 0.0004
2022-05-16 2022-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 27,889 14,471 107.85 1,002 220.13 0.0003
2022-02-14 2021-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 13,418 4,158 44.90 313 77.84 0.0001
2021-11-15 2021-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 9,260 -21,627 -70.02 176 -71.75 0.0001
2021-08-13 2021-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 30,887 -11,056 -26.36 623 -18.99 0.0002
2021-05-12 2021-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 41,943 -1,038 -2.42 769 -11.10 0.0003
2021-02-11 2020-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 42,981 25,930 152.07 865 170.31 0.0003
2020-11-12 2020-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 17,051 -18,491 -52.03 320 -59.90 0.0001
2020-07-31 2020-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 35,542 4,663 15.10 798 74.24 0.0003
2020-05-01 2020-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 30,879 -34,585 -52.83 458 -63.71 0.0002
2020-02-14 2019-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 65,464 1,996 3.14 1,262 0.32 0.0004
2019-11-14 2019-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 63,468 10,632 20.12 1,258 12.83 0.0005
2019-08-14 2019-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 52,836 10,110 23.66 1,115 27.72 0.0004
2019-05-14 2019-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 42,726 28,730 205.27 873 214.03 0.0004
2019-02-14 2018-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 13,996 -1,037 -6.90 278 -3.81 0.0001
2018-11-14 2018-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 15,033 11,798 364.70 289 489.80 0.0001
2018-08-14 2018-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 3,235 -3,712 -53.43 49 -62.60 0.0000
2018-05-15 2018-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 6,947 352 5.34 131 3.15 0.0001
2018-02-14 2017-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 6,595 2,030 44.47 127 54.88 0.0001
2017-11-14 2017-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 4,565 -2,964 -39.37 82 -38.81 0.0000
2017-11-14 2017-06-30 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 7,529 -1,820 -19.47 134 -1.47 0.0001
2017-08-14 2017-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 7,529 -1,820 134
2017-11-14 2017-03-31 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 9,349 -125 -1.32 136 -21.84 0.0001
2017-05-12 2017-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 9,349 -125 136
2017-02-14 2016-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 9,474 -4,226 -30.85 174 -33.08 0.0001
2016-11-14 2016-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 13,700 6,800 98.55 260 134.23 0.0002
2016-08-12 2016-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 6,900 -12,600 -64.62 111 -52.56 0.0001
2016-05-12 2016-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 19,500 -1,074 -5.22 234 -19.86 0.0002
2016-02-16 2015-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 20,574 18,429 859.16 292 1,068.00 0.0002
2015-11-13 2015-09-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 2,145 1,645 329.00 25 177.78 0.0000
2015-08-14 2015-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 500 -3,773 -88.30 9 -85.94 0.0000
2015-05-14 2015-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 4,273 4,044 1,765.94 64 2,033.33 0.0000
2015-02-17 2014-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 229 229 3 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.