Amphastar Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US03209R1032

SecurityAMPH / Amphastar Pharmaceuticals, Inc.
InstitutionAperio Group, LLC
Latest Disclosed Ownership27,684 shares
Latest Disclosed Value $ 557,000
Aperio Group, LLC reports 11.11% increase in ownership of AMPH / Amphastar Pharmaceuticals, Inc.

On February 5, 2021 - Aperio Group, LLC filed a 13F-HR form disclosing ownership of 27,684 shares of Amphastar Pharmaceuticals, Inc. (US:AMPH) valued at $556,725 USD as of December 31, 2020. The entity filed a previous 13F-HR on November 6, 2020 disclosing 24,916 shares of Amphastar Pharmaceuticals, Inc.. This represents a change in shares of 11.11% during the quarter. The current value of the position is $546,482 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)
2021-02-05 2020-12-31 13F AMPHASTAR PHARMACEUTICALS COM 03209R103 27,684 2,768 11.11 557 19.27 0.0016
2020-11-06 2020-09-30 13F AMPHASTAR PHARMACEUTICALS COM 03209R103 24,916 911 3.80 467 -13.36 0.0016
2020-08-13 2020-06-30 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 24,005 -9,652 -28.68 539 7.80 0.0020
2020-05-05 2020-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 33,657 14,044 71.61 500 32.28 0.0022
2020-02-13 2019-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 19,613 -8,070 -29.15 378 -31.15 0.0014
2019-11-06 2019-09-30 13F AMPHASTAR PHARMACEUTICALS COM 03209R103 27,683 -2,318 -7.73 549 -13.27 0.0022
2019-07-30 2019-06-30 13F AMPHASTAR PHARMACEUTICALS COM 03209R103 30,001 -3,736 -11.07 633 -8.13 0.0026
2019-05-13 2019-03-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 33,737 6,466 23.71 689 26.89 0.0030
2019-05-06 2018-12-31 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 27,271 6,600 31.93 543 36.43 0.0027
2019-02-14 2018-12-31 13F AMPHASTAR PHARMACEUTICALS IN COM 03209R103 26,478 5,807 527
2019-05-06 2018-09-30 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 20,671 2,856 16.03 398 46.32 0.0018
2018-10-17 2018-09-30 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 20,671 2,856 398
2019-05-06 2018-06-30 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 17,815 2,702 17.88 272 -3.89 0.0013
2018-07-30 2018-06-30 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 17,815 2,702 272
2019-05-01 2018-03-31 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 15,113 109 0.73 283 -2.08 0.0014
2018-05-08 2018-03-31 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 15,113 109 283
2019-05-01 2017-12-31 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 15,004 1,334 9.76 289 17.96 0.0015
2018-02-02 2017-12-31 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 15,004 1,334 289
2019-05-01 2017-09-30 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 13,670 789 6.13 245 6.06 0.0014
2017-10-25 2017-09-30 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 13,670 789 244
2019-04-22 2017-06-30 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 12,881 -443 -3.32 231 19.69 0.0014
2017-07-18 2017-06-30 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 12,881 -443 230
2019-04-22 2017-03-31 13F/A-1 AMPHASTAR PHARMACEUTICALS IN COM 03209R103 13,324 13,324 193 0.0013
2017-05-05 2017-03-31 13F AMPHASTAR PHARMACEUTI COMMON 03209R103 13,324 193
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.