Vault-13

AMPHASTAR PHARMACEUTICALS IN AMPH 2 03.15.29

NOTE 2.000% 3/1 · US DOMESTIC · CUSIP 03209RAB9

44 institutional holders +1 vs Q1 2025
763,880763.9k shares reported held*
$275.1mreported value*
7 new 10 added 9 reduced 6 sold out net sold ≈ $1.3m (+2.0k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $360.14.

Trends to Q2 2025

Institutional holders

Managers reporting a position, each quarter

0204060Q3 24: 36Q4 24: 38Q1 25: 43Q2 25: 4444Q3 24Q4 24Q1 25Q2 25
Numbers
QuarterHolders
Q3 202436
Q4 202438
Q1 202543
Q2 202544

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q4 24: 18 bought or addedQ4 24: 21 cut or sold outQ4 24Q1 25: 22 bought or addedQ1 25: 16 cut or sold outQ1 25Q2 25: 17 bought or addedQ2 25: 15 cut or sold outQ2 25
Numbers
QuarterBought or addedCut or sold out
Q4 20241821
Q1 20252216
Q2 20251715

Biggest buyers

WOLVERINE ASSET MANAGEMENT LLC Added +11,177,000+11.2m
Jump Financial, LLC New +7,000,000+7.0m
Wellesley Asset Management Added +2,253,000+2.3m
JPMORGAN CHASE & CO Added +1,592,000+1.6m
Jefferies Financial Group Inc. Added +989,000+989.0k
Cutler Capital Management, LLC Added +785,000+785.0k
Erste Asset Management GmbH Added +600,000+600.0k
GOLDMAN SACHS GROUP INC New +516,000+516.0k
Universal- Beteiligungs- und Servicegesellschaft mbH Added +200,000+200.0k
JANE STREET GROUP, LLC New +200,000+200.0k

Biggest sellers

READYSTATE ASSET MANAGEMENT LP Sold out -6,468,000-6.5m
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Sold out -4,000,000-4.0m
SILVERBACK ASSET MANAGEMENT LLC Reduced -3,500,000-3.5m
MacKay Shields LLC Reduced -3,090,000-3.1m
WELLS FARGO & COMPANY/MN Reduced -2,867,000-2.9m
SHENKMAN CAPITAL MANAGEMENT INC Sold out -2,609,000-2.6m
CSS LLC/IL Sold out -2,500,000-2.5m
Empyrean Capital Partners, LP Reduced -2,000,000-2.0m
BlackRock, Inc. Reduced -75,000-75.0k
SEI INVESTMENTS CO Reduced -18,000-18.0k

Holders, Q2 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Linden Advisors LP 0.49% of their portfolio New York, NY 92,674,00092.7m $80.4m $80.4m 0.49% Unchanged
2 Wellesley Asset Management 3.77% of their portfolio PORTSMOUTH, NH 45,321,00045.3m $39.5m $39.5m 3.77% Added +2.3m +2,253,000
3 CAMDEN ASSET MANAGEMENT L P /CA 0.56% of their portfolio Los Angeles, CA 27,500,00027.5m $23.7m $23.7m 0.56% Unchanged
4 MacKay Shields LLC 0.56% of their portfolio New York, NY 20,125,00020.1m $17.4m $17.4m 0.56% Reduced -3.1m -3,090,000
5 WOLVERINE ASSET MANAGEMENT LLC 0.29% of their portfolio CHICAGO, IL 19,645,00019.6m $17.1m $17.1m 0.29% Added +11.2m +11,177,000
6 Empyrean Capital Partners, LP 0.60% of their portfolio LOS ANGELES, CA 15,000,00015.0m $13.0m $13.0m 0.60% Reduced -2.0m -2,000,000
7 Calamos Advisors LLC 0.04% of their portfolio NAPERVILLE, IL 10,000,00010.0m $8.7m $8.7m 0.04% Unchanged
8 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 7,995,0008.0m $6.9m $6.9m 0.00% Unchanged
9 Jump Financial, LLC 0.07% of their portfolio Chicago, IL 7,000,0007.0m $6.1m $6.1m 0.07% New
10 LAZARD ASSET MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 5,500,0005.5m $4.8m $4.8m 0.01% Unchanged
11 KIM, LLC 0.50% of their portfolio WICHITA, KS 5,500,0005.5m $4.8m $4.8m 0.50% Unchanged
12 SILVERBACK ASSET MANAGEMENT LLC 0.66% of their portfolio DURHAM, NC 4,923,0004.9m $4.3m $4.3m 0.66% Reduced -3.5m -3,500,000
13 FMR LLC 0.00% of their portfolio BOSTON, MA 4,510,0004.5m $3.9m $3.9m 0.00% Unchanged
14 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 4,458,0004.5m $3.9m $3.9m 0.00% Reduced -2.9m -2,867,000
15 BlackRock, Inc. 0.00% of their portfolio New York, NY 3,350,0003.4m $2.9m $2.9m 0.00% Reduced -75.0k -75,000
16 ADVENT CAPITAL MANAGEMENT /DE/ 0.06% of their portfolio NEW YORK, NY 3,209,0003.2m $2.8m $2.8m 0.06% Added +177.0k +177,000
17 PALISADE CAPITAL MANAGEMENT, LP 0.06% of their portfolio FORT LEE, NJ 2,500,0002.5m $2.2m $2.2m 0.06% Unchanged
18 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,631,0001.6m $1.4m $1.4m 0.00% Added +1.6m +1,592,000
19 Cutler Capital Management, LLC 0.39% of their portfolio WORCESTER, MA 1,300,0001.3m $1.1m $1.1m 0.39% Added +785.0k +785,000
20 Jefferies Financial Group Inc. 0.02% of their portfolio NEW YORK, NY 1,189,0001.2m $1.0m $1.0m 0.02% Added +989.0k +989,000
21 Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio FRANKFURT AM MAIN, 2M 1,000,0001.0m $877.3k $877.3k 0.00% Added +200.0k +200,000
22 Erste Asset Management GmbH 0.00% of their portfolio VIENNA, C4 600,000600.0k $526.8k $526.8k 0.00% Added +600.0k +600,000
23 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 516,000516.0k $445.1k $445.1k 0.00% New
24 SSI INVESTMENT MANAGEMENT LLC 0.02% of their portfolio Los Angeles, CA 372,000372.0k $320.9k $320.9k 0.02% Reduced -7.0k -7,000
25 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 369,000369.0k $319.4k $319.4k 0.00% Added +11.0k +11,000
26 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 300,000300.0k $261.5k $261.5k 0.00% Unchanged
27 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 250,000250.0k $215.0k $215.0k 0.00% Unchanged
28 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 200,000200.0k $173.5k $173.5k 0.00% New
29 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 139,000139.0k $119.9k $119.9k 0.00% Reduced -18.0k -18,000
30 Cetera Investment Advisers 0.00% of their portfolio SCHAUMBURG, IL 120,000120.0k $103.5k $103.5k 0.00% Unchanged
31 OPPENHEIMER ASSET MANAGEMENT INC. 0.00% of their portfolio NEW YORK, NY 82,00082.0k $70.7k $70.7k 0.00% Reduced -1.0k -1,000
32 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 64,00064.0k $55.2k $55.2k 0.00% New
33 NOMURA HOLDINGS INC 0.01% of their portfolio TOKYO, M0 48,88048.9k $1.1m $1.1m 0.01% Unchanged
34 CHOREO, LLC 0.00% of their portfolio ROCKFORD, IL 37,00037.0k $32.1k $32.1k 0.00% New
35 Context Capital Management, LLC 0.80% of their portfolio LAJOLLA, CA 27,20027.2k $23.6m $23.6m 0.80% Added +1.5k +1,500
36 STEPHENS INC /AR/ 0.00% of their portfolio LITTLE ROCK, AR 26,00026.0k $22.4k $22.4k 0.00% Unchanged
37 Capital Investment Advisory Services, LLC 0.00% of their portfolio RALEIGH, NC 16,00016.0k $13.8k $13.8k 0.00% New
38 Balboa Wealth Partners 0.00% of their portfolio SCOTTSDALE, AZ 15,00015.0k $13.0k $13.0k 0.00% Reduced -2.0k -2,000
39 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 14,00014.0k $12.1k $12.1k 0.00% New
40 COMERICA BANK 0.00% of their portfolio DALLAS, TX 11,00011.0k $9.5k $9.5k 0.00% Unchanged
41 INSIGNEO ADVISORY SERVICES, LLC 0.00% of their portfolio MIAMI, FL 11,00011.0k $9.5k $9.5k 0.00% Unchanged
42 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 4,0004.0k $3.5k $3.5k 0.00% Unchanged
43 Alken Asset Management Ltd 1.52% of their portfolio LONDON, X0 1,0001.0k $865.0k $865.0k 1.52% Unchanged
44 CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio BIRMINGHAM, AL 00 $0 $0 — Unchanged