Vault-13

AMPHASTAR PHARMACEUTICALS IN AMPH 2 03.15.29

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

37 institutional holders +0 vs Q1 2026
555,000555.0k shares reported held*
$320.8mreported value*
11 new 5 added 10 reduced 12 sold out net bought ≈ $5.2m (-471.0k 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 ($3.4m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $584.16.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q3 24: 36Q4 24: 38Q1 25: 43Q2 25: 44Q3 25: 48Q4 25: 44Q1 26: 37Q2 26: 3737Q3 24Q1 25Q3 25Q1 26Q2 26
Numbers
QuarterHolders
Q3 202436
Q4 202438
Q1 202543
Q2 202544
Q3 202548
Q4 202544
Q1 202637
Q2 202637

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 outQ2 25: 17 bought or addedQ2 25: 15 cut or sold outQ2 25Q3 25: 20 bought or addedQ3 25: 18 cut or sold outQ4 25: 12 bought or addedQ4 25: 18 cut or sold outQ4 25Q1 26: 8 bought or addedQ1 26: 23 cut or sold outQ2 26: 16 bought or addedQ2 26: 22 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q4 20241821
Q1 20252216
Q2 20251715
Q3 20252018
Q4 20251218
Q1 2026823
Q2 20261622

Biggest buyers

DeepCurrents Investment Group LLC New +45,016,000+45.0m
MILLENNIUM MANAGEMENT LLC New +34,000,000+34.0m
Context Capital Management, LLC Added +26,700,000+26.7m
Nuveen, LLC New +21,584,000+21.6m
Fort Baker Capital Management LP New +12,500,000+12.5m
CAPSTONE INVESTMENT ADVISORS, LLC New +10,080,000+10.1m
KIM, LLC New +7,500,000+7.5m
Empyrean Capital Partners, LP Added +4,000,000+4.0m
OAKTREE CAPITAL MANAGEMENT LP Added +2,844,000+2.8m
BlackRock, Inc. Added +1,300,000+1.3m

Biggest sellers

Linden Advisors LP Sold out -93,574,000-93.6m
CAMDEN ASSET MANAGEMENT L P /CA Reduced -26,500,000-26.5m
Wellesley Asset Management Reduced -17,566,000-17.6m
MORGAN STANLEY Reduced -5,710,000-5.7m
SILVERBACK ASSET MANAGEMENT LLC Sold out -5,080,000-5.1m
Calamos Advisors LLC Reduced -5,000,000-5.0m
CITIGROUP INC Sold out -3,504,000-3.5m
ROYAL BANK OF CANADA Sold out -1,128,000-1.1m
Cutler Capital Management, LLC Reduced -1,105,000-1.1m
CSS LLC/IL Sold out -510,000-510.0k

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Context Capital Management, LLC 1.72% of their portfolio LAJOLLA, CA 93,631,00093.6m $85.2m $85.2m 1.72% Added +26.7m +26,700,000
2 DeepCurrents Investment Group LLC 1.41% of their portfolio NEW YORK, NY 45,016,00045.0m $41.0m $41.0m 1.41% New
3 OAKTREE CAPITAL MANAGEMENT LP 0.70% of their portfolio LOS ANGELES, CA 40,880,00040.9m $37.2m $37.2m 0.70% Added +2.8m +2,844,000
4 MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio NEW YORK, NY 34,000,00034.0m $31.0m $31.0m 0.02% New
5 Empyrean Capital Partners, LP 0.77% of their portfolio LOS ANGELES, CA 24,265,00024.3m $22.0m $22.0m 0.77% Added +4.0m +4,000,000
6 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 21,584,00021.6m $19.6m $19.6m 0.00% New
7 CAMDEN ASSET MANAGEMENT L P /CA 0.41% of their portfolio Los Angeles, CA 15,327,00015.3m $13.9m $13.9m 0.41% Reduced -26.5m -26,500,000
8 Fort Baker Capital Management LP 0.91% of their portfolio Larkspur, CA 12,500,00012.5m $11.4m $11.4m 0.91% New
9 CAPSTONE INVESTMENT ADVISORS, LLC 0.06% of their portfolio NEW YORK, NY 10,080,00010.1m $9.2m $9.2m 0.06% New
10 Wellesley Asset Management 0.70% of their portfolio PORTSMOUTH, NH 8,460,0008.5m $7.7m $7.7m 0.70% Reduced -17.6m -17,566,000
11 KIM, LLC 0.93% of their portfolio WICHITA, KS 7,500,0007.5m $6.8m $6.8m 0.93% New
12 BlackRock, Inc. 0.00% of their portfolio New York, NY 6,825,0006.8m $6.2m $6.2m 0.00% Added +1.3m +1,300,000
13 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 6,007,0006.0m $5.5m $5.5m 0.00% Added +323.0k +323,000
14 Nykredit A/S 0.02% of their portfolio NORDHAVN, G7 5,500,0005.5m $5.0m $5.0m 0.02% First filing
15 Calamos Advisors LLC 0.02% of their portfolio NAPERVILLE, IL 5,000,0005.0m $4.5m $4.5m 0.02% Reduced -5.0m -5,000,000
16 ADVENT CAPITAL MANAGEMENT /DE/ 0.08% of their portfolio NEW YORK, NY 3,862,0003.9m $3.5m $3.5m 0.08% Reduced -193.0k -193,000
17 FMR LLC 0.00% of their portfolio BOSTON, MA 3,773,0003.8m $3.4m $3.4m 0.00% Reduced -30.0k -30,000
18 Pinnacle Holdings, LLC 0.56% of their portfolio TULSA, OK 2,010,0002.0m $1.8m $1.8m 0.56% Reduced -45.0k -45,000
19 Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio FRANKFURT AM MAIN, 2M 1,200,0001.2m $1.1m $1.1m 0.00% Unchanged
20 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 890,000890.0k $807.7k $807.7k 0.00% Reduced -5.7m -5,710,000
21 Cutler Capital Management, LLC 0.20% of their portfolio WORCESTER, MA 835,000835.0k $758.2k $758.2k 0.20% Reduced -1.1m -1,105,000
22 ZAZOVE ASSOCIATES LLC 0.05% of their portfolio INCLINE VILLAGE, NV 640,000640.0k $581.2k $581.2k 0.05% New
23 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 334,000334.0k $303.1k $303.1k 0.00% New
24 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 300,000300.0k $272.4k $272.4k 0.00% Unchanged
25 Financial Sense Advisors, Inc. 0.04% of their portfolio SAN DIEGO, CA 220,000220.0k $200.9k $200.9k 0.04% Unchanged
26 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 81,00081.0k $73.6k $73.6k 0.00% Reduced -152.0k -152,000
27 Crestwood Advisors Group, LLC 0.00% of their portfolio BOSTON, MA 35,00035.0k $31.8k $31.8k 0.00% New
28 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 23,00023.0k $20.9k $20.9k 0.00% Reduced -6.0k -6,000
29 Jefferies Financial Group Inc. 0.00% of their portfolio NEW YORK, NY 16,00016.0k $14.6k $14.6k 0.00% New
30 Capital Investment Advisory Services, LLC 0.00% of their portfolio RALEIGH, NC 16,00016.0k $14.5k $14.5k 0.00% Unchanged
31 INSIGNEO ADVISORY SERVICES, LLC 0.00% of their portfolio MIAMI, FL 12,00012.0k $10.9k $10.9k 0.00% Unchanged
32 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 10,00010.0k $9.0k $9.0k 0.00% Unchanged
33 Chicago Capital Management, LLC 4.43% of their portfolio CHICAGO, IL 5,4405.4k $5.0m $5.0m 4.43% New
34 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 4,0004.0k $3.6k $3.6k 0.00% Unchanged
35 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 4,0004.0k $3.6k $3.6k 0.00% Unchanged
36 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 66 $5.4k $5.4k 0.00% Unchanged
37 Erste Asset Management GmbH 0.00% of their portfolio VIENNA, C4 00 $0 $0 0.00% Unchanged