13FBOX
Amphastar Pharmaceuticals Inc · 13F Institutional Holdings
Options Calculator Rankings
September Rewards Event: invite 5 friends to register as members — no payment required — and get a 1-year PRO membership upgrade. So easy!
A

Amphastar Pharmaceuticals Inc

AMPH
Institutions
37
Combined AUM (Q2 2026)
$319.2M
Combined Shares (Q2 2026)
350.8M
Overall Trend
Increase
All institutions combined
Basis: holder count and combined value / shares merge all share classes of the same company (e.g. Class A / C); each institution is counted once, and value & shares are the sum across classes.
📥 Inflow (Q1 2026→Q2 2026)
+173.2M
19 institutions added · 14 new buys
Est. buy amount
📤 Outflow (Q1 2026→Q2 2026)
-162.3M
21 institutions reduced · 12 exits
Est. sell amount
⚖️ Net Share Change
+11.0M
Net Buy
💰 Est. Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$319.2M
Institutions
37
New Buys
14
Adds
5
Reduces
9
Exits
12
Unchanged
9
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
Context Capital Management, LLC
1.66%1.4%#1$85.2M93.6M$60.6M66.9M+26.7M+39.89%Add
DeepCurrents Investment Group LLC
1.4%#2$41.0M45.0M$00+45.0MNew Buy
OAKTREE CAPITAL MANAGEMENT LP
0.52%0.53%#8$37.2M40.9M$34.5M38.0M+2.8M+7.48%Add
MILLENNIUM MANAGEMENT LLC
0.01%#16$31.0M34.0M$00+34.0MNew Buy
Empyrean Capital Partners, LP
0.73%0.59%#4$22.0M24.3M$18.2M20.3M+4.0M+19.74%Add
Nuveen, LLC
<0.01%#19$19.6M21.6M$00+21.6MNew Buy
CAMDEN ASSET MANAGEMENT L P /CA
0.41%1.28%#9$13.9M15.3M$37.8M41.8M-26.5M-63.36%Reduce
Fort Baker Capital Management LP
0.84%#3$11.4M12.5M$00+12.5MNew Buy
CAPSTONE INVESTMENT ADVISORS, LLC
0.01%#17$9.2M10.1M$00+10.1MNew Buy
Wellesley Asset Management
0.71%2.48%#5$7.7M8.5M$23.6M26.0M-17.6M-67.49%Reduce
KIM, LLC
0.68%#6$6.8M7.5M$00+7.5MNew Buy
BlackRock, Inc.
<0.01%<0.01%#27$6.2M6.8M$5.0M5.5M+1.3M+23.53%Add
Russell Investments Group, Ltd.
<0.01%<0.01%#20$5.5M6.0M$5.2M5.7M+323,000+5.68%Add
Nykredit A/S
0.02%#14$5.0M5.5M$00+5.5MNew Buy
Calamos Advisors LLC
0.02%0.03%#15$4.5M5.0M$9.1M10.0M-5.0M-50.00%Reduce
ADVENT CAPITAL MANAGEMENT /DE/
0.08%0.08%#11$3.5M3.9M$3.7M4.1M-193,000-4.76%Reduce
FMR LLC
<0.01%<0.01%#25$3.4M3.8M$3.4M3.8M-30,000-0.79%Reduce
Pinnacle Holdings, LLC
0.56%1.13%#7$1.8M2.0M$1.9M2.1M-45,000-2.19%Reduce
Universal- Beteiligungs- und Servicegesellschaft mbH
<0.01%<0.01%#21$1.1M1.2M$1.1M1.2M00.00%Unchanged
MORGAN STANLEY
<0.01%<0.01%#30$807,675890,000$7.9M8.8M-7.9M-89.84%Reduce
Cutler Capital Management, LLC
0.2%#10$758,229835,000$00+835,000New Buy
ZAZOVE ASSOCIATES LLC
0.05%#12$581,161640,000$00+640,000New Buy
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
<0.01%#28$303,105334,000$00+334,000New Buy
Bank of New York Mellon Corp
<0.01%<0.01%#29$272,442300,000$272,205300,00000.00%Unchanged
Financial Sense Advisors, Inc.
0.04%0.04%#13$200,946220,000$198,966220,00000.00%Unchanged
BARCLAYS PLC
<0.01%<0.01%#33$73,55981,000$211,413233,000-152,000-65.24%Reduce
Crestwood Advisors Group, LLC
<0.01%#23$31,76335,000$00+35,000New Buy
RAYMOND JAMES FINANCIAL INC
<0.01%<0.01%#34$20,87323,000$26,20229,000-6,000-20.69%Reduce
Jefferies Financial Group Inc.
<0.01%#26$14,57616,000$00+16,000New Buy
Capital Investment Advisory Services, LLC
<0.01%<0.01%#22$14,52016,000$14,45616,00000.00%Unchanged
INSIGNEO ADVISORY SERVICES, LLC
<0.01%<0.01%#24$10,89012,000$10,84212,00000.00%Unchanged
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC
<0.01%<0.01%#32$9,00410,000$9,05610,00000.00%Unchanged
Chicago Capital Management, LLC
0.01%#18$4,9405,440$00+5,440New Buy
WELLS FARGO & COMPANY/MN
<0.01%<0.01%#36$3,6334,000$3,6294,00000.00%Unchanged
Steward Partners Investment Advisory, LLC
<0.01%<0.01%#31$3,6304,000$3,6144,00000.00%Unchanged
MERCER GLOBAL ADVISORS INC /ADV
<0.01%#35$2,7233,000$00+3,000New Buy
OSAIC HOLDINGS, INC.
<0.01%<0.01%#37$56$5600.00%Unchanged

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow