| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| AQR Arbitrage LLC | 14 | 14 | 0.16% | 0.33% | 0.43% | Q2 2017 | Q3 2020 | 14 |
| Calamos Advisors LLC | 14 | 14 | 0.02% | 0.05% | 0.08% | Q2 2017 | Q3 2020 | 14 |
| Context Capital Management, LLC | 14 | 14 | 0.35% | 3.75% | 7.74% | Q2 2017 | Q3 2020 | 14 |
| MORGAN STANLEY | 14 | 14 | 0.00% | 0.00% | 0.00% | Q2 2017 | Q3 2020 | 14 |
| BlackRock Inc. | 14 | 14 | 0.00% | 0.00% | 0.00% | Q2 2017 | Q3 2020 | 14 |
| JPMORGAN CHASE & CO | 13 | 13 | 0.00% | 0.00% | 0.00% | Q3 2017 | Q3 2020 | 13 |
| WOLVERINE ASSET MANAGEMENT LLC | 11 | 2 | 0.13% | 0.28% | 0.41% | Q2 2017 | Q3 2020 | 13 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 13 | 13 | 0.08% | 1.52% | 2.53% | Q2 2017 | Q2 2020 | 13 |
| Citadel Advisors | 13 | 13 | 0.00% | 0.01% | 0.03% | Q2 2017 | Q2 2020 | 13 |
| CITIGROUP INC | 6 | 2 | 0.00% | 0.00% | 0.01% | Q2 2017 | Q3 2020 | 12 |
| Bank of New York Mellon Corp | 11 | 11 | 0.00% | 0.00% | 0.00% | Q3 2017 | Q1 2020 | 11 |
| CREDIT SUISSE AG/ | 10 | 1 | 0.00% | 0.00% | 0.00% | Q3 2017 | Q3 2020 | 11 |
| DEUTSCHE BANK AG\ | 11 | 11 | 0.00% | 0.01% | 0.01% | Q2 2017 | Q4 2019 | 11 |
| NOMURA HOLDINGS INC | 10 | 1 | 0.00% | 0.00% | 0.04% | Q2 2017 | Q2 2020 | 11 |
| UBS OCONNOR LLC | 6 | 3 | 0.07% | 0.58% | 0.94% | Q3 2017 | Q3 2020 | 9 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 9 | 9 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2020 | 9 |
| Telemetry Investments, L.L.C. | 9 | 9 | 0.18% | 1.53% | 3.61% | Q2 2017 | Q2 2019 | 9 |
| UBS Group AG | 4 | 4 | 0.00% | 0.00% | 0.01% | Q2 2017 | Q3 2019 | 8 |
| CAMDEN ASSET MANAGEMENT L P /CA | 8 | 8 | 0.72% | 0.84% | 1.04% | Q2 2017 | Q1 2019 | 8 |
| Allianz Asset Management GmbH | 8 | 8 | 0.02% | 0.02% | 0.04% | Q2 2018 | Q1 2020 | 8 |
| PALISADE CAPITAL MANAGEMENT, LP | 8 | 8 | 0.06% | 0.13% | 0.18% | Q2 2017 | Q1 2019 | 8 |
| GOLDMAN SACHS GROUP INC | 7 | 7 | 0.00% | 0.00% | 0.00% | Q1 2019 | Q3 2020 | 7 |
| OAKTREE CAPITAL MANAGEMENT LP | 3 | 2 | 0.02% | 0.11% | 0.20% | Q3 2017 | Q3 2020 | 7 |
| BANK OF AMERICA CORP /DE/ | 7 | 7 | 0.00% | 0.00% | 0.00% | Q2 2018 | Q4 2019 | 7 |
| SSI INVESTMENT MANAGEMENT LLC | 7 | 7 | 0.32% | 0.41% | 0.47% | Q2 2017 | Q4 2018 | 7 |
| WHITEBOX ADVISORS LLC | 7 | 7 | 0.26% | 0.62% | 1.05% | Q1 2019 | Q3 2020 | 7 |
| City Financial Investment Co Ltd | 7 | 7 | 0.21% | 0.88% | 1.72% | Q2 2017 | Q4 2018 | 7 |
| CAPSTONE INVESTMENT ADVISORS, LLC | 6 | 1 | 0.01% | 0.05% | 0.17% | Q2 2017 | Q3 2020 | 7 |
| SG Americas Securities, LLC | 7 | 7 | 0.02% | 0.02% | 0.02% | Q1 2019 | Q3 2020 | 7 |
| STEELHEAD PARTNERS LLC | 5 | 2 | 0.54% | 2.73% | 4.76% | Q2 2017 | Q1 2019 | 7 |
| Opera Trading Capital | 6 | 6 | 0.30% | 0.66% | 1.05% | Q2 2017 | Q3 2018 | 6 |
| Birch Grove Capital LP | 6 | 6 | 8.30% | 12.46% | 18.53% | Q2 2019 | Q3 2020 | 6 |
| IRON Financial LLC | 5 | 5 | 0.25% | 0.32% | 0.40% | Q2 2018 | Q2 2019 | 5 |
| CSS LLC/IL | 2 | 1 | 0.05% | 0.14% | 0.26% | Q1 2018 | Q4 2019 | 5 |
| FALCON POINT CAPITAL, LLC | 5 | 5 | 0.06% | 0.20% | 0.31% | Q4 2017 | Q4 2018 | 5 |
| AMERIPRISE FINANCIAL INC | 4 | 1 | 0.00% | 0.00% | 0.00% | Q4 2017 | Q3 2020 | 5 |
| LAZARD ASSET MANAGEMENT LLC | 2 | 2 | 0.00% | 0.01% | 0.03% | Q2 2017 | Q3 2018 | 4 |
| WELLS FARGO & COMPANY/MN | 4 | 4 | 0.00% | 0.00% | 0.00% | Q2 2017 | Q1 2018 | 4 |
| Jabre Capital Partners S.A. | 4 | 4 | 0.11% | 0.73% | 1.04% | Q2 2017 | Q1 2018 | 4 |
| BASSO CAPITAL MANAGEMENT, L.P. | 4 | 4 | 0.73% | 1.03% | 1.46% | Q2 2017 | Q1 2018 | 4 |
| Jefferies Group LLC | 1 | 1 | 0.01% | 0.01% | 0.02% | Q2 2017 | Q4 2018 | 3 |
| Magnetar Financial LLC | 3 | 3 | 0.01% | 0.02% | 0.02% | Q2 2017 | Q4 2017 | 3 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 3 | 3 | 1.05% | 2.06% | 2.76% | Q1 2020 | Q3 2020 | 3 |
| Mohican Financial Management, LLC | 3 | 3 | 2.50% | 2.93% | 3.41% | Q2 2017 | Q4 2017 | 3 |
| Kamunting Street Capital Management, L.P. | 3 | 3 | 1.53% | 1.66% | 1.91% | Q2 2017 | Q4 2017 | 3 |
| Opti Capital Management, LP | 2 | 1 | 0.44% | 2.38% | 5.89% | Q4 2018 | Q4 2019 | 3 |
| ANGELO GORDON & CO., L.P. | 3 | 3 | 1.96% | 3.50% | 4.35% | Q1 2020 | Q3 2020 | 3 |
| QVT Financial LP | 2 | 2 | 0.28% | 0.33% | 0.37% | Q2 2017 | Q3 2017 | 2 |
| Context Partners Fund, L.P. | 1 | 1 | 2.74% | 4.04% | 5.34% | Q3 2018 | Q3 2020 | 2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 2 | 2 | 0.00% | 0.00% | 0.00% | Q2 2017 | Q3 2017 | 2 |
| Madison Avenue Partners, LP | 2 | 2 | 1.09% | 1.22% | 1.34% | Q1 2020 | Q2 2020 | 2 |
| Daiwa Securities Group Inc. | 2 | 2 | 0.00% | 0.01% | 0.01% | Q1 2019 | Q2 2019 | 2 |
| Empyrean Capital Partners, LP | 2 | 2 | 0.10% | 0.16% | 0.21% | Q4 2018 | Q1 2019 | 2 |
| MILLENNIUM MANAGEMENT LLC | 2 | 2 | 0.00% | 0.00% | 0.01% | Q1 2018 | Q2 2018 | 2 |
| D. E. Shaw & Co., Inc. | 2 | 2 | 0.01% | 0.01% | 0.01% | Q3 2017 | Q4 2017 | 2 |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 2 | 2 | 0.71% | 0.78% | 0.86% | Q3 2017 | Q4 2017 | 2 |
| JANE STREET GROUP, LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q2 2017 | Q1 2018 | 2 |
| NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC | 1 | 1 | 0.01% | 0.01% | 0.01% | Q2 2017 | Q2 2017 | 1 |
| Shaolin Capital Management LLC | 1 | 1 | 0.80% | 0.80% | 0.80% | Q1 2019 | Q1 2019 | 1 |
| Verition Fund Management LLC | 1 | 1 | 0.57% | 0.57% | 0.57% | Q1 2018 | Q1 2018 | 1 |
| Verde Servicos Internacionais S.A. | 1 | 1 | 1.05% | 1.05% | 1.05% | Q2 2017 | Q2 2017 | 1 |
| Russell Investments Group, Ltd. | 1 | 1 | 0.00% | 0.00% | 0.00% | Q1 2018 | Q1 2018 | 1 |
| BlueCrest Capital Management Ltd | 1 | 1 | 0.25% | 0.25% | 0.25% | Q2 2017 | Q2 2017 | 1 |
| GEODE CAPITAL MANAGEMENT, LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q1 2018 | Q1 2018 | 1 |
| PT ASSET MANAGEMENT, LLC | 1 | 1 | 2.33% | 2.33% | 2.33% | Q4 2017 | Q4 2017 | 1 |
This page lists all the filers that currently own AMAG PHARMACEUTICALS INC or have owned AMAG PHARMACEUTICALS INC in the past.