# ARCA BIOPHARMA INC (ABIOXXXX)

> Institutional ownership reported to the SEC as of Q1 2019, from Form 13F filings. Source: https://holderbook.com/stocks/ABIOXXXX/

- Reporting holders: 11
- Reported value: $863.0K
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [RENAISSANCE TECHNOLOGIES LLC](https://holderbook.com/funds/1037389-renaissance-technologies-llc/) | $337.0K | 901,611 | 0.0% | 2 |
| [Tekla Capital Management LLC](https://holderbook.com/funds/1300336-tekla-capital-management-llc/) | $303.0K | 811,227 | 0.0% | 2 |
| [ACADIAN ASSET MANAGEMENT LLC](https://holderbook.com/funds/916542-acadian-asset-management-llc/) | $82.0K | 219,236 | 0.0% | 2 |
| [Aveo Capital Partners, LLC](https://holderbook.com/funds/1576584-aveo-capital-partners-llc/) | $35.0K | 93,258 | 0.0% | 2 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $31.0K | 81,938 | 0.0% | 1 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $27.0K | 72,890 | 0.0% | 1 |
| [VANGUARD GROUP INC](https://holderbook.com/funds/102909-vanguard-group-inc/) | $19.0K | 50,481 | 0.0% | 2 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $18.0K | 48,679 | 0.0% | 2 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $5.0K | 13,971 | 0.0% | 2 |
| [TWO SIGMA SECURITIES, LLC](https://holderbook.com/funds/1450144-two-sigma-securities-llc/) | $5.0K | 12,428 | 0.0% | 1 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $1.0K | 2,000 | 0.0% | 4 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q1 2019 | 11 | $863.0K |
| Q4 2018 | 10 | $710.0K |