# ZAFGEN INC (ZFGN)

> Institutional ownership reported to the SEC as of Q1 2020, from Form 13F filings. Source: https://holderbook.com/stocks/ZFGN/

- Reporting holders: 40
- Reported value: $20.2M
- 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 |
|---|---|---|---|---|
| [Atlas Venture Advisors, Inc.](https://holderbook.com/funds/1767432-atlas-venture-advisors-inc/) | $2.7M | 3,506,207 | 3.7% | 6 |
| [SPHERA FUNDS MANAGEMENT LTD.](https://holderbook.com/funds/1496201-sphera-funds-management-ltd/) | $2.4M | 3,161,562 | 0.3% | 2 |
| [683 Capital Management, LLC](https://holderbook.com/funds/1404574-683-capital-management-llc/) | $2.0M | 2,630,368 | 0.2% | 6 |
| [Sio Capital Management, LLC](https://holderbook.com/funds/1482416-sio-capital-management-llc/) | $1.8M | 2,332,164 | 0.6% | 2 |
| [RENAISSANCE TECHNOLOGIES LLC](https://holderbook.com/funds/1037389-renaissance-technologies-llc/) | $1.7M | 2,160,550 | 0.0% | 6 |
| [MANGROVE PARTNERS](https://holderbook.com/funds/1535392-mangrove-partners/) | $1.4M | 1,762,826 | 0.2% | 6 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $1.3M | 1,694,701 | 0.0% | 10 |
| [ACUTA CAPITAL PARTNERS, LLC](https://holderbook.com/funds/1582844-acuta-capital-partners-llc/) | $1.1M | 1,386,000 | 0.5% | 2 |
| [Soleus Capital Management, L.P.](https://holderbook.com/funds/1802630-soleus-capital-management-l-p/) | $1.0M | 1,348,399 | 1.2% | 2 |
| [ORBIMED ADVISORS LLC](https://holderbook.com/funds/1055951-orbimed-advisors-llc/) | $852.0K | 1,106,529 | 0.0% | 2 |
| [VANGUARD GROUP INC](https://holderbook.com/funds/102909-vanguard-group-inc/) | $764.0K | 992,463 | 0.0% | 6 |
| [BlackRock Inc.](https://holderbook.com/funds/1364742-blackrock-inc/) | $563.0K | 731,957 | 0.0% | 6 |
| [Worth Venture Partners, LLC](https://holderbook.com/funds/1696778-worth-venture-partners-llc/) | $550.0K | 713,621 | 0.3% | 4 |
| [ROYCE & ASSOCIATES LP](https://holderbook.com/funds/906304-royce-associates-lp/) | $259.0K | 336,781 | 0.0% | 6 |
| [MILLENNIUM MANAGEMENT LLC](https://holderbook.com/funds/1273087-millennium-management-llc/) | $237.0K | 307,901 | 0.0% | 6 |
| [DAFNA Capital Management LLC](https://holderbook.com/funds/1389933-dafna-capital-management-llc/) | $235.0K | 305,500 | 0.1% | 6 |
| [Russell Investments Group, Ltd.](https://holderbook.com/funds/1692234-russell-investments-group-ltd/) | $201.0K | 261,234 | 0.0% | 3 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $194.0K | 252,782 | 0.0% | 6 |
| [TWO SIGMA INVESTMENTS, LP](https://holderbook.com/funds/1179392-two-sigma-investments-lp/) | $172.0K | 223,368 | 0.0% | 6 |
| [TWO SIGMA ADVISERS, LP](https://holderbook.com/funds/1478735-two-sigma-advisers-lp/) | $165.0K | 214,300 | 0.0% | 6 |
| [Point72 Asset Management, L.P.](https://holderbook.com/funds/1603466-point72-asset-management-l-p/) | $159.0K | 207,129 | 0.0% | 2 |
| [WINTON GROUP Ltd](https://holderbook.com/funds/1612063-winton-group-ltd/) | $140.0K | 182,452 | 0.0% | 3 |
| [Hikari Power Ltd](https://holderbook.com/funds/1606152-hikari-power-ltd/) | $116.0K | 150,000 | 0.0% | 6 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $61.0K | 78,651 | 0.0% | 6 |
| [BRIDGEWAY CAPITAL MANAGEMENT INC](https://holderbook.com/funds/1107261-bridgeway-capital-management-inc/) | $35.0K | 45,000 | 0.0% | 1 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q1 2020 | 40 | $20.2M |
| Q4 2019 | 45 | $28.0M |
| Q3 2019 | 46 | $17.0M |
| Q2 2019 | 66 | $31.5M |
| Q1 2019 | 85 | $78.6M |
| Q4 2018 | 93 | $155.3M |