EcoR1 Capital, LLC

357 TEHAMA STREET #3 SAN FRANCISCO, CA 94103

Holdings MV

2.15B

Last Updated

2026-03-09

Total Holdings

Tracker Performance

EcoR1 Capital, LLC

S&P 500

Total Return

+70.43%

Annualized Return

+117.40%

1 Day Change

-1.87%

Sharpe Ratio

1.95

Trade Updates

2026-03-09

Ticker

Name

03/09

Sell

18.41%

Fill Price --

17.79%

Ticker

Name

03/09

Sell

0.82%

Fill Price --

0.79%

Ticker

Name

03/09

Buy

1.61%

Fill Price --

1.65%

Ticker

Name

03/09

Sell

1.55%

Fill Price --

1.49%

Ticker

Name

03/09

Buy

3.58%

Fill Price --

3.63%

Ticker

Name

03/09

Buy

8.81%

Fill Price --

9.29%

Ticker

Name

03/09

Buy

3.17%

Fill Price --

3.39%

Ticker

Name

03/09

Buy

1.50%

Fill Price --

1.59%

Ticker

Name

03/09

Buy

2.47%

Fill Price --

2.54%

Ticker

Name

03/09

Buy

1.03%

Fill Price --

1.09%

Ticker

Name

03/09

Buy

2.67%

Fill Price --

2.85%

Ticker

Name

03/09

Buy

12.91%

Fill Price --

13.50%

Ticker

Name

03/09

Buy

2.95%

Fill Price --

3.12%

Ticker

Name

03/09

Buy

2.53%

Fill Price --

2.56%

Ticker

Name

03/09

Buy

0.90%

Fill Price --

0.96%

Ticker

Name

03/09

Buy

0.69%

Fill Price --

0.73%

Ticker

Name

03/09

Buy

2.09%

Fill Price --

2.32%

Ticker

Name

03/09

Buy

1.30%

Fill Price --

1.33%

Ticker

Name

03/09

Sell

29.72%

Fill Price --

28.16%

Current Holdings

EcoR1 Capital, LLC maintains a prominent position in the Medical Biology sector (108.74%), which serves as the cornerstone of the portfolio. The remaining capital is allocated across other industries and other industries, balancing sector-specific growth potential with risk management.

Medical Biology

108.74%

Symbol

P&L %

Position Size

Ticker

Name

+114.04%

2.85%

Ticker

Name

+98.25%

17.79%

Ticker

Name

+85.83%

3.12%

Ticker

Name

+37.29%

28.16%

Ticker

Name

+35.19%

13.50%

Ticker

Name

+33.18%

2.32%

Ticker

Name

+18.50%

2.56%

Ticker

Name

+17.27%

3.39%

Ticker

Name

+13.04%

0.73%

Ticker

Name

+12.15%

1.59%

Ticker

Name

+9.51%

9.29%

Ticker

Name

+8.21%

0.79%

Ticker

Name

+6.40%

3.63%

Ticker

Name

+6.36%

1.49%

Ticker

Name

+0.47%

0.96%

Ticker

Name

-2.96%

1.33%

Ticker

Name

-3.44%

1.29%

Ticker

Name

-10.91%

2.54%

Ticker

Name

-14.02%

1.09%

Ticker

Name

-16.44%

1.65%

Disclaimer

This simulated portfolio Tracker is based on holdings disclosed in institutional 13F filings. We select the top 20 holdings and construct a portfolio weighted by their relative proportions. Holdings beyond the top 20 are excluded, as their impact on the portfolio is minimal. Focusing on the top 20 enhances practicality and reflects the institution's stock-picking ability. The portfolio is periodically rebalanced to align with updated 13F filings. Note that 13F disclosures typically have a 45-day delay (e.g., Q2 2025 data is disclosed by mid-August). Users should consider this lag when tracking the portfolio, though institutional holdings are generally long-term, emphasizing strategic rationale behind changes. This portfolio is for illustrative purposes only and does not constitute investment advice. All investment decisions are the user's responsibility. Investing involves risks, including potential loss of principal. Past performance is not indicative of future results.

Frequently Asked Questions

How many stocks does EcoR1 Capital, LLC currently hold?

As of the latest update on 2026-03-09, the EcoR1 Capital, LLC portfolio consists of 20 individual holdings. The portfolio is actively managed to optimize strategy performance.

How has EcoR1 Capital, LLC's portfolio performed recently?

Over the recent period, EcoR1 Capital, LLC has demonstrated significant growth. The portfolio currently shows a Total Return of +70.43%, with an Annualized Return of +117.40%, outperforming standard market benchmarks.

What is the total portfolio value (AUM) of EcoR1 Capital, LLC?

The current market value of EcoR1 Capital, LLC's disclosed holdings is approximately $2.15B. This figure reflects the value of assets tracked based on their latest filing.