Main Street Research LLC

30 LIBERTY SHIP WAY, SUITE 3330 SAUSALITO, CA 94965

Holdings MV

1.24B

Last Updated

2026-02-23

Total Holdings

Tracker Performance

Main Street Research LLC

S&P 500

Total Return

+13.76%

Annualized Return

+17.09%

1 Day Change

-1.43%

Sharpe Ratio

0.73

Trade Updates

2026-02-23

Ticker

Name

02/23

Sell

7.06%

Fill Price --

6.36%

Ticker

Name

02/23

Buy

4.25%

Fill Price --

4.84%

Ticker

Name

02/23

Sell

3.58%

Fill Price --

3.21%

Ticker

Name

02/23

Sell

4.67%

Fill Price --

3.46%

Ticker

Name

02/23

Buy

5.59%

Fill Price --

5.72%

Ticker

Name

02/23

Sell

3.42%

Fill Price --

3.41%

Ticker

Name

02/23

Sell

3.97%

Fill Price --

0.00%

Ticker

Name

02/23

Sell

4.88%

Fill Price --

4.33%

Ticker

Name

02/23

Buy

7.64%

Fill Price --

8.01%

Ticker

Name

02/23

Buy

3.62%

Fill Price --

4.85%

Ticker

Name

02/23

Buy

0.00%

Fill Price --

2.99%

Ticker

Name

02/23

Buy

5.52%

Fill Price --

5.74%

Ticker

Name

02/23

Sell

5.09%

Fill Price --

4.46%

Ticker

Name

02/23

Buy

4.54%

Fill Price --

4.60%

Ticker

Name

02/23

Buy

5.47%

Fill Price --

6.54%

Ticker

Name

02/23

Sell

9.34%

Fill Price --

8.95%

Ticker

Name

02/23

Buy

4.90%

Fill Price --

6.30%

Ticker

Name

02/23

Sell

6.18%

Fill Price --

5.34%

Ticker

Name

02/23

Buy

2.63%

Fill Price --

2.94%

Ticker

Name

02/23

Buy

4.37%

Fill Price --

4.91%

Ticker

Name

02/23

Sell

3.28%

Fill Price --

3.04%

Current Holdings

Main Street Research LLC maintains a prominent position in the Electronics sector (36.85%), which serves as the cornerstone of the portfolio. The remaining capital is allocated across Computer and other industries, balancing sector-specific growth potential with risk management.

Electronics

36.85%

Computer

22.55%

Commerce

12.72%

Internet & Media

12.66%

Non-Bank Financials

10.23%

Banks

8.72%

Medical Biology

6.34%

Utilities

0.00%

Manufacturing

0.00%

Communication Equipment

0.00%

Symbol

P&L %

Position Size

Ticker

Name

+107.92%

8.09%

Ticker

Name

+62.74%

6.59%

Ticker

Name

+62.09%

3.21%

Ticker

Name

+34.96%

8.84%

Ticker

Name

+34.44%

6.66%

Ticker

Name

+31.41%

6.02%

Ticker

Name

+27.22%

2.96%

Ticker

Name

+19.36%

5.03%

Ticker

Name

+14.96%

5.58%

Ticker

Name

+14.00%

3.74%

Ticker

Name

+13.34%

3.12%

Ticker

Name

+12.66%

3.01%

Ticker

Name

+12.58%

5.53%

Ticker

Name

+7.02%

5.71%

Ticker

Name

+2.30%

4.18%

Ticker

Name

-3.19%

4.57%

Ticker

Name

-7.44%

2.60%

Ticker

Name

-9.73%

6.83%

Ticker

Name

-11.01%

4.70%

Ticker

Name

-17.89%

3.04%

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 Main Street Research LLC currently hold?

As of the latest update on 2026-02-23, the Main Street Research LLC portfolio consists of 20 individual holdings. The portfolio is actively managed to optimize strategy performance.

How has Main Street Research LLC's portfolio performed recently?

Over the recent period, Main Street Research LLC has demonstrated significant growth. The portfolio currently shows a Total Return of +13.76%, with an Annualized Return of +17.09%, outperforming standard market benchmarks.

What is the total portfolio value (AUM) of Main Street Research LLC?

The current market value of Main Street Research LLC's disclosed holdings is approximately $1.24B. This figure reflects the value of assets tracked based on their latest filing.