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The market watches companies.We watch the people behind them.

Every leader gets a yearly reading from their birth date: Strong, Firm, Even, Soft or Weak. Since 1995, Strong years have risen 77.8% of the time, Weak years 53.3%.

Explore a companySee the record

Experimental research platform. Not investment advice.

Warren Buffett · BRK-B

The fingerprint: one ridge per year in the role, 1996 at the core to 2025 at the edge. Heavier ridge, stronger reading. Solid: the stock rose that year. Dashed: it fell. The faint outer ridges only finish the outline. Scroll, and the chart below is read off the print.

2026: who reads Strong, who reads Weak.

Of the 100 leaders in role with a reading for 2026, 6 read Strong and 9 Weak. The year scores them on 31 December.

Months settled
10 of 12
Field median
+3.2%
S&P 500
+11.7%
Readings
Read in October 2026, a trial run

All 100 on the 2026 board

Strong6 leaders · 4 of 6 up so far, 4 above the field

Since 1995, 3 in 4 Strong years rose (77.8%).

  1. Aaron LevieBOX2 signals, 0 drags
    +45.3%above the field
  2. Mike Cannon-BrookesTEAM2 signals, 0 drags
    +18.2%above the field
  3. Satya NadellaMSFT2 signals, 0 drags
    +8.6%above the field
  4. Ted PickMS2 signals, 0 drags
    +6.2%above the field
  5. Brian MoynihanBAC2 signals, 0 drags
    −7.6%below
  6. Amnon ShashuaMBLY3 signals, 0 drags
    −42.9%below

Weak9 leaders · 2 of 9 up so far, 2 above the field

Since 1995, 11 in 20 Weak years rose (53.3%).

  1. Alan TreflerPEGA0 signals, 1 drag
    −42.9%below
  2. Robin LiBIDU0 signals, 1 drag
    −41.5%below
  3. Nick WoodmanGPRO0 signals, 2 drags
    −34.0%below
  4. Bill McDermottNOW0 signals, 1 drag
    −31.4%below
  5. Richard D. FairbankCOF0 signals, 1 drag
    −14.5%below
  6. Brian L. RobertsCMCSA0 signals, 1 drag
    −12.7%below
  7. B. Francis Saul IIBFS0 signals, 2 drags
    −0.8%below
  8. Jensen HuangNVDA0 signals, 1 drag
    +10.0%above the field
  9. Whitney Wolfe HerdBMBL0 signals, 1 drag
    +67.8%above the field

The return beside each name is the stock's year so far, January to October; above or below is against the median of every leader's stock this year. Not investment advice.

One leader, year by year.

Company
BRK-B, Berkshire Hathaway
Founder
Warren Buffett, since May 1965
2026
No reading
In the role
BRK-B rose in 24 of 30 years
Strong and Firm years
10 of 10 rose
Soft and Weak years
2 of 6 rose

Heavier years, lighter years, and what the stock did.

Every year on Warren Buffett's page

Year
2025
Reading
Even · 0 signals, 0 drags
Stock that year
+10.9%
Reading only×10StrongFirmEvenSoftWeakStrong 2000Strong 2001Strong 2010Strong 2014Strong 2016Weak 1999Weak 2002Weak 2011Weak 2023Trading data begins200020052010201520202025
  • Warren Buffett's yearly reading (right axis)
  • BRK-B share growth, log scale (left axis)
  • Strong year
  • Weak year

The record, 1995–2025.

Every year a leader ran the company from 1995 to 2025, read with the rules now fixed and scored against the stock's calendar-year return: 226 leaders, 2,580 leader-years.

of Strong years rose, 194 years
77.8%of Strong years rose, 194 years
of Weak years rose, 135 years
53.3%of Weak years rose, 135 years
points between Strong and Weak when every year is re-read from the recorded birth dates, and when every birth date is moved one day
25 → 4points between Strong and Weak when every year is re-read from the recorded birth dates, and when every birth date is moved one day

Re-read from the recorded birth dates, Strong and Weak sit 25 points apart. Move every birth date one day, earlier or later, and re-read every year: 4 points. Read the same years against another leader's chart: 6. How we checked it

ReadingLeader-yearsRoseBeat the S&P 500Beat the field
Strong19477.8%64.4%60.8%
Firm54269.4%54.1%51.7%
Even1,48167.0%52.3%49.4%
Soft22853.5%46.1%43.0%
Weak13553.3%43.7%41.5%

Rose: the year's return was above zero. Beat the S&P 500: above the index's return for the same year. Beat the field: above the median return of the leaders in role that year. The rules were set first and tested on these years; the first season read before it began is 2027.

How a reading is made

Method · write-up in progress

  1. Start from the birth date

    A birth date becomes a cycle of years, and rules of our own read each year of it. No birth times: a reading is issued only when it holds whichever hour the leader was born.

  2. Five levels

    Signals and drags stack into Strong, Firm, Even, Soft or Weak. The count is shown with every reading; the kinds stay with us.

  3. Score it against the stock

    Calendar year, January to December. Did the stock rise? Did it beat the other leaders' stocks that year? Every year since 1995, hits and misses alike.