Insider buying leaderboard.
The company insiders buying their own stock the most — ranked by number of open-market BUYs reported to the SEC on Form 4 over the last 90 days.
How to read this: this ranks insiders by how much they’ve been buying — trading activity, not investment skill or realized returns. A high rank is not a track record and not a signal to follow anyone’s trades.
| # | Insider | Role | Buys | Companies | Most bought | Total value | Latest |
|---|---|---|---|---|---|---|---|
| 1 | Conifer Management, L.L.C. | 10% Owner | 104 | 1 | GPI | $187,264,818 | Sep 30, 2026 |
| 2 | Cascade Investment, L.L.C. | 10% Owner | 86 | 1 | RSG | $1,380,322,194 | Sep 11, 2026 |
| 3 | Horizon Kinetics Asset Management LLC | 10% Owner | 47 | 1 | TPL | $18,317 | Sep 29, 2026 |
| 4 | Berkshire Hathaway Inc | 10% Owner | 45 | 1 | LEN | $595,294,962 | Oct 2, 2026 |
| 5 | Kenneth S. Courtis | Director | 25 | 1 | AMR | $10,546,063 | Sep 8, 2026 |
| 6 | Nippon Life Insurance Co | 10% Owner | 20 | 1 | CRBG | $151,811,519 | Oct 1, 2026 |
| 7 | Ernest S. Rady | Director & Officer | 18 | 1 | AAT | $20,059,591 | Sep 14, 2026 |
| 8 | Jack E. Corrigan | Director | 14 | 1 | AMH | $442,055 | Sep 11, 2026 |
| 9 | Bank of America Corp | 10% Owner | 13 | 1 | BAC | $79,523 | Aug 18, 2026 |
| 10 | Durable Capital Partners LP | 10% Owner | 10 | 1 | GSHD | $18,447,168 | Sep 22, 2026 |
| 11 | Bor-Zen Tien | VP | 10 | 1 | TSM | $157,861 | Oct 7, 2026 |
| 12 | Aqua Capital, Ltd. | 10% Owner | 9 | 1 | ENR | $3,718,956 | Jul 24, 2026 |
| 13 | Ryan Cohen | Director & Officer | 7 | 1 | GME | $97,192,416 | Oct 13, 2026 |
| 14 | Jonathan D. Rolph | Director | 7 | 1 | EVRG | $133,611 | Sep 11, 2026 |
| 15 | Lester B. Knight | Director | 6 | 1 | AON | $6,549,688 | Sep 2, 2026 |
| 16 | Joseph Wm Foran | Director & Officer | 6 | 1 | MTDR | $1,026,894 | Aug 26, 2026 |
| 17 | Robert Thomas Devincenzi | Director | 6 | 1 | UTI | $334,697 | Sep 28, 2026 |
| 18 | Lipen Yuan | VP | 6 | 1 | TSM | $183,402 | Oct 7, 2026 |
| 19 | Dan H. Wilks | 10% Owner | 5 | 1 | ACDC | $6,484,290 | Aug 25, 2026 |
| 20 | Paul P. Rusnak | 10% Owner | 5 | 1 | SAH | $4,584,694 | Oct 14, 2026 |
| 21 | J. Michael Nauman | Director | 5 | 1 | MATW | $130,932 | Sep 11, 2026 |
| 22 | Srinivas Akkaraju | Director | 4 | 1 | ALMS | $10,726,255 | Sep 8, 2026 |
| 23 | John Rakolta Jr. | Director | 4 | 2 | ADC-PA | $3,574,399 | Sep 16, 2026 |
| 24 | Andrew Gundlach | Director | 4 | 1 | WELL | $2,407,650 | Aug 26, 2026 |
| 25 | Richard Beckwitt | Director | 4 | 1 | DFH | $1,385,440 | Sep 10, 2026 |
| 26 | Len Sturm | Director | 4 | 1 | DFH | $42,315 | Sep 3, 2026 |
| 27 | THRC Holdings, LP | 10% Owner | 3 | 1 | ACDC | $2,867,649 | Aug 25, 2026 |
| 28 | Lawrence Erik Kurzius | Director | 3 | 2 | COO | $2,024,390 | Sep 16, 2026 |
| 29 | Jesse G. Singh | Director & Officer | 3 | 1 | FBIN | $2,015,342 | Aug 7, 2026 |
| 30 | James A. Burke | Director & Officer | 3 | 1 | VST | $1,173,069 | Sep 1, 2026 |
| 31 | Joseph Leo Binz | Director | 3 | 1 | DFIN | $999,990 | Sep 2, 2026 |
| 32 | Mark S. Peek | Director | 3 | 1 | MBGL | $980,566 | Aug 13, 2026 |
| 33 | William J. Colombo | Director | 3 | 1 | DKS | $907,102 | Sep 1, 2026 |
| 34 | Adriana Cisneros | Director | 3 | 1 | ASTS | $619,200 | Aug 31, 2026 |
| 35 | Sean O. Mahoney | Director | 3 | 1 | APTV | $552,683 | Aug 11, 2026 |
| 36 | Thomas J. Smach | Director | 3 | 1 | CROX | $513,343 | Sep 15, 2026 |
| 37 | Michael J. O'Sullivan | Officer (see filing) | 3 | 1 | BRK-B | $250,072 | Aug 12, 2026 |
| 38 | Oliver Engert | Chief Administrative Officer | 3 | 1 | ENOV | $199,979 | Sep 4, 2026 |
| 39 | Michael C. Bucella | Director | 3 | 1 | WULF | $189,916 | Sep 15, 2026 |
| 40 | David C. Habiger | Director | 3 | 1 | BSX | $156,823 | Aug 5, 2026 |
| 41 | William C. Green | Director | 3 | 1 | ABR-PD | $131,591 | Aug 31, 2026 |
| 42 | C. Bradford Richmond | Director | 3 | 1 | BJRI | $107,902 | Sep 3, 2026 |
| 43 | Chuck Kyrish | SVP & CFO | 3 | 1 | CE | $104,698 | Aug 14, 2026 |
| 44 | Douglas N. Benham | Director | 3 | 1 | AMH | $92,555 | Aug 12, 2026 |
| 45 | Ruth Porat | Director | 3 | 1 | BX | $62,445 | Aug 10, 2026 |
| 46 | Che-Chia Wei | Director & Officer | 3 | 1 | TSM | $33,929 | Oct 7, 2026 |
| 47 | Yuh-Jier Mii | EVP and Co-COO | 3 | 1 | TSM | $16,087 | Oct 7, 2026 |
| 48 | Yung-Pei Chin | EVP and Co-COO | 3 | 1 | TSM | $16,008 | Oct 7, 2026 |
| 49 | Yung-Chin Hou | SVP and Deputy Co-COO | 3 | 1 | TSM | $14,030 | Oct 7, 2026 |
| 50 | Kevin Xiaoqiang Zhang | SVP and Deputy Co-COO | 3 | 1 | TSM | $13,951 | Oct 7, 2026 |
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Tradune watches SEC Form 4 filings and flags insider-cluster buying across everything you hold, routed to you automatically. Free for everyone right now · no card · nothing to buy
Track insider filings free →Ranking is by insider trading activity (number of buys) from public SEC Form 4 filings over roughly the last 90 days — not by realized returns, performance or skill, which this does not measure. Not a recommendation to follow any insider’s trades.
This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.