Begor Mark W
Director · Officer · EFX, RJF, NATL
As of 2026-09-16, Begor Mark W has 80 Form 4 transactions on record across 3 companies — 53 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in July in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-24 | EFX | Sale | 21,543 @ $172.00 | $3.7M | −7.3% of holding | 271,890 | Form 4 |
| 2026-07-24 | EFX | Sale | 6,200 @ $171.26 | $1.1M | −2.1% of holding | 293,433 | Form 4 |
| 2026-07-24 | EFX | Sale | 4,112 @ $172.79 | $711K | −1.4% of holding | 299,633 | Form 4 |
| 2026-07-24 | EFX | Sale | 2,936 @ $173.79 | $510K | −1.0% of holding | 303,745 | Form 4 |
| 2026-07-24 | EFX | Sale | 1,300 @ $174.91 | $227K | −0.4% of holding | 306,681 | Form 4 |
| 2026-07-24 | EFX | Sale | 600 @ $169.86 | $102K | −0.2% of holding | 308,581 | Form 4 |
| 2026-07-24 | EFX | Sale | 600 @ $168.47 | $101K | −0.2% of holding | 307,981 | Form 4 |
| 2026-07-24 | EFX | Sale | 500 @ $175.85 | $88K | −0.2% of holding | 309,181 | Form 4 |
| 2026-04-24 | EFX | Sale | 20,471 @ $172.46 | $3.5M | −7.0% of holding | 271,730 | Form 4 |
| 2026-04-24 | EFX | Sale | 10,944 @ $171.57 | $1.9M | −3.6% of holding | 292,201 | Form 4 |
| 2026-04-24 | EFX | Sale | 4,659 @ $173.39 | $808K | −1.5% of holding | 303,145 | Form 4 |
| 2026-04-24 | EFX | Sale | 1,717 @ $174.32 | $299K | −0.6% of holding | 307,804 | Form 4 |
| 2026-02-10 | EFX | Sale | 18,352 @ $202.15 | $3.7M | −7.4% of holding | 230,506 | Form 4 |
| 2026-02-10 | EFX | Sale | 11,000 @ $203.08 | $2.2M | −4.2% of holding | 248,858 | Form 4 |
| 2026-02-10 | EFX | Sale | 4,057 @ $201.26 | $817K | −1.5% of holding | 259,858 | Form 4 |
| 2026-02-10 | EFX | Sale | 1,772 @ $200.03 | $354K | −0.7% of holding | 263,915 | Form 4 |
| 2026-02-10 | EFX | Sale | 829 @ $199.00 | $165K | −0.3% of holding | 267,446 | Form 4 |
| 2026-02-10 | EFX | Sale | 445 @ $196.43 | $87K | −0.2% of holding | 268,275 | Form 4 |
| 2026-02-10 | EFX | Sale | 364 @ $195.40 | $71K | −0.1% of holding | 268,720 | Form 4 |
| 2026-02-10 | EFX | Sale | 331 @ $194.22 | $64K | −0.1% of holding | 269,084 | Form 4 |
| 2026-02-10 | EFX | Sale | 227 @ $192.89 | $44K | −0.1% of holding | 269,415 | Form 4 |
| 2026-02-10 | EFX | Sale | 213 @ $203.76 | $43K | −0.1% of holding | 269,642 | Form 4 |
| 2026-02-10 | EFX | Sale | 201 @ $197.79 | $40K | −0.1% of holding | 269,855 | Form 4 |
| 2025-10-27 | EFX | Sale | 6,943 @ $232.19 | $1.6M | −4.6% of holding | 142,934 | Form 4 |
| 2025-10-27 | EFX | Sale | 6,639 @ $230.18 | $1.5M | −4.2% of holding | 149,877 | Form 4 |
| 2025-10-27 | EFX | Sale | 6,227 @ $229.20 | $1.4M | −3.8% of holding | 156,516 | Form 4 |
| 2025-10-27 | EFX | Sale | 5,872 @ $230.16 | $1.4M | −21.0% of holding | 22,045 | Form 4 |
| 2025-10-27 | EFX | Sale | 5,274 @ $232.27 | $1.2M | −15.9% of holding | 27,917 | Form 4 |
| 2025-10-27 | EFX | Sale | 4,015 @ $233.01 | $936K | −2.4% of holding | 162,743 | Form 4 |
| 2025-10-27 | EFX | Sale | 3,995 @ $229.12 | $915K | −10.7% of holding | 33,191 | Form 4 |
| 2025-10-27 | EFX | Sale | 3,757 @ $231.46 | $870K | −2.2% of holding | 166,758 | Form 4 |
| 2025-10-27 | EFX | Sale | 3,331 @ $231.59 | $771K | −8.2% of holding | 37,186 | Form 4 |
| 2025-10-27 | EFX | Sale | 2,801 @ $233.12 | $653K | −6.5% of holding | 40,517 | Form 4 |
| 2025-10-27 | EFX | Sale | 204 @ $235.22 | $48K | −0.1% of holding | 170,515 | Form 4 |
| 2025-10-27 | EFX | Sale | 174 @ $233.88 | $41K | −0.1% of holding | 170,719 | Form 4 |
| 2025-10-27 | EFX | Sale | 76 @ $234.93 | $18K | −0.2% of holding | 43,318 | Form 4 |
| 2025-10-27 | EFX | Sale | 37 @ $233.95 | $9K | −0.1% of holding | 43,394 | Form 4 |
| 2025-07-28 | EFX | Sale | 19,841 @ $240.95 | $4.8M | −12.2% of holding | 142,872 | Form 4 |
| 2025-07-28 | EFX | Sale | 17,731 @ $241.87 | $4.3M | −9.8% of holding | 162,713 | Form 4 |
| 2025-07-28 | EFX | Sale | 9,497 @ $242.70 | $2.3M | −5.0% of holding | 180,444 | Form 4 |
| 2025-07-28 | EFX | Sale | 831 @ $243.90 | $203K | −0.4% of holding | 189,941 | Form 4 |
| 2025-07-28 | EFX | Sale | 364 @ $244.95 | $89K | −0.2% of holding | 190,772 | Form 4 |
| 2025-04-28 | EFX | Sale | 22,160 @ $256.61 | $5.7M | −13.5% of holding | 142,395 | Form 4 |
| 2025-02-13 | EFX | Sale | 7,151 @ $251.60 | $1.8M | −4.8% of holding | 142,243 | Form 4 |
| 2025-02-13 | EFX | Sale | 6,199 @ $250.74 | $1.6M | −4.0% of holding | 149,394 | Form 4 |
| 2025-02-13 | EFX | Sale | 5,214 @ $255.27 | $1.3M | −3.2% of holding | 155,593 | Form 4 |
| 2025-02-13 | EFX | Sale | 1,600 @ $252.38 | $404K | −1.0% of holding | 160,807 | Form 4 |
| 2025-02-13 | EFX | Sale | 1,402 @ $256.31 | $359K | −0.9% of holding | 162,407 | Form 4 |
| 2025-02-13 | EFX | Sale | 595 @ $253.60 | $151K | −0.4% of holding | 163,809 | Form 4 |
31 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-07-24 | EFX | Option exercise | 37,791 | 309,681 | Form 4 |
| 2026-07-24 | EFX | Option exercise | 37,791 | 37,792 | Form 4 |
| 2026-04-24 | EFX | Option exercise | 37,791 | 309,521 | Form 4 |
| 2026-04-24 | EFX | Option exercise | 37,791 | 75,583 | Form 4 |
| 2026-02-25 | EFX | Award / grant | 40,955 | 271,461 | Form 4 |
| 2026-02-19 | RJF | Award / grant | 1,303 | 2,285 | Form 4 |
| 2026-02-10 | EFX | Option exercise | 37,791 | 236,778 | Form 4 |
| 2026-02-10 | EFX | Withheld for tax | 1,759 | 265,687 | Form 4 |
| 2026-02-10 | EFX | Award / grant | 33,278 | 270,056 | Form 4 |
| 2026-02-10 | EFX | Option exercise | 37,791 | 113,374 | Form 4 |
| 2026-02-03 | EFX | Withheld for tax | 2,405 | 198,987 | Form 4 |
| 2026-02-03 | EFX | Award / grant | 59,123 | 201,392 | Form 4 |
| 2025-12-31 | EFX | Withheld for tax | 997 | 142,091 | Form 4 |
| 2025-10-27 | EFX | Option exercise | 27,959 | 170,940 | Form 4 |
| 2025-10-27 | EFX | Option exercise | 27,959 | 0 | Form 4 |
| 2025-10-27 | EFX | Gift | 47 | 170,893 | Form 4 |
| 2025-07-28 | EFX | Option exercise | 27,960 | 191,136 | Form 4 |
| 2025-07-28 | EFX | Option exercise | 27,960 | 27,959 | Form 4 |
| 2025-05-21 | NATL | Option exercise | 2,690 | 31,475 | Form 4 |
| 2025-05-21 | RJF | Award / grant | 982 | 982 | Form 4 |
| 2025-04-28 | EFX | Option exercise | 22,160 | 164,555 | Form 4 |
| 2025-04-28 | EFX | Option exercise | 22,160 | 0 | Form 4 |
| 2025-03-31 | NATL | Award / grant | 996 | 2,690 | Form 4 |
| 2025-02-13 | EFX | Option exercise | 22,161 | 164,404 | Form 4 |
| 2025-02-13 | EFX | Option exercise | 22,161 | 22,160 | Form 4 |
| 2025-02-11 | EFX | Withheld for tax | 1,213 | 142,243 | Form 4 |
| 2025-02-11 | EFX | Award / grant | 20,527 | 143,456 | Form 4 |
| 2025-02-10 | EFX | Award / grant | 13,524 | 122,929 | Form 4 |
| 2025-02-10 | EFX | Award / grant | 21,668 | 21,668 | Form 4 |
| 2025-02-10 | EFX | Award / grant | 23,519 | 23,519 | Form 4 |
| 2024-12-31 | NATL | Award / grant | 774 | 1,694 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.