Group 1 Automotive Inc (GPI) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 30, 2026.
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- Filings shown
- 10
- Open-market buys
- 104
- Open-market sells
- 0
- Buys, 10b5-1 box not checked
- 104 of 104
Counts cover the 10 most recent Form 4 filings Tradune holds for GPI (filed May 21 – Sep 30, 2026); the score below covers only the trailing 90 days (104 buys, 0 sells). No completed check of GPI's Form 4 list on SEC EDGAR is on record yet; the latest GPI filing Tradune holds was filed Sep 30, 2026. This is not guaranteed to be the complete record — see GPI's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 9 filings Tradune holds for GPI filed Aug 12 – Sep 30, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Conifer Management, L.L.C.10% owner | 104 | 0 | 720,030 | — | +$187,264,818 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
Weekly signal history
GPI appeared in 2 archived weekly editions as a top net buyer. These are frozen weekly snapshots, not a complete filing history.
- Week of Oct 7, 2026 104 open-market buys · $187,264,818 net
- Week of Sep 30, 2026 62 open-market buys · $89,462,049 net
An entry means this company met that edition’s displayed cluster or top-buyer threshold. Missing weeks do not mean no insider transaction occurred. All figures are derived from SEC Form 4 filings; open-market buys minus sales are shown as net only when every transaction value was disclosed.
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at GPI
Insiders reported 104 open-market purchases of GPI between May 21, 2026 and Sep 30, 2026, across 1 distinct buyer. The most recent purchase was reported by Conifer Management, L.L.C. (10% owner) on Sep 30, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 14,717 | $239.37 | 1,857,548 (indirect) | +0.8% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 12,342 | $240.31 | 1,869,890 (indirect) | +0.7% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,151 | $241.04 | 1,873,041 (indirect) | +0.2% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 5,352 | $242.65 | 1,878,393 (indirect) | +0.3% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 16,514 | $243.42 | 1,894,907 (indirect) | +0.9% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 16,343 | $244.61 | 1,911,250 (indirect) | +0.9% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,040 | $245.10 | 1,912,290 (indirect) | +0.1% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,133 | $238.37 | 1,842,831 (indirect) | +0.1% | Sep 30, 2026 |
| Open-market purchase 10b5-1 box not checked | 980 | $242.92 | 1,840,218 (indirect) | +0.1% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 160 | $244.83 | 1,840,698 (indirect) | +0.0% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 320 | $243.86 | 1,840,538 (indirect) | +0.0% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,821 | $235.63 | 1,774,871 (indirect) | +0.2% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 12,942 | $236.48 | 1,787,813 (indirect) | +0.7% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,292 | $237.84 | 1,791,105 (indirect) | +0.2% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 523 | $238.80 | 1,791,628 (indirect) | +0.0% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 14,570 | $239.52 | 1,806,198 (indirect) | +0.8% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 28,791 | $240.87 | 1,834,989 (indirect) | +1.6% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 4,249 | $241.69 | 1,839,238 (indirect) | +0.2% | Sep 29, 2026 |
| Open-market purchase 10b5-1 box not checked | 942 | $248.33 | 1,767,802 (indirect) | +0.1% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 7,741 | $247.40 | 1,766,860 (indirect) | +0.4% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,571 | $246.19 | 1,759,119 (indirect) | +0.1% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 19,257 | $245.54 | 1,756,548 (indirect) | +1.1% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 15,442 | $244.13 | 1,737,291 (indirect) | +0.9% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 34,593 | $243.23 | 1,721,849 (indirect) | +2.1% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 34,446 | $242.27 | 1,687,256 (indirect) | +2.1% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,672 | $240.83 | 1,652,810 (indirect) | +0.1% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 12,560 | $239.50 | 1,651,138 (indirect) | +0.8% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 230 | $250.35 | 1,772,050 (indirect) | +0.0% | Sep 28, 2026 |
| Open-market purchase 10b5-1 box not checked | 4,018 | $249.53 | 1,771,820 (indirect) | +0.2% | Sep 28, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 315 | $250.54 | 1,594,566 (indirect) | +0.0% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 30,460 | $252.35 | 1,625,026 (indirect) | +1.9% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 13,517 | $253.02 | 1,638,543 (indirect) | +0.8% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 35 | $253.85 | 1,638,578 (indirect) | +0.0% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,011 | $247.78 | 1,591,057 (indirect) | +0.2% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 857 | $248.69 | 1,591,914 (indirect) | +0.1% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,337 | $249.63 | 1,594,251 (indirect) | +0.1% | Sep 25, 2026 |
| Open-market purchase 10b5-1 box not checked | 17,647 | $247.26 | 1,529,937 (indirect) | +1.2% | Sep 24, 2026 |
| Open-market purchase 10b5-1 box not checked | 322 | $250.15 | 1,587,806 (indirect) | +0.0% | Sep 24, 2026 |
| Open-market purchase 10b5-1 box not checked | 80 | $251.22 | 1,587,886 (indirect) | +0.0% | Sep 24, 2026 |
| Open-market purchase 10b5-1 box not checked | 160 | $252.56 | 1,588,046 (indirect) | +0.0% | Sep 24, 2026 |
| Open-market purchase 10b5-1 box not checked | 42,495 | $247.96 | 1,572,432 (indirect) | +2.8% | Sep 24, 2026 |
| Open-market purchase 10b5-1 box not checked | 15,052 | $248.85 | 1,587,484 (indirect) | +1.0% | Sep 24, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 6,762 | $251.24 | 1,510,210 (indirect) | +0.4% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 12,079 | $250.07 | 1,503,448 (indirect) | +0.8% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 10,821 | $249.08 | 1,491,369 (indirect) | +0.7% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 5,395 | $248.36 | 1,480,548 (indirect) | +0.4% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 513 | $247.17 | 1,475,153 (indirect) | +0.0% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,960 | $253.20 | 1,512,290 (indirect) | +0.1% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 120 | $251.98 | 1,510,330 (indirect) | +0.0% | Sep 18, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,200 | $260.82 | 1,447,840 (indirect) | +0.1% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 5,705 | $261.84 | 1,453,545 (indirect) | +0.4% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 326 | $262.78 | 1,453,871 (indirect) | +0.0% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,181 | $264.15 | 1,457,052 (indirect) | +0.2% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 820 | $265.29 | 1,457,872 (indirect) | +0.1% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,640 | $266.23 | 1,459,512 (indirect) | +0.1% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 8,828 | $267.85 | 1,468,340 (indirect) | +0.6% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,380 | $269.06 | 1,470,720 (indirect) | +0.2% | Sep 17, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,920 | $269.89 | 1,474,640 (indirect) | +0.3% | Sep 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 854 | — | 28,551 | −2.9% | Sep 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 5,000 | $279.38 | 1,414,993 (indirect) | +0.4% | Sep 10, 2026 |
| Open-market purchase 10b5-1 box not checked | 10,883 | $280.48 | 1,425,876 (indirect) | +0.8% | Sep 10, 2026 |
| Open-market purchase 10b5-1 box not checked | 18,196 | $281.29 | 1,444,072 (indirect) | +1.3% | Sep 10, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,146 | $282.11 | 1,446,218 (indirect) | +0.1% | Sep 10, 2026 |
| Open-market purchase 10b5-1 box not checked | 222 | $282.99 | 1,446,440 (indirect) | +0.0% | Sep 10, 2026 |
| Open-market purchase 10b5-1 box not checked | 200 | $284.33 | 1,446,640 (indirect) | +0.0% | Sep 10, 2026 |
| Open-market purchase 10b5-1 box not checked | 23,449 | $282.21 | 1,397,698 (indirect) | +1.7% | Sep 9, 2026 |
| Open-market purchase 10b5-1 box not checked | 10,117 | $283.89 | 1,407,815 (indirect) | +0.7% | Sep 9, 2026 |
| Open-market purchase 10b5-1 box not checked | 421 | $284.60 | 1,408,236 (indirect) | +0.0% | Sep 9, 2026 |
| Open-market purchase 10b5-1 box not checked | 739 | $285.54 | 1,408,975 (indirect) | +0.1% | Sep 9, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,550 | $280.06 | 1,366,190 (indirect) | +0.3% | Sep 9, 2026 |
| Open-market purchase 10b5-1 box not checked | 8,059 | $281.68 | 1,374,249 (indirect) | +0.6% | Sep 9, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,018 | $286.33 | 1,409,993 (indirect) | +0.1% | Sep 9, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 439 | $290.27 | 1,307,025 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 458 | $289.34 | 1,306,586 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 40 | $287.09 | 1,306,128 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 440 | $286.75 | 1,306,088 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 167 | $284.83 | 1,305,648 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 160 | $293.14 | 1,308,617 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 720 | $305.74 | 1,362,640 (indirect) | +0.1% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,333 | $305.09 | 1,361,920 (indirect) | +0.2% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 492 | $304.27 | 1,359,587 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 19,286 | $302.46 | 1,359,095 (indirect) | +1.4% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 5,408 | $302.12 | 1,339,809 (indirect) | +0.4% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 9,865 | $300.72 | 1,334,401 (indirect) | +0.7% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 2,140 | $299.81 | 1,324,536 (indirect) | +0.2% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 79 | $298.22 | 1,322,396 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 6,611 | $297.52 | 1,322,317 (indirect) | +0.5% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,668 | $296.49 | 1,315,706 (indirect) | +0.3% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,421 | $295.54 | 1,312,038 (indirect) | +0.3% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,041 | $292.50 | 1,308,457 (indirect) | +0.1% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 391 | $291.39 | 1,307,416 (indirect) | +0.0% | Sep 4, 2026 |
| Open-market purchase 10b5-1 box not checked | 756 | $279.34 | 1,224,248 (indirect) | +0.1% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 1,132 | $278.18 | 1,223,492 (indirect) | +0.1% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 9,269 | $280.81 | 1,233,517 (indirect) | +0.8% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 7,319 | $281.49 | 1,240,836 (indirect) | +0.6% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 39,075 | $282.60 | 1,279,911 (indirect) | +3.1% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 8,967 | $283.10 | 1,288,878 (indirect) | +0.7% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 16,403 | $284.44 | 1,305,281 (indirect) | +1.3% | Sep 3, 2026 |
| Open-market purchase 10b5-1 box not checked | 200 | $285.14 | 1,305,481 (indirect) | +0.0% | Sep 3, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 720 | $273.66 | 1,196,519 (indirect) | +0.1% | Sep 2, 2026 |
| Open-market purchase 10b5-1 box not checked | 200 | $277.52 | 1,222,360 (indirect) | +0.0% | Sep 2, 2026 |
| Open-market purchase 10b5-1 box not checked | 12,976 | $276.77 | 1,222,160 (indirect) | +1.1% | Sep 2, 2026 |
| Open-market purchase 10b5-1 box not checked | 6,610 | $275.77 | 1,209,184 (indirect) | +0.5% | Sep 2, 2026 |
| Open-market purchase 10b5-1 box not checked | 6,055 | $274.95 | 1,202,574 (indirect) | +0.5% | Sep 2, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,539 | $269.66 | 1,195,799 (indirect) | +0.3% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 24 | $267.30 | 1,441 | −1.6% | Aug 11, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Restricted Stock Units | 336 | — | — | — | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 809 | — | 18,261 | +4.6% | May 19, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to GPI's (Sep 30, 2026).
Frequently asked about GPI insider activity
How many insiders bought GPI stock in these Form 4 filings?
1 distinct insider at Group 1 Automotive Inc reported 104 open-market purchases (Form 4 code P) of GPI shares between May 21, 2026 and Sep 30, 2026, the most recent filed by Conifer Management, L.L.C. (10% owner) on Sep 30, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for GPI?
The most recent Form 4 on this page was filed by Conifer Management, L.L.C. (10% owner) on Sep 30, 2026, reporting 29 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market GPI insider purchase shown?
The largest open-market purchase among the filings shown was 39,075 GPI shares at $282.60 (about $11,042,466) by Conifer Management, L.L.C. (10% owner) on Sep 3, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
Do the recent GPI insider purchases have the Form 4 10b5-1 box checked?
No. All 104 GPI open-market purchases shown were reported with the Rule 10b5-1 box not checked. A blank box records what the filer disclosed; it does not prove that no plan exists. Latest: Conifer Management, L.L.C. (10% owner) on Sep 30, 2026, 2,133 shares.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track GPI insider filings free →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.