Corcept Therapeutics Inc (CORT) 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 Oct 5, 2026.
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- Filings shown
- 33
- Open-market buys
- 0
- Open-market sells
- 69
Counts cover the 33 most recent Form 4 filings Tradune holds for CORT (filed Jul 6 – Oct 5, 2026); the score below covers only the trailing 90 days (0 buys, 56 sells). No completed check of CORT's Form 4 list on SEC EDGAR is on record yet; the latest CORT filing Tradune holds was filed Oct 5, 2026. This is not guaranteed to be the complete record — see CORT'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 28 filings Tradune holds for CORT filed Aug 3 – Oct 5, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
56 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 53 sales· 416,523 sh
- checkbox disclosed
- On filings with the box not checked
- 3 sales· 38,225 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Atabak MokariChief Financial Officer | 0 | 13 | — | 80,000 | −$9,177,109 |
| Sean MaduckOfficer (see filing) | 0 | 11 | — | 105,955 | −$12,521,293 |
| Roberto Wandenkolk VieiraPresident, Oncology | 0 | 11 | — | 66,962 | −$7,458,056 |
| Joseph Douglas LyonOfficer (see filing) | 0 | 6 | — | 21,540 | −$2,471,484 |
| James N. WilsonDirector | 0 | 6 | — | 20,000 | −$2,221,201 |
| David L. MahoneyDirector | 0 | 4 | — | 103,606 | −$12,251,411 |
| William GuyerChief Development Officer | 0 | 3 | — | 20,000 | −$2,267,452 |
| Kimberly ParkDirector | 0 | 1 | — | 26,685 | −$3,270,169 |
| Gary Charles RobbChief Business Officer | 0 | 1 | — | 10,000 | −$1,162,572 |
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 →
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 CORT
No open-market insider purchases (Form 4 code P) were reported for CORT between Jul 6, 2026 and Oct 5, 2026. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock option (right to buy) | 8,333 | — | — | — | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 5,147 | $116.59 | 3,946 | −57% | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 2,086 | $115.73 | 9,093 | −19% | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 1,100 | $114.52 | 11,179 | −9.0% | Oct 2, 2026 |
| Option exercise | 8,333 | $21.63 | 12,279 | +211% | Oct 2, 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 |
|---|---|---|---|---|---|
| Option exercise Stock option (right to buy) | 5,833 | — | — | — | Oct 2, 2026 |
| Option exercise Stock option (right to buy) | 3,357 | — | — | — | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 4,744 | $116.54 | 5,683 | −45% | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 4,446 | $115.70 | 10,427 | −30% | Oct 2, 2026 |
| Option exercise | 5,833 | $19.26 | 14,873 | +65% | Oct 2, 2026 |
| Option exercise | 3,357 | $13.56 | 9,040 | +59% | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 810 | $115.40 | 5,683 | −12% | Oct 1, 2026 |
| Option exercise Stock option (right to buy) | 810 | — | — | — | Oct 1, 2026 |
| Option exercise | 810 | $13.56 | 6,493 | +14% | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 8,744 | $116.55 | 9,938 | −47% | Oct 2, 2026 |
| Option exercise Stock option (right to buy) | 24,587 | — | — | — | Oct 2, 2026 |
| Option exercise | 24,587 | $8.27 | 34,525 | +247% | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 15,843 | $116.12 | 18,682 | −46% | Oct 2, 2026 |
| Open-market sale 10b5-1 box checked | 413 | $115.54 | 9,938 | −4.0% | Oct 1, 2026 |
| Option exercise | 413 | $8.27 | 10,351 | +4.2% | Oct 1, 2026 |
| Option exercise Stock option (right to buy) | 413 | — | — | — | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Stock Option (right to buy) | 100,000 | — | — | — | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 5,000 | — | 20,571 (indirect) | +32% | Sep 24, 2026 |
| Gift | 17,100 | — | 14,056 | −55% | Sep 24, 2026 |
| Gift | 5,000 | — | 20,571 (indirect) | +32% | Sep 24, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 17,493 | $8.27 | 31,156 | +128% | Sep 17, 2026 |
| Option exercise Stock option (right to buy) | 17,493 | — | — | — | Sep 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 296 | $100.82 | 3,946 | −7.0% | Sep 16, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 2,800 | $111.70 | 1,064,543 (indirect) | −0.3% | Sep 15, 2026 |
| Open-market sale 10b5-1 box checked | 6,800 | $110.27 | 1,067,743 (indirect) | −0.6% | Sep 15, 2026 |
| Open-market sale 10b5-1 box checked | 400 | $110.84 | 1,067,343 (indirect) | −0.0% | Sep 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock option (right to buy) | 2,596 | — | — | — | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 2,188 | $114.12 | 5,683 | −28% | Sep 14, 2026 |
| Option exercise Stock option (right to buy) | 7,404 | — | — | — | Sep 14, 2026 |
| Option exercise | 2,596 | $11.35 | 8,279 | +46% | Sep 14, 2026 |
| Option exercise | 7,404 | $13.56 | 15,683 | +89% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 7,812 | $113.32 | 7,871 | −50% | Sep 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 117 | $113.38 | 9,938 | −1.2% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 10,989 | $114.71 | 12,036 | −48% | Sep 1, 2026 |
| Option exercise | 25,000 | $8.27 | 34,755 | +256% | Sep 1, 2026 |
| Open-market sale 10b5-1 box checked | 11,730 | $113.94 | 23,025 | −34% | Sep 1, 2026 |
| Open-market sale 10b5-1 box checked | 2,281 | $115.61 | 9,755 | −19% | Sep 1, 2026 |
| Grant / award | 150 | $113.38 | 9,905 | +1.5% | Sep 1, 2026 |
| Grant / award | 150 | — | 10,055 | +1.5% | Sep 1, 2026 |
| Option exercise Stock option (right to buy) | 25,000 | — | — | — | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 102 | $113.38 | 16,304 | −0.6% | Sep 2, 2026 |
| Grant / award | 138 | $113.38 | 16,268 | +0.9% | Sep 1, 2026 |
| Grant / award | 138 | — | 16,406 | +0.8% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 91 | $113.38 | 13,663 | −0.7% | Sep 2, 2026 |
| Grant / award | 164 | $113.38 | 13,590 | +1.2% | Sep 1, 2026 |
| Grant / award | 164 | — | 13,754 | +1.2% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 23,770 | $110.70 | 15,205 | −61% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 1,537 | $111.37 | 13,668 | −10% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 974 | $112.40 | 12,694 | −7.1% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 1,606 | $113.72 | 11,088 | −13% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 5,621 | $114.58 | 5,467 | −51% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 1,225 | $115.44 | 4,242 | −22% | Sep 2, 2026 |
| Option exercise Stock option (right to buy) | 58,333 | — | — | — | Sep 2, 2026 |
| Tax withholding | 102 | $113.38 | 4,242 | −2.3% | Sep 2, 2026 |
| Option exercise | 58,333 | $21.63 | 62,575 | +1,375% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 23,600 | $109.35 | 38,975 | −38% | Sep 2, 2026 |
| Grant / award | 138 | $113.38 | 4,206 | +3.4% | Sep 1, 2026 |
| Grant / award | 138 | — | 4,344 | +3.3% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 72 | $113.38 | 5,683 | −1.3% | Sep 2, 2026 |
| Grant / award | 130 | $113.38 | 5,625 | +2.4% | Sep 1, 2026 |
| Grant / award | 130 | — | 5,755 | +2.3% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 164 | $113.38 | 4,149 | +4.1% | Sep 1, 2026 |
| Grant / award | 164 | — | 4,313 | +4.0% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 3,315 | $122.09 | 26,685 | −11% | Aug 26, 2026 |
| Open-market sale 10b5-1 box not checked | 26,685 | $122.55 | 0 | −100% | Aug 26, 2026 |
| Option exercise | 30,000 | $13.49 | 30,000 | — | Aug 26, 2026 |
| Option exercise Stock Option (right to buy) | 30,000 | — | — | — | Aug 26, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 5,870 | $126.06 | 9,755 | −38% | Aug 25, 2026 |
| Open-market sale 10b5-1 box checked | 25,085 | $125.47 | 15,625 | −62% | Aug 25, 2026 |
| Option exercise Stock option (right to buy) | 30,955 | — | — | — | Aug 25, 2026 |
| Option exercise | 30,955 | $11.35 | 40,710 | +317% | Aug 25, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 7,055 | $118.88 | 1,133,939 (indirect) | −0.6% | Aug 18, 2026 |
| Open-market sale 10b5-1 box checked | 4,984 | $117.47 | 1,232,161 (indirect) | −0.4% | Aug 18, 2026 |
| Open-market sale 10b5-1 box checked | 400 | $119.64 | 1,133,539 (indirect) | −0.0% | Aug 18, 2026 |
| Open-market sale 10b5-1 box checked | 91,167 | $118.24 | 1,140,994 (indirect) | −7.4% | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 125 | — | 13,426 | −0.9% | Aug 17, 2026 |
| Open-market sale 10b5-1 box not checked | 10,000 | $116.26 | 39,716 (indirect) | −20% | Aug 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 3,664 | $8.27 | 13,419 | +38% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 3,664 | $114.49 | 9,755 | −27% | Aug 14, 2026 |
| Option exercise Stock option (right to buy) | 3,664 | — | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 2,279 | $112.64 | 1,074,543 (indirect) | −0.2% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 3,053 | $110.49 | 1,081,490 (indirect) | −0.3% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 4,668 | $111.44 | 1,076,822 (indirect) | −0.4% | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 3,000 | — | 15,571 (indirect) | +24% | Aug 12, 2026 |
| Gift | 3,000 | — | 15,571 (indirect) | +24% | Aug 12, 2026 |
| Gift | 11,530 | — | 13,551 | −46% | Aug 12, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock option (right to buy) | 1,031 | — | — | — | Aug 10, 2026 |
| Option exercise | 1,031 | $8.27 | 10,786 | +11% | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 1,031 | $114.52 | 9,755 | −9.6% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock Option (right to buy) | 16,300 | — | — | — | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 4,770 | $114.04 | 3,985 | −54% | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 11,530 | $113.18 | 8,755 | −57% | Aug 10, 2026 |
| Option exercise | 16,300 | $21.65 | 20,285 | +409% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 3,700 | $21.65 | 7,685 | +93% | Aug 4, 2026 |
| Open-market sale 10b5-1 box checked | 3,700 | $113.12 | 3,985 | −48% | Aug 4, 2026 |
| Option exercise Stock Option (right to buy) | 3,700 | — | — | — | Aug 4, 2026 |
Listing the 25 most recent of 33 Form 4 filings held for CORT; the 8 older filings (filed Jul 6 – Aug 5, 2026) are counted above but not listed here — see CORT's full Form 4 filing history on SEC EDGAR.
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CORT's (Oct 5, 2026).
Frequently asked about CORT insider activity
How many insiders bought CORT stock in these Form 4 filings?
No open-market purchases (Form 4 code P) of CORT shares were reported by Corcept Therapeutics Inc insiders between Jul 6, 2026 and Oct 5, 2026. The 33 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for CORT?
The most recent Form 4 on this page was filed by Justin Frederick Gunn (Officer (see filing)) on Oct 5, 2026, reporting 1 transaction. 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 CORT insider sale shown?
The largest open-market sale among the filings shown was 91,167 CORT shares at $118.24 (about $10,779,367) by David L. Mahoney (Director) on Aug 18, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
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 CORT 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.