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EdgarHawk

Sean Maduck

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Officer

Latest: Officer selling · May 2026

13 filings analyzed · 1 company · Latest 2026-06-03

Companies

Company Buys Sells Direction
CORCEPT THERAPEUTICS INC CORT 0 63 Net selling

Activity

June 2026
medium
Sell
25,000 shares
$1,755,183
Significance 6/10

Sean Maduck sells 25,000 shares (71.9% of holdings) at $70.21 blended price under 10b5-1 plan

Sean Maduck executed 2 separate sales totaling 25,000 shares for $1,755,183.48 on 2026-06-01 under a pre-arranged 10b5-1 trading plan adopted on 2025-12-08, reducing non-derivative holdings from 34,755 to 9,755 shares (-71.9% vs pre-transaction holdings). The current stock price of $72.65 sits -20.2% from the 52-week high of $91.00, yet Maduck retains 141,986 shares in stock options (derivative securities), indicating his economic interest in CORT remains substantial despite the scheduled share disposition. His prior 5 sales at CORT have produced mixed 30-day and 90-day outcomes (ranging from -56.2% to +13.1% in the 30-day window), while his cross-ticker track record shows an average 90-day return of -13.4% after his 20 prior sells across all tickers.

May 2026
medium
Sell
75,000 shares
$4,918,944
Significance 6/10

Sean Maduck sells 75,000 shares (89.3% of holdings) for $4.9M under 10b5-1 plan at $65.59 avg; stock now +49.2% in 30 days

Sean Maduck executed 2 separate sales totaling 75,000 shares for $4,918,943.74 on 2026-05-27 under a pre-arranged 10b5-1 trading plan adopted on 2025-12-08, reducing his non-derivative holdings from 83,977 shares to 8,977 shares. The sales occurred at blended average price of $65.59; CORT stock has since moved to $69.49 (current price), representing a +49.2% 30-day change from the transaction date. This transaction is scheduled rather than discretionary per the 10b5-1 plan flag. Maduck retains 166,986 shares through stock option holdings (Table II), meaning his overall economic position extends beyond the non-derivative shares sold. His prior open-market history across all tickers shows an average 90-day return of -13.4% following 20 prior sells, while his same-ticker history at CORT over 5 prior trades shows mixed results: the most recent prior sale on 2025-12-01 experienced a -56.2% 30-day decline, though earlier sales at this ticker showed smaller 30-day reversals.

December 2025
low
Sell
20,000 shares
$1,590,490
Significance 4/10

Director sold 20,000 CORT shares at $79.52, reducing stake 71% to 8,179 shares; stock up +12.8% in 30d, +20.6% in 90d

Maduck Sean sold 20,000 shares of CORCEPT THERAPEUTICS INC at $79.52 on 2025-12-01, with the stock currently trading at $83.67, suggesting the sale occurred before a subsequent 5.2% price appreciation. The sale reduced his holdings by 71% to only 8,179 shares remaining. Across his cross-ticker open-market history, his prior sells averaged poorly-timed outcomes with a 90-day return of -9.0%, but at CORT specifically, only 1 of 5 prior measurable sells was well-timed (20% success rate on 90-day outcomes). The stock has posted strong recent momentum with 30-day gains of +12.8% and 90-day gains of +20.6%, and the company shows healthy fundamentals with $207.6M quarterly revenue and 39.9% annual revenue growth, though the valuation at a P/E of 82.84 remains elevated. The transaction's significance is muted given the absence of a clear pattern at this specific ticker and the subsequent strong stock appreciation.

November 2025
medium
Sell
20,000 shares
$1,479,816
Significance 6/10

Maduck Sean sold 20,000 shares of CORT at $73.99 on 2025-11-03, reducing holdings by 71.7% to 7,904 shares ($1.5M)

Maduck Sean executed a substantial sale of 20,000 shares at $73.99, eliminating over two-thirds of his CORT position. The timing relative to recent price action is noteworthy: the stock has declined 14.7% over the past 30 days and now trades 32.9% below its 52-week high of $114.22, though it remains up 7.2% over 90 days. His cross-ticker track record shows a 73.33% well-timed rate on prior sells with an average 90-day return of -9.4%, suggesting a demonstrated ability to exit ahead of declines; however, at CORT specifically, his five prior trades show a mixed record with outcomes ranging from -14.2% to +21.5% over 30 days, and none yet measurable at the 90-day horizon. CORT's fundamentals remain robust—annual revenue growth of 39.9%, a net income of $19.7M, and a market cap of $8.1B—placing this trade in the context of a high-growth but high-valuation stock (P/E 75.89) at a depressed point relative to recent peaks.

October 2025
high
Sell
20,000 shares
$1,701,232
Significance 6/10

Maduck Sean sold 20,000 shares at $85.06 avg, reducing holdings by 71.7% in 3 separate sales at CORT on 2025-10-01

Maduck Sean executed 3 separate sales totaling 20,000 shares for $1,701,231.77 on 2025-10-01, bringing his position from 27,904 shares to 7,904 shares (a 71.7% reduction). The transactions occurred at prices ranging from $83.73 to $85.58, with a blended average of $85.06, compared to the current price of $88.15. While the stock has appreciated 23.6% over 30 days and 22.0% over 90 days, and Maduck's prior CORT sales at similar intervals in August and September showed positive 30-day returns, his cross-ticker track record shows a modest 73.33% well-timed rate at the 90-day mark, with an average 90-day return of -4.0%, suggesting his historical sell timing has been modestly favorable but not consistently predictive. The substantial reduction in stake warrants tracking whether subsequent price action validates the timing of this significant position reduction.

September 2025
high
Sell
20,000 shares
$1,409,828
Significance 6/10

Maduck Sean sells 20,000 shares (71.7% of holdings) at $70.49 avg; CORT off -39.3% from 52-week high

Maduck Sean executed two separate sales totaling 20,000 shares for $1,409,828.00 at an average price of $70.49 on 2025-09-02, reducing his holdings from 27,904 shares to 7,904 shares (a 71.7% reduction). His cross-ticker track record shows a 73.33% well-timed rate on 18 prior sells with an average 90-day return of -4.0%, but at CORT specifically, his 5 prior trades include two measurable outcomes from June 2025 that were both well-timed (trailing 90-day returns of -10.5% and -13.7%). Against this backdrop of demonstrated selling timing, the stock is currently trading at $69.37, down 39.3% from its 52-week high of $114.22, suggesting either a significant revaluation or sector headwinds. The transaction occurs while CORT maintains strong fundamentals—revenue growth of 39.9% year-over-year with net income of $35,149,000—though the P/E of 54.62 reflects elevated expectations. The near-total liquidation of a large position by an insider with a history of well-timed exits, combined with the stock's sharp drawdown from highs, warrants monitoring of whether this signals a view divergent from current market pricing.

August 2025
medium
Sell
35,007 shares
$2,373,237
Significance 6/10

Maduck Sean sold 35,007 shares (82.0% of holdings) for $2,373,237.43 at $67.79 blended average

Maduck Sean executed 3 separate sales totaling 35,007 shares for $2,373,237.43 on 2025-08-01, reducing his position from 42,688 shares to 7,681 shares—an 82.0% reduction. The blended average sale price was $67.79, compared to the current price of $70.45, meaning the shares have appreciated modestly since the sale. His prior trades at CORT show mixed timing outcomes: his May 2025 sell subsequently declined -7.0% over 90 days (well-timed), but four June 2025 sells show 30-day declines ranging from -8.4% to -11.7%. Across his broader cross-ticker open-market history, his 90-day well-timed rate is 63.64%, indicating performance slightly better than a coin flip. With CORT trading at -38.3% from its 52-week high of $114.22, the company's fundamentals remain solid (P/E 55.47, +39.9% annual revenue growth, $35.1M net income on $194.4M quarterly revenue), leaving the motivation for this concentrated reduction ambiguous given the valuation context.

June 2025
high
Sell
20,000 shares
$1,581,686
Significance 6/10

Maduck sold 20,000 CORT shares (53% of holdings) across 4 transactions on 2025-06-02 for $1.6M at $79.08 avg; stock now $69.98 (-38.7% from 52-week high).

Maduck executed 4 separate sales totaling 20,000 shares for $1,581,686.50, reducing his stake from 37,705 to 17,705 shares and raising $1.6M. The blended average sale price of $79.08 stands notably above the current price of $69.98, suggesting the insider liquidated at materially higher valuations than today. At CORT specifically, Maduck's prior 5 trades show recent sales (May and early June 2025) with modest near-term gains (30-day returns of +6.3%, +7.4%, +7.8%), while earlier April–March sales deteriorated sharply (−37.6% and −29.1% over 30 days). His cross-ticker track record shows a 0.00% well-timed rate on 11 prior sells, with a poor average 90-day return of +31.3%, indicating his sales have historically been followed by stock appreciation—the opposite of profitable exit timing. The current valuation backdrop features a P/E of 55.54 and strong fundamentals (revenue growth of +39.9% annually, net income of $20,547,000.00), but at the price points where he sold ($77.91–$80.77), the stock was closer to its 52-week high of $114.22 than to its current level, positioning this sale in a region of elevated multiples relative to subsequent market repricing.

May 2025
high
Sell
39,410 shares
$2,842,769
Significance 6/10

Maduck Sean sold 39,410 shares over two days (May 1–2) for $2.8M at blended $72.13; post-transaction holdings 85.6K shares.

Maduck Sean executed 3 separate sales totaling 39,410 shares for $2,842,769.24 between May 1–2, 2025, reducing his position by -31.5% from 125,032 to 85,622 shares. The sales occurred at an average price of $72.13, near the current $73.94 level. His prior trades at CORT show a recent pattern of consistent sales, with four consecutive March/early-April sales each showing sharp 30-day declines of -28.3% to -37.6% in the weeks following. The cross-ticker track record records zero well-timed sells (0.00% rate), though his CORT-specific recent sales have seen immediate subsequent weakness, suggesting possible early awareness of near-term headwinds.

April 2025
high
Sell
100,590 shares
$10,121,594
Significance 6/10

Maduck sells 100,590 CORT shares across 4 transactions for $10.1M (blended avg $100.62); now holds 85.6K shares.

Maduck executed 4 separate sales on March 31–April 1, 2025, disposing of 100,590 shares representing 54.0% of his pre-transaction holdings and generating $10.1M in proceeds. The multi-tranche execution (79,277 shares at $100.26, 15,133 at $101.43, 5,590 at $102.16, and 590 at $114.55) occurred as CORT stock traded near its 52-week high of $114.22; the stock is now down 26.6% from that peak to $83.81 current price. His prior 4 sales at CORT showed a 0% well-timed rate at the 90-day mark, and across his broader cross-ticker selling history his track record shows 0.00% well-timed rate, indicating his prior exits have not preceded declines. The fundamental backdrop shows strong revenue growth of 39.9% year-over-year, positive net income of $47.2M, and a P/E of 49.89, reflecting a high-multiple growth profile.

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