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Insider Trading Intelligence
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Douglas K. Mellinger

MARA
DIRECTOR · MARA HOLDINGS, INC. · CIK 0001066960
FILING MIX · LIFETIME36%/64%
BUYS
9
SELLS
16
TOTAL VALUE
$1.30M
COMPANIES
1
ACTIVE SINCE
Dec 2022
HOLDINGS NOW
231,618
AVG SELL PX
$10.83
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
16 backtested trades · 8 horizons · 18 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Douglas K. Mellinger, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d16+50.00%+0.36%+0.82%-0.46%-2.85%—
14d16+50.00%+4.98%+1.14%+3.84%+1.03%—
30d16+62.50%+12.03%+2.23%+9.80%-5.05%—
60d16+62.50%+13.58%+3.81%+9.77%-4.21%—
90d16+56.25%+12.46%+3.88%+8.58%-5.30%—
180d16+75.00%+16.71%+7.36%+9.36%-21.74%—
1y16(5 pending)+63.64%+117.20%+21.24%+95.95%-17.62%—
2y16(13 pending)+66.67%+366.20%+56.53%+309.68%+400.30%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MARA · 231,618 shares · as of Jun 22, 2026
063,405126,809190,214253,6182023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 9 buys / 16 sellsCOVERAGE · 15 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
7,000$16.00$112.0K231,618Jun 22, 2026Jun 24, 2026 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASEGRANT
Stock grant
82,759——253,618Feb 13, 2026Feb 13, 2026 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.55$16.6K170,859Nov 10, 2025Nov 12, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$20.71$20.7K171,859Oct 7, 2025Oct 8, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.10$16.1K172,859Sep 10, 2025Sep 11, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.21$16.2K173,859Aug 7, 2025Aug 8, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$17.42$17.4K174,859Jul 7, 2025Jul 9, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.00$16.0K175,859Jun 6, 2025Jun 10, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
3,000$16.00$48.0K176,859May 9, 2025May 13, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASEGRANT
Stock grant
43,103——179,859Feb 28, 2025Feb 28, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$17.00$17.0K137,756Jan 13, 2025Jan 15, 2025 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$23.80$23.8K138,756Dec 12, 2024Dec 16, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$24.06$24.1K139,756Nov 12, 2024Nov 13, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.77$16.8K140,756Oct 14, 2024Oct 16, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.00$16.0K141,756Sep 12, 2024Sep 16, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
SALE10b5-1
10b5-1 plan
1,000$16.05$16.1K142,756Aug 12, 2024Aug 14, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASEGRANT
Stock grant
28,887——143,756May 1, 2024May 6, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASEGRANT
Stock grant
62,317——114,869Jan 31, 2024Feb 2, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
SALE
10,000$7.25$72.5K52,552Feb 3, 2023Jan 2, 2024 ↗View →
MARA
MARA HOLDINGS, INC.
SALE
32,552$7.68$250.0K0Jan 16, 2023Jul 27, 2023 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASE
32,552$7.68$250.0K52,552Jan 16, 2023Jul 27, 2023 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASEGRANT
Stock grant
32,552$7.68$250.0K32,552Jan 16, 2023Jul 27, 2023 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASE
10,000$3.27$32.7K29,934Dec 28, 2022Dec 30, 2022 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASE
10,000$3.27$32.7K28,771Dec 28, 2022Dec 29, 2022 ↗View →
MARA
MARA HOLDINGS, INC.
PURCHASE
10,000$3.84$38.4K18,771Dec 19, 2022Dec 22, 2022 ↗View →
Other insiders · MARA
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About this filer
CIK 0001066960
ROLE
Director
PRIMARY
MARA
COMPANIES
1
ACTIVE SINCE
Dec 2022
MARKETPEEL · /INSIDER/0001066960DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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