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Insider Trading Intelligence
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Charles W. Hull

DDD
EVP & CHIEF TECHNOLOGY OFFICER · 3D SYSTEMS CORP · CIK 0001105964
FILING MIX · LIFETIME34%/66%
BUYS
16
SELLS
31
TOTAL VALUE
$2.36M
COMPANIES
1
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
186,565
AVG SELL PX
$8.56
TRADE KIND
SHOWING 47 / 47
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
4 backtested trades · 8 horizons · 1 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Charles W. Hull, 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
7d4+100.00%-6.29%-1.54%-4.76%-5.59%—
14d4+50.00%-0.55%+0.84%-1.40%+0.83%—
30d4+50.00%-2.92%+2.02%-4.95%-2.42%—
60d4+50.00%-0.92%-0.10%-0.82%-1.17%—
90d4+100.00%-23.97%-3.17%-20.80%-23.55%—
180d4+100.00%-31.77%-3.12%-28.65%-28.04%—
1y4+100.00%-28.17%+2.96%-31.13%-22.83%—
2y4(1 pending)+100.00%-65.97%+28.99%-94.96%-94.33%—
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
DDD · 186,565 shares · as of Apr 14, 2026
0111,982223,963335,945447,926202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 16 buys / 31 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
4,102$1.98$8.1K186,565Apr 14, 2026Apr 15, 2026 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
4,462$1.87$8.3K190,667Apr 1, 2026Apr 3, 2026 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
50,000——50,000Mar 13, 2026Mar 17, 2026 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
50,000——195,129Mar 13, 2026Mar 17, 2026 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
4,929$2.12$10.4K145,129Sep 5, 2025Sep 9, 2025 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
4,092$2.03$8.3K150,058Apr 14, 2025Apr 16, 2025 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
32,500——32,500Apr 1, 2025Mar 17, 2026 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
32,500——154,150Apr 1, 2025Mar 17, 2026 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
32,500$2.07$67.3K154,150Apr 1, 2025Apr 11, 2025 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
2,484$2.74$6.8K121,650Mar 17, 2025Mar 19, 2025 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
115,971$3.86$447.6K331,955Dec 17, 2024Dec 18, 2024 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
41,322——124,134Sep 5, 2024Sep 9, 2024 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
3,445$3.53$12.2K82,812Apr 15, 2024Apr 17, 2024 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
2,091$4.55$9.5K86,257Mar 15, 2024Mar 18, 2024 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
13,317$4.86$64.7K88,348Jan 16, 2024Jan 18, 2024 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
34,608——101,665Jan 16, 2024Jan 18, 2024 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
3,136$5.19$16.3K67,057Jan 12, 2024Jan 17, 2024 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
29,880——70,193Apr 14, 2023Apr 18, 2023 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
2,091$10.17$21.3K40,313Mar 15, 2023Mar 16, 2023 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
3,287$11.66$38.3K42,404Feb 15, 2023Feb 17, 2023 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
3,491$9.00$31.4K45,691Jan 12, 2023Jan 13, 2023 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
2,452$9.21$22.6K49,182Dec 13, 2022Dec 14, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
26,386$10.95$288.8K51,634Jun 8, 2022Jun 10, 2022 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
18,137——78,020Mar 15, 2022Mar 17, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
13,226$14.77$195.4K59,883Mar 8, 2022Mar 9, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
16,389$14.78$242.3K447,926Mar 7, 2022Mar 9, 2022 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
23,516——83,399Mar 3, 2022Mar 7, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
10,290$15.81$162.7K73,109Mar 3, 2022Mar 7, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
2,140$19.38$41.5K63,398Feb 15, 2022Feb 17, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
3,515$19.38$68.1K59,883Feb 15, 2022Feb 17, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
5,299$20.18$106.9K65,538Jan 12, 2022Jan 14, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
3,119$20.18$62.9K70,837Jan 12, 2022Jan 14, 2022 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & CTO (Regenerative Med)
1,651$21.33$35.2K73,956Dec 13, 2021Dec 15, 2021 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
1,085$38.79$42.1K150,117Mar 1, 2021Mar 2, 2021 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
3,118$47.85$149.2K151,202Feb 16, 2021Feb 17, 2021 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
2,014$47.85$96.4K154,320Feb 16, 2021Feb 17, 2021 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
15,381——156,334Jan 12, 2021Jan 14, 2021 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
23,072——140,953Jan 12, 2021Jan 14, 2021 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
3,141$10.36$32.5K117,881Dec 14, 2020Dec 15, 2020 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
2,629$5.81$15.3K121,022Aug 17, 2020Aug 18, 2020 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
3,639——124,877Mar 2, 2020Mar 4, 2020 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
1,226$9.53$11.7K123,651Mar 2, 2020Mar 4, 2020 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP & Chief Technology Officer
1,121$9.53$10.7K121,238Mar 2, 2020Mar 4, 2020 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
80,000——80,000Feb 18, 2020Feb 20, 2020 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
27,045——122,359Feb 18, 2020Feb 20, 2020 ↗View →
DDD
3D SYSTEMS CORP
PURCHASEGRANT
Stock grant
80,000——160,000Feb 18, 2020Feb 20, 2020 ↗View →
DDD
3D SYSTEMS CORP
SALE
EVP, Chief Technology Officer
2,238$12.13$27.1K95,314Feb 18, 2020Feb 20, 2020 ↗View →
Other insiders · DDD
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About this filer
CIK 0001105964
ROLE
EVP & Chief Technology Officer
PRIMARY
DDD
COMPANIES
1
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001105964DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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