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SM

Stephen Mcmillan

TDC
PRESIDENT AND CEO · TERADATA CORP /DE/ · CIK 0001719723
FILING MIX · LIFETIME28%/72%
BUYS
21
SELLS
55
TOTAL VALUE
$38.69M
COMPANIES
3
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
847,428
AVG SELL PX
$37.05
TRADE KIND
SHOWING 76 / 76
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
22 backtested trades · 8 horizons · 9 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Stephen Mcmillan, 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
7d22+45.45%+0.71%+0.63%-0.20%-0.44%—
14d22+22.73%+6.74%+0.88%+5.93%+0.97%—
30d22+36.36%+4.42%+1.80%+2.62%-0.27%—
60d22(1 pending)+38.10%+1.42%+1.26%+0.16%-3.52%—
90d22(1 pending)+42.86%+7.38%+4.94%+2.42%-7.06%—
180d22(2 pending)+60.00%+1.74%+11.11%-9.37%-17.29%—
1y22(2 pending)+60.00%-2.63%+23.88%-26.51%-29.61%—
2y22(3 pending)+52.63%-6.05%+40.31%-46.37%-37.00%—
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
TDC · 762,446 shares · as of May 12, 2026
0202,263404,526606,789809,052202120222023202420252026SHARES 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 · 21 buys / 55 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
LUMN
LUMEN TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
25,197$9.44$237.9K76,591May 21, 2026May 26, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
20,000$31.71$634.2K762,446May 12, 2026May 13, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
4,376——782,446Mar 9, 2026Mar 10, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
22,230$28.02$622.9K786,822Mar 6, 2026Mar 10, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
40,319$30.36$1.22M602,781Mar 3, 2026Mar 5, 2026 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
206,271——809,052Mar 1, 2026Mar 10, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
20,090$31.49$632.6K643,100Feb 27, 2026Mar 3, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
50,000$30.26$1.51M663,190Feb 26, 2026Feb 27, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
74,121$37.88$2.81M626,406Feb 11, 2026Feb 13, 2026 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
141,402——700,527Feb 11, 2026Feb 13, 2026 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
105,130——731,536Feb 11, 2026Feb 13, 2026 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
18,346$37.88$694.9K713,190Feb 11, 2026Feb 13, 2026 ↗View →
LUMN
LUMEN TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
51,394——51,394May 14, 2025May 16, 2025 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
36,742——559,125Mar 7, 2025Mar 10, 2025 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
22,650$22.98$520.5K595,867Mar 6, 2025Mar 10, 2025 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
231,054——618,517Mar 3, 2025Mar 4, 2025 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
18,811$23.38$439.8K387,463Mar 3, 2025Mar 4, 2025 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
20,470$23.46$480.2K406,274Feb 27, 2025Feb 28, 2025 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
114,262——487,841Feb 12, 2025Feb 14, 2025 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
61,097$24.62$1.50M426,744Feb 12, 2025Feb 14, 2025 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
20,000$30.00$600.1K373,579Nov 8, 2024Nov 8, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
9,900$31.94$316.2K393,679May 24, 2024May 29, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
100$32.74$3.3K393,579May 24, 2024May 29, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
182,754——403,579Mar 7, 2024Mar 8, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
22,650$38.82$879.3K586,333Mar 6, 2024Mar 8, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
15,636$38.56$602.9K627,794Mar 1, 2024Mar 5, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
18,811$38.56$725.4K608,983Mar 1, 2024Mar 5, 2024 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
115,128——643,430Feb 27, 2024Feb 29, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
40,597$38.22$1.55M528,302Feb 22, 2024Feb 23, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
66,903$48.79$3.26M568,899Feb 13, 2024Feb 15, 2024 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
125,305——635,802Feb 13, 2024Feb 15, 2024 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
5,507$46.06$253.7K512,490Nov 10, 2023Nov 13, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
1,993$46.61$92.9K510,497Nov 10, 2023Nov 13, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
7,500$44.39$332.9K517,997Sep 11, 2023Sep 13, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
1,400$46.07$64.5K525,497Aug 11, 2023Aug 15, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
6,100$45.07$275.0K526,897Aug 11, 2023Aug 15, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
27,680$49.11$1.36M545,497Jun 9, 2023Jun 13, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE10b5-1
10b5-1 plan
12,500$49.00$612.5K532,997Jun 9, 2023Jun 13, 2023 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
127,389——573,177Mar 6, 2023Mar 8, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
11,000$41.03$451.4K487,571Mar 1, 2023Mar 3, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
22,972$40.89$939.3K464,599Mar 1, 2023Mar 3, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
18,811$40.89$769.2K445,788Mar 1, 2023Mar 3, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
128,145$39.58$5.07M498,571Feb 13, 2023Feb 15, 2023 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
276,388——626,716Feb 13, 2023Feb 15, 2023 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
22,589$38.37$866.7K362,408Jun 9, 2022Jun 13, 2022 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
12,080$38.37$463.5K350,328Jun 9, 2022Jun 13, 2022 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
19,715$48.75$961.1K384,997Mar 2, 2022Mar 3, 2022 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
105,798——404,712Mar 1, 2022Mar 3, 2022 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
10,541$49.45$521.3K298,914Mar 1, 2022Mar 3, 2022 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
38,133$47.75$1.82M309,455Jun 9, 2021Jun 11, 2021 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
22,589$47.75$1.08M347,588Jun 9, 2021Jun 11, 2021 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
9,269$42.09$390.1K282,243Mar 1, 2021Mar 1, 2021 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
87,934——370,177Mar 1, 2021Mar 2, 2021 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
8,147$41.03$334.3K291,512Feb 26, 2021Mar 1, 2021 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
17,416$41.03$714.6K299,659Feb 25, 2021Mar 1, 2021 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
10,000$30.69$306.9K282,243Jan 27, 2021Jan 28, 2021 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
10,000$27.03$270.3K292,243Jan 26, 2021Jan 28, 2021 ↗View →
TDC
TERADATA CORP /DE/
SALE
President and CEO
44,524$21.47$955.9K302,243Dec 1, 2020Dec 2, 2020 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
146,237——346,767Jun 9, 2020Jun 11, 2020 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
566,122——566,122Jun 9, 2020Jun 10, 2020 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
146,237——712,359Jun 9, 2020Jun 10, 2020 ↗View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
200,530——200,530Jun 9, 2020Jun 11, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
652——3,909May 1, 2020May 4, 2020 ↗View →
FFIV
F5, INC.
PURCHASE
EVP of Global Services
3,265——10,250May 1, 2020May 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
1,814——10,884May 1, 2020May 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
799——7,986May 1, 2020May 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
1,359$135.35$183.9K8,891May 1, 2020May 5, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
100$136.94$13.7K8,291May 1, 2020May 5, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
500$136.16$68.1K8,391May 1, 2020May 5, 2020 ↗View →
FFIV
F5, INC.
PURCHASE
EVP of Global Services
171$118.37$20.2K6,985Apr 30, 2020May 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
500$122.55$61.3K6,814Feb 3, 2020Feb 5, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
1,458$121.82$177.6K7,314Feb 3, 2020Feb 5, 2020 ↗View →
FFIV
F5, INC.
PURCHASE
EVP of Global Services
3,263——8,772Feb 1, 2020Feb 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
1,814——12,698Feb 1, 2020Feb 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
798——8,785Feb 1, 2020Feb 4, 2020 ↗View →
FFIV
F5, INC.
SALE
EVP of Global Services
651——4,561Feb 1, 2020Feb 4, 2020 ↗View →
Other insiders · TDC
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About this filer
CIK 0001719723
ROLE
President and CEO
PRIMARY
TDC
COMPANIES
3
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001719723DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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