Insider · CIK 0001719723
Stephen McMillan
Files at LUMN (Lumen Technologies, Inc.), TDC (TERADATA CORP /DE/). First filing Nov 8, 2024, latest Sep 17, 2026.
Stephen McMillan files SEC Form 4 as CEO, president and director at TDC (TERADATA CORP /DE/), and also at LUMN (Lumen Technologies, Inc.). Since Nov 8, 2024, Stephen McMillan has reported 0 open-market buys worth $0 and 3 open-market sells worth $2.4M, the latest filed on Sep 17, 2026.
A track record needs three past buys with six months of prices behind them; Stephen McMillan has 0, so none is measured yet.
The newest scored trade: sold $300k of TDC on Sep 15, 2026, filed Sep 17, 2026, scored 27 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 2 sells worth $1.8M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
TDC: TERADATA CORP /DE/
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 27Weak | TERADATA CORP /DE/ | $300k 10,000 shares | -1% | +44% from low-22% from high | |
| 58Moderate | TERADATA CORP /DE/ | $1.5M 50,000 shares | -7% | +61% from low-18% from high | |
| 32Weak | TERADATA CORP /DE/ | $600k 20,000 shares | -5% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Nov 8, 2024 | TDC TERADATA CORPORATION | 20,000 0.02% of outstanding | $586k | Nov 8, 2024 | none |
Transactions
Every row this insider has filed, 13 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | TDC TERADATA CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -10,000 | $30.02 | $300k | 752,446 | 26 d ago |
| Mar 1, 2026 | TDC TERADATA CORP /DE/ | AGrant or award Common Stock | +206,271 | $0.00 | $0 | 809,052 | Mar 10, 2026 |
| Mar 6, 2026 | TDC TERADATA CORP /DE/ | FTax withholding Common Stock | -22,230 | $28.02 | $623k | 786,822 | Mar 10, 2026 |
| Mar 9, 2026 | TDC TERADATA CORP /DE/ | JOther Common Stock | -4,376 | $0.00 | $0 | 782,446 | Mar 10, 2026 |
| Mar 3, 2026 | TDC TERADATA CORP /DE/ | FTax withholding Common Stock | -40,319 | $30.36 | $1.2M | 602,781 | Mar 5, 2026 |
| Feb 27, 2026 | TDC TERADATA CORP /DE/ | FTax withholding Common Stock | -20,090 | $31.49 | $633k | 643,100 | Mar 3, 2026 |
| Feb 26, 2026 | TDC TERADATA CORP /DE/ | SOpen-market sale Common Stock | -50,000 | $30.26 | $1.5M | 663,190 | Feb 27, 2026 |
| Feb 11, 2026 | TDC TERADATA CORP /DE/ | AGrant or award Common Stock | +141,402 | $0.00 | $0 | 700,527 | Feb 13, 2026 |
| Feb 11, 2026 | TDC TERADATA CORP /DE/ | FTax withholding Common Stock | -74,121 | $37.88 | $2.8M | 626,406 | Feb 13, 2026 |
| Feb 11, 2026 | TDC TERADATA CORP /DE/ | AGrant or award Common Stock | +105,130 | $0.00 | $0 | 731,536 | Feb 13, 2026 |
| Feb 11, 2026 | TDC TERADATA CORP /DE/ | FTax withholding Common Stock | -18,346 | $37.88 | $695k | 713,190 | Feb 13, 2026 |
| May 14, 2025 | LUMN Lumen Technologies, Inc. | AGrant or award Common Stock | +51,394 | $0.00 | $0 | 51,394 | May 16, 2025 |
| Nov 8, 2024 | TDC TERADATA CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -20,000 | $30.00 | $600k | 373,579 | Nov 8, 2024 |
Questions about Stephen McMillan
Answered from the filings on this page, as of the latest one.
Is Stephen McMillan buying or selling?
In the last 12 months Stephen McMillan reported 0 open-market buys worth $0 and 2 open-market sells worth $1.8M on SEC Form 4; the latest was sold $300k of TDC on Sep 15, 2026. Grants, option exercises and tax withholding are not counted.
How did Stephen McMillan's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Stephen McMillan has 0.
Where does Stephen McMillan file Form 4?
Stephen McMillan has filed Form 4 at TDC (TERADATA CORP /DE/) as President and CEO; LUMN (Lumen Technologies, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.