← United States · Coverage record
US · SEC FORM 4
TERADATA CORP /DE/
TDC · NYSE · CIK 0000816761 · Technology · Software—Infrastructure
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
32 Form 4 transaction lines observed in the same window
10 sales · 22 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 9 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2020-03-12 · Culhane Mark.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 14,481,778
- Previous report
- 15,405,722
- Avg daily volume
- 1,378,266
- Days to cover
- 10.5
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2020-03-12 | Culhane Mark | Purchase (P) | Common Stock | 1,200 | USD 18.92 | USD 22,704 | SEC filing ↗ |
| 2020-03-11 | Culhane Mark | Purchase (P) | Common Stock | 8,950 | USD 19.78 | USD 177,042 | SEC filing ↗ |
Form 4 evidence
75 transaction lines in the latest 365-day window; 488 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | MCMILLAN STEPHEN | Sale (S) | Common Stock | 10,000 | USD 30.02 | USD 300,200 | SEC filing ↗ |
| 2026-09-15 | Hutchinson Michael D | Sale (S) | Common Stock | 48,077 | USD 30.00 | USD 1,442,310 | SEC filing ↗ |
| 2026-09-01 | Fisher Melissa B | Award / grant (A) | Common Stock | 963 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | MCMILLAN STEPHEN | Sale (S) | Common Stock | 10,000 | USD 30.02 | USD 300,200 | SEC filing ↗ |
| 2026-09-15 | Hutchinson Michael D | Sale (S) | Common Stock | 48,077 | USD 30.00 | USD 1,442,310 | SEC filing ↗ |
| 2026-09-01 | Fisher Melissa B | Award / grant (A) | Common Stock | 963 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | Nelson Kimberly K. | Award / grant (A) | Common Stock | 2,197 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | McElhatton Todd | Award / grant (A) | Common Stock | 2,197 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | Gianoni Michael P | Award / grant (A) | Common Stock | 2,197 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | Fisher Melissa B | Award / grant (A) | Common Stock | 2,197 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-14 | Bacus Lisa R | Award / grant (A) | Common Stock | 2,197 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-01 | Leukert Bernd | Award / grant (A) | Common Stock | 8,330 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-15 | Rogers Scot Frazier | Tax withholding (F) | Common Stock | 23,513 | USD 33.62 | USD 790,507 | SEC filing ↗ |
| 2026-06-08 | CHOU TIMOTHY C K | Sale (S) | Common Stock | 5,657 | USD 33.72 | USD 190,754 | SEC filing ↗ |
| 2026-06-01 | Petley Richard J | Sale (S) | Common Stock | 17,227 | USD 35.00 | USD 602,955 | SEC filing ↗ |
| 2026-05-22 | McElhatton Todd | Sale (S) | Common Stock | 15,000 | USD 33.47 | USD 502,050 | SEC filing ↗ |
| 2026-05-19 | Arora Sumeet | Sale (S) | Common Stock | 15,000 | USD 33.00 | USD 495,000 | SEC filing ↗ |
| 2026-05-18 | Ederer John | Tax withholding (F) | Common Stock | 13,355 | USD 32.77 | USD 437,643 | SEC filing ↗ |
| 2026-05-18 | Arora Sumeet | Tax withholding (F) | Common Stock | 35,680 | USD 32.77 | USD 1,169,234 | SEC filing ↗ |
| 2026-05-14 | SCHWARZ JOHN | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | Olsen Joanne Beth | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | Nelson Kimberly K. | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | McElhatton Todd | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | Gianoni Michael P | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | Fisher Melissa B | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | CHOU TIMOTHY C K | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-14 | Bacus Lisa R | Award / grant (A) | Common Stock | 8,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-13 | Petley Richard J | Tax withholding (F) | Common Stock | 1,829 | USD 32.70 | USD 59,808 | SEC filing ↗ |
| 2026-05-12 | MCMILLAN STEPHEN | Sale (S) | Common Stock | 20,000 | USD 31.71 | USD 634,200 | SEC filing ↗ |
| 2026-05-07 | Petley Richard J | Sale (S) | Common Stock | 34,317 | USD 30.84 | USD 1,058,336 | SEC filing ↗ |
| 2026-05-07 | Arora Sumeet | Sale (S) | Common Stock | 2,645 | USD 30.84 | USD 81,572 | SEC filing ↗ |
| 2026-03-09 | MCMILLAN STEPHEN | J (J) | Common Stock | 4,376 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-06 | Petley Richard J | Tax withholding (F) | Common Stock | 3,180 | USD 28.02 | USD 89,104 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | TDC |
| CIK | 0000816761 |
| Sector | Technology |
| Industry | Software—Infrastructure Yahoo Finance |
| SEC SIC | 7372 Services-Prepackaged Software |
| Exchange | NYSE |
Data coverage
| Local Form 4 history | 488 transaction lines from 2020-02-10 to 2026-09-15 3 P purchase lines · 107 S sale lines · 378 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.