Quick Takeaways
- William D. Porteous has 1 issuer position tracked on this page.
- Estimated disclosed ownership value: $14,956,236.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of William D. Porteous
- Location
- New York, NY
- Summary
- The estimated net worth of William D. Porteous is at least $14,956,236 dollars as of 01 Apr 2026. William D. Porteous is the Director of BlackSky Technology Inc. and owns shares of BlackSky Technology Inc. (BKSY) stock worth about $14.96M.
- Signature
- /s/ Christiana L. Lin, attorney-in-fact on behalf of William D. Porteous
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow William D. Porteous and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: BlackSky Technology Inc. ($14,956,236).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of William D. Porteous
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| BKSY, BKSY-WT | BlackSky Technology Inc. | Director | $14,956,236 | 31 Mar 2026 |
Insider Transactions Reported by William D. Porteous:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.