SEC Form 4 · Updated Daily
ASTC
— ASTROTECH CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| MARXE AUSTIN W & GREENHOUSE DAVID M | 10%+ Owner | 1,196,463 | 2007-11-06 | S |
| NEIBOER SCOTT | Reporting Owner | 1,071,344 | 2009-09-30 | J |
| Winn Interests, Ltd. | 10%+ Owner | 523,386 | 2018-10-09 | — |
| Porter John | Officer | 350,000 | 2011-06-02 | P |
| Royston James D | Officer | 300,000 | 2009-11-13 | A |
| Lord Lance W | Director | 275,000 | 2009-11-13 | A |
| Oliva John A | Director | 260,000 | 2015-04-07 | A |
| WILLIAMSON BARRY A | Director | 225,000 | 2008-07-18 | A |
| Readdy William F | Director | 195,104 | 2016-12-09 | D |
| CANTWELL RONALD W | Director | 182,324 | 2022-04-14 | A |
| Pickens Thomas Boone III | Director | 181,385 | 2025-05-14 | A |
| HARRINGTON BRIAN K | Officer | 165,000 | 2008-07-18 | A |
| Adams Mark | Director | 113,003 | 2018-12-17 | A |
| Manning Sha-Chelle | Director | 106,710 | 2016-03-11 | A |
| White Jr. Don Murphree | Officer | 83,900 | 2013-03-18 | S |
| Mellacheruvu Rajesh K | Officer | 70,499 | 2020-12-23 | F |
| BAIN MICHAEL E | Officer | 70,114.81 | 2006-12-11 | I |
| Humphrey Michael R. | Director | 50,000 | 2016-09-07 | A |
| Wilkinson Tom | Director | 32,254 | 2026-09-30 | A |
| Wilkinson Thomas Wiley | Director | 23,862 | 2025-05-14 | A |
| MCFARLAND ROBERT N | Director | 22,292 | 2026-09-30 | A |
| Stober Eric | Director | 21,127 | 2026-09-30 | A |
| Becker James Frank | Director | 16,121 | 2024-05-29 | P |
| Russler Daniel T Jr | Director | 14,904 | 2024-03-15 | P |
| Winn Charles Arch | Director | 14,431 | 2026-09-30 | A |
| Halinski John William | Director | 13,542 | 2026-09-30 | A |
| Hinojosa Jaime | Officer | 7,881 | 2023-05-23 | P |
| Canas Jennifer | Officer | 5,250 | 2025-05-22 | A |
| Badugu Nihanth | Officer | 5,000 | 2026-07-22 | A |
| Kreps Matthew | Director | 3,264 | 2026-09-30 | A |
| DAVID EDWARD E JR | Director | 1,000 | 2006-06-01 | I |
| Leonard Braden Michael | 10%+ Owner | 0 | 2025-10-03 | S |
| Bartley Scott | Officer | 0 | 2025-10-27 | — |
| Polk Ryan | Officer | 0 | 2025-01-14 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-30 | Wilkinson Tom | Grant / award | 1,331 | $0.00 | 32,254 |
| 2026-09-30 | MCFARLAND ROBERT N | Grant / award | 1,331 | $0.00 | 22,292 |
| 2026-09-30 | Stober Eric | Grant / award | 1,473 | $0.00 | 21,127 |
| 2026-09-30 | Halinski John William | Grant / award | 1,331 | $0.00 | 13,542 |
| 2026-09-30 | Winn Charles Arch | Grant / award | 1,331 | $0.00 | 14,431 |
| 2026-09-30 | Kreps Matthew | Grant / award | 1,114 | $0.00 | 3,264 |
| 2026-09-01 | Winn Charles Arch | Grant / award | 2,150 | $0.00 | 13,100 |
| 2026-09-01 | Winn Charles Arch | Grant / award | 2,150 | $0.00 | 13,100 |
| 2026-07-22 | Badugu Nihanth | Grant / award | 5,000 | $0.00 | 5,000 |
| 2026-07-22 | Badugu Nihanth | Grant / award | 5,000 | $0.00 | 5,000 |
| 2026-07-16 | Stober Eric | Grant / award | 2,150 | $0.00 | 18,487 |
| 2026-07-16 | Halinski John William | Grant / award | 2,150 | $0.00 | 11,156 |
| 2026-07-16 | Kreps Matthew | Grant / award | 2,150 | $0.00 | 2,150 |
| 2026-07-16 | Halinski John William | Grant / award | 2,150 | $0.00 | 12,211 |
| 2026-07-16 | Stober Eric | Grant / award | 2,150 | $0.00 | 19,654 |
| 2026-07-09 | Wilkinson Tom | Grant / award | 1,055 | $0.00 | 30,923 |
| 2026-07-09 | Stober Eric | Grant / award | 1,167 | $0.00 | 19,654 |
| 2026-07-09 | MCFARLAND ROBERT N | Grant / award | 1,055 | $0.00 | 11,205 |
| 2026-07-09 | Winn Charles Arch | Grant / award | 1,055 | $0.00 | 10,950 |
| 2026-07-09 | Halinski John William | Grant / award | 1,055 | $0.00 | 12,211 |
| 2026-07-09 | MCFARLAND ROBERT N | Grant / award | 1,055 | $0.00 | 20,961 |
| 2026-04-14 | MCFARLAND ROBERT N | Grant / award | 6,006 | $0.00 | 19,906 |
| 2026-04-14 | Stober Eric | Grant / award | 6,006 | $0.00 | 16,337 |
| 2026-04-14 | Winn Charles Arch | Grant / award | 6,006 | $0.00 | 9,895 |
| 2026-04-14 | Wilkinson Tom | Grant / award | 6,006 | $0.00 | 29,868 |
| 2026-04-14 | Halinski John William | Grant / award | 6,006 | $0.00 | 9,006 |
| 2025-10-27 | Bartley Scott | — | — | — | 0 |
| 2025-10-03 | Leonard Braden Michael | Open-market sale | 220,410 | $7.13 | 0 |
| 2025-05-22 | Canas Jennifer | Grant / award | 5,250 | $0.00 | 5,250 |
| 2025-05-22 | Canas Jennifer | Grant / award (derivative) | 5,250 | $0.00 | 5,250 |
| 2025-05-14 | Wilkinson Thomas Wiley | Grant / award | 3,000 | $0.00 | 23,862 |
| 2025-05-14 | Winn Charles Arch | Grant / award | 3,000 | $0.00 | 3,889 |
| 2025-05-14 | Halinski John William | Grant / award | 3,000 | $0.00 | 3,000 |
| 2025-05-14 | Pickens Thomas Boone III | Grant / award | 50,000 | $0.00 | 181,385 |
| 2025-05-14 | Stober Eric | Grant / award | 3,000 | $0.00 | 10,331 |
| 2025-05-14 | MCFARLAND ROBERT N | Grant / award | 3,000 | $0.00 | 13,900 |
| 2025-05-14 | Halinski John William | Grant / award | 6,006 | $0.00 | 9,006 |
| 2025-01-14 | Polk Ryan | — | — | — | 0 |
| 2024-12-13 | Winn Charles Arch | — | — | — | 11,000 |
| 2024-12-13 | Winn Charles Arch | — | — | — | 48 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.