Astrotech Corporation (ASTC) has 20 known insider and institutional holders on record. The largest holder is Leonard Braden Michael with 6,612,311 shares. Other notable holders include NEIBOER SCOTT and MARXE AUSTIN W & GREENHOUSE DAVID M.
Over the last 12 months, insiders have made 12 transactions in ASTC stock — 8 buys (valued at $31.24K) and 1 sells (valued at $53.44K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
ASTC Insider Ownership
Top Holder
Leonard Braden Michael
6,612,311 shares
Buys (12 mo)
8
$31.24K value
Sells (12 mo)
1
$53.44K value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Leonard Braden Michael |
Director |
6,612,311 |
2022-12-02 |
|
| 2 |
Neiboer Scott |
10 Percent Owner |
1,753,829 |
2009-03-26 |
|
| 3 |
Marxe Austin W & Greenhouse David M |
10 Percent Owner |
1,196,463 |
2007-11-08 |
|
| 4 |
Royston James D |
President |
300,000 |
2009-11-24 |
|
| 5 |
Lord Lance W |
Chief Executive Officer |
275,000 |
2009-11-24 |
|
| 6 |
Oliva John A |
Director |
225,800 |
2015-04-09 |
|
| 7 |
Readdy William F |
Director |
195,104 |
2016-12-13 |
|
| 8 |
Porter John |
Chief Financial Officer |
190,000 |
2011-09-16 |
|
| 9 |
Cantwell Ronald W |
Director |
182,324 |
2022-04-18 |
|
| 10 |
Pickens Thomas Boone Iii |
CEO |
181,385 |
2025-05-16 |
|
| 11 |
Mellacheruvu Rajesh K |
Chief Operating Officer |
117,671 |
2021-03-30 |
|
| 12 |
Adams Mark |
Director |
113,003 |
2018-12-18 |
|
| 13 |
Manning Sha-chelle |
Director |
85,000 |
2017-05-11 |
|
| 14 |
White Jr. Don Murphree |
Sr VP, GM Astrotech Space Ops. |
83,900 |
2014-04-10 |
|
| 15 |
Bain Michael E |
Senior Vice President and COO |
70,115 |
2006-12-14 |
|
| 16 |
Harrington Brian K |
Senior Vice President and CFO |
58,000 |
2008-07-22 |
|
| 17 |
Kearney Michael E |
Director, CEO & President |
41,000 |
2006-08-10 |
|
| 18 |
Humphrey Michael R. |
Director |
40,000 |
2017-05-11 |
|
| 19 |
Hinojosa Jaime |
CFO |
30,062 |
2024-10-15 |
|
| 20 |
Williamson Barry A |
Director |
27,000 |
2008-07-22 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-10-27 |
Bartley Scott |
Interim CFO, Treasurer and Sec |
Unknown |
- |
- |
- |
| 2025-10-03 |
Leonard Braden Michael |
10 Percent Owner |
Informative Sell |
9,166 |
$5.83 |
$53.44K |
| 2025-08-13 |
Badugu Nihanth |
Chief Operating Officer |
Unknown |
840 |
$11.51 |
$9.67K |
| 2025-05-22 |
Canas Jennifer |
Chief Financial Officer |
RSU Award |
5,250 |
$5.95 |
$31.24K |
| 2025-05-22 |
Canas Jennifer |
Chief Financial Officer |
RSU Award |
5,250 |
- |
- |
| 2025-05-22 |
Canas Jennifer |
Chief Financial Officer |
Unknown |
2,010 |
$11.51 |
$23.14K |
| 2025-05-14 |
Halinski John William |
Director |
RSU Award |
3,000 |
- |
- |
| 2025-05-14 |
Winn Charles Arch |
Director |
RSU Award |
3,000 |
- |
- |
| 2025-05-14 |
Wilkinson Thomas Wiley |
Director |
RSU Award |
3,000 |
- |
- |
| 2025-05-14 |
Stober Eric |
Director |
RSU Award |
3,000 |
- |
- |
| 2025-05-14 |
Pickens Thomas Boone Iii |
CEO |
RSU Award |
50,000 |
- |
- |
| 2025-05-14 |
Mcfarland Robert N |
Director |
RSU Award |
3,000 |
- |
- |
