Equillium, Inc. (EQ) has 20 known insider and institutional holders on record. The largest holder is Biocon SA with 2,316,134 shares. Other notable holders include Steel Bruce D. and Connelly Stephen.
Over the last 12 months, insiders have made 23 transactions in EQ stock — 14 buys (valued at $12M) and 5 sells (valued at $196.78K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
EQ Insider Ownership
Top Holder
Biocon SA
2,316,134 shares
Buys (12 mo)
14
$12M value
Sells (12 mo)
5
$196.78K value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Biocon Sa |
10 Percent Owner |
2,316,134 |
2018-10-16 |
|
| 2 |
Steel Bruce D. |
10 Percent Owner, Officer: Chief Executive Officer |
1,750,000 |
2026-01-09 |
|
| 3 |
Connelly Stephen |
President and CSO |
1,150,000 |
2026-01-09 |
|
| 4 |
Tom Penny |
Principal Accounting Officer |
450,000 |
2026-01-09 |
|
| 5 |
Thomas Dolca |
Chief Medical Officer |
450,000 |
2021-01-13 |
|
| 6 |
Fuller Michael B |
Chief Operating Officer |
165,802 |
2006-08-01 |
|
| 7 |
Polu Krishna R |
Chief Medical Officer |
125,000 |
2019-12-12 |
|
| 8 |
Gerke Thomas A |
President & CEO |
64,039 |
2009-05-26 |
|
| 9 |
Zedelmayer Christine |
Sr. Vice President and COO |
54,688 |
2026-03-16 |
|
| 10 |
Bradbury Daniel |
10 Percent Owner, Officer: Executive Chairman |
50,000 |
2025-01-06 |
|
| 11 |
Rothman Joel |
Chief Development Officer |
49,346 |
2024-01-03 |
|
| 12 |
Betts Gene M |
Chief Financial Officer |
37,920 |
2009-05-26 |
|
| 13 |
Keyes Jason A |
Chief Financial Officer |
37,720 |
2025-01-24 |
|
| 14 |
Huber Dennis G |
Chief Technology Officer |
23,999 |
2009-05-26 |
|
| 15 |
Colabuono Peter |
Director |
20,000 |
2025-05-23 |
|
| 16 |
Pruzanski Mark |
Director |
20,000 |
2025-05-23 |
|
| 17 |
Xu Yu (katherine) |
Director |
20,000 |
2024-05-23 |
|
| 18 |
Troupin Barbara |
Director |
20,000 |
2025-05-23 |
|
| 19 |
Demski Martha J |
Director |
20,000 |
2025-05-23 |
|
| 20 |
Mcdermott Charles Douglas |
Director |
20,000 |
2025-05-23 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-13 |
Zedelmayer Christine |
Sr. Vice President and COO |
Option Exercise (Sell) |
120,312 |
$0.79 |
$94.44K |
| 2026-03-09 |
Zedelmayer Christine |
Sr. Vice President and COO |
Option Exercise (Sell) |
75,000 |
$0.79 |
$58.88K |
| 2026-02-19 |
Zedelmayer Christine |
Sr. Vice President and COO |
Informative Sell |
76,562 |
$1.74 |
$133.26K |
| 2026-02-19 |
Zedelmayer Christine |
Sr. Vice President and COO |
Option Exercise (Sell) |
109,375 |
$0.79 |
$85.86K |
| 2026-01-08 |
Tom Penny |
Principal Accounting Officer |
Informative Sell |
6,533 |
$1.29 |
$8.43K |
| 2026-01-07 |
Tom Penny |
Principal Accounting Officer |
RSU Award |
450,000 |
$1.31 |
$589.5K |
| 2026-01-07 |
Zedelmayer Christine |
Sr. Vice President and COO |
RSU Award |
500,000 |
$1.31 |
$655K |
| 2026-01-07 |
Connelly Stephen |
President and CSO |
RSU Award |
1,150,000 |
$1.31 |
$1.51M |
| 2026-01-07 |
Steel Bruce D. |
10 Percent Owner, Officer: Chief Executive Officer |
RSU Award |
1,750,000 |
$1.31 |
$2.29M |
| 2025-12-23 |
Zedelmayer Christine |
Sr. Vice President and COO |
Option Exercise (Sell) |
100,000 |
$0.79 |
$78.5K |
| 2025-12-15 |
Zedelmayer Christine |
Sr. Vice President and COO |
Informative Sell |
11,900 |
$1.31 |
$15.59K |
| 2025-12-12 |
Zedelmayer Christine |
Sr. Vice President and COO |
Informative Sell |
23,804 |
$1.34 |
$31.9K |
| 2025-11-25 |
Zedelmayer Christine |
Sr. Vice President and COO |
Informative Sell |
7,998 |
$0.95 |
$7.6K |
| 2025-08-29 |
Tom Penny |
Principal Accounting Officer |
RSU Award |
525,000 |
$1.74 |
$913.5K |
| 2025-08-29 |
Zedelmayer Christine |
Sr. Vice President and COO |
RSU Award |
725,000 |
$1.74 |
$1.26M |
| 2025-08-29 |
Connelly Stephen |
Chief Scientific Officer |
RSU Award |
1,025,000 |
$1.74 |
$1.78M |
| 2025-08-29 |
Steel Bruce D. |
10 Percent Owner, Officer: President and CEO |
RSU Award |
1,695,000 |
$1.74 |
$2.95M |
| 2025-05-21 |
Colabuono Peter |
Director |
RSU Award |
20,000 |
$0.39 |
$7.8K |
| 2025-05-21 |
Mcdermott Charles Douglas |
Director |
RSU Award |
20,000 |
$0.39 |
$7.8K |
| 2025-05-21 |
Troupin Barbara |
Director |
RSU Award |
20,000 |
$0.39 |
$7.8K |
| 2025-05-21 |
Pruzanski Mark |
Director |
RSU Award |
20,000 |
$0.39 |
$7.8K |
| 2025-05-21 |
Demski Martha J |
Director |
RSU Award |
20,000 |
$0.39 |
$7.8K |
| 2025-05-21 |
Manian Bala S |
Director |
RSU Award |
20,000 |
$0.39 |
$7.8K |
