Michael Thomas Heffernan
CIK 1448914 · Chairman, President and CEO · last filed 2026-06-17
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$8.40M
Companies
12
Total Filings
121
Lifetime Open-Market Net
-$25.71M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ENGNW | Director | — | $0.36 | — | $0 | 2 | 2026-06-17 |
| AVTX | Director | — | $19.52 | — | $0 | 3 | 2026-06-04 |
| TRVI | Director | 3,851 | $18.43 | $71.0K | $25.0K | 10 | 2026-06-04 |
| BHVN | Director | 15,178 | $13.77 | $209.0K | $0 | 11 | 2025-05-07 |
| COLL | Director | 213,371 | $35.90 | $7.66M | -$15.14M | 17 | 2025-02-12 |
| SYNLOGIC, INC. (SYBX) Delisted | Director | — | $0.69 | — | $0 | 4 | 2023-06-26 |
| AKBA | Director | 48,586 | $1.27 | $61.7K | $0 | 4 | 2021-06-03 |
| ESPR | Director | 126,623 | $3.18 | $402.7K | -$10.59M | 31 | 2019-08-13 |
| KERYX BIOPHARMACEUTICALS INC (KERX) Delisted | Director | 0 | — | — | $0 | 4 | 2018-12-13 |
| Ocata Therapeutics, Inc. (OCAT) Delisted | Director | 0 | — | — | $0 | 7 | 2016-02-11 |
| CORNERSTONE THERAPEUTICS INC (CRTX) Delisted | Director | — | $1.95 | — | $0 | 7 | 2014-02-04 |
| CORNERSTONE THERAPEUTICS INC (CRTXD) Delisted | Director | — | — | — | $0 | 1 | 2008-11-04 |
Recent Filings · Page 3 of 13
121 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-12-27 | COLL | Mixed | — | -$186.0K | EDGAR |
| 2022-12-21 | COLL | Mixed | — | -$583.1K | EDGAR |
| 2022-12-14 | COLL | Mixed | — | -$1.33M | EDGAR |
| 2022-10-12 | BHVN | Tax (F) | −9,699 | -$72.7K | EDGAR |
| 2022-10-05 | — | Mixed | +19,370 | $31.4K | |
| 2022-10-03 | BHVN | Disp (D) | — | $0 | EDGAR |
| 2022-07-01 | TRVI | Grant (A) | — | $0 | EDGAR |
| 2022-06-23 | TRVI | Grant (A) | — | $0 | EDGAR |
| 2022-06-13 | SYNLOGIC, INC. (SYBX) Delisted | Grant (A) | — | $0 | EDGAR |
| 2022-05-23 | COLL | Grant (A) | +14,035 | $0 | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.