Mark Thierer
CIK 1334925 · Interim Chief Exec Officer · last filed 2026-01-23
"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.
Loading insider history…
Disclosed Exposure
$1.04M
Companies
7
Total Filings
53
Lifetime Open-Market Net
-$70.02M
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 |
|---|---|---|---|---|---|---|---|
| PIIIW | Director | 21,182 | $0.02 | $356 | $0 | 5 | 2026-01-23 |
| Discover Financial Services (DFS) Delisted | Director | 24,563 | $200.05 | $4.91M | $0 | 6 | 2023-05-15 |
| XERS | Director | — | $6.79 | — | $0 | 2 | 2020-06-04 |
| XRAY | Interim Chief Exec Officer | 103,198 | $10.09 | $1.04M | $5.08M | 5 | 2018-02-27 |
| Discover Financial Services (DFSpB) Delisted | Director | 12,135 | — | — | $0 | 4 | 2017-05-12 |
| Catamaran Corp (CTRX) Delisted | President & CEO | 0 | — | — | -$23.68M | 12 | 2015-07-23 |
| Catamaran Corp (SXCI) Delisted | President & CEO | 95,408 | — | — | -$51.43M | 19 | 2012-06-06 |
Recent Filings · Page 6 of 6
53 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2009-06-17 | Catamaran Corp (SXCI) Delisted | Mixed | — | -$824.5K | EDGAR |
| 2009-06-08 | Catamaran Corp (SXCI) Delisted | Grant (A) | — | $0 | EDGAR |
| 2008-08-27 | Catamaran Corp (SXCI) Delisted | — | — | $0 | EDGAR |
Showing 51–53 of 53
Prev
Page 6 of 6
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.