PETER Y CHUNG
CIK 1239366 · last filed 2026-05-18
"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
$9.16M
Companies
8
Total Filings
74
Lifetime Open-Market Net
-$1.62B
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 |
|---|---|---|---|---|---|---|---|
| MTSI | Director | 6,781 | $379.87 | $2.58M | -$395.70M | 27 | 2026-05-18 |
| ATEN | Director | 207,298 | $31.76 | $6.58M | -$88.78M | 19 | 2026-04-24 |
| Acacia Communications, Inc. (ACIA) Delisted | Director | 14,600 | — | — | -$164.15M | 7 | 2019-05-17 |
| Casa Systems Inc (CASA) Delisted | Director | 34,124,480 | $0.04 | $1.19M | -$235.88M | 1 | 2018-04-30 |
| Ubiquiti Inc. (UBNT) Delisted | Director | 4,822,815 | — | — | -$738.25M | 10 | 2013-09-16 |
| NightHawk Radiology Holdings Inc (NHWK) Delisted | Director | 0 | $0.41 | $0 | $0 | 7 | 2010-12-23 |
| SeaBright Holdings, Inc. (SBX) Delisted | Director | 23,096 | — | — | $0 | 1 | 2009-05-21 |
| SeaBright Holdings, Inc. (SEAB) Delisted | Director | 18,611 | — | — | $0 | 1 | 2008-05-22 |
Recent Filings · Page 4 of 8
74 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2018-04-30 | Casa Systems Inc (CASA) Delisted | Sell (S) | −9,435,040 | -$235.88M | EDGAR |
| 2018-03-06 | MTSI | Grant (A) | +6,086 | $0 | EDGAR |
| 2017-06-02 | ATEN | Grant (A) | +18,359 | $0 | EDGAR |
| 2017-05-22 | Acacia Communications, Inc. (ACIA) Delisted | Grant (A) | +4,446 | $0 | EDGAR |
| 2017-03-13 | Acacia Communications, Inc. (ACIA) Delisted | Sell (S) | −1,250,000 | -$62.81M | EDGAR |
| 2017-03-07 | MTSI | Grant (A) | +2,835 | $0 | EDGAR |
| 2017-02-06 | MTSI | Sell (S) | −1,201,635 | -$55.94M | EDGAR |
| 2016-10-14 | Acacia Communications, Inc. (ACIA) Delisted | Sell (S) | −346,202 | -$33.41M | EDGAR |
| 2016-06-03 | ATEN | Grant (A) | +22,590 | $0 | EDGAR |
| 2016-05-20 | Acacia Communications, Inc. (ACIA) Delisted | Conv (C) | +2,896,329 | $0 | EDGAR |
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.