Reporting owner · CIK 0001178579
Tang Kevin
Visual SEC Form 4 history across 3 companies, 8 transactions and 3 filings.
10%Boundless Bio, Inc.
Open-market mix
86%buys
Latest insider transactions
Form 4 filings from available history. Click any column to sort; click it again to flip the order.
| ID | Ticker | Insider | Role | Type | Shares | Value | Code | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|
| #117407 | BOLD | Tang Kevin | 10% | sale | 18.3k | -$5.43M | S | 08/28 | 08/26 |
| #180413 | AUPH | Tang Kevin | DIR | buy | 100k | $80.9M | P | 03/04/2025 | 03/04/2025 |
| #180412 | AUPH | Tang Kevin | DIR | buy | 500k | $396M | P | 03/04/2025 | 03/04/2025 |
| #180411 | AUPH | Tang Kevin | DIR | buy | 148k | $118M | P | 03/04/2025 | 03/04/2025 |
| #180410 | AUPH | Tang Kevin | DIR | buy | 351k | $282M | P | 03/04/2025 | 03/03/2025 |
| #180409 | AUPH | Tang Kevin | DIR | buy | 100k | $80.2M | P | 03/04/2025 | 03/03/2025 |
| #180408 | AUPH | Tang Kevin | DIR | buy | 399k | $313M | P | 03/04/2025 | 02/28/2025 |
| #156933 | OMIC | Tang Kevin | 10% | return | 372k | — | D | 02/28/2025 | 02/21/2025 |
Latest Form 4 facts
Quick context from source filings
Open-market buy performance
90-day forward return on this insider's open-market purchases
Forward return is not available yet
We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for some of their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
1 observations · Aug 26, 2026 – Aug 26, 2026. Window ends at the latest available report, not today.
Selected observation · Aug 26, 20262,840,635 shares reported
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| Aug 26, 2026 | 2,840,635 | Aug 28, 2026 | View transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Monthly open-market activity
Reported purchase and sale transaction counts
Buys Sells
Net value flow
Buys minus sells
Feb 25
$3.1M
Mar 25
$9.6M
Aug 26
−$54.4K
Transaction texture
Ownership and ticket size
Average P/S size$1.8M
Median P/S size$1.2M
Direct0
Indirect8
Aug 26, 2026sale
Filing-only signals
Deterministic matches in this insider's history
Tang Kevin Insider Activity FAQ
SEC Form 4 context
Who is Tang Kevin?
Tang Kevin is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001178579.
Which companies has Tang Kevin reported transactions for?
Boundless Bio, Inc., Aurinia Pharmaceuticals Inc., Singular Genomics Systems, Inc.
When was Tang Kevin's latest insider buy?
buy at Aurinia Pharmaceuticals Inc. on Mar 04, 2025 valued at $809,000.
When was Tang Kevin's latest insider sale?
sale at Boundless Bio, Inc. on Aug 26, 2026 valued at $54,351.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.