Latest filingSep 05, 2026Most recent Form 4
ONTO
ONTO INNOVATION INC.
Insider activity for last month from 08/05 to 09/05. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$02 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period3transactions
- F · Tax withholding · dominant3 · 100%
Activity by reported role
A joint filing can contribute to multiple roles3transactions
- Chief financial officer · dominant2 · 67%
- SVP1 · 33%
Distinct insiders active
Reporting-owner CIKs by month · peak Sep 2026 (2)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeRoberts Brian KCommon Stock · Direct
21,032Sep 02, 2026
Chen ShirleyCommon Stock · Direct
14,001Sep 02, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 05 → Sep 05
LessMore
Top insiders
By absolute net value across the selected period- RK-$1.6M
- CS-$385.9k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
No filing-only signal badges matched this period.
ONTO transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| ONTO | ROBERTS BRIAN K | CFO | withholding | 3.23k | -$82.4M | F | — | — | 09/05 | 09/02 |
| ONTO | Chen Shirley | SVP | withholding | 1.51k | -$38.5M | F | — | — | 09/04 | 09/02 |
| ONTO | ROBERTS BRIAN K | CFO | withholding | 3.23k | -$82.4M | F | — | — | 09/04 | 09/02 |
ONTO INNOVATION INC. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at ONTO INNOVATION INC.?
ROBERTS BRIAN K, Chen Shirley.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.