Mark Frichtl
CIK 1847596 · Chief Technology Officer · last filed 2026-09-16
Mark Frichtl is a Chief Technology Officer who has filed 41 SEC Form 4 insider transactions across 4 companies since 2021. The most recent filing shows the insider sold $637.7K of OUST on Sep 16, 2026. Across all open-market trades the lifetime net is −$31.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.1M across reported positions.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
OUST.WS.A price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
350 TREAT AVENUE
SAN FRANCISCO, CA 94110
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| OUST | Chief Technology Officer | 318,987 | $28.43 | $9.07M | -$637.7K | 3 | 2026-09-16 |
| Ouster, Inc. (OUST.WS.A) Delisted | Chief Technology Officer | 276,510 | $0.03 | $8.2K | -$29.58M | 17 | 2026-06-16 |
| Ouster, Inc. (OUSTZ) Delisted | Chief Technology Officer | 652,571 | $0.00 | $1.3K | -$1.11M | 3 | 2025-12-16 |
| Ouster, Inc. (OUST.WS) Delisted | Chief Technology Officer | 3,343,636 | $0.09 | $300.9K | $0 | 1 | 2021-03-15 |
Recent Filings
41 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-16 | OUST | Sell (S) | −18,778 | -$637.7K | EDGAR |
| 2026-09-11 | OUST | Notice (144) | −20,353 | -$763.0K | EDGAR |
| 2026-09-04 | OUST | Gift (G) | −38,745 | $0 | EDGAR |
| 2026-08-28 | OUST | Exer (M) | +100,000 | $1.42M | EDGAR |
| 2026-06-16 | Ouster, Inc. (OUST.WS.A) Delisted | Sell (S) | −18,414 | -$714.9K | EDGAR |
| 2026-05-27 | Ouster, Inc. (OUST.WS.A) Delisted | Mixed | −334,363 | -$14.90M | EDGAR |
| 2026-05-26 | OUST | Notice (144) | −268,742 | -$9.95M | EDGAR |
| 2026-05-22 | OUST | Notice (144) | −115,684 | -$4.06M | EDGAR |
| 2026-05-15 | OUST | Notice (144) | −4,316 | -$150.5K | EDGAR |
| 2026-05-15 | Ouster, Inc. (OUST.WS.A) Delisted | Mixed | −83,659 | -$5.00M | EDGAR |
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.