BetaInsiders sold $47.5M in the past 12 months.97% was sold under disclosed trading plans, 1% to cover taxes, 1% with no plan disclosed. The largest seller, Mark Frichtl (Chief Technology Officer), sold $31.1M. 31% of these sales were shares from exercising options.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why
A share of stake is shown for 0 of the 9 officers and directors who sold. 13 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: Charles Pacala, Mark Frichtl, Darien Spencer, Kenneth Gianella, Virginia Boulet, Ted Tewksbury III, Ernest Maddock, Christina Correia, Stephen Skaggs, Susan Heystee, Cyrille Jacquemet, Megan Chung and Phillip Eyler (share of stake is being verified).
Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.
Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Charles Pacala President and CEO, Director Also under a disclosed plan | 30,385 | $33.96 | n/a | n/a | Sep 14, 2026 | Sep 16, 2026 |
| Mark Frichtl Chief Technology Officer Also under a disclosed plan | 18,778 | $33.96 | n/a | n/a | Sep 14, 2026 | Sep 16, 2026 |
| Kenneth Gianella Chief Financial Officer Also under a disclosed plan | 15,686 | $33.96 | n/a | n/a | Sep 14, 2026 | Sep 16, 2026 |
| Darien Spencer Chief Operating Officer Also under a disclosed plan | 12,808 | $33.96 | n/a | n/a | Sep 14, 2026 | Sep 16, 2026 |
| Megan Chung General Counsel and Secretary Also under a disclosed plan | 11,484 | $33.96 | n/a | n/a | Sep 14, 2026 | Sep 16, 2026 |
| Cyrille Jacquemet Chief Revenue Officer | 8,896 | $33.96 | n/a | n/a | Sep 14, 2026 | Sep 16, 2026 |
"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.
Yes. Charles Pacala sold 109K shares ($3.4M) in the past 12 months, all of it under a trading plan disclosed in the filings.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 97% of sales by value ran under 10b5-1 trading plans disclosed in the filings, 1% were to cover taxes and 1% had no disclosed plan. A trading plan schedules sales in advance.
Yes. 1 officer or director reported 3 purchases in the past 12 months (Form 4 code P; rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust are not counted).
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| Mark Frichtl Chief Technology Officer | $31.1M 919K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Kenneth Gianella Chief Financial Officer | $4.5M 110K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Darien Spencer Chief Operating Officer | $4.2M 107K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Charles Pacala President and CEO, Director | $3.4M 109K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Megan Chung General Counsel and Secretary | $1.8M 61K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Cyrille Jacquemet Chief Revenue Officer | $1.4M 37K shares | Not confirmedshare of stake is being verified. Why | 53% under a disclosed plan, 47% to cover taxes |
| Susan Heystee Director | $616K 21K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Stephen Skaggs Director | $518K 15K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
| Ted Tewksbury III Director | $193K 6.8K shares | Not confirmedshare of stake is being verified. Why | Disclosed plan |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Oct 13, 2025 | Sold | Held Oct 13, 2026 | Still held | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Charles Pacala!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Charles Pacala are complete. President and CEO, Director | n/a | −109K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Charles PacalaHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Charles Pacala are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Mark Frichtl!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Mark Frichtl are complete. Chief Technology Officer | n/a | −919K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Mark FrichtlHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mark Frichtl are complete; balances and unit counts will be added when the check is finished. −39Kgifted (net of own trusts) Stock options (not counted as shares):
Estimate: options held × ($33.96 − strike price), using the most recent insider trade price on Form 4 (Sep 14, 2026), not a market close. | ||||||||||||
Darien Spencer!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Darien Spencer are complete. Chief Operating Officer | n/a | −107K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Darien SpencerHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Darien Spencer are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Kenneth Gianella!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Kenneth Gianella are complete. Chief Financial Officer | n/a | −110K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Kenneth GianellaHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Kenneth Gianella are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Virginia Boulet!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Virginia Boulet are complete. Director | n/a | 0 | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Virginia BouletHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Virginia Boulet are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Ted Tewksbury III!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ted Tewksbury III are complete. Director | n/a | −6.8K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Ted Tewksbury IIIHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ted Tewksbury III are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Ernest Maddock!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ernest Maddock are complete. Director | n/a | 0 | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Ernest MaddockHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ernest Maddock are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Christina Correia!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Christina Correia are complete. Director | n/a | 0 | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Christina CorreiaHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Christina Correia are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Stephen Skaggs!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Stephen Skaggs are complete. Director | n/a | −15K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Stephen SkaggsHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Stephen Skaggs are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Susan Heystee!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Susan Heystee are complete. Director | n/a | −21K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Susan HeysteeHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Susan Heystee are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Cyrille Jacquemet!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Cyrille Jacquemet are complete. Chief Revenue Officer | n/a | −37K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Cyrille JacquemetHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Cyrille Jacquemet are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) Stock options (not counted as shares):
Estimate: options held × ($33.96 − strike price), using the most recent insider trade price on Form 4 (Sep 14, 2026), not a market close. | ||||||||||||
Megan Chung!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Megan Chung are complete. General Counsel and Secretary | n/a | −61K | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Megan ChungHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Megan Chung are complete; balances and unit counts will be added when the check is finished. −2.1Kgifted (net of own trusts) | ||||||||||||
Phillip Eyler!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Phillip Eyler are complete. Director | n/a | 0 | n/a | n/a | ||||||||
Vesting, gifts, unvested awards and holding lines for Phillip EylerHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Phillip Eyler are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||||||||||
Holdings and share of stake for Ouster, Inc. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.
Officer and director open-market sales: $47.5M across 1,385,757 shares. Plan status and stated purpose are separate questions, and a sale can have both.
The lighter segment is sales with no plan disclosed in the filing ($1.3M), including tax-related sales outside a plan.
Sales with no 10b5-1 plan and no tax reference in the filing. $616K of it is Susan Heystee. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Susan Heystee, May 21, 2026
$11.7M of sales (24.7%) cite tax obligations in their footnotes, $11.1M of them also under a plan. Example: Megan Chung, Sep 14, 2026
1 officer or director bought shares in this period, in 3 trades(Form 4 code P, leaving out rows the filings describe as reinvested dividends, plan purchases, private deals or moves into the person's own trust). Across all their filings on record there are 24 purchase trades.
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Mark Frichtl Chief Technology Officer | 919K | $31.1M | 100% | 65% | Dec 12, 2025 to Sep 14, 2026 |
| Kenneth Gianella Chief Financial Officer | 110K | $4.5M | 100% | 9% | Jun 12, 2026 to Sep 14, 2026 |
| Darien Spencer Chief Operating Officer | 107K | $4.2M | 100% | 9% | Dec 12, 2025 to Sep 14, 2026 |
| Charles Pacala President and CEO, Director | 109K | $3.4M | 100% | 7% | Dec 12, 2025 to Sep 14, 2026 |
| Megan Chung General Counsel and Secretary | 61K | $1.8M | 100% | 4% | Oct 17, 2025 to Sep 14, 2026 |
| Cyrille Jacquemet Chief Revenue Officer | 37K | $1.4M | 53% | 3% | May 14, 2026 to Sep 14, 2026 |
| Susan Heystee Director | 21K | $616K | 0% | 1% | Dec 12, 2025 to May 21, 2026 |
| Stephen Skaggs Director | 15K | $518K | 100% | 1% | Apr 21, 2026 to Aug 6, 2026 |
| Ted Tewksbury III Director | 6.8K | $193K | 100% | 0.4% | Nov 11, 2025 to Jun 22, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $181K | $181K | $0 | $0 |
| Nov 2025 | $43K | $43K | $0 | $0 |
| Dec 2025 | $1.9M | $1.6M | $0 | $292K |
| Jan 2026 | $159K | $159K | $0 | $0 |
| Feb 2026 | $0 | $0 | $0 | $0 |
| Mar 2026 | $2.3M | $2.3M | $0 | $0 |
| Apr 2026 | $5.7M | $5.7M | $0 | $0 |
| May 2026 | $25.2M | $24.9M | $0 | $324K |
| Jun 2026 | $5.3M | $5.0M | $339K | $0 |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $3.4M | $3.4M | $0 | $0 |
| Sep 2026 | $3.3M | $3.0M | $302K | $0 |
| Oct 2026 | $0 | $0 | $0 | $0 |
More than usual: $47.5M sold, after almost none in the past 5 years. 9 insiders sold; the average is 4 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 13, 2026 Latest 12 months | 1.39M | 9 | $47.5M |
| Oct 13, 2025 1 year earlier | 247K | 7 | $5.1M |
| Oct 13, 2024 2 years earlier | 80K | 4 | $648K |
| Oct 14, 2023 3 years earlier | 100K | 7 | $903K |
| Oct 14, 2022 4 years earlier | 31K | 3 | $541K |
| Oct 14, 2021 5 years earlier | 0 | 0 | $0 |
Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.
Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Ouster, Inc. are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 323 Forms 3, 4 and 5 on record for Ouster, Inc. (SEC CIK 1816581), filed from Aug 20, 2020 to Oct 7, 2026; 67 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 13, 2026. Prices are the ones reported in each filing, often weighted averages.
Probable 1-for-10 stock split on or before Apr 20, 2023 (split date stated in a footnote). Splits aren't reported as transactions; 10 holding lines changed by exactly this ratio, so earlier share counts are restated.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".
Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.