BetaInsiders sold $44.8M in the past 12 months.0.4% was sold under disclosed trading plans, 93% to cover taxes, 6% with no plan disclosed. The largest seller, William Ballhaus (Chairman, President & CEO, Director), sold $37.7M.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 8 officers and directors who sold. 12 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: William Ballhaus, David Farnsworth, Stuart Kupinsky, Orlando Carvalho, Howard Lance, Steven Ratner, Barry Nearhos, Lisa Disbrow, Douglas Munro, Debora Plunkett, Gerard Demuro and Jean Bua (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 |
|---|---|---|---|---|---|---|
| Stuart Kupinsky EVP, CLO & Corp Sec | 1,000 | $86.52 | n/a | n/a | Sep 21, 2026 | Sep 23, 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.
JANA Partners Management, LP sold $149M in the past 12 months. Large shareholders and the funds or companies that board members represent are not part of management, so they are left out of the figures above.
Yes. William Ballhaus sold 410K shares ($37.7M) in the past 12 months, none 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: 0.4% of sales by value ran under 10b5-1 trading plans disclosed in the filings, 93% were to cover taxes and 6% had no disclosed plan. A trading plan schedules sales in advance.
No. Officers and directors reported no purchases in the past 12 months.
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| William Ballhaus Chairman, President & CEO, Director | $37.7M 410K shares | Not confirmedshare of stake is being verified. Why | To cover taxes |
| David Farnsworth EVP, CFO | $2.7M 27K shares | Not confirmedshare of stake is being verified. Why | To cover taxes |
| Howard Lance Director | $1.4M 14K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Steven Ratner EVP, CHRO | $1.2M 13K shares | Not confirmedshare of stake is being verified. Why | 54% to cover taxes 46% no plan disclosed |
| Stuart Kupinsky EVP, CLO & Corp Sec | $767K 8K shares | Not confirmedshare of stake is being verified. Why | 24% under a disclosed plan, 76% to cover taxes |
| Orlando Carvalho Director | $626K 7K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Douglas Munro SVP, CAO | $311K 3.5K shares | Not confirmedshare of stake is being verified. Why | 69% to cover taxes 31% no plan disclosed |
| Debora Plunkett Director | $126K 1.7K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
Outside holder, reported separately: JANA Partners Management, LP (an outside shareholder, not part of management). Sold $149M (1.85M shares) from Nov 6, 2025 to Mar 4, 2026. Latest filing
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 |
|---|---|---|---|---|
William Ballhaus!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for William Ballhaus are complete. Chairman, President & CEO, Director | n/a | −410K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for William BallhausHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for William Ballhaus are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
David Farnsworth!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for David Farnsworth are complete. EVP, CFO | n/a | −27K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for David FarnsworthHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for David Farnsworth are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Stuart Kupinsky!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 Stuart Kupinsky are complete. EVP, CLO & Corp Sec | n/a | −8K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Stuart KupinskyHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Stuart Kupinsky are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Orlando Carvalho!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 Orlando Carvalho are complete. Director | n/a | −7K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Orlando CarvalhoHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Orlando Carvalho are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Howard Lance!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 Howard Lance are complete. Director | n/a | −14K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Howard LanceHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Howard Lance are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Steven Ratner!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Steven Ratner are complete. EVP, CHRO | n/a | −13K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Steven RatnerHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Steven Ratner are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Barry Nearhos!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 Barry Nearhos are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Barry NearhosHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Barry Nearhos are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Lisa Disbrow!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 Lisa Disbrow are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Lisa DisbrowHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Lisa Disbrow are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Douglas Munro!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. See the filing Sales and other transactions for Douglas Munro are complete. SVP, CAO | n/a | −3.5K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Douglas MunroHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Douglas Munro are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Debora Plunkett!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 Debora Plunkett are complete. Director | n/a | −1.7K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Debora PlunkettHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Debora Plunkett are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Gerard Demuro!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 Gerard Demuro are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Gerard DemuroHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Gerard Demuro are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jean Bua!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 Jean Bua are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jean BuaHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jean Bua 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 Mercury Systems 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: $44.8M across 483,791 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 ($44.6M), including tax-related sales outside a plan.
Sales with no 10b5-1 plan and no tax reference in the filing. $1.4M of it is Howard Lance. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Howard Lance, May 26, 2026
$41.9M of sales (93.4%) cite tax obligations in their footnotes. Example: William Ballhaus, Aug 26, 2026
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| William Ballhaus Chairman, President & CEO, Director | 410K | $37.7M | 0% | 84% | Aug 17, 2026 to Aug 26, 2026 |
| David Farnsworth EVP, CFO | 27K | $2.7M | 0% | 6% | Apr 16, 2026 to Aug 20, 2026 |
| Howard Lance Director | 14K | $1.4M | 0% | 3% | Feb 25, 2026 to May 26, 2026 |
| Steven Ratner EVP, CHRO | 13K | $1.2M | 0% | 3% | May 11, 2026 to Sep 3, 2026 |
| Stuart Kupinsky EVP, CLO & Corp Sec | 8K | $767K | 24% | 2% | Feb 17, 2026 to Sep 21, 2026 |
| Orlando Carvalho Director | 7K | $626K | 0% | 1% | May 12, 2026 to May 12, 2026 |
| Douglas Munro SVP, CAO | 3.5K | $311K | 0% | 0.7% | Nov 12, 2025 to Aug 20, 2026 |
| Debora Plunkett Director | 1.7K | $126K | 0% | 0.3% | Nov 7, 2025 to Nov 7, 2025 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $223K | $0 | $0 | $223K |
| Dec 2025 | $0 | $0 | $0 | $0 |
| Jan 2026 | $0 | $0 | $0 | $0 |
| Feb 2026 | $670K | $0 | $240K | $430K |
| Mar 2026 | $0 | $0 | $0 | $0 |
| Apr 2026 | $308K | $0 | $308K | $0 |
| May 2026 | $1.7M | $0 | $0 | $1.7M |
| Jun 2026 | $0 | $0 | $0 | $0 |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $41.4M | $95K | $41.3M | $33K |
| Sep 2026 | $425K | $87K | $0 | $338K |
| Oct 2026 | $0 | $0 | $0 | $0 |
More than usual: $44.8M sold, after almost none in the past 5 years. 8 insiders sold; the average is 6 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 13, 2026 Latest 12 months | 484K | 8 | $44.8M |
| Oct 13, 2025 1 year earlier | 67K | 6 | $4.1M |
| Oct 13, 2024 2 years earlier | 37K | 10 | $1.4M |
| Oct 14, 2023 3 years earlier | 33K | 6 | $1.7M |
| Oct 14, 2022 4 years earlier | 64K | 6 | $3.3M |
| Oct 14, 2021 5 years earlier | 51K | 3 | $4.0M |
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 Mercury Systems 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 964 Forms 3, 4 and 5 on record for Mercury Systems Inc (SEC CIK 1049521), filed from Jan 29, 1998 to Sep 23, 2026; 50 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. 38 older filings exist only on paper and could not be read.
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".
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