Every officer and director reconciles for this period.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
What stands out
Danijela Stojanovic sold 28K shares (79% of starting holdings), but 180K more vested, so the stake grew (from 36K to 188K).Largest sale, May 20, 2026
Tax withholding outweighed market sales: the company withheld $1.6M of officers' and directors' shares for taxes, against $129K sold on the open market. The largest was Marshall Beard ($946K withheld).Largest withholding, Oct 24, 2025
Percentages cover all 9 officers and directors. Disclosed company stock is not an insider's whole wealth.
Who sold, and how much of their stake
Officers and directors, past 12 months. Each bar is the insider's vested stake at the start of the period (Oct 8, 2025). The gold part is what they sold.
SoldRest of starting stakeAdded during the period
Danijela Stojanovic
Interim CFO
79% · $129K25% planned
Selling by month
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.
Disclosed planTo cover taxesNo plan disclosed
Outside holders, reported separately
Sachin Jaitly (for the outside shareholder represented on the board) sold $354K 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.
Common questions
Why are Gemini Space Station, Inc. insiders selling?
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 25% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 75% were to cover taxes. A trading plan schedules sales in advance.
Are any Gemini Space Station, Inc. insiders buying?
No. Officers and directors reported no purchases in the past 12 months.
How much of their stake did Gemini Space Station, Inc. insiders sell?
Less than 0.1% overall. As a group they ended with more shares than they started with. The biggest individual seller, Danijela Stojanovic, sold shares equal to 79% of starting holdings, but more vested, so the stake grew. That covers the 12 months to Oct 8, 2026 and counts vested shares reported on SEC Forms 3, 4 and 5, which is not an insider's whole wealth.
The evidence
Who sold1 officer or director: amount, % of holdings, trading plan
The full ownership picture9 of 9 insiders fully reconciled · 9 officers and directors
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 8, 2025 | Sold | Held Oct 8, 2026 | Still held | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tyler Winklevoss Director | 150.25M | 0 | 157.40M | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Tyler Winklevoss0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($4.05 − strike price), using the most recent insider trade price on Form 4 (Aug 20, 2026), not a market close. | ||||||||||||||||||||||||||||||||
Marshall BeardiIncludes unvested RSUs, amount not disclosed. Chief Operating Officer, Director | 1.58M | 0 | 1.51M | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Marshall Beard0shares vested or exercised 0gifted (net of own trusts) −72Kwithheld by the company for taxes none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($4.05 − strike price), using the most recent insider trade price on Form 4 (Aug 20, 2026), not a market close. | ||||||||||||||||||||||||||||||||
Tyler MeadeiIncludes unvested RSUs, amount not disclosed. Chief Legal Officer | 1.12M | 0 | 1.07M | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Tyler Meade0shares vested or exercised 0gifted (net of own trusts) −51Kwithheld by the company for taxes none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($4.05 − strike price), using the most recent insider trade price on Form 4 (Aug 20, 2026), not a market close. | ||||||||||||||||||||||||||||||||
Daniel CheniIncludes unvested RSUs, amount not disclosed. Chief Financial Officer | 536K | 0 | 536K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Daniel Chen | ||||||||||||||||||||||||||||||||
Jonathan DurhamiIncludes unvested RSUs, amount not disclosed. Director | 79K | 0 | 122K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Jonathan Durham | ||||||||||||||||||||||||||||||||
Danijela StojanoviciIncludes unvested RSUs, amount not disclosed. Started reporting during the period; starting holdings are from the Form 3. Interim CFO | 36K | −28K | 188K | +426% | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Danijela Stojanovic0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end
| ||||||||||||||||||||||||||||||||
Maria FilipakisiIncludes unvested RSUs, amount not disclosed. Director | 16K | 0 | 77K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Maria Filipakis | ||||||||||||||||||||||||||||||||
Sachin JaitlyiIncludes unvested RSUs, amount not disclosed. Shares held through Tessera Venture Capital Fund II, LP belong to an outside shareholder this director represents; they are listed under "Board members representing outside shareholders", not here. Director | 7.1K | 0 | 50K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Sachin Jaitly0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end
| ||||||||||||||||||||||||||||||||
James EspositoiIncludes unvested RSUs, amount not disclosed. Director | 7.1K | 0 | 50K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for James Esposito | ||||||||||||||||||||||||||||||||
9 of 9 insiders fully reconciled: starting holdings plus reported transactions match ending holdings (9 exactly, 0 with a minor or footnoted difference). Percentages cover all 9 officers and directors. "Still held" compares ending with starting vested shares; a plus sign means the holding grew.
What explains the selling$129K of sales by plan status, purpose, seller and month
Officer and director open-market sales: $129K across 28,078 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 ($97K), including tax-related sales outside a plan.
Taxes
$129K of sales (100.0%) cite tax obligations in their footnotes, $32K of them also under a plan. Separately, 123,104 shares ($1.6M) were withheld by the company for taxes, which isn't a market sale. Example: Danijela Stojanovic, Aug 20, 2026
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Danijela Stojanovic Interim CFO | 28K | $129K | 25% | 100% | May 20, 2026 to Aug 20, 2026 |
Sales by month
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $0 | $0 | $0 | $0 |
| Dec 2025 | $0 | $0 | $0 | $0 |
| Jan 2026 | $0 | $0 | $0 | $0 |
| Feb 2026 | $0 | $0 | $0 | $0 |
| Mar 2026 | $0 | $0 | $0 | $0 |
| Apr 2026 | $0 | $0 | $0 | $0 |
| May 2026 | $59K | $0 | $59K | $0 |
| Jun 2026 | $0 | $0 | $0 | $0 |
| Jul 2026 | $37K | $0 | $37K | $0 |
| Aug 2026 | $32K | $32K | $0 | $0 |
| Sep 2026 | $0 | $0 | $0 | $0 |
| Oct 2026 | $0 | $0 | $0 | $0 |
Board members representing outside shareholders (1)Listed and sourced; not part of the management totals or the answer line
Directors whose reported holdings sit mostly in an investment fund or a corporate shareholder they represent, not in their own name, with beneficial ownership disclaimed except for their own financial interest. Listed and sourced here; not part of the management totals or the answer line. Shares a fund hands to its own investors are distributions, not sales.
| Board member | Held Oct 8, 2025 | Sold | Held Oct 8, 2026 | Still held |
|---|---|---|---|---|
Sachin Jaitly!Holdings couldn't be fully reconciled. Balance changed without a matching transaction, and the footnote does not state the amount: +3,995 shares on Mar 11, 2026 (Tessera Venture Capital Fund II, LP). See the filing Sales and other transactions for Sachin Jaitly are complete. Director | n/a | −40K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Sachin Jaitly0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Holdings couldn't be fully reconciled. Balance changed without a matching transaction, and the footnote does not state the amount: +3,995 shares on Mar 11, 2026 (Tessera Venture Capital Fund II, LP). The balances below are as reported, not verified totals. | ||||
Is this normal? Selling year by yearNot enough history to compare
Not enough history to compare: fewer than three earlier years of filings.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 8, 2026 Latest 12 months | 28K | 1 | $129K |
| Oct 8, 2025 1 year earlier · filings don't cover the whole year | 458K | 2 | $12.0M |
| Oct 8, 2024 2 years earlier · filings don't cover the whole year | n/a | n/a | n/a |
| Oct 9, 2023 3 years earlier · filings don't cover the whole year | n/a | n/a | n/a |
| Oct 9, 2022 4 years earlier · filings don't cover the whole year | n/a | n/a | n/a |
| Oct 9, 2021 5 years earlier · filings don't cover the whole year | n/a | n/a | n/a |
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.
Known gaps and uncertaintyEvery officer and director reconciles
Sources and methodology44 filings from SEC EDGAR, and how we read them
All 44 Forms 3, 4 and 5 filed for Gemini Space Station, Inc. (SEC CIK 2055592) from Sep 11, 2025 to Aug 24, 2026, retrieved from SEC EDGAR on Oct 8, 2026. Prices are the ones reported in each filing, often weighted averages.
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".