GENBGenerate Biomedicines, Inc.Healthcare · Biotechnologyas of 2026-09-16
Horizon

Issued 2026-09-16 at $15.68 · now $15.68 (2026-09-16, +0.0% since)

Based on its own history, a month from the 2026-09-16 close, GENB has typically landed between $12.60 and $22.05 — a range of −19.6% to +40.6% from the issuance price $15.68.

Range of outcomes in historically similar periods — not a price prediction. Ranges are scored publicly on /methodology.
  • Actual close
  • Typical path (median)
  • Middle 50% of outcomes
  • 90% range

118 overlapping 1 month windows · 2026-02-272026-08-17 · basis climatology · forecast (batch).

The cone is anchored at the 2026-09-16 issuance close ($15.68) — the price the forecast resolves against on 2026-10-15, not the latest close. The drawn path shape is illustrative (bands widen with √t); every labeled number is real — the anchor, the scored batch p90/IQR endpoints, and the typical move.

Where GENB has typically landed a month from the 2026-09-16 close of $15.68 — the range is history, not a prediction.

$12.6worst · -19.6%$22.05best · +40.6%
  • now $15.68 (+0.0%)
  • typicalThe typical outcome — half of similar past periods did better and half did worse (not an average, so a few wild periods don't skew it). $16.54 (+5.5%)
  • middle 50%The central range of outcomes — half of similar past periods landed inside it, a quarter finished above, a quarter below. $15.17$17.91
  • 90% rangeA nine-in-ten range — in about nine of every ten similar past periods the outcome stayed within these bounds. $12.6$22.05
Actual 1-month windows behind the coneiEvery overlapping 1-month window in this security's own price history was ranked by realized return; shown are the 3 worst and 3 best of 118 windows spanning 2026-02-27 to 2026-09-16. Not cherry-picked — these are the extremes of the full sample. Max drop / max rise are the deepest and highest points reached within each window. See /methodology.
StartReturnMax dropMax rise
3 worst
2026-05-13−23.7%−26.2%+0.0%
2026-06-29−22.6%−22.6%+3.0%
2026-06-26−20.2%−20.2%+5.7%
3 best
2026-07-27+49.0%−4.4%+49.0%
2026-06-02+45.4%+0.0%+45.4%
2026-07-24+32.2%−2.4%+32.2%

118 overlapping windows · 2026-02-272026-09-16 · not cherry-picked

Reported insider & political trades

Every Form 4 the people closest to this company have filed with the SEC — plotted against the share price, aggregated by month, and shown with the gap between when each trade happened and when it was disclosed. A public record, not advice.

Share price & reported tradesMonthly open-market valueReporting lag — trade date to filing date2026-092026-082026-072026-062026-052026-042026-032026-022026-012025-122025-112025-102025-092025-08$20$112026-09-01: 1 insider sale, $16K — ARNOLD FRANCES2026-03-04: 1 insider purchase, $240K — Nally Michael2026-03-02: 10 insider purchases, $150.1M — AFEYAN NOUBAR, Mendillo Jane L, Silvers Jason, Grous Beth …2026-03: 11 open-market purchases, $150.3M2026-09: 1 open-market sale, $16K↑ buys↓ salesdirector ARNOLD FRANCES — Sale on 2026-09-01, filed 2 days after the tradedirector Nally Michael — Purchase on 2026-03-04, filed 2 days after the tradedirector AFEYAN NOUBAR — Purchase on 2026-03-02, filed same daydirector AFEYAN NOUBAR — Purchase on 2026-03-02, filed same daydirector AFEYAN NOUBAR — Purchase on 2026-03-02, filed same daydirector AFEYAN NOUBAR — Purchase on 2026-03-02, filed same daydirector AFEYAN NOUBAR — Purchase on 2026-03-02, filed same daydirector AFEYAN NOUBAR — Purchase on 2026-03-02, filed same daydirector Mendillo Jane L — Purchase on 2026-03-02, filed same dayofficer Silvers Jason — Purchase on 2026-03-02, filed same dayofficer Silvers Jason — Purchase on 2026-03-02, filed same dayofficer Grous Beth — Purchase on 2026-03-02, filed same day
DatePersonRoleActionShares @ priceValueOwnership Δvs S&P 1mvs S&P 6mOwned afterFiling
2026-09-01ARNOLD FRANCESdirectorSale1,000 @ $16.00$16K−0.4% of holdingnot yet — horizon still opennot yet — horizon still open231,472Form 4 · filed 2 days after the trade
2026-03-04Nally MichaeldirectorPurchase20,000 @ $12.00$240K+3.6% of holding+22.8%+28.3%572,707Form 4 · filed 2 days after the trade
2026-03-02AFEYAN NOUBARdirectorPurchase1,562,500 @ $16.00$25.0M+11.4% of holding+7.7%+13.1%15,264,724Form 4 · filed same day
2026-03-02AFEYAN NOUBARdirectorPurchase1,562,500 @ $16.00$25.0M+56.3% of holding+7.7%+13.1%4,340,252Form 4 · filed same day
2026-03-02AFEYAN NOUBARdirectorPurchase1,562,500 @ $16.00$25.0Mownership Δ n/a+7.7%+13.1%1,562,500Form 4 · filed same day
2026-03-02AFEYAN NOUBARdirectorPurchase1,562,500 @ $16.00$25.0M+56.3% of holding+7.7%+13.1%4,340,252Form 4 · filed same day
2026-03-02AFEYAN NOUBARdirectorPurchase1,562,500 @ $16.00$25.0M+11.4% of holding+7.7%+13.1%15,264,724Form 4 · filed same day
2026-03-02AFEYAN NOUBARdirectorPurchase1,562,500 @ $16.00$25.0Mownership Δ n/a+7.7%+13.1%1,562,500Form 4 · filed same day
2026-03-02Mendillo Jane LdirectorPurchase1,500 @ $16.00$24Kownership Δ n/a+7.7%+13.1%1,500Form 4 · filed same day
2026-03-02Silvers JasonofficerPurchase1,000 @ $16.00$16Kownership Δ n/a+7.7%+13.1%1,000Form 4 · filed same day
2026-03-02Silvers JasonofficerPurchase500 @ $16.00$8Kownership Δ n/a+7.7%+13.1%500Form 4 · filed same day
2026-03-02Grous BethofficerPurchase300 @ $16.00$5Kownership Δ n/a+7.7%+13.1%300Form 4 · filed same day

The vs-S&P columns are a labeled look-back on what the stock did after each filing, measured against the index over the same window. Descriptive history, not a claim about the person or a reason to trade.

124 award / exercise / gift records — not counted as purchases

Awards, option exercises, gifts and tax-withholding disposals are shown separately and never counted as open-market purchases or sales — they carry no conviction information.

DatePersonRoleActionSharesOwned afterFiling
2026-03-02AFEYAN NOUBARdirectorConversion1,265,8220Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,953,5860Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,109,7040Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,531,6440Form 4
2026-03-02Nally MichaeldirectorConversion1,000,0000Form 4
2026-03-02AFEYAN NOUBARdirectorConversion17,016,2150Form 4
2026-03-02AFEYAN NOUBARdirectorConversion18,483,7850Form 4
2026-03-02AFEYAN NOUBARdirectorConversion1,500,0000Form 4
2026-03-02AFEYAN NOUBARdirectorConversion843,8810Form 4
2026-03-02AFEYAN NOUBARdirectorConversion1,265,8220Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,953,5860Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,109,7040Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,531,6440Form 4
2026-03-02Bancel StephanedirectorConversion1,100,0000Form 4
2026-03-02AFEYAN NOUBARdirectorConversion18,483,7850Form 4
2026-03-02AFEYAN NOUBARdirectorConversion17,016,2150Form 4
2026-03-02AFEYAN NOUBARdirectorConversion1,500,0000Form 4
2026-03-02AFEYAN NOUBARdirectorConversion843,8810Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion12,723,94012,723,940Form 4
2026-03-02AFEYAN NOUBARdirectorConversion13,702,22413,702,224Form 4
2026-03-02AFEYAN NOUBARdirectorConversion987,491987,491Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion12,723,94012,723,940Form 4
2026-03-02AFEYAN NOUBARdirectorConversion13,702,22413,702,224Form 4
2026-03-02AFEYAN NOUBARdirectorConversion987,491987,491Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02Nally MichaeldirectorConversion658,3271,316,654Form 4
2026-03-02AFEYAN NOUBARdirectorConversion12,723,94012,723,940Form 4
2026-03-02AFEYAN NOUBARdirectorConversion13,702,22413,702,224Form 4
2026-03-02AFEYAN NOUBARdirectorConversion987,491987,491Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion12,723,94012,723,940Form 4
2026-03-02AFEYAN NOUBARdirectorConversion987,491987,491Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion2,777,7522,777,752Form 4
2026-03-02AFEYAN NOUBARdirectorConversion13,702,22413,702,224Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Across 2012–2021, stocks where a CEO, C-suite officer, or director had recently made an open-market common-stock purchase ran about +28 bp per month above the universe average (n=34,268 stock-weeks). A historical tendency, not a prediction.

Congressional disclosures

No congressional trades disclosed for this company.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.