ALTAltimmune, Inc.Healthcare · Biotechnologyas of 2026-09-25
Horizon

Issued 2026-09-25 at $3.06 · now $3.06 (2026-09-25, +0.0% since)

Based on its own history, a month from the 2026-09-25 close, ALT has typically landed between $2.16 and $4.51 — a range of −29.5% to +47.3% from the issuance price $3.06.

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

2,323 overlapping 1 month windows · 2017-05-26 – 2026-08-26 · basis climatology · forecast (batch). Base rate up 53.7% (90% CI 51.5–55.9%, ≈1,391 obs). Not a call on this stock — we have no evidence its odds differ.

The cone is anchored at the 2026-09-25 issuance close ($3.06) — the price the forecast resolves against on 2026-10-26, 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 ALT has typically landed a month from the 2026-09-25 close of $3.06 — the range is history, not a prediction.

$2.16worst · -29.5%$4.51best · +47.3%
  • now $3.06 (+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). $2.9 (-5.2%)
  • middle 50%The central range of outcomes — half of similar past periods landed inside it, a quarter finished above, a quarter below. $2.5–$3.3
  • 90% rangeA nine-in-ten range — in about nine of every ten similar past periods the outcome stayed within these bounds. $2.16–$4.51
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 2,323 windows spanning 2017-05-26 to 2026-09-25. 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
2018-09-21−84.3%−85.3%+0.0%
2018-09-20−83.6%−85.3%+0.0%
2018-09-25−70.1%−70.6%+0.0%
3 best
2020-06-18+355.6%+0.0%+355.6%
2020-06-19+324.3%+0.0%+349.5%
2023-11-24+290.4%+0.0%+290.4%

2,323 overlapping windows · 2017-05-26 – 2026-09-25 · not cherry-picked

Pending catalysts

  • 2027-03-31 — Trial primary completion: Phase 2 primary completion: RESTORE TRIAL: A Phase 2 Study Evaluating the Efficacy and Safety of Pemvidutide in the Treatment of Alcohol-Associated Liver Disease (ALD) (source, as of 2026-08-14)

Public, scheduled events — dated attention, not a prediction of the outcome. See the FDA catalysts page for the historical base rate.

Seasonality · by month iHow this security has tended to do in each calendar month historically — a frequency, never a prediction.

iFor each calendar month, the share of years this security closed higher than the month before, and the average month-over-month return, over ~10 years of its own price history. Cells are shaded by average return. This is historical frequency, not a prediction — no month is a signal.
Jan
33%
+7.3%
n=9
Feb
44%
−2.8%
n=9
Mar
22%
−11.3%
n=9
Apr
33%
−10.4%
n=9
May
56%
+20.9%
n=9
Jun
20%
+1.8%
n=10
Jul
30%
+7.6%
n=10
Aug
50%
+9.2%
n=10
Sep
10%
−16.7%
n=10
Oct
33%
−2.4%
n=9
Nov
44%
+4.0%
n=9
Dec
44%
+25.0%
n=9

Up-frequency and average month-over-month return · historical frequency, not a prediction

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$6$32026-08-13: 1 insider purchase, $44K — Durso Jerome Benedict2026-04-06: 1 insider purchase, $31K — GILL JOHN2026-04-01: 2 insider purchases, $79K — Durso Jerome Benedict, WEAVER GREGORY L2026-03-06: 2 insider purchases, $88K — Durso Jerome Benedict, WEAVER GREGORY L2026-01-08: 1 insider purchase, $20K — Pisano Wayne2026-01-05: 1 insider purchase, $2K — Sohn Catherine A.2025-12-29: 1 insider purchase, $2K — Jorkasky Diane2025-12-23: 1 insider purchase, $51K — GILL JOHN2025-12-22: 1 insider purchase, $52K — Durso Jerome Benedict2025-12: 3 open-market purchases, $105K2026-01: 2 open-market purchases, $23K2026-03: 2 open-market purchases, $88K2026-04: 3 open-market purchases, $110K↑ buys↓ salesdirector Durso Jerome Benedict — Purchase on 2026-08-13, filed same daydirector GILL JOHN — Purchase on 2026-04-06, filed same daydirector Durso Jerome Benedict — Purchase on 2026-04-01, filed same dayofficer WEAVER GREGORY L — Purchase on 2026-04-01, filed same daydirector Durso Jerome Benedict — Purchase on 2026-03-06, filed 3 days after the tradeofficer WEAVER GREGORY L — Purchase on 2026-03-06, filed 3 days after the tradedirector Pisano Wayne — Purchase on 2026-01-08, filed 1 day after the tradedirector Sohn Catherine A. — Purchase on 2026-01-05, filed same daydirector Jorkasky Diane — Purchase on 2025-12-29, filed same daydirector GILL JOHN — Purchase on 2025-12-23, filed same daydirector Durso Jerome Benedict — Purchase on 2025-12-22, filed same day
DatePersonRoleActionShares @ priceValueOwnership Δvs S&P 1mvs S&P 6mOwned afterFiling
2026-08-13Durso Jerome BenedictdirectorPurchase15,000 @ $2.95$44K+31.6% of holding+17.0%not yet — horizon still open62,500Form 4 · filed same day
2026-04-06GILL JOHNdirectorPurchase9,200 @ $3.41$31K+73.6% of holding−17.9%not yet — horizon still open21,700Form 4 · filed same day
2026-04-01Durso Jerome BenedictdirectorPurchase15,000 @ $3.14$47K+46.2% of holding−19.6%not yet — horizon still open47,500Form 4 · filed same day
2026-04-01WEAVER GREGORY LofficerPurchase10,000 @ $3.15$31K+35.6% of holding−19.6%not yet — horizon still open38,078Form 4 · filed same day
2026-03-06Durso Jerome BenedictdirectorPurchase20,000 @ $3.54$71K+160.0% of holding−2.8%−18.5%32,500Form 4 · filed 3 days after the trade
2026-03-06WEAVER GREGORY LofficerPurchase5,000 @ $3.54$18K+21.7% of holding−2.8%−18.5%28,078Form 4 · filed 3 days after the trade
2026-01-08Pisano WaynedirectorPurchase5,000 @ $4.08$20K+58.8% of holding+14.3%−35.9%13,498Form 4 · filed 1 day after the trade
2026-01-05Sohn Catherine A.directorPurchase500 @ $4.24$2K+50.0% of holding+25.7%−32.9%1,500Form 4 · filed same day
2025-12-29Jorkasky DianedirectorPurchase527 @ $3.80$2Kownership Δ n/a+37.7%−23.4%527Form 4 · filed same day
2025-12-23GILL JOHNdirectorPurchase12,500 @ $4.10$51Kownership Δ n/a+40.8%−36.0%12,500Form 4 · filed same day
2025-12-22Durso Jerome BenedictdirectorPurchase12,500 @ $4.13$52Kownership Δ n/a+32.2%−38.5%12,500Form 4 · filed same day
2025-03-17Sohn Catherine A.directorPurchase1,000 @ $5.78$6Kownership Δ n/a−19.2%−56.3%1,000Form 4 · filed 1 day after the trade
2025-03-13WEAVER GREGORY LofficerPurchase10,000 @ $5.20$52Kownership Δ n/a−12.3%−49.9%10,000Form 4 · filed 1 day after the trade
2024-08-19Drutz DaviddirectorSale8,184 @ $6.88$56K−12.8% of holding−1.8%−21.8%55,524Form 4 · filed 1 day after the trade
2024-08-19Drutz DaviddirectorSale7,827 @ $6.93$54K−15.7% of holding−1.8%−21.8%41,958Form 4 · filed 1 day after the trade

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.

149 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
2026-09-16Richardson Linda MofficerWithheld for tax6,82617,174Form 4
2026-09-16Richardson Linda MofficerOption exercise24,00024,000Form 4
2026-09-16Richardson Linda MofficerOption exercise24,00072,000Form 4
2026-07-31WEAVER GREGORY LofficerAward / grant1,75339,831Form 4
2026-07-31Roberts M ScotofficerAward / grant875113,699Form 4
2026-05-01GILL JOHNdirectorAward / grant48,80048,800Form 4
2026-05-01Jorkasky DianedirectorAward / grant48,80048,800Form 4
2026-05-01Sohn Catherine A.directorAward / grant48,80048,800Form 4
2026-05-01Hodges PhilipdirectorAward / grant48,80048,800Form 4
2026-05-01SAYARE MITCHELdirectorAward / grant48,80048,800Form 4
2026-05-01Lawver Teri LdirectorAward / grant48,80048,800Form 4
2026-05-01Schafer KlausdirectorAward / grant48,80048,800Form 4
2026-05-01Pisano WaynedirectorAward / grant48,80048,800Form 4
2026-02-26WEAVER GREGORY LofficerAward / grant259,000259,000Form 4
2026-02-26Roberts M ScotofficerAward / grant95,43095,430Form 4
2026-02-26Roberts M ScotofficerAward / grant222,670222,670Form 4
2026-02-26WEAVER GREGORY LofficerAward / grant111,000111,000Form 4
2026-02-02Roberts M ScotofficerWithheld for tax2,329112,824Form 4
2026-02-02Roberts M ScotofficerOption exercise7,7750Form 4
2026-02-02Roberts M ScotofficerOption exercise7,775115,153Form 4
2026-01-31Garg Vipin KdirectorAward / grant6,926424,519Form 4
2026-01-31Roberts M ScotofficerAward / grant5,567107,378Form 4
2026-01-31Jordt Raymond MofficerAward / grant4,57170,107Form 4
2026-01-30Garg Vipin KdirectorWithheld for tax11,632417,593Form 4
2026-01-30Roberts M ScotofficerWithheld for tax2,859101,811Form 4
2026-01-30Garg Vipin KdirectorOption exercise26,775429,225Form 4
2026-01-30Roberts M ScotofficerOption exercise9,2759,275Form 4
2026-01-30Roberts M ScotofficerOption exercise9,275104,670Form 4
2026-01-30Garg Vipin KdirectorOption exercise26,77526,775Form 4
2026-01-27Garg Vipin KdirectorWithheld for tax17,898402,450Form 4
2026-01-27Roberts M ScotofficerWithheld for tax4,74895,395Form 4
2026-01-27Jordt Raymond MofficerWithheld for tax4,22965,536Form 4
2026-01-27Garg Vipin KdirectorOption exercise41,200123,600Form 4
2026-01-27Roberts M ScotofficerOption exercise15,85047,550Form 4
2026-01-27Garg Vipin KdirectorOption exercise41,200420,348Form 4
2026-01-27Jordt Raymond MofficerOption exercise15,85069,765Form 4
2026-01-27Roberts M ScotofficerOption exercise15,850100,143Form 4
2026-01-27Jordt Raymond MofficerOption exercise15,85047,550Form 4
2026-01-25Garg Vipin KdirectorWithheld for tax17,984379,148Form 4
2026-01-25Roberts M ScotofficerWithheld for tax4,37384,293Form 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.