FIBKFirst Interstate BancSystem, Inc.Financial Services · Banks - Regionalas of 2026-09-16
Horizon

Issued 2026-09-16 at $36.92 · now $36.92 (2026-09-16, +0.0% since)

Based on its own history, a month from the 2026-09-16 close, FIBK has typically landed between $32.03 and $42.17 — a range of −13.3% to +14.2% from the issuance price $36.92.

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

4,125 overlapping 1 month windows · 2010-03-24 – 2026-08-17 · basis climatology · forecast (batch). Probability up 53.9% (90% CI 51.7–56.1%, ≈1,408 obs).

The cone is anchored at the 2026-09-16 issuance close ($36.92) — 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 FIBK has typically landed a month from the 2026-09-16 close of $36.92 — the range is history, not a prediction.

$32.03worst · -13.3%$42.17best · +14.2%
  • now $36.92 (+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). $37.19 (+0.7%)
  • middle 50%The central range of outcomes — half of similar past periods landed inside it, a quarter finished above, a quarter below. $35.05–$39.32
  • 90% rangeA nine-in-ten range — in about nine of every ten similar past periods the outcome stayed within these bounds. $32.03–$42.17
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 4,125 windows spanning 2010-03-24 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
2020-02-20−33.6%−34.2%+0.0%
2020-02-21−32.9%−34.1%+0.0%
2020-02-13−32.8%−33.7%+0.8%
3 best
2023-11-13+29.0%+0.0%+29.0%
2023-07-06+28.4%+0.0%+28.4%
2016-11-04+27.8%+0.0%+27.8%

4,125 overlapping windows · 2010-03-24 – 2026-09-16 · not cherry-picked

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 ~17 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
38%
−3.4%
n=16
Feb
56%
+2.9%
n=16
Mar
50%
−2.1%
n=16
Apr
41%
−1.0%
n=17
May
59%
+0.4%
n=17
Jun
76%
+2.6%
n=17
Jul
59%
+1.6%
n=17
Aug
35%
+0.3%
n=17
Sep
59%
+0.9%
n=17
Oct
75%
+3.3%
n=16
Nov
75%
+5.2%
n=16
Dec
56%
+1.9%
n=16

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$40$282026-09-16: 1 insider sale, $102K — SCOTT JULIE A2026-09-14: 1 insider sale, $301K — Scott Jonathan R2026-09-11: 1 insider sale, $627K — Scott Jonathan R2026-07-16: 1 insider sale, $403K — Scott Jonathan R2026-06-18: 4 insider sales, $879K — Scott Jonathan R, SCOTT JULIE A …2026-06-17: 1 insider sale, $163K — Scott Jonathan R2026-06-04: 1 insider sale, $459K — Scott Jonathan R2026-04-30: 1 insider sale, $1.9M — Scott Jonathan R2026-03-26: 1 insider sale, $100K — Scott Jonathan R2026-01-06: 1 insider sale, $67K — Scott Jonathan R2026-01-05: 1 insider sale, $115K — Scott Jonathan R2025-12-01: 1 insider sale, $328K — Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees2025-11-21: 1 insider sale, $944K — HEYNEMAN JOHN M JR2025-11-11: 1 insider sale, $482K — HEYNEMAN JOHN M JR2025-11-10: 1 insider sale, $641K — HEYNEMAN JOHN M JR2025-11-03: 2 insider sales, $460K — Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees, Scott Jonathan R2025-10-29: 1 insider sale, $225K — Scott Jonathan R2025-10-09: 1 insider sale, $22K — Scott Jonathan R2025-10-08: 1 insider sale, $179K — Scott Jonathan R2025-10-07: 1 insider sale, $440K — Scott Jonathan R2025-10-01: 1 insider sale, $316K — Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees2025-09-02: 1 insider sale, $323K — Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees2025-08-14: 1 insider sale, $357K — HEYNEMAN JOHN M JR2025-08: 2 open-market sales, $1.9M2025-09: 1 open-market sale, $323K2025-10: 5 open-market sales, $1.2M2025-11: 5 open-market sales, $2.5M2025-12: 1 open-market sale, $328K2026-01: 2 open-market sales, $182K2026-03: 1 open-market sale, $100K2026-04: 1 open-market sale, $1.9M2026-06: 6 open-market sales, $1.5M2026-07: 1 open-market sale, $403K2026-09: 3 open-market sales, $1.0M↑ buys↓ salestenPercentOwner SCOTT JULIE A — Sale on 2026-09-16, filed same daytenPercentOwner Scott Jonathan R — Sale on 2026-09-14, filed same daytenPercentOwner Scott Jonathan R — Sale on 2026-09-11, filed 3 days after the tradetenPercentOwner Scott Jonathan R — Sale on 2026-07-16, filed same daytenPercentOwner Scott Jonathan R — Sale on 2026-06-18, filed same daytenPercentOwner SCOTT JULIE A — Sale on 2026-06-18, filed same daytenPercentOwner SCOTT JULIE A — Sale on 2026-06-18, filed same daytenPercentOwner SCOTT JULIE A — Sale on 2026-06-18, filed same daytenPercentOwner Scott Jonathan R — Sale on 2026-06-17, filed 1 day after the tradetenPercentOwner Scott Jonathan R — Sale on 2026-06-04, filed same daytenPercentOwner Scott Jonathan R — Sale on 2026-04-30, filed 1 day after the tradetenPercentOwner Scott Jonathan R — Sale on 2026-03-26, filed 1 day after the tradetenPercentOwner Scott Jonathan R — Sale on 2026-01-06, filed same daytenPercentOwner Scott Jonathan R — Sale on 2026-01-05, filed 1 day after the tradetenPercentOwner Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees — Sale on 2025-12-01, filed same daydirector HEYNEMAN JOHN M JR — Sale on 2025-11-21, filed 4 days after the tradedirector HEYNEMAN JOHN M JR — Sale on 2025-11-11, filed 1 day after the tradedirector HEYNEMAN JOHN M JR — Sale on 2025-11-10, filed 2 days after the tradetenPercentOwner Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees — Sale on 2025-11-03, filed same daytenPercentOwner Scott Jonathan R — Sale on 2025-11-03, filed same daytenPercentOwner Scott Jonathan R — Sale on 2025-10-29, filed same daytenPercentOwner Scott Jonathan R — Sale on 2025-10-09, filed same daytenPercentOwner Scott Jonathan R — Sale on 2025-10-08, filed same daytenPercentOwner Scott Jonathan R — Sale on 2025-10-07, filed 1 day after the tradetenPercentOwner Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees — Sale on 2025-10-01, filed 2 days after the tradetenPercentOwner Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees — Sale on 2025-09-02, filed same daydirector HEYNEMAN JOHN M JR — Sale on 2025-08-14, filed 4 days after the trade
DatePersonRoleActionShares @ priceValueOwnership Δvs S&P 1mvs S&P 6mOwned afterFiling
2026-09-16SCOTT JULIE AtenPercentOwnerSale2,700 @ $37.64$102K−0.6% of holdingnot yet — horizon still opennot yet — horizon still open484,309Form 4 · filed same day
2026-09-14Scott Jonathan RtenPercentOwnerSale8,071 @ $37.29$301K−1.0% of holdingnot yet — horizon still opennot yet — horizon still open817,738Form 4 · filed same day
2026-09-11Scott Jonathan RtenPercentOwnerSale16,929 @ $37.03$627K−2.0% of holdingnot yet — horizon still opennot yet — horizon still open825,809Form 4 · filed 3 days after the trade
2026-07-16Scott Jonathan RtenPercentOwnerSale10,000 @ $40.30$403K−1.2% of holding−4.8%not yet — horizon still open842,738Form 4 · filed same day
2026-06-18Scott Jonathan RtenPercentOwnerSale9,390 @ $36.11$339K−1.1% of holding+6.8%not yet — horizon still open852,738Form 4 · filed same day
2026-06-18SCOTT JULIE AtenPercentOwnerSale5,000 @ $35.98$180K−1.0% of holding+6.8%not yet — horizon still open493,359Form 4 · filed same day
2026-06-18SCOTT JULIE AtenPercentOwnerSale5,000 @ $35.97$180K−1.0% of holding+6.8%not yet — horizon still open488,359Form 4 · filed same day
2026-06-18SCOTT JULIE AtenPercentOwnerSale5,000 @ $35.95$180K−1.0% of holding+6.8%not yet — horizon still open498,359Form 4 · filed same day
2026-06-17Scott Jonathan RtenPercentOwnerSale4,500 @ $36.29$163K−0.5% of holding+7.7%not yet — horizon still open862,128Form 4 · filed 1 day after the trade
2026-06-04Scott Jonathan RtenPercentOwnerSale12,892 @ $35.58$459K−1.5% of holding+10.6%not yet — horizon still open866,628Form 4 · filed same day
2026-04-30Scott Jonathan RtenPercentOwnerSale53,504 @ $35.42$1.9M−5.7% of holding−6.4%not yet — horizon still open879,520Form 4 · filed 1 day after the trade
2026-03-26Scott Jonathan RtenPercentOwnerSale3,000 @ $33.45$100K−0.3% of holding−5.4%not yet — horizon still open933,024Form 4 · filed 1 day after the trade
2026-01-06Scott Jonathan RtenPercentOwnerSale1,827 @ $36.92$67K−0.2% of holding+4.5%−1.7%936,024Form 4 · filed same day
2026-01-05Scott Jonathan RtenPercentOwnerSale3,173 @ $36.20$115K−0.3% of holding+6.0%−0.2%937,851Form 4 · filed 1 day after the trade
2025-12-01Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-TrusteestenPercentOwnerSale10,000 @ $32.75$328K−4.3% of holding+4.2%−5.0%224,460Form 4 · filed same day
2025-11-21HEYNEMAN JOHN M JRdirectorSale30,432 @ $31.03$944K−2.1% of holding+9.5%+1.9%1,414,636Form 4 · filed 4 days after the trade
2025-11-11HEYNEMAN JOHN M JRdirectorSale15,000 @ $32.14$482K−33.2% of holding+8.5%−1.6%30,154Form 4 · filed 1 day after the trade
2025-11-10HEYNEMAN JOHN M JRdirectorSale20,000 @ $32.06$641K−29.6% of holding+10.5%−0.2%47,482Form 4 · filed 2 days after the trade
2025-11-03Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-TrusteestenPercentOwnerSale10,000 @ $30.99$310K−4.1% of holding+6.4%+9.6%234,460Form 4 · filed same day
2025-11-03Scott Jonathan RtenPercentOwnerSale4,800 @ $31.27$150K−0.5% of holding+6.4%+9.6%941,024Form 4 · filed same day
2025-10-29Scott Jonathan RtenPercentOwnerSale7,000 @ $32.09$225K−0.7% of holding+4.4%+7.9%945,824Form 4 · filed same day
2025-10-09Scott Jonathan RtenPercentOwnerSale685 @ $31.66$22K−0.1% of holding+3.7%+10.0%952,824Form 4 · filed same day
2025-10-08Scott Jonathan RtenPercentOwnerSale5,600 @ $32.01$179K−0.6% of holding+0.6%+8.6%953,509Form 4 · filed same day
2025-10-07Scott Jonathan RtenPercentOwnerSale13,715 @ $32.09$440K−1.4% of holding−0.1%+8.3%959,109Form 4 · filed 1 day after the trade
2025-10-01Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-TrusteestenPercentOwnerSale10,000 @ $31.59$316K−3.9% of holding−2.6%+9.6%244,460Form 4 · filed 2 days after the trade
2025-09-02Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-TrusteestenPercentOwnerSale10,000 @ $32.28$323K−1.9% of holding−7.2%+3.2%519,256Form 4 · filed same day
2025-08-14HEYNEMAN JOHN M JRdirectorSale11,818 @ $30.18$357K−69.3% of holding+3.4%+20.0%5,224Form 4 · filed 4 days after the trade
2025-08-01Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-TrusteestenPercentOwnerSale55,000 @ $27.86$1.5M−9.4% of holding+13.5%+21.1%529,256Form 4 · filed same day
2025-07-14Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-TrusteestenPercentOwnerSale55,000 @ $31.11$1.7M−8.6% of holding−5.3%+9.2%584,256Form 4 · filed 1 day after the trade
2025-02-26HEYNEMAN JOHN M JRdirectorSale250 @ $30.52$8K−0.0% of holding+0.3%+0.4%1,414,636Form 4 · filed same day
2025-02-14HEYNEMAN JOHN M JRdirectorSale1,335 @ $32.56$43K−0.1% of holding−3.8%−10.2%1,414,886Form 4 · filed 4 days 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.

98 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
2026-09-14Lee Jeffery D.officerAward / grant5,4175,417Form 4
2026-07-27SCOTT JULIE AtenPercentOwnerGift1,350487,009Form 4
2026-07-22Ritter Matthew JohndirectorAward / grant1,8061,806Form 4
2026-07-22TURNER BRIAN KEVINdirectorAward / grant1,8061,806Form 4
2026-06-01Cho Alice SdirectorAward / grant2,24715,792Form 4
2026-06-01Della Camera DavidofficerAward / grant3,37030,048Form 4
2026-06-01Scott James R. JrdirectorAward / grant2,24780,792Form 4
2026-06-01HEYNEMAN JOHN M JRdirectorAward / grant2,2477,471Form 4
2026-06-01Scott JeremydirectorAward / grant2,2475,743Form 4
2026-06-01SCUDDER MICHAEL LdirectorAward / grant2,2474,126Form 4
2026-06-01RYKHUS DANIEL AdirectorAward / grant2,24731,357Form 4
2026-06-01Agrawal RenudirectorAward / grant2,2474,074Form 4
2026-06-01Phillips Joyce AnndirectorAward / grant2,24714,599Form 4
2026-06-01Jensen Kirk DofficerAward / grant2,24734,978Form 4
2026-06-01Meyer LoriofficerAward / grant2,24716,517Form 4
2026-06-01Shepler Christopher L.officerAward / grant3,37013,240Form 4
2026-06-01Kanning Jolyn M.officerAward / grant2,24713,885Form 4
2026-06-01Johnson Dennis LdirectorAward / grant2,24719,455Form 4
2026-06-01Boschee Ryan J.officerAward / grant2,24716,777Form 4
2026-06-01Bowman BiffdirectorAward / grant4,35324,035Form 4
2026-03-16Reuter James AdirectorWithheld for tax5,12586,904Form 4
2026-03-16Meyer LoriofficerWithheld for tax1,55014,270Form 4
2026-03-16Jensen Kirk DofficerWithheld for tax1,37532,731Form 4
2026-03-16Della Camera DavidofficerWithheld for tax1,30726,678Form 4
2026-03-16Robbins KristinaofficerWithheld for tax1,24118,887Form 4
2026-03-15Reuter James AdirectorAward / grant31,39292,029Form 4
2026-03-15Della Camera DavidofficerAward / grant6,27927,985Form 4
2026-03-15Shepler Christopher L.officerAward / grant5,9719,870Form 4
2026-03-15Robbins KristinaofficerAward / grant4,04420,128Form 4
2026-03-15Jensen Kirk DofficerAward / grant3,95134,106Form 4
2026-03-15Jones Nathan RofficerAward / grant3,8433,843Form 4
2026-03-15Meyer LoriofficerAward / grant3,01215,820Form 4
2025-12-12SCOTT JAMES RdirectorGift7554,433,211Form 4
2025-12-12SCOTT JAMES RdirectorGift7554,433,966Form 4
2025-12-08Scott JeremydirectorGift5503,496Form 4
2025-12-08SCOTT JAMES RdirectorGift7554,433,966Form 4
2025-12-08SCOTT JAMES RdirectorGift7554,433,211Form 4
2025-12-08Scott Geoffrey DtenPercentOwnerGift5502,615Form 4
2025-12-08Scott Geoffrey DtenPercentOwnerGift550113,926Form 4
2025-12-03Scott Risa KaetenPercentOwnerGift3,000322,546Form 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.