Issued 2026-09-16 at $48.77 · now $48.77 (2026-09-16, +0.0% since)
Based on its own history, a month from the 2026-09-16 close, GTLB has typically landed between $35.50 and $63.90 — a range of −27.2% to +31.0% from the issuance price $48.77.
- Actual close
- Typical path (median)
- Middle 50% of outcomes
- 90% range
1,214 overlapping 1 month windows · 2021-10-14 – 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 ($48.77) — 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 GTLB has typically landed a month from the 2026-09-16 close of $48.77 — the range is history, not a prediction.
- now $48.77 (+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). $47.95 (-1.7%)
- middle 50%The central range of outcomes — half of similar past periods landed inside it, a quarter finished above, a quarter below. $42.05–$53.85
- 90% rangeA nine-in-ten range — in about nine of every ten similar past periods the outcome stayed within these bounds. $35.5–$63.9
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 1,214 windows spanning 2021-10-14 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.
| Start | Return | Max drop | Max rise |
|---|---|---|---|
| 3 worst | |||
| 2022-02-10 | −56.4% | −56.4% | +0.0% |
| 2022-02-09 | −54.9% | −54.9% | +0.0% |
| 2022-02-11 | −50.4% | −54.0% | +5.0% |
| 3 best | |||
| 2023-05-12 | +76.3% | +0.0% | +76.3% |
| 2023-05-16 | +76.2% | +0.0% | +76.2% |
| 2023-05-11 | +69.2% | −1.0% | +69.2% |
1,214 overlapping windows · 2021-10-14 – 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 ~5 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
60%
+3.5%
n=5
Feb
20%
−12.1%
n=5
Mar
0%
−17.5%
n=5
Apr
20%
−6.4%
n=5
May
40%
+6.1%
n=5
Jun
60%
+15.5%
n=5
Jul
60%
+3.7%
n=5
Aug
60%
+7.3%
n=5
Sep
40%
−2.3%
n=5
Oct
50%
+0.7%
n=4
Nov
40%
−3.6%
n=5
Dec
40%
+3.0%
n=5
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.
| Date | Person | Role | Action | Shares @ price | Value | Ownership Δ | vs S&P 1m | vs S&P 6m | Owned after | Filing |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-07 | Mundy Simon | officer | Sale | 8,725 @ $38.00 | $332K | −7.6% of holding | +21.9% | not yet — horizon still open | 105,332 | Form 4 · filed 4 days after the trade |
| 2026-06-30 | Staples William | director | Purchase | 4,188 @ $29.36 | $123K | +0.6% of holding | +11.1% | not yet — horizon still open | 758,828 | Form 4 · filed 1 day after the trade |
| 2026-06-15 | Sijbrandij Sytse | director | Sale | 102,635 @ $28.39 | $2.9M | −0.7% of holding | +12.5% | not yet — horizon still open | 14,915,616 | Form 4 · filed 2 days after the trade |
| 2026-06-15 | Sijbrandij Sytse | director | Sale | 13,565 @ $28.83 | $391K | −0.1% of holding | +12.5% | not yet — horizon still open | 14,902,051 | Form 4 · filed 2 days after the trade |
| 2026-05-18 | Sijbrandij Sytse | director | Sale | 105,408 @ $24.93 | $2.6M | −0.7% of holding | +5.2% | not yet — horizon still open | 15,018,251 | Form 4 · filed same day |
| 2026-05-18 | Sijbrandij Sytse | director | Sale | 10,792 @ $24.09 | $260K | −0.1% of holding | +5.2% | not yet — horizon still open | 15,123,659 | Form 4 · filed same day |
| 2026-04-15 | Sijbrandij Sytse | director | Sale | 116,200 @ $20.77 | $2.4M | −100.0% of holding | −3.0% | not yet — horizon still open | 0 | Form 4 · filed 1 day after the trade |
| 2026-03-31 | Staples William | director | Purchase | 5,069 @ $21.30 | $108K | +1.5% of holding | −8.2% | not yet — horizon still open | 343,710 | Form 4 · filed 1 day after the trade |
| 2026-03-31 | Staples William | director | Purchase | 941 @ $21.65 | $20K | +0.3% of holding | −8.2% | not yet — horizon still open | 344,651 | Form 4 · filed 1 day after the trade |
| 2026-03-27 | BOSTROM SUSAN L | director | Sale | 22,500 @ $20.32 | $457K | −56.5% of holding | −2.0% | not yet — horizon still open | 17,319 | Form 4 · filed 3 days after the trade |
| 2026-03-27 | BOSTROM SUSAN L | director | Sale | 10,000 @ $20.45 | $205K | −20.1% of holding | −2.0% | not yet — horizon still open | 39,819 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 193,722 @ $22.37 | $4.3M | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 188,658 @ $22.37 | $4.2M | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 66,797 @ $22.37 | $1.5M | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 9,079 @ $22.37 | $203K | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 543 @ $22.37 | $12K | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 347 @ $22.37 | $8K | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 328 @ $22.37 | $7K | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-20 | Jacobson Matthew | director | Sale | 325 @ $22.37 | $7K | −100.0% of holding | −9.0% | not yet — horizon still open | 0 | Form 4 · filed 3 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 346,845 @ $22.95 | $8.0M | −64.8% of holding | −13.1% | not yet — horizon still open | 188,658 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 235,382 @ $22.95 | $5.4M | −54.9% of holding | −13.1% | not yet — horizon still open | 193,722 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 66,183 @ $22.95 | $1.5M | −49.8% of holding | −13.1% | not yet — horizon still open | 66,797 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 49,349 @ $22.95 | $1.1M | −84.5% of holding | −13.1% | not yet — horizon still open | 9,079 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 827 @ $22.95 | $19K | −60.4% of holding | −13.1% | not yet — horizon still open | 543 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 529 @ $22.95 | $12K | −60.4% of holding | −13.1% | not yet — horizon still open | 347 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 499 @ $22.95 | $11K | −60.3% of holding | −13.1% | not yet — horizon still open | 328 | Form 4 · filed 4 days after the trade |
| 2026-03-19 | Jacobson Matthew | director | Sale | 495 @ $22.95 | $11K | −60.4% of holding | −13.1% | not yet — horizon still open | 325 | Form 4 · filed 4 days after the trade |
| 2026-02-17 | Sijbrandij Sytse | director | Sale | 51,300 @ $28.36 | $1.5M | −94.5% of holding | −17.2% | +33.0% | 3,000 | Form 4 · filed 1 day after the trade |
| 2026-02-17 | Sijbrandij Sytse | director | Sale | 3,000 @ $29.18 | $88K | −100.0% of holding | −17.2% | +33.0% | 0 | Form 4 · filed 1 day after the trade |
| 2026-01-14 | Sijbrandij Sytse | director | Sale | 44,249 @ $35.85 | $1.6M | −81.5% of holding | −17.0% | −17.8% | 10,051 | Form 4 · filed 1 day after the trade |
| 2026-01-14 | Sijbrandij Sytse | director | Sale | 10,051 @ $36.43 | $366K | −100.0% of holding | −17.0% | −17.8% | 0 | Form 4 · filed 1 day after the trade |
| 2025-12-31 | Staples William | director | Purchase | 3,276 @ $38.08 | $125K | +1.0% of holding | −7.8% | −23.2% | 345,671 | Form 4 · filed 5 days after the trade |
| 2025-12-31 | Shen James | officer | Sale | 2,538 @ $38.08 | $97K | −4.6% of holding | −7.8% | −23.2% | 52,284 | Form 4 · filed 5 days after the trade |
| 2025-12-19 | Jacobson Matthew | director | Sale | 334,827 @ $38.08 | $12.7M | −100.0% of holding | −2.8% | −33.9% | 0 | Form 4 · filed 4 days after the trade |
| 2025-12-18 | Mundy Simon | officer | Sale | 2,756 @ $38.42 | $106K | −5.5% of holding | −14.5% | −38.4% | 47,184 | Form 4 · filed same day |
| 2025-12-16 | Mundy Simon | officer | Sale | 723 @ $38.00 | $27K | −1.4% of holding | −12.6% | −41.2% | 52,784 | Form 4 · filed 2 days after the trade |
| 2025-12-15 | Sijbrandij Sytse | director | Sale | 53,600 @ $38.94 | $2.1M | −98.7% of holding | −11.9% | −40.9% | 700 | Form 4 · filed 2 days after the trade |
| 2025-12-15 | Sijbrandij Sytse | director | Sale | 700 @ $39.60 | $28K | −100.0% of holding | −11.9% | −40.9% | 0 | Form 4 · filed 2 days after the trade |
| 2025-12-09 | BOSTROM SUSAN L | director | Sale | 30,000 @ $39.25 | $1.2M | −37.6% of holding | −11.2% | −35.8% | 49,819 | Form 4 · filed 1 day after the trade |
| 2025-12-08 | BOSTROM SUSAN L | director | Sale | 15,000 @ $39.75 | $596K | −12.0% of holding | −10.2% | −33.7% | 109,819 | Form 4 · filed 2 days after the trade |
| 2025-12-08 | BOSTROM SUSAN L | director | Sale | 15,000 @ $39.55 | $593K | −10.7% of holding | −10.2% | −33.7% | 124,819 | Form 4 · filed 2 days after the trade |
| 2025-12-08 | BOSTROM SUSAN L | director | Sale | 15,000 @ $39.50 | $593K | −15.8% of holding | −10.2% | −33.7% | 79,819 | Form 4 · filed 2 days after the trade |
| 2025-12-08 | BOSTROM SUSAN L | director | Sale | 15,000 @ $39.42 | $591K | −13.7% of holding | −10.2% | −33.7% | 94,819 | Form 4 · filed 2 days after the trade |
| 2025-12-08 | BOSTROM SUSAN L | director | Sale | 10,000 @ $39.50 | $395K | −6.7% of holding | −10.2% | −33.7% | 139,819 | Form 4 · filed 2 days after the trade |
| 2025-11-17 | Sijbrandij Sytse | director | Sale | 73,941 @ $42.98 | $3.2M | −68.1% of holding | −12.0% | −49.4% | 34,659 | Form 4 · filed 2 days after the trade |
| 2025-11-17 | Sijbrandij Sytse | director | Sale | 34,659 @ $43.59 | $1.5M | −100.0% of holding | −12.0% | −49.4% | 0 | Form 4 · filed 2 days after the trade |
| 2025-10-15 | Sijbrandij Sytse | director | Sale | 76,892 @ $44.10 | $3.4M | −70.8% of holding | −0.3% | −58.3% | 31,708 | Form 4 · filed 1 day after the trade |
| 2025-10-15 | Sijbrandij Sytse | director | Sale | 31,708 @ $44.75 | $1.4M | −100.0% of holding | −0.3% | −58.3% | 0 | Form 4 · filed 1 day after the trade |
| 2025-10-15 | BLASING KAREN | director | Sale | 3,250 @ $45.26 | $147K | −3.2% of holding | −0.3% | −58.3% | 97,389 | Form 4 · filed 1 day after the trade |
| 2025-10-01 | Mundy Simon | officer | Sale | 5,191 @ $43.99 | $228K | −8.8% of holding | +5.9% | −47.5% | 53,507 | Form 4 · filed 1 day after the trade |
| 2025-09-23 | Jacobson Matthew | director | Sale | 22,386 @ $50.16 | $1.1M | −94.2% of holding | −2.2% | −57.3% | 1,370 | Form 4 · filed 2 days after the trade |
| 2025-09-23 | Jacobson Matthew | director | Sale | 14,304 @ $50.16 | $718K | −94.2% of holding | −2.2% | −57.3% | 876 | Form 4 · filed 2 days after the trade |
| 2025-09-23 | Jacobson Matthew | director | Sale | 13,510 @ $50.16 | $678K | −94.2% of holding | −2.2% | −57.3% | 827 | Form 4 · filed 2 days after the trade |
| 2025-09-23 | Jacobson Matthew | director | Sale | 13,387 @ $50.16 | $672K | −94.2% of holding | −2.2% | −57.3% | 820 | Form 4 · filed 2 days after the trade |
| 2025-09-19 | Jacobson Matthew | director | Sale | 82,160 @ $50.17 | $4.1M | −77.6% of holding | −7.3% | −54.9% | 23,756 | Form 4 · filed 4 days after the trade |
| 2025-09-19 | Jacobson Matthew | director | Sale | 52,501 @ $50.17 | $2.6M | −77.6% of holding | −7.3% | −54.9% | 15,180 | Form 4 · filed 4 days after the trade |
| 2025-09-19 | Jacobson Matthew | director | Sale | 49,587 @ $50.17 | $2.5M | −77.6% of holding | −7.3% | −54.9% | 14,337 | Form 4 · filed 4 days after the trade |
| 2025-09-19 | Jacobson Matthew | director | Sale | 49,134 @ $50.17 | $2.5M | −77.6% of holding | −7.3% | −54.9% | 14,207 | Form 4 · filed 4 days after the trade |
| 2025-09-18 | Jacobson Matthew | director | Sale | 16,652 @ $50.05 | $833K | −13.6% of holding | −10.1% | −54.3% | 105,916 | Form 4 · filed 1 day after the trade |
| 2025-09-18 | Jacobson Matthew | director | Sale | 10,640 @ $50.05 | $532K | −13.6% of holding | −10.1% | −54.3% | 67,681 | Form 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.
165 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.
| Date | Person | Role | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-08-21 | SULLIVAN GODFREY | director | Conversion | 12,500 | 154,874 | Form 4 |
| 2026-08-21 | SULLIVAN GODFREY | director | Conversion | 12,500 | 0 | Form 4 |
| 2026-08-21 | SULLIVAN GODFREY | director | Conversion | 12,500 | 0 | Form 4 |
| 2026-08-21 | SULLIVAN GODFREY | director | Conversion | 12,500 | 0 | Form 4 |
| 2026-08-21 | SULLIVAN GODFREY | director | Conversion | 12,500 | 0 | Form 4 |
| 2026-07-17 | Lloyd Thomas J. | officer | Award / grant | 279,627 | 279,627 | Form 4 |
| 2026-06-22 | Mundy Simon | officer | Withheld for tax | 1,514 | 114,057 | Form 4 |
| 2026-06-17 | Staples William | director | Withheld for tax | 26,425 | 754,640 | Form 4 |
| 2026-06-17 | Steward Ian | officer | Withheld for tax | 10,961 | 359,016 | Form 4 |
| 2026-06-17 | Schulman Robin | officer | Withheld for tax | 7,839 | 203,189 | Form 4 |
| 2026-06-17 | Mundy Simon | officer | Withheld for tax | 2,394 | 115,571 | Form 4 |
| 2026-06-17 | BOSTROM SUSAN L | director | Award / grant | 7,555 | 24,874 | Form 4 |
| 2026-06-17 | HENSHALL DAVID J | director | Award / grant | 7,555 | 17,879 | Form 4 |
| 2026-06-17 | BLASING KAREN | director | Award / grant | 7,555 | 104,944 | Form 4 |
| 2026-06-17 | SULLIVAN GODFREY | director | Award / grant | 7,555 | 142,374 | Form 4 |
| 2026-06-17 | Bedi Sundeep | director | Award / grant | 7,555 | 24,874 | Form 4 |
| 2026-06-15 | Mundy Simon | officer | Award / grant | 55,330 | 117,965 | Form 4 |
| 2026-05-14 | Sijbrandij Sytse | director | Conversion | 15,134,451 | 15,134,451 | Form 4 |
| 2026-05-14 | Sijbrandij Sytse | director | Conversion | 15,134,451 | 0 | Form 4 |
| 2026-05-14 | Sijbrandij Sytse | director | Conversion | 15,134,451 | 0 | Form 4 |
| 2026-04-30 | Mundy Simon | officer | Award / grant | 17,592 | 62,635 | Form 4 |
| 2026-04-29 | Schulman Robin | officer | Award / grant | 78,836 | 210,420 | Form 4 |
| 2026-04-29 | Ross Jessica P | officer | Award / grant | 93,852 | 93,852 | Form 4 |
| 2026-04-29 | Schulman Robin | officer | Award / grant | 52,557 | 52,557 | Form 4 |
| 2026-04-29 | Schulman Robin | officer | Award / grant | 93,852 | 93,852 | Form 4 |
| 2026-04-29 | Steward Ian | officer | Award / grant | 234,631 | 234,631 | Form 4 |
| 2026-04-29 | Staples William | director | Award / grant | 436,414 | 781,065 | Form 4 |
| 2026-04-29 | Staples William | director | Award / grant | 290,943 | 290,943 | Form 4 |
| 2026-04-29 | Staples William | director | Award / grant | 469,263 | 469,263 | Form 4 |
| 2026-04-29 | Padisetty Sivaprasad | officer | Award / grant | 234,631 | 234,631 | Form 4 |
| 2026-04-29 | Steward Ian | officer | Award / grant | 197,090 | 369,977 | Form 4 |
| 2026-04-29 | Steward Ian | officer | Award / grant | 131,393 | 131,393 | Form 4 |
| 2026-04-15 | Sijbrandij Sytse | director | Conversion | 116,200 | 116,200 | Form 4 |
| 2026-04-15 | Sijbrandij Sytse | director | Conversion | 116,200 | 15,134,451 | Form 4 |
| 2026-04-15 | Sijbrandij Sytse | director | Conversion | 116,200 | 15,134,451 | Form 4 |
| 2026-03-16 | Schulman Robin | officer | Withheld for tax | 4,359 | 131,584 | Form 4 |
| 2026-03-16 | Steward Ian | officer | Withheld for tax | 3,652 | 172,887 | Form 4 |
| 2026-03-16 | Mundy Simon | officer | Withheld for tax | 2,141 | 45,043 | Form 4 |
| 2026-03-15 | Staples William | director | Withheld for tax | 7,030 | 338,641 | Form 4 |
| 2026-03-11 | Padisetty Sivaprasad | officer | Award / grant | 460,014 | 460,014 | Form 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.