BY
Kistner William G, BY's Director, spent $3.2K of their own money on 100 shares at $32, growing their stake 1%.
+$3.2K
100 sh @ $32
KISTNER WILLIAM G
Director · SEC CIK 1739310
Insider at
BY BYLINE BANCORP, INC.
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Buy track record
How this insider's open-market purchases have performed100%
of buys now in profit
21 up · 0 down
Avg return since buy+76.7%
Median return+62.6%
Best trade+274.7%
Worst trade+10.8%
Buys scored21
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+0.3%
38% won · 21 trades
After 3 months
+3.2%
60% won · 20 trades
After 6 months
+9.1%
75% won · 20 trades
After 12 months
+15.4%
65% won · 17 trades
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| May 4, 2026 | BY | $32 | $3.2K | +0.7% | +4.9% | — | — | — | +10.8% | |
| Oct 28, 2025 | BY | $28 | $1.8K | +0.5% | +2.6% | +13.9% | +22.1% | — | +30.9% | |
| Aug 8, 2025 | BY | $26 | $1.5K | +0.4% | +14.4% | +7.0% | +31.2% | — | +39.0% | |
| Jun 13, 2025 | BY | $25 | $4.1K | +1.2% | +12.8% | +14.5% | +23.0% | — | +42.4% | |
| Mar 4, 2025 | BY | $28 | $1.8K | +0.5% | −12.9% | −6.4% | +6.2% | +17.1% | +30.2% | |
| Nov 20, 2024 | BY | $31 | $1.5K | +0.4% | −5.5% | −4.3% | −11.5% | −11.6% | +16.9% | |
| Aug 26, 2024 | BY | $28 | $1.7K | +0.4% | −4.9% | +15.8% | +3.5% | +7.4% | +31.8% | |
| Jun 14, 2024 | BY | $22 | $1.1K | +0.4% | +16.5% | +19.4% | +40.4% | +14.3% | +62.6% | |
| Mar 11, 2024 | BY | $21 | $1.3K | +0.4% | −3.9% | +6.0% | +23.1% | +25.6% | +73.5% | |
| Nov 21, 2023 | BY | $21 | $10.3K | +3.8% | +17.7% | +4.2% | +17.6% | +56.7% | +80.9% | |
| Aug 16, 2023 | BY | $21 | $12.8K | +4.8% | −6.2% | −2.4% | +0.9% | +26.5% | +73.2% | |
| Aug 25, 2022 | BY | $23 | $4.1K | +1.7% | −6.8% | −1.1% | +9.2% | −7.2% | +64.6% | |
| May 9, 2022 | BY | $23 | $18.7K | +7.9% | +2.4% | −1.9% | −4.2% | −24.6% | +59.8% | |
| Aug 13, 2021 | BY | $26 | $66.6K | +35% | −9.0% | +6.9% | +6.4% | −3.4% | +49.2% | |
| Jun 1, 2021 | BY | $23 | $30.3K | +21% | −2.0% | +3.5% | +11.3% | +7.6% | +62.3% | |
| May 4, 2021 | BY | $23 | $27.5K | +24% | −1.9% | +4.5% | +16.9% | +6.6% | +65.7% | |
| May 6, 2020 | BY | $10 | $17.6K | +52% | +41.6% | +26.9% | +28.5% | +127.1% | +274.7% | |
| Mar 12, 2020 | BY | $12 | $7.3K | +22% | −4.5% | +8.8% | +6.0% | +94.5% | +239.7% | |
| Feb 26, 2020 | BY | $19 | $3.7K | +8.0% | −41.6% | −34.5% | −30.4% | +9.2% | +109.7% | |
| May 16, 2019 | BY | $20 | $985 | +2.0% | −2.5% | −10.7% | −5.6% | −45.2% | +99.4% | |
| Apr 30, 2019 | BY | $20 | $49.1K | NEW | −4.3% | −6.0% | −13.5% | −38.2% | +94.1% |
How this is calculated. We score only open-market purchases (SEC code
P) — the buys that carry real signal. Each trade's return is measured from the adjusted closing price on the purchase date to the latest close, accounting for stock splits and dividends. The 1M/3M/6M/12M columns show the same trade's return after each fixed holding period; a dash means that horizon hasn't elapsed yet or isn't priceable. Sales are excluded because insiders sell for many routine reasons. With only 21 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$267K
21 trades
Open-market sells
$0
0 trades
Net flow
+$267K
Net buying
Total filings
23
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstBY
Kistner William G, BY's Director, spent $1.8K of their own money on 65 shares at $28.
+$1.8K
65 sh @ $28
BY
Kistner William G, BY's Director, spent $1.5K of their own money on 60 shares at $26.
+$1.5K
60 sh @ $26
BY
Kistner William G, BY's Director, spent $4.1K of their own money on 164 shares at $25, growing their stake 1%.
+$4.1K
164 sh @ $25
BY
Kistner William G, BY's Director, spent $1.8K of their own money on 65 shares at $28.
+$1.8K
65 sh @ $28
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BY
Kistner William G, BY's Director, spent $1.5K of their own money on 50 shares at $31.
+$1.5K
50 sh @ $31
BY
Kistner William G, BY's Director, spent $1.7K of their own money on 60 shares at $28.
+$1.7K
60 sh @ $28
BY
Kistner William G, BY's Director, spent $1.1K of their own money on 50 shares at $22.
+$1.1K
50 sh @ $22
BY
Kistner William G, BY's Director, spent $1.3K of their own money on 60 shares at $21.
+$1.3K
60 sh @ $21
BY
Kistner William G, BY's Director, spent $10.3K of their own money on 500 shares at $21, growing their stake 4%.
+$10.3K
500 sh @ $21
BY
Kistner William G, BY's Director, spent $12.8K of their own money on 600 shares at $21, growing their stake 5%.
+$12.8K
600 sh @ $21
BY
+$0
1,036 sh
BY
Kistner William G, BY's Director, spent $4.1K of their own money on 180 shares at $23, growing their stake 2%.
+$4.1K
180 sh @ $23
BY
+$0
991 sh
BY
Kistner William G, BY's Director, spent $18.7K of their own money on 800 shares at $23, growing their stake 8%.
+$18.7K
800 sh @ $23
BY
Kistner William G, BY's Director, spent $66.6K of their own money on 2,600 shares at $26, growing their stake 35%.
+$66.6K
2,600 sh @ $26
BY
Kistner William G, BY's Director, spent $30.3K of their own money on 1,300 shares at $23, growing their stake 21%.
+$30.3K
1,300 sh @ $23
BY
Kistner William G, BY's Director, spent $27.5K of their own money on 1,200 shares at $23, growing their stake 24%.
+$27.5K
1,200 sh @ $23
BY
Kistner William G, BY's Director, spent $17.6K of their own money on 1,700 shares at $10, growing their stake 52%.
+$17.6K
1,700 sh @ $10
BY
Kistner William G, BY's Director, spent $7.3K of their own money on 600 shares at $12, growing their stake 22%.
+$7.3K
600 sh @ $12
BY
Kistner William G, BY's Director, spent $3.7K of their own money on 200 shares at $19, growing their stake 8%.
+$3.7K
200 sh @ $19
BY
Kistner William G, BY's Director, spent $985 of their own money on 50 shares at $20, growing their stake 2%.
+$985
50 sh @ $20
BY
Kistner William G, BY's Director, spent $49.1K of their own money on 2,450 shares at $20, opening a brand-new position.
+$49.1K
2,450 sh @ $20
Frequently asked questions
How is KISTNER WILLIAM G's win rate calculated?
We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.
Why are some buys not included in the score?
A purchase is excluded if we can't price it — for example if the ticker is missing from the filing, the company has been delisted, or the security isn't a common stock we can match to market data. Excluded counts are shown next to the scored total.
What do the 1M / 3M / 6M / 12M columns mean?
They show each purchase's return after a fixed holding period — one, three, six, and twelve months from the buy date — using split- and dividend-adjusted prices. This separates good entry timing from simply holding a long-running winner. A dash means that horizon hasn't elapsed yet for that trade, or the stock couldn't be priced at that date.
Does a high win rate mean I should copy this insider?
No. Past performance does not predict future results, sample sizes are often small, and an insider's edge in their own company doesn't transfer to yours. This is context, not a recommendation. InsiderSource is not investment advice.
Where does this data come from?
Trades come from KISTNER WILLIAM G's SEC Form 4 filings on EDGAR. Prices come from public market data and are split/dividend-adjusted. Always verify against the original filings before acting.