Summary
Updated Aug 31, 2026
Thomas J. Chamberlain is President of IF Bancorp, Inc. (IROQ). 2 SEC Form 4 filings on record going back to 2024, most recently on 13 March 2026. Most recent open-market trade: bought $5K of IROQ on 12 November 2024. Lifetime open-market purchases: $12K. Historical track record: 5/5 stars across 3 tracked purchases.
Recent Transactions
8Every recent SEC Form 4 transaction Thomas J. Chamberlain has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★★ (5/5) |
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 100% |
| 90-day win rate | 100% |
| Avg 5-day return | -0.19% |
| Avg 30-day return | +12.07% |
| Avg 90-day return | +13.20% |
| Best 30-day return | +12.07% |
Trading Pattern
InsiderAlpha's records for Thomas J. Chamberlain go back to 2024: 2 primary Form 4 filings, an average of 0.7 per year. The typical open-market purchase is $4K (3 buys totaling $12K). The largest single buy on record is $5K of IROQ in 2024. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Most Active Insiders Right Now
Thomas J. Chamberlain has no co-filers on record, so these are insiders with the largest open-market activity across the market in the last 90 days.
- Tony W. Lee - $497.40M of PRMB open-market activity in the last 90 days
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- Niccolo Camerana - $478.31M of STNG open-market activity in the last 90 days
- Kenneth Bryan Dart - $468.21M of FLUT open-market activity in the last 90 days
- RA CAPITAL MANAGEMENT, L.P. - $430.69M of PBLS open-market activity in the last 90 days
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Frequently Asked Questions
Who is Thomas J. Chamberlain?
Thomas J. Chamberlain is a corporate insider, tracked as President of IF Bancorp, Inc. (IROQ). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Thomas J. Chamberlain last file a Form 4?
The most recent primary Form 4 on record is dated 13 March 2026, one of 2 filings going back to 2024.
Has Thomas J. Chamberlain been buying or selling stock?
Recorded transactions: 3 open-market purchases ($12K) and 0 open-market sales across all tracked filings.
How accurate is Thomas J. Chamberlain's historical track record?
Across 3 tracked purchases, Thomas J. Chamberlain averaged +12.1% avg 30-day return with a 100% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.
Where can I see all of Thomas J. Chamberlain's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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