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Jon Gerlach

CFOC-LevelFounding InsiderReporting Officer
Current role
V.P. Finance and CFO · TeraWulf
Reported pay · FY2018
TeraWulf · $166.6K (salary $158.7K)
Current holdings (from latest Form 3/4/5)
TeraWulf WULF: - shares (as of 2021-12-13)
Insider activity since 2008-04
Invested $37.8K (32,500 shares acquired)
↳ notional today: $381.2K
Divested $338.2K (21,250 shares sold)
↳ notional today: $249.3K
→ Net divested $300.4K
↳ net notional: ↑ $132.0K
Change since first tracked filing (not total holdings; see methodology). Prices as of 2026-10-30.

Jon Gerlach was named Chief Financial Officer, Vice President Finance, and Secretary of IKONICS Corporation in August 2003. Prior to this role, he served as Finance Manager at Sappi Limited in Cloquet and held various positions with Potlatch's Minnesota Pulp and Paper Division from 1994 to 2002, culminating as Division Manager of Business Planning. His earlier career included positions as Financial Analyst with Ernst & Young LLP's audit department and with Maurices Incorporated.

Gerlach holds an MBA from the University of Minnesota—Duluth (2001) and a B.S. in Accounting from St. John's University (1989).

Biography extracted from TeraWulf DEF 14A filed 2014-03-21 View cached copy (2026-09-27)Live source ↗

Roles

Contiguous filings for the same role are collapsed into a single tenure span. Click a row to see the underlying filings.

CompanyRoleTenureFilings
TeraWulfV.P. Finance and CFO2003-09 → present (23y 2mo)4
Show 4 underlying filings
2021-12-13 · TeraWulf Form 4 filed 2021-12-13
View cached copy (2026-09-13)Live source ↗
2021-01-01 · TeraWulf Form 4 filed 2021-01-07
View cached copy (2026-09-13)Live source ↗
2008-04-30 · TeraWulf Form 4 filed 2008-05-01
View cached copy (2026-09-13)Live source ↗
2003-09-30 · TeraWulf Form 3 filed 2003-10-02
View cached copy (2026-09-13)Live source ↗

Compensation

YearRole as filedSalaryIncentiveOtherTotalSource
2018—$158.7K$0$7.9K$166.6KView cached copy (2026-09-27)Live source ↗
2017Chief Financial Officer and Vice President—Finance$158.7K$0$7.9K$166.6KView cached copy (2026-09-27)Live source ↗
2016Chief Financial Officer and Vice President—Finance$154.0K$0$7.7K$161.7KView cached copy (2026-09-27)Live source ↗
2015Chief Financial Officer and$148.0K$0$7.4K$155.4KView cached copy (2026-09-27)Live source ↗
2012Chief Financial Officer and Vice President Finance$131.7K—$6.6K$138.2KView cached copy (2026-09-27)Live source ↗
2011Chief Financial Officer and Vice President Finance$127.8K—$6.4K$134.2KView cached copy (2026-09-27)Live source ↗
2010Chief Financial Officer and Vice President Finance$121.7K$5.0K$6.3K$133.0KView cached copy (2026-09-27)Live source ↗
2009Chief Financial Officer and Vice President Finance$119.5K$6.0K—$125.5KView cached copy (2026-09-27)Live source ↗

As reported in the company's DEF 14A Summary Compensation Table (SEC Reg S-K Item 402(c)). Stock and option awards are grant-date fair values — what the award was worth on the day it was granted, not cash received and not what it is worth now. Every row here reconciles: its columns add up to the total the filing printed.

Insider transactions

Totals for this person

BucketInvested (shares)Invested (USD)Divested (shares)Divested (USD)Net directionTxnsInvested @ last priceDivested @ last price
All time32,500$37.8K21,250$338.2K↓ Divested $300.4K5$381.2K$249.3K
202110,000$021,250$338.2K↓ Divested $338.2K3$117.3K$249.3K
200822,500$37.8K-$0↑ Invested $37.8K2$263.9K$0
2008-Q222,500$37.8K-$0↑ Invested $37.8K2$263.9K$0
2021-Q110,000$0-$0Flat1$117.3K$0
2021-Q4-$021,250$338.2K↓ Divested $338.2K2$0$249.3K

Invested = shares acquired (buys, grants, option exercises) — insider adding to the position. Divested = shares reduced (sells, dispositions, tax-withholding) — cash flowing TO the insider. Net direction shows which side wins on dollar terms in each bucket. % of holder's stake not yet computed (pending Form 3/4 holdings ingest). See methodology. The two @ last price columns restate the same share counts at the most recent share price we read (close of 2026-10-30); they are a valuation, not a cash flow, and they move every day the market does.

All transactions

DateCompanyKindSharesAmount (USD)Value @ last price
2021-12-13TeraWulfSale to issuer (buyback)10,000$338,200$117.3K
2021-12-13TeraWulfSale to issuer (buyback)11,250-$132.0K
2021-01-01TeraWulfGrant / award / vesting10,000-$117.3K
2008-04-30TeraWulfOption / RSU exercise11,250$37,800$132.0K
2008-04-30TeraWulfOption / RSU exercise · Stock Option (right to buy)11,250-$132.0K