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KY

Yoshifumi Komatsu

Current role
Vice President, Technology · TeraWulf
Current holdings (from latest Form 3/4/5)
TeraWulf WULF: 2,742 shares ≈ $45.2K (5.5 bp of co.) (as of 2007-11-07)
Insider activity since 2004-03
Invested $85.7K (32,932 shares acquired)
↳ notional today: $542.4K
Divested $102.3K (14,466 shares sold)
↳ notional today: $238.3K
→ Net divested $16.6K
↳ net notional: ↑ $304.1K
Change since first tracked filing (not total holdings; see methodology). Prices as of 2026-09-17.

Roles

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

CompanyRoleTenureFilings
TeraWulfVice President, Technology2004-03 → present (22y 6mo)5
Show 5 underlying filings
2007-11-07 · TeraWulf Form 4 filed 2007-11-08
View cached copy (2026-09-13)Live source ↗
2007-05-29 · TeraWulf Form 4 filed 2007-05-31
View cached copy (2026-09-13)Live source ↗
2005-11-03 · TeraWulf Form 4 filed 2005-11-07
View cached copy (2026-09-13)Live source ↗
2005-03-16 · TeraWulf Form 4 filed 2005-03-17
View cached copy (2026-09-13)Live source ↗
2004-03-09 · TeraWulf Form 4 filed 2004-03-11
View cached copy (2026-09-13)Live source ↗

Insider transactions

Totals for this person

BucketInvested (shares)Invested (USD)Divested (shares)Divested (USD)Net directionTxnsInvested @ last priceDivested @ last price
All time32,932$85.7K14,466$102.3K↓ Divested $16.6K26$542.4K$238.3K
200710,000$12.2K3,000$27.0K↓ Divested $14.8K5$164.7K$49.4K
200521,600$71.5K10,800$68.6K↑ Invested $2.9K18$355.8K$177.9K
20041,332$2.1K666$6.7K↓ Divested $4.6K3$21.9K$11.0K
2005-Q16,000$13.1K3,000$16.8K↓ Divested $3.7K4$98.8K$49.4K
2005-Q415,600$58.3K7,800$51.8K↑ Invested $6.5K14$256.9K$128.5K
2007-Q24,000$4.2K-$0↑ Invested $4.2K2$65.9K$0
2007-Q46,000$8.0K3,000$27.0K↓ Divested $19.0K3$98.8K$49.4K

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 2026-09-17); they are a valuation, not a cash flow, and they move every day the market does.

All transactions

DateCompanyKindSharesAmount (USD)Value @ last price
2007-11-07TeraWulfOption / RSU exercise3,000$8,001$49.4K
2007-11-07TeraWulfOpen-market sale3,000$27,000$49.4K
2007-11-07TeraWulfOption / RSU exercise · Common Stock Option (right to buy)3,000-$49.4K
2007-05-29TeraWulfOption / RSU exercise2,000$4,167$32.9K
2007-05-29TeraWulfOption / RSU exercise · Common Stock Option (right to buy)2,000-$32.9K
2005-11-03TeraWulfOption / RSU exercise4,500$13,797$74.1K
2005-11-03TeraWulfOption / RSU exercise3,300$44,550$54.4K
2005-11-03TeraWulfOpen-market sale300$2,055$4.9K
2005-11-03TeraWulfOpen-market sale100$680$1.6K
2005-11-03TeraWulfOpen-market sale100$676$1.6K
2005-11-03TeraWulfOpen-market sale200$1,350$3.3K
2005-11-03TeraWulfOpen-market sale99$662$1.6K
2005-11-03TeraWulfOpen-market sale99$661$1.6K
2005-11-03TeraWulfOpen-market sale1,500$9,990$24.7K
2005-11-03TeraWulfOpen-market sale1,902$12,648$31.3K
2005-11-03TeraWulfOpen-market sale94$621$1.5K
2005-11-03TeraWulfOpen-market sale3,406$22,480$56.1K
2005-11-03TeraWulfOption / RSU exercise · Common Stock Option (right to buy)4,500-$74.1K
2005-11-03TeraWulfOption / RSU exercise · Common Stock Option (right to buy)3,300-$54.4K
2005-03-16TeraWulfOption / RSU exercise3,000$13,125$49.4K
Show older transactions (6 more)
DateCompanyKindSharesAmount (USD)Value @ last price
2005-03-16TeraWulfOpen-market sale2,245$12,572$37.0K
2005-03-16TeraWulfOpen-market sale755$4,220$12.4K
2005-03-16TeraWulfOption / RSU exercise · Common Stock Option (right to buy)3,000-$49.4K
2004-03-09TeraWulfOption / RSU exercise666$2,081$11.0K
2004-03-09TeraWulfOpen-market sale666$6,660$11.0K
2004-03-09TeraWulfOption / RSU exercise · Stock Option (right to buy)666-$11.0K