jain.com
ST

Thomas Sanfilippo

C-LevelReporting OfficerActively Reporting
Current role
Chief Technology Officer · WhiteFiber
Current holdings (from latest Form 3/4/5)
WhiteFiber WYFI: 37,793 shares ≈ $391.5K (0.10% of co.) (as of 2026-08-05)
Insider activity since 2025-10
Invested $1.43M (374,092 shares acquired)
↳ notional today: $3.88M
Divested $1.16M (47,684 shares sold)
↳ notional today: $494.0K
→ Net invested $271.1K
↳ net notional: ↑ $3.38M
Change since first tracked filing (not total holdings; see methodology). Prices as of 2026-10-30.

Thomas Sanfilippo, age 62, has served as Chief Technology Officer of WhiteFiber since February 2025, having joined WhiteFiber AI as Chief Technology Officer in September 2024. From July 2023 until September 2024, he was Senior Director of Paperspace's network, data center and infrastructure teams at Digital Ocean. Prior to that, from December 2015 through Digital Ocean's acquisition of Paperspace in July 2023, he led Paperspace's core GPU Computer Cloud and Gradient AI/ML Platform technical organizations.

From January 2015 to September 2016, Sanfilippo served as Senior Architect at Kaseya. From 2014 to 2017, he was Chairman of the Board of Directors of Artisan Asylum, a nonprofit community workspace and education center. His tenure at Microsoft spanned from 2006 to 2014, where he served as Principal Group Development Manager from 2006 to 2012 and Principal Software Development Engineer from June 2012 to April 2014.

Sanfilippo holds a bachelor's degree in physics, mathematics, and philosophy from The Ohio State University. He began his career in 1986.

Biography extracted from WhiteFiber 10-K filed 2026-03-26 View cached copy (2026-08-31)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
WhiteFiberChief Technology Officer2025-08 → present (1y 3mo)5
Show 5 underlying filings
2026-07-31 · WhiteFiber Form 4 filed 2026-10-16
View cached copy (2026-10-17)Live source ↗
2026-02-10 · WhiteFiber Form 4 filed 2026-05-08
View cached copy (2026-09-13)Live source ↗
2026-02-04 · WhiteFiber Form 4/A filed 2026-02-12
View cached copy (2026-09-13)Live source ↗
2025-12-31 · WhiteFiber Form 5/A filed 2026-02-12
View cached copy (2026-09-13)Live source ↗
2025-08-06 · WhiteFiber Form 3 filed 2025-08-06
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 time374,092$1.43M47,684$1.16M↑ Invested $271.1K67$3.88M$494.0K
2026172,072$026,376$679.1K↓ Divested $679.1K61$1.78M$273.3K
2025202,020$1.43M21,308$484.6K↑ Invested $950.2K6$2.09M$220.8K
2025-Q4202,020$1.43M21,308$484.6K↑ Invested $950.2K6$2.09M$220.8K
2026-Q14,416$01,500$29.0K↓ Divested $29.0K3$45.8K$15.5K
2026-Q2-$0955$20.1K↓ Divested $20.1K1$0$9.9K
2026-Q3167,656$023,921$630.1K↓ Divested $630.1K57$1.74M$247.8K

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
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-08-05WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,259$33,162$13.0K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
Show older transactions (47 more)
DateCompanyKindSharesAmount (USD)Value @ last price
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Restricted Stock Units4,412-$45.7K
2026-07-31WhiteFiberOption / RSU exercise · Ordinary Shares, $01 par value4,412-$45.7K
2026-05-07WhiteFiberTax withholding on vesting · Ordinary Shares, $.01 par value955$20,055$9.9K
2026-02-10WhiteFiberTax withholding on vesting · Ordinary Shares, $01 par value1,500$28,965$15.5K
2026-02-04WhiteFiberOption / RSU exercise · Ordinary Shares, $.01 par value4-$46
2026-02-04WhiteFiberOption / RSU exercise · Ordinary Shares, $.01 par value4,412-$45.7K
2025-10-31WhiteFiberTax withholding on vesting · Ordinary Shares, $.01 par value8,226$242,338$85.2K
2025-10-31WhiteFiberGrant / award / vesting · Restricted Stock Unit76,977-$797.5K
2025-10-31WhiteFiberOption / RSU exercise · Ordinary Shares, $.01 par value24,033$717,385$249.0K
2025-10-31WhiteFiberTax withholding on vesting · Ordinary Shares, $.01 par value13,082$242,279$135.5K
2025-10-31WhiteFiberGrant / award / vesting · Restricted Stock Unit76,977-$797.5K
2025-10-31WhiteFiberOption / RSU exercise · Ordinary Shares, $.01 par value24,033$717,385$249.0K