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.
| Company | Role | Tenure | Filings |
|---|---|---|---|
| WhiteFiber | Chief Technology Officer | 2025-08 → present (1y 3mo) | 5 |
Show 5 underlying filings | |||
Insider transactions
Totals for this person
| Bucket | Invested (shares) | Invested (USD) | Divested (shares) | Divested (USD) | Net direction | Txns | Invested @ last price | Divested @ last price |
|---|---|---|---|---|---|---|---|---|
| All time | 374,092 | $1.43M | 47,684 | $1.16M | ↑ Invested $271.1K | 67 | $3.88M | $494.0K |
| 2026 | 172,072 | $0 | 26,376 | $679.1K | ↓ Divested $679.1K | 61 | $1.78M | $273.3K |
| 2025 | 202,020 | $1.43M | 21,308 | $484.6K | ↑ Invested $950.2K | 6 | $2.09M | $220.8K |
| 2025-Q4 | 202,020 | $1.43M | 21,308 | $484.6K | ↑ Invested $950.2K | 6 | $2.09M | $220.8K |
| 2026-Q1 | 4,416 | $0 | 1,500 | $29.0K | ↓ Divested $29.0K | 3 | $45.8K | $15.5K |
| 2026-Q2 | - | $0 | 955 | $20.1K | ↓ Divested $20.1K | 1 | $0 | $9.9K |
| 2026-Q3 | 167,656 | $0 | 23,921 | $630.1K | ↓ Divested $630.1K | 57 | $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
| Date | Company | Kind | Shares | Amount (USD) | Value @ last price |
|---|---|---|---|---|---|
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-08-05 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,259 | $33,162 | $13.0K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
Show older transactions (47 more)
| Date | Company | Kind | Shares | Amount (USD) | Value @ last price |
|---|---|---|---|---|---|
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Restricted Stock Units | 4,412 | - | $45.7K |
| 2026-07-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $01 par value | 4,412 | - | $45.7K |
| 2026-05-07 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $.01 par value | 955 | $20,055 | $9.9K |
| 2026-02-10 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $01 par value | 1,500 | $28,965 | $15.5K |
| 2026-02-04 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $.01 par value | 4 | - | $46 |
| 2026-02-04 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $.01 par value | 4,412 | - | $45.7K |
| 2025-10-31 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $.01 par value | 8,226 | $242,338 | $85.2K |
| 2025-10-31 | WhiteFiber | Grant / award / vesting · Restricted Stock Unit | 76,977 | - | $797.5K |
| 2025-10-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $.01 par value | 24,033 | $717,385 | $249.0K |
| 2025-10-31 | WhiteFiber | Tax withholding on vesting · Ordinary Shares, $.01 par value | 13,082 | $242,279 | $135.5K |
| 2025-10-31 | WhiteFiber | Grant / award / vesting · Restricted Stock Unit | 76,977 | - | $797.5K |
| 2025-10-31 | WhiteFiber | Option / RSU exercise · Ordinary Shares, $.01 par value | 24,033 | $717,385 | $249.0K |
