TSS, Inc.
Ownership
Ownership Structure
Who owns TSS, Inc. (TSSI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 76.6% of the shares are freely tradable; institutional investors hold 46.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.23 | 2,322,290 | +31.1 | 06/30/2026 |
| Jane Street Group LLC | 3.71 | 1,047,184 | +59.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.43 | 966,509 | -0.2 | 06/30/2026 |
| Silvercrest Asset Management Group LLC | 2.42 | 681,700 | +63.7 | 06/30/2026 |
| Geode Capital Management, LLC | 2.22 | 626,884 | +8.9 | 06/30/2026 |
| D. E. Shaw & Co LP | 1.92 | 542,913 | +192.0 | 06/30/2026 |
| Driehaus Capital Management LLC | 1.90 | 536,314 | +0.0 | 06/30/2026 |
| LPL Financial Corp | 1.72 | 486,260 | +41.8 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Russell 2000 ETF | 2.51 | 708,366 | -1.1 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.41 | 679,327 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Chism Daniel M | Chief Financial Officer | 322,898 | 2,227,996 $ | Jun 7, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 7, 2026 | Chism Daniel M | Chief Financial Officer | Other | 15,317 | 13.38 | 204,941 |
| Apr 22, 2026 | Darryll E Dewan | CEO | Sell | 50,000 | 16.00 | 800,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.