Who owns TSS (TSSI)?
73 holders named in SEC filings declare between 51.9% and 62.0% of TSS' shares outstanding, as of Jun 30, 2026. The largest are Peter H. Woodward (10.7%), BlackRock (8.2%) and Vanguard (4.6%); the five largest hold 29.7% together. Another 55 institutions hold small positions worth 0.79%. At least 37.2% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 17.9% and sold 6.5% of the shares, a net purchase of 11.5%; 36 opened a position, 50 added, 19 reduced and 20 sold out. Biggest buyers: BlackRock (+551,400 shares) and Driehaus Capital Management LLC (+536,314 shares). Biggest sellers: Marshall Wace (-324,962) and UBS (-227,726). Schedule 13D/G filings since Mar 31, 2026: BlackRock, Inc. raised its stake to 6.6% on Jun 30, 2026 and JANE STREET GROUP, LLC crossed 5% (5.2%) on May 26, 2026. Directors and officers, from their latest Form 4: Peter H. Woodward (10.7%), Darryll E. Dewan (1.6%) and Karl Todd Marrott (1.4%). Over time, 120 managers declared TSS in their 13F for Q2 2026, against 1 for Q3 2024: together at most 46.6% of the shares outstanding, against 0.05%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| Peter H. Woodward | Form 4 | 10.7% | Jun 2, 2026 | — |
| BlackRock | 13F | 8.2% | Jun 30, 2026 | Q4 2024 |
| Vanguard | 13F | 4.6% | Jun 30, 2026 | Q4 2024 |
| Jane Street | 13F | 3.7% | Jun 30, 2026 | Q3 2025 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 13F | 2.4% | Jun 30, 2026 | Q1 2026 |
| Geode Capital | 13F | 2.2% | Jun 30, 2026 | Q4 2024 |
| D. E. Shaw | 13F | 1.9% | Jun 30, 2026 | Q1 2025 |
| Driehaus Capital Management LLC | 13F | 1.9% | Jun 30, 2026 | Q2 2026 |
| LPL Financial LLC | 13F | 1.7% | Jun 30, 2026 | Q2 2025 |
| State Street | 13F | 1.7% | Jun 30, 2026 | Q1 2025 |
| Darryll E. Dewan | Form 4 | 1.6% | May 6, 2026 | — |
| Karl Todd Marrott | Form 4 | 1.4% | Jun 27, 2026 | — |
| Goldman Sachs | 13F | 1.3% | Jun 30, 2026 | Q4 2024 |
| ALGERT GLOBAL LLC | 13F | 1.2% | Jun 30, 2026 | Q1 2026 |
| Daniel M. Chism | Form 4 | 1.2% | Apr 14, 2026 | — |
| UBS | 13F | 1.0% | Jun 30, 2026 | Q4 2024 |
| Kieran Brennan | Form 4 | 0.96% | Jun 1, 2026 | — |
| Value Aligned Research Advisors, LLC | 13F | 0.93% | Jun 30, 2026 | Q4 2024 |
| WELLS FARGO & COMPANY/MN | 13F | 0.79% | Jun 30, 2026 | Q4 2024 |
| Millennium | 13F | 0.78% | Jun 30, 2026 | Q1 2025 |
| Northern Trust | 13F | 0.69% | Jun 30, 2026 | Q4 2024 |
| AQR | 13F | 0.63% | Jun 30, 2026 | Q3 2025 |
| Jump Financial, LLC | 13F | 0.62% | Jun 30, 2026 | Q2 2026 |
| Alyeska Investment Group, L.P. | 13F | 0.55% | Jun 30, 2026 | Q2 2026 |
| Richard M. Metzler | Form 4 | 0.54% | Jan 14, 2026 | — |
TSS institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2024 | 51 | 12.7% | $33.9M | 71.9% |
| Q4 2025 | 90 | 29.6% | $60.4M | 39.2% |
| Q2 2026 | 120 | 46.6% | $160.8M | 42.3% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.