67 tracked 13F filers disclose a position in OSS as of the latest SEC 13F filings, a combined $61.6M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | $7.3M | 960K | →First observed position No prior filed position | Q1 2026 | |
| 2 | JANE STREET GROUP, LLC | $6.6M | 875K | ▲+45% Added · +271K sh | Q1 2026 | |
| 3 | BlackRock, Inc. | $4.5M | 597K | ▲+335% Added · +460K sh | Q1 2026 | |
| 4 | MORGAN STANLEY | $3.3M | 432K | ▲+594% Added · +370K sh | Q1 2026 | |
| 5 | MARSHALL WACE, LLP | $3.2M | 419K | ▲+53% Added · +145K sh | Q1 2026 | |
| 6 | Palisades Investment Partners, LLC | $7.5M | 414K | ▲New +414K sh | Q2 2026 | |
| 7 | UBS Group AG | $3.1M | 407K | ▲58× Added · +400K sh | Q1 2026 | |
| 8 | MILLENNIUM MANAGEMENT LLC | $3.0M | 401K | ▲+865% Added · +359K sh | Q1 2026 | |
| 9 | CITADEL ADVISORS LLC | $2.7M | 357K | ▲+145% Added · +211K sh | Q1 2026 | |
| 10 | RENAISSANCE TECHNOLOGIES LLC | $2.0M | 260K | ▼−31% Reduced · −116K sh | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $1.9M | 252K | ▲+5.8% Added · +14K sh | Q1 2026 | |
| 12 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.8M | 236K | ▼−8.8% Reduced · −23K sh | Q1 2026 | |
| 13 | Trexquant Investment LP | $1.6M | 218K | ▼−15% Reduced · −39K sh | Q1 2026 | |
| 14 | SEI INVESTMENTS CO | $1.3M | 167K | ▲+67% Added · +67K sh | Q1 2026 | |
| 15 | VANGUARD FIDUCIARY TRUST CO | $975K | 129K | →First observed position No prior filed position | Q1 2026 | |
| 16 | STATE STREET CORP | $770K | 102K | ▲+20% Added · +17K sh | Q1 2026 | |
| 17 | GOLDMAN SACHS GROUP INC | $583K | 77K | ▼−40% Reduced · −52K sh | Q1 2026 | |
| 18 | CITIGROUP INC | $573K | 76K | ▲17× Added · +71K sh | Q1 2026 | |
| 19 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $559K | 74K | ▲New +74K sh | Q1 2026 | |
| 20 | OXFORD ASSET MANAGEMENT LLP | $488K | 64K | ▲New +64K sh | Q1 2026 | |
| 21 | 683 Capital Management, LLC | $454K | 60K | ▼−34% Reduced · −30K sh | Q1 2026 | |
| 22 | Squarepoint Ops LLC | $443K | 58K | ▼−60% Reduced · −89K sh | Q1 2026 | |
| 23 | XTX Topco Ltd | $385K | 51K | ▼−7.2% Reduced · −4K sh | Q1 2026 | |
| 24 | NORTHERN TRUST CORP | $356K | 47K | ▲+12% Added · +5K sh | Q1 2026 | |
| 25 | Penbrook Management LLC | $707K | 39K | ▼−17% Reduced · −8K sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 10 funds opened a new position in OSS and 7 added to an existing one, while 13 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| AMAZON.COM INCAMZN | 28 funds | $9.1B |
| ALPHABET INC-CL AGOOGL | 28 funds | $5.7B |
| NVIDIA CORPNVDA | 27 funds | $16.6B |
| APPLE INCAAPL | 27 funds | $12.0B |
| META PLATFORMS INC-CLASS AMETA | 27 funds | $5.1B |
| ALPHABET INC-CL CGOOG | 27 funds | $4.6B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 27 funds | $2.4B |
| MICROSOFT CORPMSFT | 26 funds | $8.9B |
| PALANTIR TECHNOLOGIES INC-APLTR | 26 funds | $3.1B |
| CHEVRON CORPCVX | 26 funds | $2.6B |
| LOCKHEED MARTIN CORPLMT | 26 funds | $1.3B |
| VERIZON COMMUNICATIONS INCVZ | 26 funds | $788.1M |
Ranked by how many of OSS's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 26, 2026 | BASSETT DAVID GEORGE | Director | Sell (S) | 8K | $141K |
| May 26, 2026 | Herbets Mitchell H | Director | Sell (S) | 5K | $88K |
| May 26, 2026 | Matz Gregory W | Director | Sell (S) | 8K | $140K |
| Aug 14, 2024 | Manko Joseph M. Jr. | Director | Buy (P) | 25K | $50K |
| Aug 13, 2024 | Manko Joseph M. Jr. | Director | Buy (P) | 50K | $97K |
| Jan 22, 2024 | Cooper Steve D | 10% Owner | Sell (S) | 206K | $373K |
| Aug 16, 2023 | KNOWLES MICHAEL | Chief Executive Officer | Buy (P) | 1K | $2K |
| Aug 15, 2023 | Matz Gregory W | Director | Buy (P) | 3K | $4K |
| Aug 14, 2023 | RAUN DAVID | Director | Buy (P) | 5K | $10K |
| Jul 31, 2023 | Cooper Steve D | 10% Owner | Sell (S) | 204K | $570K |
| Apr 21, 2023 | Cooper Steve D | 10% Owner | Sell (S) | 204K | $472K |
| Dec 20, 2022 | Cooper Steve D | 10% Owner | Sell (S) | 200K | $541K |
Connected entities for OSS
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OSS/capital-change-brief"
Use Arkolith's capital_change_brief for OSS. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OSS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.