Seer Inc
Ownership
Ownership Structure
Who owns Seer Inc (SEER)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 73.2% of the shares are freely tradable; institutional investors hold 51.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| SoftBank Group Corp | 9.27 | 5,135,383 | +0.0 | 06/30/2026 |
| Siren, L.L.C. | 4.44 | 2,458,673 | -38.5 | 03/31/2026 |
| Acadian Asset Management LLC | 3.75 | 2,074,709 | +101,105.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.54 | 1,958,996 | +0.0 | 03/31/2026 |
| BlackRock Inc | 3.29 | 1,821,604 | -0.3 | 03/31/2026 |
| Renaissance Technologies Corp | 1.76 | 976,688 | -7.1 | 03/31/2026 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | 1.49 | 825,000 | +0.0 | 03/31/2026 |
| AJU IB Investment Co Ltd | 1.47 | 816,375 | +0.0 | 03/31/2026 |
| Citadel Advisors Llc | 0.94 | 519,310 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.21 | 1,221,716 | -12.1 | 07/31/2026 |
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 |
|---|---|---|---|---|---|
| Langer Robert | Director | 821,025 | 1,559,948 $ | Jul 28, 2026 | direct |
| Horn David R. | PRESIDENT & CFO | 486,650 | 924,635 $ | Aug 18, 2026 | direct |
| Mcguire Terrance | Director | 128,566 | 244,275 $ | Jul 28, 2026 | direct |
| Gulyani Meeta | Director | 124,043 | 235,682 $ | Jul 28, 2026 | direct |
| Roelofs Nicolas H PHD | Director | 91,496 | 173,842 $ | Jul 28, 2026 | direct |
| Nishar Dipchand | Director | 75,544 | 143,534 $ | Jul 28, 2026 | direct |
| Ro Isaac | Director | 53,375 | 101,413 $ | Jul 28, 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 |
|---|---|---|---|---|---|---|
| Aug 18, 2026 | Horn David R. | PRESIDENT & CFO | Sell | 7,309 | 2.03 | 14,810 |
| Jul 28, 2026 | Gulyani Meeta | Director | Other | 16,500 | 0.00 | – |
| Jul 28, 2026 | Ro Isaac | Director | Other | 12,375 | 0.00 | – |
| Jul 28, 2026 | Nishar Dipchand | Director | Other | 16,500 | 0.00 | – |
| Jul 28, 2026 | Roelofs Nicolas H PHD | Director | Other | 16,500 | 0.00 | – |
| Jul 28, 2026 | Langer Robert | Director | Other | 16,500 | 0.00 | – |
| Jul 28, 2026 | Mcguire Terrance | Director | Other | 16,500 | 0.00 | – |
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: September 18, 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.