T2 Biosystems, Inc. (TTOO) Ownership
TTOO ownership summary
as of October 21, 2026- Institutions
- 0.0% of shares outstanding
- Insiders
- 0.03% of shares outstanding
- Shares outstanding
- 28.0M
- Float
- 13.0M shares available to trade
- Short interest
- 4.87% 827K shares short
- Days to cover
- 0.71 short interest down 12.3% vs prior month
- Insiders 0.03%
- Other investors 99.97%
TTOO top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Armistice Capital, LLC | 4.98% | 1.4M | $1,117 | −262,000 (−15.8%) | September 30, 2024 |
| 2 | Vanguard Group Inc | 1.39% | 390K | $312 | +77,667 (+24.8%) | September 30, 2024 |
| 3 | Geode Capital Management, LLC | 0.32% | 91K | $73 | −39,509 (−30.3%) | September 30, 2024 |
| 4 | BlackRock Inc | 0.27% | 77K | $61 | −1,471 (−1.9%) | September 30, 2024 |
| 5 | State Street Corp | 0.23% | 64K | $51 | — | September 30, 2024 |
| 6 | Susquehanna International Group, LLP | 0.16% | 45K | $36 | +3,817 (+9.2%) | September 30, 2024 |
| 7 | Millennium Management LLC | 0.14% | 39K | $31 | +39,140 (0.0%) | September 30, 2024 |
| 8 | Northern Trust Corp | 0.10% | 27K | $22 | −11,737 (−30.2%) | September 30, 2024 |
| 9 | Kingswood Wealth Advisors LLC | 0.07% | 20K | $16 | +20,000 (0.0%) | December 31, 2024 |
| 10 | Goldman Sachs Group Inc | 0.05% | 15K | $12 | +45 (+0.3%) | September 30, 2024 |
| 11 | Royal Bank of Canada | 0.01% | 4,001 | $3 | +1,146 (+40.1%) | September 30, 2024 |
| 12 | Tower Research Capital LLC | 0.01% | 2,399 | $2 | −5,268 (−68.7%) | September 30, 2024 |
| 13 | Group One Trading, LP | <0.01% | 289 | $0 | −721 (−71.4%) | September 30, 2024 |
| 14 | Advisor Group Holdings, Inc. | <0.01% | 205 | $0 | — | September 30, 2024 |
| 15 | Barclays PLC | <0.01% | 101 | $0 | +101 (0.0%) | September 30, 2024 |
| 16 | International Assets Investment Management, LLC | <0.01% | 65 | $0 | +32 (+97.0%) | September 30, 2024 |
| 17 | Bank of America Corp | <0.01% | 56 | $0 | −72 (−56.2%) | September 30, 2024 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.00% | 14 | $0 | −14 (−50.0%) | September 30, 2024 |
| 19 | U.S. Bancorp | 0.00% | 3 | $0 | — | September 30, 2024 |
| 20 | UBS Group AG | 0.00% | 1 | $0 | — | September 30, 2024 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 8 holders added 142K shares and 8 cut 321K.
TTOO top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Total Stock Mkt Idx Inv | 0.55% | 155K | $124 | — | December 31, 2024 |
| 2 | Spartan Total Market Index Pool E | 0.24% | 66K | $53 | +57,143 (+646.9%) | December 31, 2024 |
| 3 | Extended Equity Market Fund K | 0.14% | 41K | $32 | −558 (−1.4%) | December 31, 2024 |
| 4 | Fidelity Extended Market Index | 0.13% | 36K | $29 | −293 (−0.8%) | December 31, 2024 |
| 5 | Fidelity Total Market Index | 0.08% | 21K | $17 | — | December 31, 2024 |
| 6 | NT Ext Equity Mkt Idx Fd - L | 0.06% | 16K | $13 | — | December 31, 2024 |
| 7 | Northern Trust Extended Eq Market Idx | 0.06% | 16K | $13 | — | December 31, 2024 |
| 8 | NT Ext Equity Mkt Idx Fd - NL | 0.04% | 11K | $9 | — | December 31, 2024 |
| 9 | Fidelity Nasdaq Composite Index | 0.03% | 9,232 | $7 | — | December 31, 2024 |
| 10 | Fidelity Series Total Market Index | 0.03% | 8,738 | $7 | — | December 31, 2024 |
| 11 | NT Ext Equity Mkt Idx Fd - DC - NL - T2 | 0.03% | 8,429 | $7 | −139 (−1.6%) | December 31, 2024 |
| 12 | Extended Equity Market Fund M | 0.02% | 5,266 | $4 | +51 (+1.0%) | December 31, 2024 |
| 13 | State St US Extended Mkt Indx NL Cl C | 0.02% | 4,520 | $4 | — | January 31, 2025 |
| 14 | NT Ext Eq Mkt Indx Fd DC Lend T3 | 0.01% | 3,840 | $3 | +3,840 (0.0%) | December 31, 2024 |
| 15 | NT Ext Eq Mkt Indx Fd DC Lend T4 | 0.01% | 3,840 | $3 | +3,840 (0.0%) | December 31, 2024 |
| 16 | NT Ext Eq Mkt Indx Fd DC Lending Tier 5 | 0.01% | 2,487 | $2 | +4 (+0.2%) | September 30, 2024 |
| 17 | BNYM Mellon SL Market Completion UC1 | 0.01% | 1,873 | $1 | +34 (+1.8%) | December 31, 2024 |
| 18 | SSgA U.S. Total Market Index Strategy | 0.01% | 1,854 | $1 | +1,848 (+30,800.0%) | June 30, 2024 |
| 19 | Northern Trust Wilshire 5000 | <0.01% | 394 | $0 | — | December 31, 2024 |
| 20 | Spartan Extended Market Index Pool E | <0.01% | 293 | $0 | −5,425 (−94.9%) | December 31, 2024 |
Funds report holdings monthly or quarterly; dates differ by fund.
TTOO insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-09-13 | David B Elsbree | Sell | $2.42 | 55 | $133 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
TTOO shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns TTOO
Institutional investors own 0.0% of T2 Biosystems's shares and insiders 0.03%. The largest holder is Armistice Capital, LLC with 4.98% of the shares (1.4M), as of September 30, 2024. Among the top 20 institutions, 8 added shares and 8 reduced their stake in the latest filings. Short interest is 4.87% of the float, or 0.71 days of average trading volume. The share count rose 6,292.5% since 2013.
Related: TTOO analyst forecast, TTOO key metrics. See the TTOO stock overview for the latest quote and news.
TTOO ownership FAQ
Who owns the most T2 Biosystems stock?
The largest shareholders of T2 Biosystems are Armistice Capital, LLC (4.98%), Vanguard Group Inc (1.39%), Geode Capital Management, LLC (0.32%), BlackRock Inc (0.27%), State Street Corp (0.23%).
What percentage of T2 Biosystems is owned by institutions?
Institutions hold 0.0% of T2 Biosystems's shares outstanding; insiders hold 0.03%.
Which funds own T2 Biosystems?
The largest fund holders of T2 Biosystems are Vanguard Total Stock Mkt Idx Inv (0.55%), Spartan Total Market Index Pool E (0.24%), Extended Equity Market Fund K (0.14%), Fidelity Extended Market Index (0.13%), Fidelity Total Market Index (0.08%).
What is T2 Biosystems's short interest?
827K shares of T2 Biosystems were sold short, 4.87% of the float; at the average daily volume it would take 0.71 days to cover.
Are insiders buying or selling T2 Biosystems?
Of the latest 1 reported insider transactions in T2 Biosystems (since September 13, 2024), 0 were purchases and 1 were sales.
How many shares of T2 Biosystems are outstanding?
T2 Biosystems has 28.0M shares outstanding, of which 13.0M are in the public float.