Who owns TATT (TATT)
Which tracked institutional funds hold TATT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TATT company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
18 tracked funds added or opened TATT while 28 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TATT’s largest tracked holder by dollar value, MEITAV INVESTMENT HOUSE LTD, sizes it at 0.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.5pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in TATT divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 77 tracked filers holding TATT, 42 increased or opened the position and 47 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TATT between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- Stephens Investment Management Group LLC$8M
- Informed Momentum Co LLC$3M
- Global IMC LLC$3M
- Knights of Columbus Asset Advisors LLC$1M
- Walleye Capital LLC$1M
- Illumine Investment Management, LLC$825K
Full exits 8
- NEXT CENTURY GROWTH INVESTORS LLC$6M
- Apis Capital Advisors, LLC$6M
- Tower View Wealth Management LLC$2M
- BANK OF AMERICA CORP /DE/$1M
- Ellsworth Advisors, LLC$1M
- CITIGROUP INC$1M
Largest adds
- Clal Insurance Enterprises Holdings Ltd$2M
- Qube Research & Technologies Ltd$2M
- Migdal Insurance & Financial Holdings Ltd.$2M
- MONIMUS CAPITAL MANAGEMENT, LP$2M
- MARSHALL WACE, LLP$1M
- Trexquant Investment LP$1M
Largest trims
- Boston Partners$10M
- WASATCH ADVISORS LP$9M
- Y.D. More Investments Ltd$8M
- MEITAV INVESTMENT HOUSE LTD$6M
- LORD, ABBETT & CO. LLC$5M
- Driehaus Capital Management LLC$5M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| MEITAV INVESTMENT HOUSE LTD added | 1,211,860 | $48M | 14.8% | 2026-Q1 |
| Y.D. More Investments Ltd trimmed | 810,001 | $32M | 9.9% | 2026-Q1 |
| WASATCH ADVISORS LP trimmed | 569,080 | $23M | 7.1% | 2026-Q1 |
| Migdal Insurance & Financial Holdings Ltd. added | 470,025 | $19M | 5.9% | 2026-Q1 |
| Clal Insurance Enterprises Holdings Ltd added | 456,640 | $18M | 5.7% | 2026-Q1 |
| Penn Capital Management Company, LLC trimmed | 290,600 | $12M | 3.6% | 2026-Q1 |
| Phoenix Financial Ltd. added | 251,246 | $10M | 3.1% | 2026-Q1 |
| Driehaus Capital Management LLC trimmed | 242,990 | $10M | 3.0% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 242,089 | $10M | 3.0% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 203,402 | $8M | 2.5% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 190,884 | $8M | 2.4% | 2026-Q1 |
| Stephens Investment Management Group LLC new | 190,332 | $8M | 2.4% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 125,266 | $5M | 1.6% | 2026-Q1 |
| LORD, ABBETT & CO. LLC trimmed | 106,865 | $4M | 1.3% | 2026-Q1 |
| Hennion & Walsh Asset Management, Inc. added | 92,769 | $4M | 1.2% | 2026-Q1 |
| Calamos Advisors LLC trimmed | 84,223 | $3M | 1.1% | 2026-Q1 |
| MARSHALL WACE, LLP added | 75,641 | $3M | 0.9% | 2026-Q1 |
| Informed Momentum Co LLC new | 74,265 | $3M | 0.9% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 67,107 | $3M | 0.8% | 2026-Q1 |
| Global IMC LLC added | 63,354 | $3M | 0.8% | 2026-Q1 |
| MONIMUS CAPITAL MANAGEMENT, LP added | 56,421 | $2M | 0.7% | 2026-Q1 |
| K.J. Harrison & Partners Inc trimmed | 46,800 | $2M | 0.6% | 2026-Q1 |
| Trexquant Investment LP added | 46,525 | $2M | 0.6% | 2026-Q1 |
| MORGAN STANLEY added | 42,920 | $2M | 0.5% | 2026-Q1 |
| ARK Investment Management LLC trimmed | 42,690 | $2M | 0.5% | 2026-Q1 |
| Huntleigh Advisors, Inc. added | 41,192 | $2M | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 40,870 | $2M | 0.5% | 2026-Q1 |
| SEI INVESTMENTS CO added | 39,366 | $2M | 0.5% | 2026-Q1 |
| Quadrature Capital Ltd added | 37,263 | $2M | 0.5% | 2026-Q1 |
| Cambridge Investment Research Advisors, Inc. added | 37,144 | $2M | 0.5% | 2026-Q1 |
| UBS Group AG added | 33,477 | $1M | 0.4% | 2026-Q1 |
| Knights of Columbus Asset Advisors LLC new | 33,278 | $1M | 0.4% | 2026-Q1 |
| FORMULA GROWTH LTD | 30,801 | $1M | 0.4% | 2026-Q1 |
| OAK RIDGE INVESTMENTS LLC added | 30,040 | $1M | 0.4% | 2026-Q1 |
| KORNITZER CAPITAL MANAGEMENT INC /KS trimmed | 29,553 | $1M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 28,147 | $1M | 0.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 27,027 | $1M | 0.3% | 2026-Q1 |
| CREDIT AGRICOLE S A added | 26,564 | $1M | 0.3% | 2026-Q1 |
| Walleye Capital LLC added | 25,946 | $1M | 0.3% | 2026-Q1 |
| Tidal Investments LLC added | 20,761 | $844K | 0.3% | 2026-Q1 |
| Illumine Investment Management, LLC new | 20,312 | $825K | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 20,175 | $820K | 0.3% | 2026-Q1 |
| Provident Co of the Employees of the Hebrew University LTD | 19,900 | $809K | 0.2% | 2026-Q1 |
| CenterBook Partners LP trimmed | 13,887 | $564K | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 13,157 | $500K | 0.2% | 2026-Q1 |
| FRED ALGER MANAGEMENT, LLC added | 12,249 | $498K | 0.2% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP trimmed | 12,185 | $495K | 0.2% | 2026-Q1 |
| NAVELLIER & ASSOCIATES INC trimmed | 11,634 | $473K | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 10,341 | $408K | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 10,038 | $408K | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC new | 9,912 | $403K | 0.1% | 2026-Q1 |
| MORGAN DEMPSEY CAPITAL MANAGEMENT LLC added | 9,393 | $382K | 0.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 8,173 | $332K | 0.1% | 2026-Q1 |
| Round Rock Advisors LLC new | 7,862 | $319K | 0.1% | 2026-Q1 |
| PDT Partners, LLC | 7,454 | $303K | 0.1% | 2026-Q1 |
| Boston Partners trimmed | 7,129 | $290K | 0.1% | 2026-Q1 |
| VIRTUS ADVISERS, LLC | 6,859 | $279K | 0.1% | 2026-Q1 |
| BARCLAYS PLC added | 6,647 | $270K | 0.1% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 5,811 | $236K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp new | 5,600 | $228K | 0.1% | 2026-Q1 |
| GTS SECURITIES LLC new | 5,429 | $221K | 0.1% | 2026-Q1 |
| Colonial River Investments, LLC added | 5,125 | $208K | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 5,118 | $208K | 0.1% | 2026-Q1 |
| Aquatic Capital Management LLC new | 2,902 | $118K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 2,084 | $85K | 0.0% | 2026-Q1 |
| Roubaix Capital, LLC added | 250,141 | $11M | 3.4% | 2025-Q3 stale |
| NEXT CENTURY GROWTH INVESTORS LLC new | 132,154 | $6M | 1.8% | 2025-Q4 stale |
| Apis Capital Advisors, LLC added | 126,496 | $6M | 1.7% | 2025-Q4 stale |
| Anthracite Investment Company, Inc. added | 144,892 | $4M | 1.4% | 2025-Q2 stale |
| ALTA FOX CAPITAL MANAGEMENT, LLC new | 122,790 | $4M | 1.2% | 2025-Q2 stale |
| MYDA Advisors LLC new | 100,000 | $3M | 0.9% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC added | 62,593 | $2M | 0.6% | 2025-Q2 stale |
| RAYMOND JAMES FINANCIAL INC new | 39,794 | $2M | 0.5% | 2025-Q3 stale |
| Tower View Wealth Management LLC new | 35,102 | $2M | 0.5% | 2025-Q4 stale |
| BANK OF AMERICA CORP /DE/ added | 31,028 | $1M | 0.4% | 2025-Q4 stale |
| Ellsworth Advisors, LLC trimmed | 26,489 | $1M | 0.4% | 2025-Q4 stale |
| CITIGROUP INC trimmed | 25,789 | $1M | 0.4% | 2025-Q4 stale |
| STIFEL FINANCIAL CORP new | 32,187 | $983K | 0.3% | 2025-Q2 stale |
| Monashee Investment Management LLC new | 31,937 | $975K | 0.3% | 2025-Q2 stale |
| Jump Financial, LLC new | 27,558 | $842K | 0.3% | 2025-Q2 stale |
| Valmark Advisers, Inc. new | 21,380 | $653K | 0.2% | 2025-Q2 stale |
| Legal Advantage Investments, Inc. trimmed | 12,000 | $536K | 0.2% | 2025-Q4 stale |
| Diametric Capital, LP added | 11,958 | $534K | 0.2% | 2025-Q4 stale |
| BOOTHBAY FUND MANAGEMENT, LLC new | 11,186 | $493K | 0.2% | 2025-Q3 stale |
| Y-Intercept (Hong Kong) Ltd added | 11,019 | $492K | 0.2% | 2025-Q4 stale |
| G2 Investment Partners Management LLC trimmed | 10,000 | $447K | 0.1% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP new | 13,560 | $414K | 0.1% | 2025-Q2 stale |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 8,779 | $387K | 0.1% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP new | 10,600 | $324K | 0.1% | 2025-Q2 stale |
| Centiva Capital, LP new | 6,788 | $299K | 0.1% | 2025-Q3 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 5,430 | $244K | 0.1% | 2025-Q4 stale |
| HRT FINANCIAL LP trimmed | 5,269 | $235K | 0.1% | 2025-Q4 stale |
| Janney Montgomery Scott LLC new | 5,300 | $233K | 0.1% | 2025-Q3 stale |
| AXXCESS WEALTH MANAGEMENT, LLC | 5,100 | $228K | 0.1% | 2025-Q4 stale |
| FIRST MANHATTAN CO. LLC. | 4,900 | $219K | 0.1% | 2025-Q4 stale |
| WINTON GROUP Ltd trimmed | 7,105 | $217K | 0.1% | 2025-Q2 stale |
| Corient Private Wealth LLC | 4,750 | $212K | 0.1% | 2025-Q4 stale |
| LPL Financial LLC trimmed | 4,667 | $208K | 0.1% | 2025-Q4 stale |
| GWN SECURITIES INC. new | 4,559 | $202K | 0.1% | 2025-Q3 stale |
| Quantbot Technologies LP trimmed | 1,130 | $50K | 0.0% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.