Who owns LMAT (LMAT)
Which tracked institutional funds hold LMAT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See LMAT 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
The tracked-fund tape on LMAT is one-sided between 2025-Q4 and 2026-Q1: 138 added or opened and 32 trimmed or exited — on balance accumulating.
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
LMAT’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes LMAT more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in LMAT 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 340 tracked filers holding LMAT, 189 increased or opened the position and 135 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 LMAT 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 20
- VANGUARD CAPITAL MANAGEMENT LLC$100M
- VANGUARD PORTFOLIO MANAGEMENT LLC$61M
- Driehaus Capital Management LLC$22M
- VANGUARD FIDUCIARY TRUST CO$16M
- RIVERBRIDGE PARTNERS LLC$12M
- Select Equity Group, L.P.$11M
Full exits 10
- VANGUARD GROUP INC$118M
- COMERICA BANK$11M
- ExodusPoint Capital Management, LP$5M
- AWM Investment Company, Inc.$5M
- F/m Investments LLC$3M
- TWO SIGMA ADVISERS, LP$3M
Largest adds
- Conestoga Capital Advisors, LLC$46M
- FIRST TRUST ADVISORS LP$33M
- CONGRESS ASSET MANAGEMENT CO$32M
- STATE STREET CORP$28M
- Copeland Capital Management, LLC$23M
- GEODE CAPITAL MANAGEMENT, LLC$21M
Largest trims
- M&T Bank Corp$127M
- Pacer Advisors, Inc.$75M
- BlackRock, Inc.$7M
- Thrivent Financial for Lutherans$6M
- MILLENNIUM MANAGEMENT LLC$5M
- Ranger Investment Management, L.P.$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 |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 2,264,924 | $247M | 10.6% | 2026-Q1 |
| Conestoga Capital Advisors, LLC added | 1,476,813 | $161M | 6.9% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 998,071 | $109M | 4.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 912,058 | $100M | 4.3% | 2026-Q1 |
| Copeland Capital Management, LLC trimmed | 870,692 | $95M | 4.1% | 2026-Q1 |
| STATE STREET CORP added | 855,784 | $93M | 4.0% | 2026-Q1 |
| CONGRESS ASSET MANAGEMENT CO added | 834,529 | $91M | 3.9% | 2026-Q1 |
| GENEVA CAPITAL MANAGEMENT LLC trimmed | 753,992 | $82M | 3.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 658,445 | $72M | 3.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 562,770 | $61M | 2.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 476,335 | $52M | 2.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 432,416 | $47M | 2.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 407,771 | $45M | 1.9% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 312,555 | $34M | 1.5% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 294,994 | $32M | 1.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 281,978 | $31M | 1.3% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 274,396 | $30M | 1.3% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 272,654 | $30M | 1.3% | 2026-Q1 |
| Invesco Ltd. added | 271,233 | $30M | 1.3% | 2026-Q1 |
| Annex Advisory Services, LLC added | 250,610 | $27M | 1.2% | 2026-Q1 |
| Ranger Investment Management, L.P. trimmed | 238,360 | $26M | 1.1% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 236,777 | $26M | 1.1% | 2026-Q1 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC trimmed | 230,718 | $25M | 1.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 197,975 | $22M | 0.9% | 2026-Q1 |
| Driehaus Capital Management LLC added | 197,225 | $22M | 0.9% | 2026-Q1 |
| RICE HALL JAMES & ASSOCIATES, LLC added | 184,725 | $20M | 0.9% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 180,095 | $20M | 0.8% | 2026-Q1 |
| BESSEMER GROUP INC added | 171,838 | $19M | 0.8% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 167,328 | $18M | 0.8% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 165,726 | $18M | 0.8% | 2026-Q1 |
| DF DENT & CO INC trimmed | 165,341 | $18M | 0.8% | 2026-Q1 |
| FIFTH THIRD BANCORP added | 161,084 | $18M | 0.8% | 2026-Q1 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 148,601 | $16M | 0.7% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 148,416 | $16M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 144,672 | $16M | 0.7% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 140,893 | $15M | 0.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 138,502 | $15M | 0.6% | 2026-Q1 |
| SEI INVESTMENTS CO added | 136,674 | $15M | 0.6% | 2026-Q1 |
| MARSHALL WACE, LLP added | 131,220 | $14M | 0.6% | 2026-Q1 |
| Rockefeller Capital Management L.P. trimmed | 127,106 | $14M | 0.6% | 2026-Q1 |
| BAHL & GAYNOR INC trimmed | 124,528 | $14M | 0.6% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 117,840 | $13M | 0.6% | 2026-Q1 |
| CRAWFORD INVESTMENT COUNSEL INC added | 111,876 | $12M | 0.5% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 108,185 | $12M | 0.5% | 2026-Q1 |
| Summit Creek Advisors LLC trimmed | 105,679 | $12M | 0.5% | 2026-Q1 |
| RIVERBRIDGE PARTNERS LLC new | 105,599 | $12M | 0.5% | 2026-Q1 |
| Select Equity Group, L.P. new | 100,470 | $11M | 0.5% | 2026-Q1 |
| Grandeur Peak Global Advisors, LLC trimmed | 98,723 | $11M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 97,083 | $11M | 0.5% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 93,431 | $10M | 0.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 80,343 | $9M | 0.4% | 2026-Q1 |
| Vest Financial, LLC added | 75,483 | $8M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 74,625 | $8M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 73,294 | $8M | 0.3% | 2026-Q1 |
| Bridge City Capital, LLC added | 70,390 | $8M | 0.3% | 2026-Q1 |
| Aptus Capital Advisors, LLC added | 68,495 | $7M | 0.3% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 66,742 | $7M | 0.3% | 2026-Q1 |
| Trexquant Investment LP added | 66,062 | $7M | 0.3% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 61,427 | $7M | 0.3% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 60,978 | $7M | 0.3% | 2026-Q1 |
| DIVIDEND ASSETS CAPITAL, LLC trimmed | 59,093 | $6M | 0.3% | 2026-Q1 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC trimmed | 58,335 | $6M | 0.3% | 2026-Q1 |
| AXIOM INVESTORS LLC /DE new | 55,490 | $6M | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC added | 54,162 | $6M | 0.3% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 54,006 | $6M | 0.3% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 52,712 | $6M | 0.2% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 52,252 | $6M | 0.2% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC added | 50,307 | $5M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 47,237 | $5M | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 46,339 | $5M | 0.2% | 2026-Q1 |
| Linden Thomas Advisory Services, LLC added | 45,946 | $5M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 45,578 | $5M | 0.2% | 2026-Q1 |
| CHATHAM CAPITAL GROUP, INC. trimmed | 43,835 | $5M | 0.2% | 2026-Q1 |
| Swiss National Bank | 42,500 | $5M | 0.2% | 2026-Q1 |
| UBS Group AG added | 41,417 | $5M | 0.2% | 2026-Q1 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 40,000 | $4M | 0.2% | 2026-Q1 |
| Emerald Investment Advisers, LLC new | 34,968 | $4M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 34,895 | $4M | 0.2% | 2026-Q1 |
| HRT FINANCIAL LP added | 33,272 | $4M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 33,147 | $4M | 0.2% | 2026-Q1 |
| Cetera Investment Advisers added | 31,429 | $3M | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 30,520 | $3M | 0.1% | 2026-Q1 |
| Quantbot Technologies LP added | 30,066 | $3M | 0.1% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 29,466 | $3M | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 28,835 | $3M | 0.1% | 2026-Q1 |
| Man Group plc added | 28,387 | $3M | 0.1% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 28,225 | $3M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 27,934 | $3M | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC trimmed | 27,204 | $3M | 0.1% | 2026-Q1 |
| PERKINS CAPITAL MANAGEMENT INC trimmed | 25,825 | $3M | 0.1% | 2026-Q1 |
| NATIONS FINANCIAL GROUP INC, /IA/ /ADV added | 25,811 | $3M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 1,451,326 | $118M | 5.0% | 2025-Q4 stale |
| COMERICA BANK trimmed | 133,243 | $11M | 0.5% | 2025-Q4 stale |
| NORGES BANK added | 98,278 | $9M | 0.4% | 2025-Q3 stale |
| CW Advisors, LLC trimmed | 94,779 | $8M | 0.3% | 2025-Q2 stale |
| Nicholas Investment Partners, LP added | 62,841 | $5M | 0.2% | 2025-Q1 stale |
| ExodusPoint Capital Management, LP added | 62,290 | $5M | 0.2% | 2025-Q4 stale |
| AWM Investment Company, Inc. | 62,000 | $5M | 0.2% | 2025-Q4 stale |
| F/m Investments LLC trimmed | 35,534 | $3M | 0.1% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 33,797 | $3M | 0.1% | 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.