% of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for NVZMY in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | RHUMBLINE ADVISERS | 10,07310,073 | $601,996 | — | — |
| 2 | S&CO INC | 4,5004,500 | $265,000 | — | — |
| 3 | ALTA CAPITAL MANAGEMENT LLC/ | 3,8593,859 | $230,629 | — | NEW |
| 4 | GAMMA Investing LLC | 1,5131,513 | $90,423 | — | TRIM -33% |
| 5 | Sterling Capital Management LLC | 150150 | $8,847 | — | TRIM -97% |
| 6 | Salomon & Ludwin, LLC | 5959 | $3,526 | — | TRIM -75% |
| 7 | NBC SECURITIES, INC. | 4040 | $2,359 | — | NEW |
| 8 | PNC FINANCIAL SERVICES GROUP, INC. | 2121 | $1,255 | — | TRIM -99% |
| 9 | IMA Advisory Services, Inc. | 1313 | $782 | — | TRIM -13% |
| 10 | Hanson & Doremus Investment Management | 11 | $0 | — | NEW |
Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| RHUMBLINE ADVISERS | 10K | 10K | 11K | 10K | 10K | 10K | $601,996 |
| S&CO INC | 5K | 5K | 5K | 5K | 5K | 5K | $265,000 |
| ALTA CAPITAL MANAGEMENT LLC/ | — | — | — | — | — | 4K | $230,629 |
| GAMMA Investing LLC | 1K | 2K | 2K | 2K | 2K | 2K | $90,423 |
| Sterling Capital Management LLC | 6K | 7K | 7K | 6K | 5K | 150 | $8,847 |
| Salomon & Ludwin, LLC | — | — | 5 | 186 | 237 | 59 | $3,526 |
| NBC SECURITIES, INC. | — | — | — | — | — | 40 | $2,359 |
| PNC FINANCIAL SERVICES GROUP, INC. | 2K | 2K | 2K | 2K | 2K | 21 | $1,255 |
| IMA Advisory Services, Inc. | — | — | — | — | 15 | 13 | $782 |
| Hanson & Doremus Investment Management | — | — | — | — | — | 1 | $0 |
Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
Holder count only — too few computable %-of-shares-outstanding quarters for a % pane. Line breaks are quarters with no 13F record, never interpolated.
Short interest has its own tab now — open SI →
Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| ALTA CAPITAL MANAGEMENT LLC/ | +3,859 | $230,189 | OPEN |
| RHUMBLINE ADVISERS | +60 | $3,579 | — |
| NBC SECURITIES, INC. | +40 | $2,386 | OPEN |
| Hanson & Doremus Investment Management | +1 | $60 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| Sterling Capital Management LLC | −5,196 | $309,941 | TRIM |
| PNC FINANCIAL SERVICES GROUP, INC. | −1,532 | $91,384 | TRIM |
| GAMMA Investing LLC | −762 | $45,453 | TRIM |
| Salomon & Ludwin, LLC | −178 | $10,618 | TRIM |
| Ancora Advisors LLC | −157 | $9,365 | CLOSE |
The 2025-Q4 register is as-filed in ITS OWN share basis; every count below was rebased into the 2026-Q1 basis (no split in between, factor 1). Dollar figures value the SHARE delta at one price — the 2026-03-31 close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure.
13Fs disclose LONG US-listed positions only — shorts, most derivatives, bonds and non-US listings are invisible here, and a filer's quarter-over-quarter change is not necessarily a trade (index rebalances, in-kind transfers and entity successions all read as flow).
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 10 | 20,229 | — | $1M |
| 2025-Q4 | 11 | 24,191 | — | $2M |
| 2025-Q3 | 9 | 30,022 | — | $2M |
| 2025-Q2 | 11 | 29,683 | — | $2M |
| 2025-Q1 | 8 | 26,118 | — | $2M |
| 2024-Q4 | 8 | 24,920 | — | $1M |
| 2024-Q3 | 9 | 29,977 | — | $2M |
| 2024-Q2 | 6 | 26,287 | — | $1M |
| 2024-Q1 | 9 | 26,515 | — | $1M |
| 2023-Q4 | 10 | 77,968 | — | $4M |
| 2023-Q3 | 8 | 97,575 | — | $3M |
| 2023-Q2 | 7 | 124,021 | — | $4M |
| 2023-Q1 | 5 | 94,313 | — | $4M |
| 2022-Q4 | 7 | 88,980 | — | $4M |
| 2022-Q3 | 6 | 83,808 | — | $4M |
| 2022-Q2 | 8 | 84,334 | — | $5M |
| 2022-Q1 | 9 | 78,802 | — | $5M |
| 2021-Q4 | 8 | 78,908 | — | $7M |
| 2021-Q3 | 9 | 75,027 | — | $5M |
| 2021-Q2 | 14 | 82,726 | — | $6M |
| 2021-Q1 | 14 | 356,036 | — | $23M |
| 2020-Q4 | 16 | 348,402 | — | $20M |
| 2020-Q3 | 15 | 1,740,745 | — | $110M |
| 2020-Q2 | 15 | 356,764 | — | $21M |
| 2020-Q1 | 17 | 414,199 | — | $19M |
| 2019-Q4 | 16 | 385,175 | — | $19M |
| 2019-Q3 | 18 | 514,920 | — | $22M |
| 2019-Q2 | 17 | 539,116 | — | $25M |
| 2019-Q1 | 15 | 525,244 | — | $24M |
| 2018-Q4 | 15 | 517,067 | — | $23M |
| 2018-Q3 | 14 | 572,097 | — | $31M |
| 2018-Q2 | 13 | 525,289 | — | $27M |
| 2018-Q1 | 15 | 575,417 | — | $30M |
| 2017-Q4 | 15 | 507,469 | — | $29M |
| 2017-Q3 | 14 | 445,567 | — | $23M |
| 2017-Q2 | 15 | 510,908 | — | $22M |
| 2017-Q1 | 13 | 2,869,030 | — | $114M |
| 2016-Q4 | 13 | 2,697,910 | — | $93M |
| 2016-Q3 | 12 | 3,164,299 | — | $140M |
| 2016-Q2 | 12 | 336,736 | — | $16M |
| 2016-Q1 | 11 | 310,783 | — | $14M |
| 2015-Q4 | 11 | 235,691 | — | $11M |
| 2015-Q3 | 9 | 106,844 | — | $5M |
| 2015-Q2 | 11 | 218,216 | — | $10M |
| 2015-Q1 | 11 | 2,176,998 | — | $100M |
| 2014-Q4 | 9 | 132,833 | — | $6M |
| 2014-Q3 | 8 | 130,991 | — | $6M |
| 2014-Q2 | 10 | 1,579,788 | — | $79M |
| 2014-Q1 | 10 | 1,086,339 | — | $48M |
| 2013-Q4 | 8 | 1,141,177 | — | $48M |
| 2013-Q3 | 9 | 752,415 | — | $29M |
| 2013-Q2 | 10 | 865,313 | — | $28M |
| 2013-Q1 | 2 | 569,318 | — | $19M |
