% 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 MPLIX 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 | PRAXIS INVESTMENT MANAGEMENT INC | 3,093,1073.1M | $50M | — | TRIM -3% |
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 |
|---|---|---|---|---|---|---|---|
| PRAXIS INVESTMENT MANAGEMENT INC | 3.6M | 3.4M | 3.2M | 3.2M | 3.2M | 3.1M | $50M |
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 | |
|---|---|---|---|
| No filer increased its position this quarter. | |||
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| PRAXIS INVESTMENT MANAGEMENT INC | −85,607 | $1M | TRIM |
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 | 1 | 3,093,107 | — | $50M |
| 2025-Q4 | 1 | 3,178,714 | — | $51M |
| 2025-Q3 | 1 | 3,180,628 | — | $51M |
| 2025-Q2 | 1 | 3,234,510 | — | $49M |
| 2025-Q1 | 1 | 3,361,135 | — | $45M |
| 2024-Q4 | 1 | 3,594,119 | — | $46M |
| 2024-Q3 | 1 | 3,398,543 | — | $48M |
| 2024-Q2 | 1 | 3,469,282 | — | $44M |
| 2024-Q1 | 1 | 3,478,048 | — | $45M |
| 2023-Q4 | 1 | 3,531,271 | — | $44M |
| 2023-Q3 | 1 | 3,393,931 | — | $39M |
| 2023-Q2 | 1 | 3,373,112 | — | $39M |
| 2023-Q1 | 1 | 3,365,234 | — | $40M |
| 2022-Q4 | 1 | 3,350,941 | — | $37M |
| 2022-Q3 | 1 | 3,540,965 | — | $35M |
| 2022-Q2 | 1 | 3,273,804 | — | $37M |
| 2022-Q1 | 1 | 3,296,444 | — | $42M |
| 2021-Q4 | 1 | 3,271,409 | — | $44M |
| 2021-Q3 | 1 | 3,061,070 | — | $41M |
| 2021-Q2 | 1 | 2,971,627 | — | $42M |
| 2021-Q1 | 1 | 3,028,451 | — | $40M |
| 2020-Q4 | 1 | 3,052,178 | — | $39M |
| 2020-Q3 | 1 | 3,191,946 | — | $36M |
| 2020-Q2 | 1 | 3,399,994 | — | $34M |
| 2020-Q1 | 1 | 3,404,923 | — | $30M |
