% 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 PIIIW 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 | LMR Partners LLP | 2,546,9242.5M | $15,027 | — | — |
| 2 | Walleye Capital LLC | 1,993,8072.0M | $11,763 | — | — |
| 3 | TORONTO DOMINION BANK | 522,721522,721 | $3,136 | — | — |
| 4 | Athos Capital Ltd | 37,05237,052 | $2,000 | — | — |
| 5 | Warberg Asset Management LLC | 292,107292,107 | $1,723 | — | — |
| 6 | StoneX Group Inc. | 278,150278,150 | $1,391 | — | — |
| 7 | MOORE CAPITAL MANAGEMENT, LP | 133,333133,333 | $787 | — | — |
| 8 | PEAK6 LLC | 141,831141,831 | $709 | — | TRIM -50% |
| 9 | Greenland Capital Management LP | 141,412141,412 | $707 | — | — |
| 10 | TENOR CAPITAL MANAGEMENT Co., L.P. | 100,624100,624 | $594 | — | — |
| 11 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 82,71782,717 | $488 | — | TRIM -30% |
| 12 | SANDERS MORRIS HARRIS LLC | 93,33293,332 | $467 | — | NEW |
| 13 | SUSQUEHANNA ADVISORS GROUP, INC. | 50,00050,000 | $295 | — | — |
| 14 | TPG GP A, LLC | 16,66616,666 | $98 | — | NEW |
| 15 | Clear Street Group Inc. | 10,48210,482 | $62 | — | TRIM -4% |
| 16 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 8,3338,333 | $46 | — | — |
| 17 | BLAIR WILLIAM & CO/IL | 8,5988,598 | $43 | — | — |
| 18 | WOLVERINE ASSET MANAGEMENT LLC | 5,0945,094 | $30 | — | — |
| 19 | UBS Group AG | 1,9641,964 | $10 | — | TRIM -32% |
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 |
|---|---|---|---|---|---|---|---|
| LMR Partners LLP | 2.5M | 2.5M | 2.5M | 2.5M | 2.5M | 2.5M | $15,027 |
| Walleye Capital LLC | 2.2M | 2.0M | 2.0M | 2.0M | 2.0M | 2.0M | $11,763 |
| TORONTO DOMINION BANK | — | — | 523K | 523K | 523K | 523K | $3,136 |
| Athos Capital Ltd | 37K | 37K | 37K | — | 37K | 37K | $2,000 |
| Warberg Asset Management LLC | 288K | 292K | 292K | 292K | 292K | 292K | $1,723 |
| StoneX Group Inc. | 284K | 284K | 281K | 281K | 281K | 278K | $1,391 |
| MOORE CAPITAL MANAGEMENT, LP | 133K | 133K | 133K | 133K | 133K | 133K | $787 |
| PEAK6 LLC | 142K | 142K | 284K | 284K | 284K | 142K | $709 |
| Greenland Capital Management LP | 141K | 141K | 141K | 141K | 141K | 141K | $707 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 101K | 101K | 101K | 101K | 101K | 101K | $594 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | 12K | — | 52K | 118K | 83K | $488 |
| SANDERS MORRIS HARRIS LLC | 47K | 47K | — | 93K | — | 93K | $467 |
| SUSQUEHANNA ADVISORS GROUP, INC. | 50K | 50K | 50K | 50K | 50K | 50K | $295 |
| TPG GP A, LLC | — | — | — | — | — | 17K | $98 |
| Clear Street Group Inc. | — | — | — | 11K | 11K | 10K | $62 |
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.
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 19 | 6,465,147 |
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 | |
|---|---|---|---|
| SANDERS MORRIS HARRIS LLC | +93,332 | — | OPEN |
| TPG GP A, LLC | +16,666 | — | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| PEAK6 LLC | −141,831 | — | TRIM |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −35,730 | — | TRIM |
| HRT FINANCIAL LP | −16,317 | — | CLOSE |
| StoneX Group Inc. | −2,500 | — | — |
| UBS Group AG | −908 | — | 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 quarter-end close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure. No licensed quarter-end close is stored for this line, so the dollar columns are withheld; share counts stand.
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).
| — |
| $39,376 |
| 2025-Q4 | 18 | 6,553,035 | — | $67,966 |
| 2025-Q3 | 16 | 6,524,141 | — | $60,492 |
| 2025-Q2 | 15 | 6,415,566 | — | $71,480 |
| 2025-Q1 | 16 | 5,816,429 | — | $67,812 |
| 2024-Q4 | 16 | 6,028,874 | — | $78,763 |
| 2024-Q3 | 15 | 4,880,543 | — | $200,577 |
| 2024-Q2 | 19 | 7,473,759 | — | $619,778 |
| 2024-Q1 | 17 | 7,459,703 | — | $629,593 |
| 2023-Q4 | 17 | 7,295,601 | — | $806,471 |
| 2023-Q3 | 20 | 7,299,913 | — | $1M |
| 2023-Q2 | 22 | 6,604,014 | — | $2M |
| 2023-Q1 | 28 | 5,318,336 | — | $3M |
| 2022-Q4 | 29 | 5,680,338 | — | $5M |
| 2022-Q3 | 25 | 5,569,165 | — | $14M |
| 2022-Q2 | 25 | 5,920,872 | — | $11M |
| 2022-Q1 | 29 | 5,812,399 | — | $22M |
| 2021-Q4 | 40 | 4,684,916 | — | $8M |
