My Size, Inc. (Nasdaq: MYSZ), an SEC filer in Services-Prepackaged Software, closed at $2.60, +0.0%, on 2026-08-28, with a market cap of $8M as of 2026-08-27, a return on equity of -97.0%, a net margin of -62.5% and 3-year sales growth of 28.0%. Institutional ownership, earnings history and filed financials are on the tabs below.
% 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.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | Williams & Novak, LLC | 27,03027,030 | $17,813 | — | ADD 19% |
| 2 | XTX Topco Ltd | 19,53019,530 | $11,279 | — | TRIM -3% |
| 3 | CITADEL ADVISORS LLC | 19,42319,423 | $11,217 | — | NEW |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 13,10213,102 | $7,566 | — | ADD 9% |
| 5 | UBS Group AG | 4,3624,362 | $2,521 | — | ADD 108% |
| 6 | MORGAN STANLEY | 509509 | $294 | — | — |
| 7 | SBI Securities Co., Ltd. | 2525 | $14 | — | — |
| 8 | Johnson Financial Group, Inc. | 11 | $1 | — | NEW |
Ranked by each filer’s own reported value, not shares.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| CITADEL ADVISORS LLC | +19,423 | $89,812 | OPEN |
| Williams & Novak, LLC | +4,295 | $19,860 | ADD |
| UBS Group AG | +2,260 | $10,450 | ADD |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | +1,087 | $5,026 | ADD |
| Johnson Financial Group, Inc. | +1 | $5 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| DRW Securities, LLC | −73,214 | $338,542 | CLOSE |
| XTX Topco Ltd | −689 | $3,186 | TRIM |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| Williams & Novak, LLC | — | — | — | — | 23K | 27K | $17,813 |
| XTX Topco Ltd | — | — | — | 10K | 20K | 20K | $11,279 |
| CITADEL ADVISORS LLC | — | — | 51K | — | — | 19K | $11,217 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | — | — | — | 12K | 13K | $7,566 |
| UBS Group AG | 17K | 18K | 17K | 39K | 2K | 4K | $2,521 |
| MORGAN STANLEY | 509 | 509 | 509 | 7K | 509 | 509 | $294 |
| SBI Securities Co., Ltd. | 15 | 175 | 205 | 75 | 25 | 25 | $14 |
| Johnson Financial Group, Inc. | — | — | — | — | — | 1 | $1 |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Holders only — breaks = no 13F.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
