Ticker · CUSIP 98937L105
Holders (tracked)
11
Combined shares
1,827,221
Combined value
$48.79M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+6 vs previous quarter over the last 6.
SEC event timeline
13 events
- +24,459 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−5,282 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−22,690 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+368,400 shares · 2025Q413F
- T. Rowe Price trimmed2026-02-17−5,050 shares · 2025Q413F
- Wellington Management trimmed2026-02-17−2,190 shares · 2025Q413F
- AQR Capital Management added2026-02-17+53,636 shares · 2025Q413F
- +71,850 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+765 shares · 2025Q313F
- T. Rowe Price trimmed2025-11-14−110,904 shares · 2025Q313F
- Wellington Management trimmed2025-11-14−21,394 shares · 2025Q313F
- AQR Capital Management trimmed2025-11-14−84 shares · 2025Q313F
- Norges Bank (Norway SWF) opened position2025-11-12+75,000 shares · 2024Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Steve Cohen (Point72)+368,400$9.2M
- Ken Griffin (Citadel Advisors)+24,459$888K
Added to1
- AQR Capital Management+53,636$1.9M
Trimmed4
- Izzy Englander (Millennium Mgmt)−22,690$824K
- Two Sigma Investments−5,282$192K
- Wellington Management−2,190$80K
- T. Rowe Price−5,050$183
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2024Q3 | 8 | $31.5M |
| 2024Q4 | 6 | $2.8M |
| 2025Q1 | 2 | $6.9M |
| 2025Q2 | 5 | $11.8M |
| 2025Q3 | 5 | $21.6M |
| 2025Q4 | 11 | $48.8M |
Who owns ZBIO
11 super-investors · 2025Q4
Tracked stake
1.83M
shares
Combined value
$49M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New6Added1Trim4
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 855.3K | $31M |
| 2 | Steve Cohen Point72 | 368.4K | $9M |
| 3 | AQR Capital Management | 78.2K | $3M |
| 4 | Izzy Englander Millennium Mgmt | 49.2K | $2M |
| 5 | Ken Griffin Citadel Advisors | 24.5K | $888K |
| 6 | Ken Griffin Citadel Advisors | 22.1K | $802K |
| 7 | Steve Cohen Point72 | 17.5K | $635K |
| 8 | Steve Cohen Point72 | 17.5K | $635K |
| 9 | Two Sigma Investments | 15.1K | $548K |
| 10 | Ken Griffin Citadel Advisors | 10.2K | $370K |
| 11 | T. Rowe Price | 369.2K | $13K |
Recent moves
20 transactions
- −5,282 · 2025Q4
- +24,459 · 2025Q4
- −22,690 · 2025Q4
- +368,400 · 2025Q4
- TRIMT. Rowe Price−5,050 · 2025Q4
- −2,190 · 2025Q4
- +53,636 · 2025Q4
- +765 · 2025Q3
- +71,850 · 2025Q3
- −84 · 2025Q3
- −21,394 · 2025Q3
- TRIMT. Rowe Price−110,904 · 2025Q3
- +75,000 · 2024Q3
- +24,668 · 2025Q2
- +19,617 · 2025Q2
- TRIMT. Rowe Price−32,404 · 2025Q2
- +5,295 · 2025Q2
- −134,896 · 2025Q1
- −17,045 · 2025Q1
- +6,386 · 2025Q1
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