Ticker · CUSIP 98887Q104
Holders (tracked)
8
Combined shares
4,791,495
Combined value
$73.90M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
SEC event timeline
12 events
- D.E. Shaw & Co. added2026-02-17+204,319 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) added2026-02-17+700,803 shares · 2025Q413F
- Two Sigma Investments opened position2026-02-17+29,523 shares · 2025Q413F
- T. Rowe Price trimmed2026-02-17−345,717 shares · 2025Q413F
- Wellington Management trimmed2026-02-17−965,597 shares · 2025Q413F
- Ron Baron (Baron Capital / BAMCO) added2026-02-17+46,762 shares · 2025Q413F
- −216,571 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−252,400 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−245,371 shares · 2025Q313F
- T. Rowe Price added2025-11-14+795,634 shares · 2025Q313F
- Wellington Management added2025-11-14+341,492 shares · 2025Q313F
- Renaissance Technologies exited2025-11-13−232,900 shares · 2025Q313F
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 positions1
- Two Sigma Investments+29,523$521K
Added to3
- Ken Griffin (Citadel Advisors)+700,803$12.4M
- D.E. Shaw & Co.+204,319$3.6M
- Ron Baron (Baron Capital / BAMCO)+46,762$825K
Trimmed2
- Wellington Management−965,597$17.0M
- T. Rowe Price−345,717$6K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 14 | $28.53B |
| 2022Q2 | 14 | $22.46B |
| 2022Q3 | 11 | $37.2M |
| 2022Q4 | 12 | $326.6M |
| 2023Q1 | 12 | $324.2M |
| 2023Q2 | 11 | $200.3M |
| 2023Q3 | 11 | $116.9M |
| 2023Q4 | 9 | $115.8M |
| 2024Q1 | 10 | $193.3M |
| 2024Q2 | 13 | $222.6M |
| 2024Q3 | 13 | $340.5M |
| 2024Q4 | 10 | $75.2M |
| 2025Q1 | 11 | $236.9M |
| 2025Q2 | 9 | $145.1M |
| 2025Q3 | 7 | $141.2M |
| 2025Q4 | 8 | $73.9M |
Who owns ZLAB
8 super-investors · 2025Q4
Tracked stake
4.79M
shares
Combined value
$74M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added5Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 1.69M | $30M |
| 2 | Ron Baron Baron Capital / BAMCO | 1.42M | $25M |
| 3 | Wellington Management | 752.9K | $13M |
| 4 | D.E. Shaw & Co. | 238.6K | $4M |
| 5 | Ken Griffin Citadel Advisors | 46.4K | $818K |
| 6 | Two Sigma Investments | 29.5K | $521K |
| 7 | Ken Griffin Citadel Advisors | 15.3K | $270K |
| 8 | T. Rowe Price | 603.0K | $11K |
Recent moves
20 transactions
- +700,803 · 2025Q4
- +204,319 · 2025Q4
- −965,597 · 2025Q4
- TRIMT. Rowe Price−345,717 · 2025Q4
- +46,762 · 2025Q4
- +29,523 · 2025Q4
- +341,492 · 2025Q3
- +795,634 · 2025Q3
- −252,400 · 2025Q3
- −216,571 · 2025Q3
- TRIMD.E. Shaw & Co.−245,371 · 2025Q3
- −232,900 · 2025Q3
- −55,843 · 2025Q2
- −2,270,262 · 2025Q2
- +164,230 · 2025Q2
- TRIMD.E. Shaw & Co.−28,294 · 2025Q2
- −97,077 · 2025Q2
- TRIMT. Rowe Price−2,115,179 · 2025Q2
- −241,680 · 2025Q2
- +148,400 · 2025Q2
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