ZBIO · Insider trading · 13F holders · Congress trades
Zenas Biopharma Inc (ZBIO)
Who is buying and selling ZBIO: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 15
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
ZBIO at a glance
- No open-market insider purchases or sales of ZBIO were filed in the last 90 days.
- 15 13F filers hold ZBIO among their 50 largest positions, worth $534.4M combined, including Oleg Nodelman. The biggest bets by portfolio weight are SR One Capital Management, LP (12.3%), NEA Management Company, LLC (6.4%) and NEXTBio Capital Management LP (5.0%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in ZBIO.
ZBIO insider trading
No open-market insider purchases or sales of ZBIO were filed in the last 90 days.
Who owns ZBIO? Hedge funds and superinvestors
15 13F filers hold ZBIO among their 50 largest positions, worth $534.4M combined, including Oleg Nodelman. The biggest bets by portfolio weight are SR One Capital Management, LP (12.3%), NEA Management Company, LLC (6.4%) and NEXTBio Capital Management LP (5.0%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Superinvestors holding ZBIO: Oleg Nodelman 1.0%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| SR One Capital Management, LPHedge fund | 12.3% | $127.9M | 5,037,854 | +0.0% shares | Q2 2026 |
| NEA Management Company, LLCHedge fund | 6.4% | $102.1M | 4,023,219 | +0.0% shares | Q2 2026 |
| Enavate Sciences Gp, LLCInvestment manager | 28.8% | $99.5M | 3,919,159 | +0.0% shares | Q2 2026 |
| Fairmount Funds Management LLCHedge fund | 4.0% | $59.9M | 2,359,025 | +0.0% shares | Q2 2026 |
| Nvp Associates, LLCInvestment manager | 14.2% | $46.7M | 1,838,482 | +0.0% shares | Q2 2026 |
| Oleg NodelmanHedge fund | 1.0% | $20.0M | 789,500 | +0.0% shares | Q2 2026 |
| ArrowMark Colorado Holdings LLCHedge fund | 0.6% | $14.6M | 573,318 | — | Q2 2026 |
| Silverarc Capital Management, LLCHedge fund | 1.4% | $12.9M | 509,789 | -55.1% shares | Q2 2026 |
| Rock Springs Capital Management LPHedge fund | 0.6% | $12.7M | 502,077 | +0.0% shares | Q2 2026 |
| Pivotal bioVenture Partners Investment Advisor LLCVenture capital | 4.0% | $12.5M | 490,766 | -17.1% shares | Q2 2026 |
| NEXTBio Capital Management LPHedge fund | 5.0% | $10.8M | 426,736 | +0.0% shares | Q2 2026 |
| Sphera Funds Management Ltd.Hedge fund | 0.8% | $5.9M | 230,834 | — | Q2 2026 |
| Sio Capital Management, LLCHedge fund | 0.9% | $5.3M | 208,557 | -37.1% shares | Q2 2026 |
| Birchview Capital, LPWealth manager | 1.1% | $2.4M | 93,601 | +33.7% shares | Q2 2026 |
| Exome Asset Management LLCHedge fund | 0.8% | $1.3M | 52,443 | -35.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 15). Screen ZBIO in the grand portfolio →
ZBIO stock trades by members of Congress
No member of Congress has disclosed a trade in ZBIO.
ZBIO questions and answers
Are insiders buying ZBIO stock?
No open-market insider purchases or sales of ZBIO were filed in the last 90 days.
Which hedge funds own ZBIO?
15 13F filers hold ZBIO among their 50 largest positions, worth $534.4M combined, including Oleg Nodelman. The biggest bets by portfolio weight are SR One Capital Management, LP (12.3%), NEA Management Company, LLC (6.4%) and NEXTBio Capital Management LP (5.0%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded ZBIO?
No member of Congress has disclosed a trade in ZBIO.
Who is the largest holder of ZBIO?
Among 13F filers, SR One Capital Management, LP reports the largest ZBIO position, $127.9M (5,037,854 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is SR One Capital Management, LP's: 12.3% of its portfolio.
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