★
Trade Filings
Managers Stocks Filings Superinvestors
Signals Institutional Buying Institutional Selling Insider Activity 13D & 13G Watch Sector Rotation
Tools Stock Screener Manager Screener Compare Managers Consensus Baskets All Research Tools Data API
Learn & AI Learn Ask the Data AI Agents
News ★ Saved
About About us Methodology Contact Disclaimer
Reader
DATA PLANS

Historical data downloads: coming with accounts.

API GATEWAY

Free read-only JSON access to the site's cached data.

Dark mode

Guided View
New to markets (prices, yields, YTD, market cap)? We explain every term as you browse, in plain English. Same data, with the help built in.

Expert View
You already know the market. Just the data: clean, fast and compact, with no extra explanations. This is the default view.

Interface language
Security record · archived quarter

CBIO

name pending profile ingest

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025
4Tracked holders
+2Δ holders
1.70MShares held
$27.45MReported value
+2New positions
−0Exits
n/a How these are computed → Explain this at the Research Desk →

All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025

Ownership over time
QuarterHoldersΔSharesReported valueNewExits
Q2 2026 40 +13 11.30M $203.37M +17 −4
Q1 2026 27 -2 9.11M $167.30M +2 −4
Q4 2025 29 0 6.56M $77.69M +2 −2
Q3 2025 15 +8 3.03M $36.06M +8 n/a
Q2 2025 4 +2 1.70M $27.45M +2 n/a
Holder count
Who holds it · Q2 2025
#ManagerSharesΔ sharesValueTheir weightHeld
1 Fidelity (FMR) ✦ 1.41M n/a $22.83M 0.0% n/c 1 SEC ↗ ×2
2 Wellington Management ✦ 179.89K New $2.90M 0.0% New 1 SEC ↗
3 Adage Capital Partners ✦ 100.91K New $1.63M 0.0% New 1 SEC ↗
4 BlackRock ✦ (passive) 6.05K n/a $97,663 0.0% n/c 1 SEC ↗ ×2

“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.

New buyers

Exited

No tracked exits this quarter.

Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 59 holders, 25.07M shares, $454.76M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.

Frequently co-owned

What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.

Insider transactions

Open-market purchases (P)

No open-market insider purchases in our coverage window.

Open-market sales (S)

Sep 18 Brumm Joshua T

Officer, Director · 7.84K sh · $130,956

Sep 18 McNeill Jonathan

Officer · 3.84K sh · $64,150

Sep 16 McNeill Jonathan

Officer · 731 sh · $13,085

Sep 16 Scalzo Richard William

Officer · 568 sh · $10,167

Sep 16 Im Ellie Eunkyung

Officer · 623 sh · $11,152

Sep 16 Pinkas Jan

Officer · 658 sh · $11,778

Sep 16 Bispham Barbara Harlin

Officer · 620 sh · $11,098

Sep 16 Lynch Ryan

Officer · 240 sh · $4,296

Sep 16 Brumm Joshua T

Officer, Director · 1.61K sh · $28,819

Awards, exercises and tax withholding are never counted as buys or sales here. Methodology

Beneficial ownership
Aug 14 SC 13G/A: BALYASNY ASSET MANAGEMENT L.P.

View original SEC filing ↗

Jul 20 SC 13D/A: Fairmount Funds Management LLC

16.5% of class · View original SEC filing ↗

Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR. Reporting period: Q2 2025 · Methodology · Get this via the API