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Security record · archived quarter

MASS

name pending profile ingest

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024
9Tracked holders
Δ holders
5.68MShares held
$29.25MReported value
+0New positions
−0Exits
How these are computed → Explain this at the Research Desk →

All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2024

Ownership over time
QuarterHoldersΔSharesReported valueNewExits
Q2 2026 52 -2 10.35M $89.93M +2 −5
Q1 2026 57 -4 10.59M $64.79M −4
Q4 2025 61 +1 11.56M $60.65M +2 −1
Q3 2025 16 0 9.68M $84.83M
Q2 2025 13 +1 10.10M $71.99M +1
Q1 2025 9 0 4.75M $21.27M +2 −2
Q4 2024 9 0 4.58M $10.07M +2 −2
Q3 2024 8 -1 4.69M $16.27M −1
Q2 2024 9 5.68M $29.25M
Holder count
Who holds it · Q2 2024
#ManagerSharesΔ sharesValueTheir weightHeld
1 ARK Investment Management 3.94M $20.28M 0.2% n/c 1 SEC ↗
2 Millennium Management 618.31K $3.18M 0.0% n/c 1 SEC ↗
3 Geode Capital Management (passive) 561.15K $2.89M 0.0% n/c 1 SEC ↗
4 Geode Capital Management (passive) 561.15K $2.89M 0.0% n/c 1 SEC ↗
5 Renaissance Technologies 195.50K $1.01M 0.0% n/c 1 SEC ↗
6 Citadel Advisors 169.28K $871,771 0.0% n/c 1 SEC ↗
7 Citadel Advisors 169.28K $871,771 0.0% n/c 1 SEC ↗
8 AQR Capital Management 113.59K $585,009 0.0% n/c 1 SEC ↗
9 AQR Capital Management 113.59K $585,009 0.0% n/c 1 SEC ↗
10 Marshall Wace 44.40K $228,640 0.0% n/c 1 SEC ↗
11 PRIMECAP Management 24.83K $127,874 0.0% n/c 1 SEC ↗
12 D. E. Shaw & Co. 15.72K $80,979 0.0% n/c 1 SEC ↗

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

New buyers

No new tracked buyers this quarter.

Exited

No tracked exits this quarter.

Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 111 holders, 27.94M shares, $169.30M 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)

Aug 21 AWM Investment Company, Inc.

10% owner · 41.58K sh · $441,159

Aug 20 AWM Investment Company, Inc.

10% owner · 8.42K sh · $88,638

Aug 17 Knopp Kevin J.

Officer, Director · 20.00K sh · $207,000

Aug 13 Knopp Kevin J.

Officer, Director · 7.62K sh · $76,677

Aug 12 Knopp Kevin J.

Officer, Director · 2.75K sh · $27,662

Aug 11 Brown Christopher D.

Director · 8.36K sh · $77,144

Aug 11 Knopp Kevin J.

Officer, Director · 115.75K sh · $1.14M

Aug 11 Knopp Kevin J.

Officer, Director · 30.17K sh · $306,527

Aug 10 Brown Christopher D.

Director · 9.44K sh · $85,261

Aug 10 Knopp Kevin J.

Officer, Director · 348 sh · $3,153

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

Beneficial ownership
Aug 14 SC 13G/A — AWM Investment Company, Inc.

View original SEC filing ↗

Aug 14 SC 13G/A — ARK Investment Management LLC

View original SEC filing ↗

Aug 14 SC 13G/A — ARCH Venture Fund VII, L.P.

View original SEC filing ↗

Jul 27 SC 13G — BlackRock, Inc.

View original SEC filing ↗

Jun 05 SC 13G/A — ARK Investment Management LLC

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 2024 · Methodology · Get this via the API