Essex Investment Management Co LLC
· Added
Change
+822K
Date
Q1 2026
RP
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Essex Investment Management Co LLC
· Added
Change
+822K
Date
Q1 2026
|
Essex Investment Management Co LLC | Added· Q1 2026 | – | +822K | – | Q1 2026 | |||||
|
Parkman Healthcare Partners LLC
· Exited
Change
−354K
Δ Own
−100.0%
Date
Q1 2026
|
Parkman Healthcare Partners LLC | Exited· Q1 2026 | – | −354K | −100.0% | Q1 2026 | |||||
|
Schonfeld Strategic Advisors LLC
· Exited
Change
−352K
Δ Own
−100.0%
Date
Q1 2026
|
Schonfeld Strategic Advisors LLC | Exited· Q1 2026 | – | −352K | −100.0% | Q1 2026 | |||||
|
Evernest Financial Advisors, LLC
· Added
Change
+308K
Date
Q1 2026
|
Evernest Financial Advisors, LLC | Added· Q1 2026 | – | +308K | – | Q1 2026 | |||||
|
Legato Capital Management LLC
· Added
Change
+260K
Date
Q1 2026
|
Legato Capital Management LLC | Added· Q1 2026 | – | +260K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
Change
+167K
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | – | +167K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Exited
Change
−127K
Δ Own
−100.0%
Date
Q1 2026
|
Citadel Advisors LLC | Exited· Q1 2026 | – | −127K | −100.0% | Q1 2026 | |||||
|
Vanguard
· Added
Change
+125K
Date
Q1 2026
|
Vanguard | Added· Q1 2026 | – | +125K | – | Q1 2026 | |||||
|
Informed Momentum Co LLC
· Exited
Change
−77K
Δ Own
−100.0%
Date
Q1 2026
|
Informed Momentum Co LLC | Exited· Q1 2026 | – | −77K | −100.0% | Q1 2026 | |||||
|
Xtx Topco Ltd
· New
Change
+61K
Date
Q1 2026
|
Xtx Topco Ltd | New· Q1 2026 | – | +61K | – | Q1 2026 | |||||
|
Fifth Lane Capital, LP
· Added
Change
+53K
Date
Q1 2026
|
Fifth Lane Capital, LP | Added· Q1 2026 | – | +53K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Reduced
Change
−48K
Date
Q1 2026
|
Marshall Wace, LLP | Reduced· Q1 2026 | – | −48K | – | Q1 2026 | |||||
|
Susquehanna International Group, LLP
· Added
Change
+40K
Date
Q1 2026
|
Susquehanna International Group, LLP | Added· Q1 2026 | – | +40K | – | Q1 2026 | |||||
|
Dimensional
· Added
Change
+31K
Date
Q1 2026
|
Dimensional | Added· Q1 2026 | – | +31K | – | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Exited
Change
−30K
Δ Own
−100.0%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Exited· Q1 2026 | – | −30K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Kollender Richard S.
· Director
4 operations
0
|
Kollender Richard S. | Director | 4 operations | $0.75 | 0 | – | 0 | – | Jul 24, 2026 | Jul 24, 2026 | |||||||||
|
Spignesi Robert G. Jr
· Director
2 operations
0
|
Spignesi Robert G. Jr | Director | 2 operations | $0.75 | 0 | – | 0 | – | Jul 22, 2026 | Jul 24, 2026 | |||||||||
|
Lowenstein Inese
· Director
3 operations
38K
|
Lowenstein Inese | Director | 3 operations | $1.95 | 38K | – | 13K | – | May 29, 2026 | Jun 2, 2026 | |||||||||
|
Pei Melinda Litherland
· Director
3 operations
38K
|
Pei Melinda Litherland | Director | 3 operations | $1.95 | 38K | – | 13K | – | May 29, 2026 | Jun 2, 2026 | |||||||||
|
Malloy Kirk
· Director
3 operations
38K
|
Malloy Kirk | Director | 3 operations | $1.95 | 38K | – | 13K | – | May 29, 2026 | Jun 2, 2026 | |||||||||
|
Wirtjes Sean M.
· CFO
3 operations
38K
|
Wirtjes Sean M. | CFO | 3 operations | $1.95 | 38K | – | 13K | – | May 29, 2026 | Jun 2, 2026 | |||||||||
|
Spignesi Robert G. Jr
· Director
3 operations
38K
|
Spignesi Robert G. Jr | Director | 3 operations | $1.95 | 38K | – | 13K | – | May 29, 2026 | Jun 2, 2026 | |||||||||
|
Malloy Kirk
· Director
2 operations
58K
|
Malloy Kirk | Director | 2 operations | – | 58K | – | 39K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Lowenstein Inese
· Director
2 operations
58K
|
Lowenstein Inese | Director | 2 operations | – | 58K | – | 39K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Pei Melinda Litherland
· Director
2 operations
58K
|
Pei Melinda Litherland | Director | 2 operations | – | 58K | – | 39K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Kollender Richard S.
· Director
2 operations
58K
|
Kollender Richard S. | Director | 2 operations | – | 58K | – | 39K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Bika Dafni
· Director
2 operations
58K
|
Bika Dafni | Director | 2 operations | – | 58K | – | 39K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Bain Capital Life Sciences Investors, LLC
· 10% Owner
3 operations
4.4M
|
Bain Capital Life Sciences Investors, LLC | 10% Owner | 3 operations | – | 4.4M | – | 1.5M | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Wilson John J. Addington
· Officer
Sell
−$41K
|
Wilson John J. Addington | Officer | Sell | $4.32 | −10K | −$41K | 317K | – | Mar 11, 2026 | Mar 12, 2026 | |||||||||
|
Wirtjes Sean M.
· Officer
Sell
−$32K
|
Wirtjes Sean M. | Officer | Sell | $4.32 | −7K | −$32K | 556K | – | Mar 11, 2026 | Mar 12, 2026 | |||||||||
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44 reporting institutions disclosed RPID position changes in the Q1 2026 snapshot.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.