FMR LLC
· Added
+$99M
Change
+2.9M
Δ Own
+18550.3%
Date
Q1 2026
MB
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
FMR LLC
· Added
+$99M
Change
+2.9M
Δ Own
+18550.3%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | +$99M | +2.9M | +18550.3% | Q1 2026 | |||||
|
Polar Capital Holdings PLC
· New
+$55M
Change
+1.6M
Date
Q1 2026
|
Polar Capital Holdings PLC | New· Q1 2026 | +$55M | +1.6M | – | Q1 2026 | |||||
|
Ecor1 Capital, LLC
· Reduced
−$46M
Change
−1.3M
Date
Q1 2026
|
Ecor1 Capital, LLC | Reduced· Q1 2026 | −$46M | −1.3M | – | Q1 2026 | |||||
|
Aaron Wealth Advisors LLC
· Added
+$37M
Change
+1.1M
Date
Q1 2026
|
Aaron Wealth Advisors LLC | Added· Q1 2026 | +$37M | +1.1M | – | Q1 2026 | |||||
|
Caligan Partners LP
· New
+$29M
Change
+849K
Date
Q1 2026
|
Caligan Partners LP | New· Q1 2026 | +$29M | +849K | – | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Exited
−$23M
Change
−681K
Δ Own
−100.0%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Exited· Q1 2026 | −$23M | −681K | −100.0% | Q1 2026 | |||||
|
Deep Track Capital, LP
· Reduced
−$17M
Change
−492K
Date
Q1 2026
|
Deep Track Capital, LP | Reduced· Q1 2026 | −$17M | −492K | – | Q1 2026 | |||||
|
Braidwell LP
· Added
+$16M
Change
+474K
Date
Q1 2026
|
Braidwell LP | Added· Q1 2026 | +$16M | +474K | – | Q1 2026 | |||||
|
Stempoint Capital LP
· Added
+$14M
Change
+421K
Date
Q1 2026
|
Stempoint Capital LP | Added· Q1 2026 | +$14M | +421K | – | Q1 2026 | |||||
|
Driehaus Capital Management LLC
· Reduced
−$13M
Change
−390K
Date
Q1 2026
|
Driehaus Capital Management LLC | Reduced· Q1 2026 | −$13M | −390K | – | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Reduced
−$13M
Change
−383K
Δ Own
−57.0%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | −$13M | −383K | −57.0% | Q1 2026 | |||||
|
Trails Edge Capital Partners, LP
· Exited
−$11M
Change
−315K
Δ Own
−100.0%
Date
Q1 2026
|
Trails Edge Capital Partners, LP | Exited· Q1 2026 | −$11M | −315K | −100.0% | Q1 2026 | |||||
|
Orbimed Advisors LLC
· Reduced
−$10M
Change
−297K
Date
Q1 2026
|
Orbimed Advisors LLC | Reduced· Q1 2026 | −$10M | −297K | – | Q1 2026 | |||||
|
Candriam S.c.a.
· New
+$10M
Change
+294K
Date
Q1 2026
|
Candriam S.c.a. | New· Q1 2026 | +$10M | +294K | – | Q1 2026 | |||||
|
Soleus Capital Management, L.P.
· Reduced
−$7.8M
Change
−230K
Date
Q1 2026
|
Soleus Capital Management, L.P. | Reduced· Q1 2026 | −$7.8M | −230K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mathers Edward T.
· Director
Grant (A)
12K
|
Mathers Edward T. | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Pescovitz Ora H.
· Director
Grant (A)
12K
|
Pescovitz Ora H. | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Heron Patrick J.
· Director
Grant (A)
12K
|
Heron Patrick J. | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Stelzer Laurie
· Director
Grant (A)
12K
|
Stelzer Laurie | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Hoerter Steven L.
· Director
Grant (A)
12K
|
Hoerter Steven L. | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Ryder Steven
· Director
Grant (A)
12K
|
Ryder Steven | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Aynechi Tiba
· Director
Grant (A)
12K
|
Aynechi Tiba | Director | Grant (A) | – | 12K | – | 12K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Azoulay Salomon
· Officer
2 operations
−$2.7M
|
Azoulay Salomon | Officer | 2 operations | $38.30–$38.38 | −70K | −$2.7M | 15K | – | May 8, 2026 | May 11, 2026 | |||||||||
|
Azoulay Salomon
· Officer
4 operations
140K
|
Azoulay Salomon | Officer | 4 operations | $10.46–$16.00 | 140K | – | 30K | – | May 8, 2026 | May 11, 2026 | |||||||||
|
Azoulay Salomon
· Officer
Sell
−$7K
|
Azoulay Salomon | Officer | Sell | $29.54 | −231 | −$7K | 15K | – | May 6, 2026 | May 8, 2026 | |||||||||
|
Hawryluk P. Kent
· Director
Sell
−$18K
|
Hawryluk P. Kent | Director | Sell | $29.54 | −607 | −$18K | 728K | – | May 6, 2026 | May 8, 2026 | |||||||||
|
Hoerter Steven L.
· Director
2 operations
86K
|
Hoerter Steven L. | Director | 2 operations | – | 86K | – | 74K | – | May 1, 2026 | May 4, 2026 | |||||||||
|
Hawryluk P. Kent
· Director, Officer
Buy
+$526K
|
Hawryluk P. Kent | Director, Officer | Buy | $28.41 | +18K | +$526K | 487K | – | Mar 13, 2026 | Mar 16, 2026 | |||||||||
|
Hawryluk P. Kent
· Director, Officer
2 operations
0
|
Hawryluk P. Kent | Director, Officer | 2 operations | $16.00 | 0 | – | 92K | – | Feb 26, 2026 | Feb 27, 2026 | |||||||||
|
Azoulay Salomon
· Officer
2 operations
85K
|
Azoulay Salomon | Officer | 2 operations | – | 85K | – | 70K | – | Feb 2, 2026 | Feb 3, 2026 | |||||||||
N
A
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A
A
141 reporting institutions disclosed MBX 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.