Westfield Capital Management Co LP
· Exited
Change
−3.0M
Δ Own
−100.0%
Date
Q1 2026
BC
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Westfield Capital Management Co LP
· Exited
Change
−3.0M
Δ Own
−100.0%
Date
Q1 2026
|
Westfield Capital Management Co LP | Exited· Q1 2026 | – | −3.0M | −100.0% | Q1 2026 | |||||
|
Long Focus Capital Management, LLC
· Added
Change
+1.7M
Date
Q1 2026
|
Long Focus Capital Management, LLC | Added· Q1 2026 | – | +1.7M | – | Q1 2026 | |||||
|
Candriam S.c.a.
· Exited
Change
−1.2M
Δ Own
−100.0%
Date
Q1 2026
|
Candriam S.c.a. | Exited· Q1 2026 | – | −1.2M | −100.0% | Q1 2026 | |||||
|
BNP Paribas Asset Management Holding S.A.
· Exited
Change
−568K
Δ Own
−100.0%
Date
Q1 2026
|
BNP Paribas Asset Management Holding S.A. | Exited· Q1 2026 | – | −568K | −100.0% | Q1 2026 | |||||
|
Diadema Partners LP
· New
Change
+476K
Date
Q1 2026
|
Diadema Partners LP | New· Q1 2026 | – | +476K | – | Q1 2026 | |||||
|
Siren, L.L.C.
· Reduced
Change
−452K
Date
Q1 2026
|
Siren, L.L.C. | Reduced· Q1 2026 | – | −452K | – | Q1 2026 | |||||
|
Renaissance Technologies LLC
· Added
Change
+413K
Δ Own
+72.8%
Date
Q1 2026
|
Renaissance Technologies LLC | Added· Q1 2026 | – | +413K | +72.8% | Q1 2026 | |||||
|
Marshall Wace, LLP
· Added
Change
+339K
Date
Q1 2026
|
Marshall Wace, LLP | Added· Q1 2026 | – | +339K | – | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· New
Change
+309K
Date
Q1 2026
|
Qube Research & Technologies Ltd | New· Q1 2026 | – | +309K | – | Q1 2026 | |||||
|
Jefferies Financial Group Inc.
· Exited
Change
−297K
Δ Own
−100.0%
Date
Q1 2026
|
Jefferies Financial Group Inc. | Exited· Q1 2026 | – | −297K | −100.0% | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
Change
+297K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +297K | – | Q1 2026 | |||||
|
Armistice Capital, LLC
· Added
Change
+162K
Date
Q1 2026
|
Armistice Capital, LLC | Added· Q1 2026 | – | +162K | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
Change
+155K
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | – | +155K | – | Q1 2026 | |||||
|
Morgan Stanley
· Added
Change
+153K
Date
Q1 2026
|
Morgan Stanley | Added· Q1 2026 | – | +153K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−146K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −146K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Thompson Travis Alvin
· Officer
Grant (A)
60K
|
Thompson Travis Alvin | Officer | Grant (A) | – | 60K | – | 60K | – | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Hannay Michael Charles Ferguson
· Officer
Grant (A)
60K
|
Hannay Michael Charles Ferguson | Officer | Grant (A) | – | 60K | – | 60K | – | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Skynner Michael
· Officer
Grant (A)
60K
|
Skynner Michael | Officer | Grant (A) | – | 60K | – | 60K | – | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Perry Jennifer Scott
· Officer
Grant (A)
60K
|
Perry Jennifer Scott | Officer | Grant (A) | – | 60K | – | 60K | – | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Perry Jennifer Scott
· Officer
2 operations
−$2K
|
Perry Jennifer Scott | Officer | 2 operations | $4.31–$4.34 | −376 | −$2K | 91K | −0.4% | Jul 6, 2026 | Jul 7, 2026 | |||||||||
|
Skynner Michael
· Officer
Sell
−$2K
|
Skynner Michael | Officer | Sell | $4.31 | −532 | −$2K | 157K | −0.3% | Jul 6, 2026 | Jul 7, 2026 | |||||||||
|
Lee Kevin
· Director
Sell
−$7K
|
Lee Kevin | Director | Sell | $4.31 | −2K | −$7K | 604K | −0.3% | Jul 6, 2026 | Jul 7, 2026 | |||||||||
|
Hannay Michael Charles Ferguson
· Officer
Sell
−$1K
|
Hannay Michael Charles Ferguson | Officer | Sell | $4.31 | −255 | −$1K | 94K | −0.3% | Jul 6, 2026 | Jul 7, 2026 | |||||||||
|
Thompson Travis Alvin
· Officer
Sell
−$448
|
Thompson Travis Alvin | Officer | Sell | $4.31 | −104 | −$448 | 64K | −0.2% | Jul 6, 2026 | Jul 7, 2026 | |||||||||
|
Perry Jennifer Scott
· Officer
Sell
−$4K
|
Perry Jennifer Scott | Officer | Sell | $4.27 | −1K | −$4K | 91K | −1.1% | Jul 2, 2026 | Jul 7, 2026 | |||||||||
|
Skynner Michael
· Officer
Sell
−$8K
|
Skynner Michael | Officer | Sell | $4.27 | −2K | −$8K | 158K | −1.2% | Jul 2, 2026 | Jul 7, 2026 | |||||||||
|
Lee Kevin
· Director
Sell
−$25K
|
Lee Kevin | Director | Sell | $4.27 | −6K | −$25K | 605K | −1.0% | Jul 2, 2026 | Jul 7, 2026 | |||||||||
|
Hannay Michael Charles Ferguson
· Officer
Sell
−$6K
|
Hannay Michael Charles Ferguson | Officer | Sell | $4.27 | −2K | −$6K | 95K | −1.6% | Jul 2, 2026 | Jul 7, 2026 | |||||||||
|
Thompson Travis Alvin
· Officer
Sell
−$3K
|
Thompson Travis Alvin | Officer | Sell | $4.27 | −819 | −$3K | 65K | −1.3% | Jul 2, 2026 | Jul 7, 2026 | |||||||||
|
Hannay Michael Charles Ferguson
· Officer
Sell
−$1K
|
Hannay Michael Charles Ferguson | Officer | Sell | $5.05 | −251 | −$1K | 96K | – | Apr 6, 2026 | Apr 6, 2026 | |||||||||
N
A
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G
A
99 reporting institutions disclosed BCYC 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.