Invesco Ltd.
· Reduced
Change
−1.6M
Δ Own
−40.3%
Date
Q1 2026
BL
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Invesco Ltd.
· Reduced
Change
−1.6M
Δ Own
−40.3%
Date
Q1 2026
|
Invesco Ltd. | Reduced· Q1 2026 | – | −1.6M | −40.3% | Q1 2026 | |||||
|
T. Rowe Price Investment Management, Inc.
· Added
Change
+1.3M
Date
Q1 2026
|
T. Rowe Price Investment Management, Inc. | Added· Q1 2026 | – | +1.3M | – | Q1 2026 | |||||
|
Cramer Rosenthal McGlynn LLC
· New
Change
+633K
Date
Q1 2026
|
Cramer Rosenthal McGlynn LLC | New· Q1 2026 | – | +633K | – | Q1 2026 | |||||
|
Voya Investment Management LLC
· Exited
Change
−497K
Δ Own
−100.0%
Date
Q1 2026
|
Voya Investment Management LLC | Exited· Q1 2026 | – | −497K | −100.0% | Q1 2026 | |||||
|
Bank of America Corp
· Added
Change
+383K
Date
Q1 2026
|
Bank of America Corp | Added· Q1 2026 | – | +383K | – | Q1 2026 | |||||
|
Capricorn Fund Managers Ltd
· Exited
Change
−379K
Δ Own
−100.0%
Date
Q1 2026
|
Capricorn Fund Managers Ltd | Exited· Q1 2026 | – | −379K | −100.0% | Q1 2026 | |||||
|
Granahan Investment Management, LLC
· Added
Change
+240K
Date
Q1 2026
|
Granahan Investment Management, LLC | Added· Q1 2026 | – | +240K | – | Q1 2026 | |||||
|
Massachusetts Financial Services Co
· Added
Change
+193K
Date
Q1 2026
|
Massachusetts Financial Services Co | Added· Q1 2026 | – | +193K | – | Q1 2026 | |||||
|
BlackRock
· Added
Change
+190K
Date
Q1 2026
|
BlackRock | Added· Q1 2026 | – | +190K | – | Q1 2026 | |||||
|
Royce & Associates LP
· Added
Change
+167K
Date
Q1 2026
|
Royce & Associates LP | Added· Q1 2026 | – | +167K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
Change
+147K
Δ Own
+150.9%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | – | +147K | +150.9% | Q1 2026 | |||||
|
Deerfield Management Company, L.P.
· Exited
Change
−120K
Δ Own
−100.0%
Date
Q1 2026
|
Deerfield Management Company, L.P. | Exited· Q1 2026 | – | −120K | −100.0% | Q1 2026 | |||||
|
Russell Investments Group, Ltd.
· Added
Change
+102K
Date
Q1 2026
|
Russell Investments Group, Ltd. | Added· Q1 2026 | – | +102K | – | Q1 2026 | |||||
|
Next Century Growth Investors LLC
· Added
Change
+99K
Date
Q1 2026
|
Next Century Growth Investors LLC | Added· Q1 2026 | – | +99K | – | Q1 2026 | |||||
|
Morgan Stanley
· Reduced
Change
−91K
Date
Q1 2026
|
Morgan Stanley | Reduced· Q1 2026 | – | −91K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Werner Sean
· Officer
Tax withholding or exercise payment (F)
-$8K
|
Werner Sean | Officer | Tax withholding or exercise payment (F) | $29.15 | -275 | -$8K | 48K | −0.6% | Jul 17, 2026 | Jul 21, 2026 | |||||||||
|
Wichterman Troy
· Officer
Tax withholding or exercise payment (F)
-$23K
|
Wichterman Troy | Officer | Tax withholding or exercise payment (F) | $27.79 | -844 | -$23K | 213K | −0.4% | Jul 7, 2026 | Jul 13, 2026 | |||||||||
|
Mathew Aby J.
· Officer
Tax withholding or exercise payment (F)
-$14K
|
Mathew Aby J. | Officer | Tax withholding or exercise payment (F) | $27.79 | -516 | -$14K | 388K | −0.1% | Jul 7, 2026 | Jul 13, 2026 | |||||||||
|
Berard Todd
· Officer
Tax withholding or exercise payment (F)
-$8K
|
Berard Todd | Officer | Tax withholding or exercise payment (F) | $27.79 | -293 | -$8K | 163K | −0.2% | Jul 7, 2026 | Jul 13, 2026 | |||||||||
|
Berard Todd
· Officer
Tax withholding or exercise payment (F)
-$12K
|
Berard Todd | Officer | Tax withholding or exercise payment (F) | $26.04 | -470 | -$12K | 163K | −0.3% | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
Werner Sean
· Officer
Tax withholding or exercise payment (F)
-$11K
|
Werner Sean | Officer | Tax withholding or exercise payment (F) | $26.04 | -420 | -$11K | 48K | −0.9% | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
De Greef Roderick
· Director
Tax withholding or exercise payment (F)
-$72K
|
De Greef Roderick | Director | Tax withholding or exercise payment (F) | $26.04 | -3K | -$72K | 731K | −0.4% | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
Wichterman Troy
· Officer
Tax withholding or exercise payment (F)
-$24K
|
Wichterman Troy | Officer | Tax withholding or exercise payment (F) | $26.04 | -937 | -$24K | 214K | −0.4% | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
Mathew Aby J.
· Officer
Tax withholding or exercise payment (F)
-$15K
|
Mathew Aby J. | Officer | Tax withholding or exercise payment (F) | $26.04 | -564 | -$15K | 389K | −0.1% | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
Wichterman Troy
· CFO
Tax withholding or exercise payment (F)
-$27K
|
Wichterman Troy | CFO | Tax withholding or exercise payment (F) | $26.10 | -1K | -$27K | 215K | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Berard Todd
· Officer
Tax withholding or exercise payment (F)
-$9K
|
Berard Todd | Officer | Tax withholding or exercise payment (F) | $26.10 | -356 | -$9K | 163K | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Mathew Aby J.
· Officer
Tax withholding or exercise payment (F)
-$16K
|
Mathew Aby J. | Officer | Tax withholding or exercise payment (F) | $26.10 | -627 | -$16K | 390K | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Casdin Partners Master Fund, L.P.
· 10% Owner
Sell
−$15M
|
Casdin Partners Master Fund, L.P. | 10% Owner | Sell | $23.70 | −650K | −$15M | 4.8M | – | May 21, 2026 | May 21, 2026 | |||||||||
|
Casdin Partners Master Fund, L.P.
· 10% Owner
Sell
−$5.9M
|
Casdin Partners Master Fund, L.P. | 10% Owner | Sell | $23.70 | −250K | −$5.9M | 5.4M | – | May 20, 2026 | May 21, 2026 | |||||||||
|
Casdin Partners Master Fund, L.P.
· 10% Owner
Sell
−$6.8M
|
Casdin Partners Master Fund, L.P. | 10% Owner | Sell | $22.65 | −300K | −$6.8M | 5.7M | – | May 19, 2026 | May 21, 2026 | |||||||||
N
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A
179 reporting institutions disclosed BLFS 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.