Atlas Venture Life Science Advisors, LLC
· Exited
Change
−6.4M
Δ Own
−100.0%
Date
Q1 2026
DA
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Atlas Venture Life Science Advisors, LLC
· Exited
Change
−6.4M
Δ Own
−100.0%
Date
Q1 2026
|
Atlas Venture Life Science Advisors, LLC | Exited· Q1 2026 | – | −6.4M | −100.0% | Q1 2026 | |||||
|
FMR LLC
· Reduced
Change
−5.7M
Δ Own
−99.6%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | – | −5.7M | −99.6% | Q1 2026 | |||||
|
Vestal Point Capital, LP
· Exited
Change
−5.2M
Δ Own
−100.0%
Date
Q1 2026
|
Vestal Point Capital, LP | Exited· Q1 2026 | – | −5.2M | −100.0% | Q1 2026 | |||||
|
Glazer Capital, LLC
· New
Change
+4.7M
Date
Q1 2026
|
Glazer Capital, LLC | New· Q1 2026 | – | +4.7M | – | Q1 2026 | |||||
|
Fil Ltd
· New
Change
+4.1M
Date
Q1 2026
|
Fil Ltd | New· Q1 2026 | – | +4.1M | – | Q1 2026 | |||||
|
Kryger Capital LLC
· New
Change
+3.9M
Date
Q1 2026
|
Kryger Capital LLC | New· Q1 2026 | – | +3.9M | – | Q1 2026 | |||||
|
JPMorgan Chase & Co
· Added
Change
+3.1M
Date
Q1 2026
|
JPMorgan Chase & Co | Added· Q1 2026 | – | +3.1M | – | Q1 2026 | |||||
|
Pictet Asset Management Holding SA
· Reduced
Change
−3.0M
Date
Q1 2026
|
Pictet Asset Management Holding SA | Reduced· Q1 2026 | – | −3.0M | – | Q1 2026 | |||||
|
AQR Arbitrage LLC
· New
Change
+2.5M
Date
Q1 2026
|
AQR Arbitrage LLC | New· Q1 2026 | – | +2.5M | – | Q1 2026 | |||||
|
UBS Group AG
· Added
Change
+2.1M
Date
Q1 2026
|
UBS Group AG | Added· Q1 2026 | – | +2.1M | – | Q1 2026 | |||||
|
Aigh Capital Management LLC
· Exited
Change
−2.0M
Δ Own
−100.0%
Date
Q1 2026
|
Aigh Capital Management LLC | Exited· Q1 2026 | – | −2.0M | −100.0% | Q1 2026 | |||||
|
O'Connor Alternative Investments LLC
· New
Change
+1.9M
Date
Q1 2026
|
O'Connor Alternative Investments LLC | New· Q1 2026 | – | +1.9M | – | Q1 2026 | |||||
|
BlackRock
· Reduced
Change
−1.8M
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | – | −1.8M | – | Q1 2026 | |||||
|
Perceptive Advisors LLC
· New
Change
+1.8M
Date
Q1 2026
|
Perceptive Advisors LLC | New· Q1 2026 | – | +1.8M | – | Q1 2026 | |||||
|
Oddo Bhf Asset Management Sas
· New
Change
+1.6M
Date
Q1 2026
|
Oddo Bhf Asset Management Sas | New· Q1 2026 | – | +1.6M | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Ai Day1 LLC
· 10% Owner
Other Form 4 events
-$278M
|
Ai Day1 LLC | 10% Owner | Other Form 4 events | $21.50 | -12.9M | -$278M | 0 | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Ai Day1 LLC
· 10% Owner
Shares transferred outside the market (D), often for tax or as a gift, not a market sale
-$18M
|
Ai Day1 LLC | 10% Owner | Shares transferred outside the market (D), often for tax or as a gift, not a market sale | $21.50 | -828K | -$18M | 0 | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Bender Jeremy
· Director
17 operations
-5.3M
|
Bender Jeremy | Director | 17 operations | – | -5.3M | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Vasconcelles Michael
· Officer
5 operations
-854K
|
Vasconcelles Michael | Officer | 5 operations | – | -854K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
York Charles N. II
· Officer
11 operations
-1.8M
|
York Charles N. II | Officer | 11 operations | – | -1.8M | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Dubow Adam
· Officer
11 operations
-903K
|
Dubow Adam | Officer | 11 operations | – | -903K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Holles Natalie C.
· Director
8 operations
-274K
|
Holles Natalie C. | Director | 8 operations | – | -274K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Ramasastry Saira
· Director
8 operations
-264K
|
Ramasastry Saira | Director | 8 operations | – | -264K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Josey John A.
· Director
8 operations
-273K
|
Josey John A. | Director | 8 operations | – | -273K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Garland J. Scott
· Director
6 operations
-184K
|
Garland J. Scott | Director | 6 operations | – | -184K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Dable Habib J.
· Director
4 operations
-136K
|
Dable Habib J. | Director | 4 operations | – | -136K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Grossman William
· Director
4 operations
-136K
|
Grossman William | Director | 4 operations | – | -136K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Nicholson Garry A.
· Director
5 operations
-141K
|
Nicholson Garry A. | Director | 5 operations | – | -141K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Merendino Lauren
· Officer
9 operations
-835K
|
Merendino Lauren | Officer | 9 operations | – | -835K | – | 0 | – | Apr 23, 2026 | Apr 23, 2026 | |||||||||
|
Merendino Lauren
· Officer
Sell
−$67K
|
Merendino Lauren | Officer | Sell | $11.60 | −6K | −$67K | 60K | – | Feb 17, 2026 | Feb 18, 2026 | |||||||||
N
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240 reporting institutions disclosed DAWN 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.