Janus Henderson Group PLC
· Reduced
−$41M
Change
−6.1M
Date
Q1 2026
AR
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Janus Henderson Group PLC
· Reduced
−$41M
Change
−6.1M
Date
Q1 2026
|
Janus Henderson Group PLC | Reduced· Q1 2026 | −$41M | −6.1M | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
+$39M
Change
+5.9M
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | +$39M | +5.9M | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Reduced
−$24M
Change
−3.6M
Date
Q1 2026
|
Marshall Wace, LLP | Reduced· Q1 2026 | −$24M | −3.6M | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
+$14M
Change
+2.1M
Δ Own
+161.0%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | +$14M | +2.1M | +161.0% | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Added
+$13M
Change
+2.0M
Δ Own
+211.3%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Added· Q1 2026 | +$13M | +2.0M | +211.3% | Q1 2026 | |||||
|
Rubric Capital Management LP
· New
+$12M
Change
+1.9M
Date
Q1 2026
|
Rubric Capital Management LP | New· Q1 2026 | +$12M | +1.9M | – | Q1 2026 | |||||
|
State Street
· Added
+$11M
Change
+1.7M
Date
Q1 2026
|
State Street | Added· Q1 2026 | +$11M | +1.7M | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Exited
−$9.4M
Change
−1.4M
Δ Own
−100.0%
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Exited· Q1 2026 | −$9.4M | −1.4M | −100.0% | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
+$9.3M
Change
+1.4M
Δ Own
+48.7%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | +$9.3M | +1.4M | +48.7% | Q1 2026 | |||||
|
J. Goldman & Co LP
· Added
+$9.1M
Change
+1.4M
Date
Q1 2026
|
J. Goldman & Co LP | Added· Q1 2026 | +$9.1M | +1.4M | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
−$8.9M
Change
−1.3M
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | −$8.9M | −1.3M | −100.0% | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· Added
+$8.9M
Change
+1.3M
Date
Q1 2026
|
Qube Research & Technologies Ltd | Added· Q1 2026 | +$8.9M | +1.3M | – | Q1 2026 | |||||
|
Freestone Grove Partners LP
· Added
+$7.8M
Change
+1.2M
Date
Q1 2026
|
Freestone Grove Partners LP | Added· Q1 2026 | +$7.8M | +1.2M | – | Q1 2026 | |||||
|
Nomura Asset Management International Inc.
· Reduced
−$7.7M
Change
−1.2M
Date
Q1 2026
|
Nomura Asset Management International Inc. | Reduced· Q1 2026 | −$7.7M | −1.2M | – | Q1 2026 | |||||
|
Aigh Capital Management LLC
· Exited
−$7.6M
Change
−1.1M
Δ Own
−100.0%
Date
Q1 2026
|
Aigh Capital Management LLC | Exited· Q1 2026 | −$7.6M | −1.1M | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Raab Michael
· Director
Sell
−$211K
|
Raab Michael | Director | Sell | $5.06 | −42K | −$211K | 1.7M | −2.4% | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Raab Michael
· Director
2 operations
0
|
Raab Michael | Director | 2 operations | $0.99 | 0 | – | 291K | – | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Williams Laura A.
· Officer
Sell
−$490K
|
Williams Laura A. | Officer | Sell | $5.99 | −82K | −$490K | 378K | −17.8% | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
Williams Laura A.
· Officer
2 operations
0
|
Williams Laura A. | Officer | 2 operations | $0.99 | 0 | – | 31K | – | Jun 18, 2026 | Jun 22, 2026 | |||||||||
|
Parsey Merdad
· Director
2 operations
66K
|
Parsey Merdad | Director | 2 operations | – | 66K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Rodgers Richard J.
· Director
2 operations
66K
|
Rodgers Richard J. | Director | 2 operations | – | 66K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Mott David M.
· Director
3 operations
86K
|
Mott David M. | Director | 3 operations | – | 86K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Cadoret-Manier Onaiza
· Director
2 operations
66K
|
Cadoret-Manier Onaiza | Director | 2 operations | – | 66K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Bhanji Muna
· Director
2 operations
66K
|
Bhanji Muna | Director | 2 operations | – | 66K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Bertrand William C. Jr
· Director
3 operations
79K
|
Bertrand William C. Jr | Director | 3 operations | – | 79K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Bazemore Robert B.
· Director
2 operations
66K
|
Bazemore Robert B. | Director | 2 operations | – | 66K | – | 40K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Raab Michael
· Director
Sell
−$236K
|
Raab Michael | Director | Sell | $5.67 | −42K | −$236K | 1.7M | – | Jun 15, 2026 | Jun 17, 2026 | |||||||||
|
Raab Michael
· Director
2 operations
0
|
Raab Michael | Director | 2 operations | $0.99 | 0 | – | 312K | – | Jun 15, 2026 | Jun 17, 2026 | |||||||||
|
Reilly Joseph James
· Officer
2 operations
−$23K
|
Reilly Joseph James | Officer | 2 operations | $6.27 | −4K | −$23K | 150K | – | May 21, 2026 | May 22, 2026 | |||||||||
|
Hohenleitner Susan
· CFO
Sell
−$9K
|
Hohenleitner Susan | CFO | Sell | $6.27 | −1K | −$9K | 229K | – | May 21, 2026 | May 22, 2026 | |||||||||
N
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233 reporting institutions disclosed ARDX 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.