Viking Global Investors LP
· Exited
Change
−12.4M
Δ Own
−100.0%
Date
Q1 2026
RI
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Viking Global Investors LP
· Exited
Change
−12.4M
Δ Own
−100.0%
Date
Q1 2026
|
Viking Global Investors LP | Exited· Q1 2026 | – | −12.4M | −100.0% | Q1 2026 | |||||
|
Situational Awareness Partners LP
· New
Change
+11.5M
Date
Q1 2026
|
Situational Awareness Partners LP | New· Q1 2026 | – | +11.5M | – | Q1 2026 | |||||
|
Situational Awareness LP
· Added
Change
+5.3M
Date
Q1 2026
|
Situational Awareness LP | Added· Q1 2026 | – | +5.3M | – | Q1 2026 | |||||
|
Nomura Holdings Inc
· Added
Change
+4.8M
Date
Q1 2026
|
Nomura Holdings Inc | Added· Q1 2026 | – | +4.8M | – | Q1 2026 | |||||
|
Value Aligned Research Advisors, LLC
· Reduced
Change
−4.4M
Date
Q1 2026
|
Value Aligned Research Advisors, LLC | Reduced· Q1 2026 | – | −4.4M | – | Q1 2026 | |||||
|
Renaissance Technologies LLC
· Exited
Change
−4.3M
Δ Own
−100.0%
Date
Q1 2026
|
Renaissance Technologies LLC | Exited· Q1 2026 | – | −4.3M | −100.0% | Q1 2026 | |||||
|
Voloridge Investment Management, LLC
· Exited
Change
−3.7M
Δ Own
−100.0%
Date
Q1 2026
|
Voloridge Investment Management, LLC | Exited· Q1 2026 | – | −3.7M | −100.0% | Q1 2026 | |||||
|
Westfield Capital Management Co LP
· New
Change
+3.5M
Date
Q1 2026
|
Westfield Capital Management Co LP | New· Q1 2026 | – | +3.5M | – | Q1 2026 | |||||
|
Azora Capital LP
· Added
Change
+3.5M
Date
Q1 2026
|
Azora Capital LP | Added· Q1 2026 | – | +3.5M | – | Q1 2026 | |||||
|
Bank of America Corp
· Added
Change
+3.2M
Date
Q1 2026
|
Bank of America Corp | Added· Q1 2026 | – | +3.2M | – | Q1 2026 | |||||
|
Starboard Value LP
· Added
Change
+2.8M
Δ Own
+22.0%
Date
Q1 2026
|
Starboard Value LP | Added· Q1 2026 | – | +2.8M | +22.0% | Q1 2026 | |||||
|
Defiance Etfs, LLC
· New
Change
+2.7M
Date
Q1 2026
|
Defiance Etfs, LLC | New· Q1 2026 | – | +2.7M | – | Q1 2026 | |||||
|
Ameriprise Financial Inc
· Added
Change
+2.7M
Date
Q1 2026
|
Ameriprise Financial Inc | Added· Q1 2026 | – | +2.7M | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
Change
+2.4M
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | – | +2.4M | – | Q1 2026 | |||||
|
FMR LLC
· Added
Change
+2.2M
Δ Own
+17.3%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | – | +2.2M | +17.3% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Werner Ryan D.
· Officer
2 operations
−$384K
|
Werner Ryan D. | Officer | 2 operations | $21.22–$21.93 | −18K | −$384K | 896K | −2.0% | Jul 7, 2026 | Jul 9, 2026 | |||||||||
|
Leverton Jaime
· Director
Grant (A)
8K
|
Leverton Jaime | Director | Grant (A) | – | 8K | – | 36K | +29.7% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Mouton Douglas
· Director
Grant (A)
8K
|
Mouton Douglas | Director | Grant (A) | – | 8K | – | 45K | +22.9% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
D'Ambrosio Lance Varro
· Director
Grant (A)
8K
|
D'Ambrosio Lance Varro | Director | Grant (A) | – | 8K | – | 69K | +13.8% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Turner Michael John
· Director
Grant (A)
8K
|
Turner Michael John | Director | Grant (A) | – | 8K | – | 36K | +29.7% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Yee Colin M.
· Other
3 operations
0
|
Yee Colin M. | Other | 3 operations | – | 0 | – | 2.0M | – | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Werner Ryan D.
· Officer
Tax withholding or exercise payment (F)
-$332K
|
Werner Ryan D. | Officer | Tax withholding or exercise payment (F) | $23.96 | -14K | -$332K | 914K | −1.5% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Les Jason
· Director
Tax withholding or exercise payment (F)
-$2.4M
|
Les Jason | Director | Tax withholding or exercise payment (F) | $23.96 | -101K | -$2.4M | 7.8M | −1.3% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Howell Stephen Mitchell Jr
· Officer
Tax withholding or exercise payment (F)
-$526K
|
Howell Stephen Mitchell Jr | Officer | Tax withholding or exercise payment (F) | $23.96 | -22K | -$526K | 2.0M | −1.1% | Jul 1, 2026 | Jul 6, 2026 | |||||||||
|
Les Jason
· Director
Sell
−$1.9M
|
Les Jason | Director | Sell | $30.09 | −63K | −$1.9M | 1.3M | −4.7% | Jun 22, 2026 | Jun 24, 2026 | |||||||||
|
Werner Ryan D.
· Officer
Sell
−$761K
|
Werner Ryan D. | Officer | Sell | $30.00 | −25K | −$761K | 927K | −2.7% | Jun 22, 2026 | Jun 24, 2026 | |||||||||
|
Werner Ryan D.
· Officer
Sell
−$997K
|
Werner Ryan D. | Officer | Sell | $26.50 | −38K | −$997K | 953K | – | May 27, 2026 | May 29, 2026 | |||||||||
|
Les Jason
· Director
Sell
−$4.4M
|
Les Jason | Director | Sell | $25.19 | −175K | −$4.4M | 1.3M | – | May 11, 2026 | May 13, 2026 | |||||||||
|
Gibbs Jonathan
· Officer
Shares transferred outside the market (D), often for tax or as a gift, not a market sale
-1.1M
|
Gibbs Jonathan | Officer | Shares transferred outside the market (D), often for tax or as a gift, not a market sale | – | -1.1M | – | 85K | – | Apr 12, 2026 | Apr 14, 2026 | |||||||||
|
Yee Colin M.
· Officer
Grant (A)
158K
|
Yee Colin M. | Officer | Grant (A) | – | 158K | – | 2.1M | – | Jan 1, 2026 | Jan 5, 2026 | |||||||||
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391 reporting institutions disclosed RIOT 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.