13D·WATCH Activist + Insider Intelligence Live feed Blog About Pricing
ISSUER PROFILE · CIK 0001515673

Ultragenyx Pharmaceutical Inc.RARE

1 13D/G filings 1 distinct filers 0 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
1
1 SCHEDULE 13G
Distinct filers
1
single filer
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
3.13
as of 2026-09-30

13D/G Filings Timeline · 1 total

FiledFormFilerStakeSharesIntent
2026-10-20 SCHEDULE 13G Madison Avenue Partners, LP — — view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-09-30 20,349,877 3.13 +22.8%
2026-09-15 16,571,956 2.22 -3.3%
2026-08-31 17,144,354 8.00 +7.9%
2026-08-14 15,887,767 7.78 +6.2%
2026-07-31 14,963,396 8.28 +11.4%
2026-07-15 13,435,087 6.94 -17.2%
2026-06-30 16,217,153 3.60 +13.3%
2026-06-15 14,312,759 8.85 -2.7%
2026-05-29 14,703,432 9.83 +5.2%
2026-05-15 13,976,318 8.22 +2.3%
2026-04-30 13,665,812 8.40 +13.1%
2026-04-15 12,088,495 7.09 +5.9%

Alert me when any activist files on Ultragenyx Pharmaceutical Inc.

Free. We email you when criteria match. One-click unsubscribe in every email.

Track every activist who touches this name.

Free $0 (48h-delayed alerts) · Individual $49/mo (real-time) · Team & API $199/mo · Enterprise.

See pricing →