SC Filed 2021-01-27 Event — SEC 0001193125-21-019026 →

Frazier Life Sciences IX, L.P. → Passage BIO, Inc. PASG

Stake: — Shares: —

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 11/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: +0.0%

Passive Schedule 13G filer baseline
Moderate short days-to-cover (3.5 DTC)

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

6 transactions

2 buys · 2 sales · 2 awards/exercises

Issuer Cluster

5 13D/G filings on this issuer

4 other filings besides this one

Filer Track Record

6 filings by this filer

5 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 3.47

68,917 shares short · -24.1% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-03-16	Borthwick Kathleen	officer	Award	15,610	$7.64	$119K
2026-03-16	Chou William	director, officer	Award	58,000	$7.64	$443K
2026-01-08	Chou William	director, officer	Option exercise	10,000	—	—
2026-01-08	Borthwick Kathleen	officer	Option exercise	5,000	—	—
2026-01-08	Chou William	director, officer	Sale	4,076	$18.44	$75K
2026-01-08	Borthwick Kathleen	officer	Sale	2,062	$18.44	$38K

Other 13D/G Filings on Passage BIO, Inc.

Filed	Form	Filer	Stake	Shares
2026-07-02	SCHEDULE 13D	Lynx1 Capital Management LP	21.00%	673,759	view →
2026-06-25	SCHEDULE 13G	Baselake Partners, LP	—	—	view →
2025-07-21	SCHEDULE	ORBIMED ADVISORS LLC	7.82%	243,878	view →
2024-04-12	SC	ORBIMED ADVISORS LLC	—	—	view →

Other Filings by Frazier Life Sciences IX, L.P.

Filed	Form	Issuer	Stake	Shares
2026-01-27	SCHEDULE	Mirum Pharmaceuticals, Inc. MIRM	6.80%	4,108,404	view →
2023-09-05	SC	Mirum Pharmaceuticals, Inc. MIRM	—	—	view →
2022-09-26	SC	Phathom Pharmaceuticals, Inc. PHAT	—	—	view →
2020-12-18	SC	Mirum Pharmaceuticals, Inc. MIRM	—	—	view →
2020-04-29	SC	Mirum Pharmaceuticals, Inc. MIRM	—	—	view →

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