SC Filed 2019-12-17 Event — SEC 0001193125-19-315418 →

SPRINGER TIMOTHY A → SELECTA BIOSCIENCES INC RNAC

Stake: — Shares: —

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 16/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: -14.5%

Passive Schedule 13G filer baseline
Elevated short days-to-cover (11.7 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)

2 transactions

0 buys · 0 sales · 2 awards/exercises

Issuer Cluster

16 13D/G filings on this issuer

15 other filings besides this one

Filer Track Record

10 filings by this filer

9 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 11.73

1,875,103 shares short · +1.1% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-04-02	Hoge Elizabeth	10%+ owner	Option exercise	758,001	—	—
2026-04-02	Kalayoglu Murat	10%+ owner	Option exercise	758,001	—	—

Other 13D/G Filings on SELECTA BIOSCIENCES INC

Filed	Form	Filer	Stake	Shares
2026-04-02	SCHEDULE 13D/A	Kalayoglu Murat	19.90%	5,833,971	view →
2025-01-15	SCHEDULE	SPRINGER TIMOTHY A	36.90%	9,555,394	view →
2024-10-15	SC	Kalayoglu Murat	—	—	view →
2024-07-05	SC	SPRINGER TIMOTHY A	—	—	view →
2024-04-12	SC	SPRINGER TIMOTHY A	—	—	view →
2021-12-27	SC	SPRINGER TIMOTHY A	—	—	view →
2021-05-27	SC	SPRINGER TIMOTHY A	—	—	view →
2020-10-23	SC	SPRINGER TIMOTHY A	—	—	view →
2020-10-15	SC	SPRINGER TIMOTHY A	—	—	view →
2020-02-05	SC	ORBIMED ADVISORS LLC	—	—	view →
2020-01-02	SC	SPRINGER TIMOTHY A	—	—	view →
2019-11-13	SC	ORBIMED ADVISORS LLC	—	—	view →
2019-02-04	SC	Polaris Venture Partners V, L.P.	—	—	view →
2018-05-03	SC	Polaris Venture Partners V, L.P.	—	—	view →
2018-01-26	SC	ORBIMED ADVISORS LLC	—	—	view →

Other Filings by SPRINGER TIMOTHY A

Filed	Form	Issuer	Stake	Shares
2025-02-10	SCHEDULE	Tectonic Therapeutic, Inc. TECX	29.20%	4,226,058	view →
2025-01-15	SCHEDULE	Cartesian Therapeutics, Inc. RNAC	36.90%	9,555,394	view →
2024-07-05	SC	Cartesian Therapeutics, Inc. RNAC	—	—	view →
2024-04-12	SC	Cartesian Therapeutics, Inc. RNAC	—	—	view →
2021-12-27	SC	SELECTA BIOSCIENCES INC RNAC	—	—	view →
2021-05-27	SC	SELECTA BIOSCIENCES INC RNAC	—	—	view →
2020-10-23	SC	SELECTA BIOSCIENCES INC RNAC	—	—	view →
2020-10-15	SC	SELECTA BIOSCIENCES INC RNAC	—	—	view →
2020-01-02	SC	SELECTA BIOSCIENCES INC RNAC	—	—	view →

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