RTSN: Keller Eric L. bought $250K of stock

By AlphaYouPublished Oct 13, 2026Form 4

Stocks in this disclosure

Reported activity

Keller Eric L.

Reporting filer

Keller Eric L. reported buying 20,800 shares of Retension Pharmaceuticals, Inc. for about $250K ($12.00 a share on average). Form 4 filed Oct 13, 2026 lists 6 entries.

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Disclosed: Oct 13, 2026

Reported details

6 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Filed terms and references
Common Stock	Keller Eric L.	2026-10-13	P	Purchase	20800	12.00	423,377	Filed terms security Title: Common Stock transaction Date: 2026-10-13 deemed Execution Date: transaction Form Type: 4 transaction Code: P equity Swap Involved: 0 transaction Timeliness: transaction Shares: 20800 transaction Price Per Share: 12.00 transaction Acquired Disposed Code: A shares Owned Following Transaction: 423377 direct Or Indirect Ownership: D
Common Stock	Keller Eric L.	2026-10-13	C	Conversion	9662	Not stated (see footnotes)	433,039	Filed terms security Title: Common Stock transaction Date: 2026-10-13 deemed Execution Date: transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Timeliness: transaction Shares: 9662 id: F1 transaction Acquired Disposed Code: A shares Owned Following Transaction: 433039 direct Or Indirect Ownership: D
Common Stock	Keller Eric L.	2026-10-13	C	Conversion	31368	Not stated (see footnotes)	464,407	Filed terms security Title: Common Stock transaction Date: 2026-10-13 deemed Execution Date: transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Timeliness: transaction Shares: 31368 id: F2 transaction Acquired Disposed Code: A shares Owned Following Transaction: 464407 direct Or Indirect Ownership: D
Stock Option (right to buy) (derivative)	Keller Eric L.	2026-10-13	A	Grant or award	255174	0	255,174	Filed terms security Title: Stock Option (right to buy) id: F3 conversion Or Exercise Price: 11.63 transaction Date: 2026-10-13 deemed Execution Date: transaction Form Type: 4 transaction Code: A equity Swap Involved: 0 transaction Timeliness: transaction Shares: 255174 transaction Price Per Share: 0 transaction Acquired Disposed Code: A id: F3 expiration Date: 2036-10-13 underlying Security Title: Common Stock underlying Security Shares: 255174 shares Owned Following Transaction: 255174 direct Or Indirect Ownership: D
Series A Convertible Preferred Stock (derivative)	Keller Eric L.	2026-10-13	C	Conversion	9662	Not stated (see footnotes)	0	Filed terms security Title: Series A Convertible Preferred Stock id: F1 transaction Date: 2026-10-13 deemed Execution Date: transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Timeliness: transaction Shares: 9662 id: F1 transaction Acquired Disposed Code: D id: F1 id: F1 underlying Security Title: Common Stock underlying Security Shares: 9662 shares Owned Following Transaction: 0 direct Or Indirect Ownership: D
Series B Convertible Preferred Stock (derivative)	Keller Eric L.	2026-10-13	C	Conversion	31368	Not stated (see footnotes)	0	Filed terms security Title: Series B Convertible Preferred Stock id: F2 transaction Date: 2026-10-13 deemed Execution Date: transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Timeliness: transaction Shares: 31368 id: F2 transaction Acquired Disposed Code: D id: F2 id: F2 underlying Security Title: Common Stock underlying Security Shares: 31368 shares Owned Following Transaction: 0 direct Or Indirect Ownership: D

Common Stock

Owner: Keller Eric L.
Date: 2026-10-13
Code: P
Action: Purchase
Quantity: 20800
Price: 12.00
Following holdings: 423,377
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: P
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 20800
transaction Price Per Share: 12.00
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 423377
direct Or Indirect Ownership: D

Common Stock

Owner: Keller Eric L.
Date: 2026-10-13
Code: C
Action: Conversion
Quantity: 9662
Price: Not stated (see footnotes)
Following holdings: 433,039
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 9662
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 433039
direct Or Indirect Ownership: D

Common Stock

Owner: Keller Eric L.
Date: 2026-10-13
Code: C
Action: Conversion
Quantity: 31368
Price: Not stated (see footnotes)
Following holdings: 464,407
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 31368
id: F2
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 464407
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Owner: Keller Eric L.
Date: 2026-10-13
Code: A
Action: Grant or award
Quantity: 255174
Price: 0
Following holdings: 255,174
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
id: F3
conversion Or Exercise Price: 11.63
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: A
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 255174
transaction Price Per Share: 0
transaction Acquired Disposed Code: A
id: F3
expiration Date: 2036-10-13
underlying Security Title: Common Stock
underlying Security Shares: 255174
shares Owned Following Transaction: 255174
direct Or Indirect Ownership: D

Series A Convertible Preferred Stock (derivative)

Owner: Keller Eric L.
Date: 2026-10-13
Code: C
Action: Conversion
Quantity: 9662
Price: Not stated (see footnotes)
Following holdings: 0
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Series A Convertible Preferred Stock
id: F1
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 9662
id: F1
transaction Acquired Disposed Code: D
id: F1
id: F1
underlying Security Title: Common Stock
underlying Security Shares: 9662
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D

Series B Convertible Preferred Stock (derivative)

Owner: Keller Eric L.
Date: 2026-10-13
Code: C
Action: Conversion
Quantity: 31368
Price: Not stated (see footnotes)
Following holdings: 0
Reporting delay: 0 days
Filed terms and references: Filed terms
security Title: Series B Convertible Preferred Stock
id: F2
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 31368
id: F2
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Common Stock
underlying Security Shares: 31368
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Keller Eric L.: CHIEF EXECUTIVE OFFICER, Director.
F1: Each share of Series A Convertible Preferred Stock (the "Series A Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series A Preferred Stock had no expiration date.
F2: Each share of Series B Convertible Preferred Stock (the "Series B Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock had no expiration date.
F3: Option award granted pursuant to the Issuer's 2026 Equity Incentive Plan. Twenty-five percent of the stock option vests on August 14, 2027, with the remaining stock options vesting in 36 monthly increments thereafter, subject to the Reporting Person's continued service to the Issuer on each vesting date.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

Keller Eric L.

2026-10-13

Purchase

20800

12.00

423,377

0 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: P
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 20800
transaction Price Per Share: 12.00
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 423377
direct Or Indirect Ownership: D

Common Stock

Keller Eric L.

2026-10-13

Conversion

9662

Not stated (see footnotes)

433,039

0 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 9662
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 433039
direct Or Indirect Ownership: D

Common Stock

Keller Eric L.

2026-10-13

Conversion

31368

Not stated (see footnotes)

464,407

0 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 31368
id: F2
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 464407
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Keller Eric L.

2026-10-13

Grant or award

255174

255,174

0 days

Filed terms

security Title: Stock Option (right to buy)
id: F3
conversion Or Exercise Price: 11.63
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: A
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 255174
transaction Price Per Share: 0
transaction Acquired Disposed Code: A
id: F3
expiration Date: 2036-10-13
underlying Security Title: Common Stock
underlying Security Shares: 255174
shares Owned Following Transaction: 255174
direct Or Indirect Ownership: D

Series A Convertible Preferred Stock (derivative)

Keller Eric L.

2026-10-13

Conversion

9662

Not stated (see footnotes)

0 days

Filed terms

security Title: Series A Convertible Preferred Stock
id: F1
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 9662
id: F1
transaction Acquired Disposed Code: D
id: F1
id: F1
underlying Security Title: Common Stock
underlying Security Shares: 9662
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D

Series B Convertible Preferred Stock (derivative)

Keller Eric L.

2026-10-13

Conversion

31368

Not stated (see footnotes)

0 days

Filed terms

security Title: Series B Convertible Preferred Stock
id: F2
transaction Date: 2026-10-13
deemed Execution Date:
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 31368
id: F2
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Common Stock
underlying Security Shares: 31368
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Keller Eric L.: CHIEF EXECUTIVE OFFICER, Director.

F1: Each share of Series A Convertible Preferred Stock (the "Series A Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series A Preferred Stock had no expiration date.

F2: Each share of Series B Convertible Preferred Stock (the "Series B Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock had no expiration date.

F3: Option award granted pursuant to the Issuer's 2026 Equity Incentive Plan. Twenty-five percent of the stock option vests on August 14, 2027, with the remaining stock options vesting in 36 monthly increments thereafter, subject to the Reporting Person's continued service to the Issuer on each vesting date.