John F. Sheridan

CIK: 0001365369

Transaction Breakdown

Open Market Buys (P)1 (1.9%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)23 (43.4%)

Derivative conversions

Awards (A)6 (11.3%)

Compensation grants

Other (G, F, J, C, D, …)23 (43.4%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

TNDM

TANDEM DIABETES CARE INC

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (53 total)

TNDM
TANDEM DIABETES CARE INC
Aug 15, 2026
Tax Payment(F)
Direct
5.1K shares at avg. $22.72$115K
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2026
Exercise(M)
Direct
6K shares-
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2026
Exercise(M)
Direct
9.9K shares-
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2026
Tax Payment(F)
Direct
3K shares at avg. $22.72$69K
TNDM
TANDEM DIABETES CARE INC
May 29, 2026
Award(A)
Restricted Stock Unit
Direct
191.1K shares-
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Exercise(M)
Direct
6K shares-
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Tax Payment(F)
Direct
18.9K shares at avg. $12.82$243K
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Tax Payment(F)
Direct
3K shares at avg. $12.82$39K
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Exercise(M)
Direct
39.7K shares-
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Exercise(M)
Direct
5.5K shares-
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Award(A)
Direct
1.3K shares at avg. $10.90$15K
TNDM
TANDEM DIABETES CARE INC
May 15, 2026
Tax Payment(F)
Direct
2.8K shares at avg. $12.82$36K
TNDM
TANDEM DIABETES CARE INC
Feb 17, 2026
Exercise(M)
Direct
6K shares-
TNDM
TANDEM DIABETES CARE INC
Feb 17, 2026
Tax Payment(F)
Direct
2.4K shares at avg. $18.95$45K
TNDM
TANDEM DIABETES CARE INC
Feb 17, 2026
Exercise(M)
Direct
5.5K shares-
TNDM
TANDEM DIABETES CARE INC
Feb 17, 2026
Tax Payment(F)
Direct
2K shares at avg. $18.95$37K
TNDM
TANDEM DIABETES CARE INC
Nov 17, 2025
Tax Payment(F)
Direct
2.8K shares at avg. $18.61$52K
TNDM
TANDEM DIABETES CARE INC
Nov 17, 2025
Exercise(M)
Direct
5.5K shares-
TNDM
TANDEM DIABETES CARE INC
Nov 17, 2025
Exercise(M)
Direct
6K shares-
TNDM
TANDEM DIABETES CARE INC
Nov 17, 2025
Tax Payment(F)
Direct
3K shares at avg. $18.61$57K
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2025
Exercise(M)
Direct
6K shares-
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2025
Tax Payment(F)
Direct
2.8K shares at avg. $10.82$30K
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2025
Exercise(M)
Direct
5.5K shares-
TNDM
TANDEM DIABETES CARE INC
Aug 15, 2025
Tax Payment(F)
Direct
3K shares at avg. $10.82$33K
TNDM
TANDEM DIABETES CARE INC
Aug 11, 2025
Purchase(P)
Direct
10K shares at avg. $10.23$102K

		Type	Shares	Price		Ownership
Aug 15, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	5,055	$22.72	$114,850	Direct
Aug 15, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,982	-	$0	Direct
Aug 15, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	9,934	-	$0	Direct
Aug 15, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	3,044	$22.72	$69,160	Direct
May 29, 2026	TNDM TANDEM DIABETES CARE INC	Award(A) Restricted Stock Unit	191,103	-	-	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,982	-	$0	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	18,944	$12.82	$242,862	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	3,044	$12.82	$39,024	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	39,735	-	$0	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,472	-	$0	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Award(A)	1,336	$10.90	$14,562	Direct
May 15, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	2,785	$12.82	$35,704	Direct
Feb 17, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,983	-	$0	Direct
Feb 17, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	2,400	$18.95	$45,480	Direct
Feb 17, 2026	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,471	-	$0	Direct
Feb 17, 2026	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	1,963	$18.95	$37,199	Direct
Nov 17, 2025	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	2,779	$18.61	$51,717	Direct
Nov 17, 2025	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,472	-	-	Direct
Nov 17, 2025	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,982	-	-	Direct
Nov 17, 2025	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	3,038	$18.61	$56,537	Direct
Aug 15, 2025	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,982	-	-	Direct
Aug 15, 2025	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	2,779	$10.82	$30,069	Direct
Aug 15, 2025	TNDM TANDEM DIABETES CARE INC	Exercise(M)	5,471	-	-	Direct
Aug 15, 2025	TNDM TANDEM DIABETES CARE INC	Tax Payment(F)	3,038	$10.82	$32,871	Direct
Aug 11, 2025	TNDM TANDEM DIABETES CARE INC	Purchase(P)	10,000	$10.23	$102,318	Direct

1-25 of 53 transactions

About Sheridan John F

Sheridan John F (SEC CIK 0001365369) files insider reports with the SEC as PRESIDENT & CEO of TANDEM DIABETES CARE INC (TNDM).

Signal8 holds 12 ownership filings by Sheridan John F, all Form 4s, filed between Nov 19, 2024 and Aug 18, 2026. Those filings report 53 transactions, from Nov 15, 2024 to Aug 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Sheridan John F's filings is in SAN DIEGO, CA.

Recent filings by Sheridan John F

Aug 15, 2026: Tax withholding of TNDM shares (Form 4, code F).
Aug 15, 2026: Option exercises of TNDM shares (2 lines, Form 4, code M).
Aug 15, 2026: Tax withholding of TNDM shares (Form 4, code F).
May 29, 2026: Grant or award of TNDM derivative securities (Form 4, code A).
May 15, 2026: Option exercise of TNDM shares (Form 4, code M).

Other insiders filing for TANDEM DIABETES CARE INC (TNDM)

TWOMEY CHRISTOPHER J, Director
Kyrillos Jean-Claude, EVP & Chief Operating Officer
Vosseller Leigh, EVP & CHIEF FINANCIAL OFFICER
Morrison Susan, EVP & Chief Admin. Officer
Gasser Elizabeth Anne, EVP, Chief Strategy Officer
Carpenter Rick, EVP & Chief Technology Officer

How to read Form 4 transaction codes