SEC FORM 4

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

SEIDL JOHN M

(Last)

(First)

(Middle)

1776 LINCOLN ST

STE 700

(Street)

DENVER

80203

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
ST MARY LAND & EXPLORATION CO [ SM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/24/2005

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock; $.01 Par Value	10/24/2005		M		4,000	A	$6.2188	19,231	D
Common Stock; $.01 Par Value	10/24/2005		M		4,000	A	$8.75	23,231	D
Common Stock; $.01 Par Value	10/24/2005		M		8,984	A	$4.625	32,215	D
Common Stock; $.01 Par Value	10/24/2005		M		8,064	A	$6.1875	40,279	D
Common Stock; $.01 Par Value	10/24/2005		S		22,800	D	$32.4	17,479	D
Common Stock; $.01 Par Value	10/24/2005		S		100	D	$32.41	17,379	D
Common Stock; $.01 Par Value	10/24/2005		S		100	D	$32.43	17,279	D
Common Stock; $.01 Par Value	10/24/2005		S		448	D	$32.44	16,831	D
Common Stock; $.01 Par Value	10/24/2005		S		1,200	D	$32.45	15,631	D
Common Stock; $.01 Par Value	10/24/2005		S		300	D	$32.46	15,331	D
Common Stock; $.01 Par Value	10/24/2005		S		100	D	$32.47	15,231	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$6.2188	10/24/2005		M			4,000	12/31/1996⁽¹⁾	12/31/2006	Common Stock	4,000	$0	0	D
Stock Option (Right to Buy)	$8.75	10/24/2005		M			4,000	12/31/1997⁽²⁾	12/31/2007	Common Stock	4,000	$0	0	D
Stock Option (Right to Buy)	$4.625	10/24/2005		M			8,984	12/31/1998⁽³⁾	12/31/2008	Common Stock	8,984	$0	0	D
Stock Option (Right to Buy)	$6.1875	10/24/2005		M			8,064	12/31/1999⁽⁴⁾	12/31/2009	Common Stock	8,064	$0	0	D

Explanation of Responses:

1. The option vested in four equal installments on December 31, 1996, 1997, 1998 and 1999.

2. The option vested in four equal installments on December 31, 1997, 1998, 1999 and 2000.

3. The option vested in four equal installments on December 31, 1998, 1999, 2000 and 2001.

4. The option vested in four equal installments on December 31, 1999, 2000, 2001 and 2002.

	Karin M. Writer (Attorney-In-Fact)	10/26/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.