N-Q

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

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-0234

Seligman Common Stock Fund, Inc.
(Exact name of Registrant as specified in charter)

100 Park Avenue
New York, New York 10017
(Address of principal executive offices) (Zip code)

Lawrence P. Vogel
100 Park Avenue
New York, New York 10017
(Name and address of agent for service)

Registrant’s telephone number, including area code: (212) 850-1864

Date of fiscal year end:	12/31
Date of reporting period:	3/31/08

FORM N-Q

ITEM 1. SCHEDULE OF INVESTMENTS.

Seligman Common Stock Fund, Inc.

Schedule of Investments (unaudited)

March 31, 2008

	Shares, Shares Subject to Put/Call, or Principal Amount			Value
Common Stocks 93.8%
Aerospace and Defense 2.9%
Boeing		12,100	shs.	$	899,877
General Dynamics		12,400			1,033,788
Honeywell International		33,800			1,906,996
United Technologies		20,700			1,424,574
					5,265,235
Air Freight and Logistics 1.1%
United Parcel Service (Class B)		26,800			1,956,936
Airlines 0.7%
AMR*		52,900			477,158
Delta Air Lines*		41,000			352,600
Northwest Airlines*		42,000			377,580
					1,207,338
Auto Components 0.6%
Goodyear Tire & Rubber*		41,500			1,070,700
Automobiles 0.4%
General Motors		37,400			712,470
Biotechnology 1.9%
Amgen*		17,100			714,438
Cephalon*		29,900			1,925,560
ImClone Systems*		19,600			831,432
					3,471,430
Capital Markets 3.0%
Bank of New York Mellon		20,800			867,984
Fortress Investment Group (Class A)		141,000			1,731,480
Goldman Sachs Group		4,550			752,525
Lehman Brothers Holdings		16,700			628,588
Morgan Stanley		32,900			1,503,530
					5,484,107
Chemicals 0.4%
Monsanto		6,300			702,450
Commercial Banks 2.1%
PNC Financial Services Group		16,200			1,062,234
Wachovia		44,140			1,191,780
Wells Fargo		52,500			1,527,750
					3,781,764
Commercial Services and Supplies 0.6%
Waste Management		31,900			1,070,564
Communications Equipment 6.9%
Cisco Systems*		96,060			2,314,085
Comverse Technology*		291,742			4,523,460
Nokia (ADR)		52,700			1,677,441
QUALCOMM		56,800			2,328,800
Research In Motion*		14,800			1,661,004
					12,504,790
Computers and Peripherals 3.9%
Apple*		13,300			1,908,550
Hewlett-Packard		53,300			2,433,678
International Business Machines		15,100			1,738,614
Seagate Technology		42,657			893,238
					6,974,080
Construction and Engineering 0.8%
Foster Wheeler*		14,200			804,004
Quanta Services*		25,300			586,201
					1,390,205
Consumer Finance 0.7%
American Express		30,500			1,333,460
Containers and Packaging 1.8%
Smurfit-Stone Container*		418,470			3,222,219

Diversified Financial Services 4.1%
Bank of America	79,760	3,023,702
CIT Group	21,600	255,960
JPMorgan Chase	97,250	4,176,888
		7,456,550
Diversified Telecommunication Services 3.1%
AT&T	97,400	3,730,420
Qwest Communications International	172,764	782,621
Time Warner Telecom (Class A)*	70,000	1,084,300
		5,597,341
Electric Utilities 0.8%
Exelon	18,200	1,479,114
Energy Equipment and Services 3.2%
Baker Hughes	13,200	904,200
Halliburton	32,800	1,290,024
Noble	22,100	1,097,707
Schlumberger	16,100	1,400,700
Transocean	8,200	1,108,640
		5,801,271
Food and Staples Retailing 3.3%
CVS/Caremark	34,200	1,385,442
Rite Aid*	1,554,854	4,571,271
		5,956,713
Health Care Equipment and Supplies 1.8%
Baxter International	14,000	809,480
St. Jude Medical*	29,400	1,269,786
Zimmer Holdings*	14,100	1,097,826
		3,177,092
Health Care Providers and Services 1.4%
Express Scripts*	14,800	951,936
Health Net*	7,416	228,413
Quest Diagnostics	20,400	923,508
UnitedHealth Group	10,358	355,901
		2,459,758
Hotels, Restaurants and Leisure 0.8%
Wynn Resorts	14,800	1,489,472
Independent Power Producers and Energy Traders 0.5%
AES*	59,400	990,198
Industrial Conglomerates 2.5%
3M	9,400	744,010
General Electric	103,610	3,834,606
		4,578,616
Insurance 3.6%
American International Group	42,000	1,816,500
Hartford Financial Services Group	24,900	1,886,673
MetLife	27,300	1,645,098
Prudential Financial	15,211	1,190,261
		6,538,532
Internet Software and Services 2.6%
Google (Class A)*	2,500	1,101,175
SAVVIS	113,292	1,843,261
Yahoo!*	61,361	1,775,174
		4,719,610
Life Sciences Tools and Services 0.7%
Applied Biosystems Group	38,600	1,268,396
Machinery 0.9%
Caterpillar	13,400	1,049,086
Deere	7,500	603,300
		1,652,386
Media 3.8%
Comcast (Class A)*	33,000	638,220
Gemstar-TV Guide International*	1,133,342	5,326,707
Time Warner	64,200	900,084
		6,865,011

Metals and Mining 2.3%
Alcoa	45,591	1,644,011
Freeport-McMoRan Copper & Gold (Class B)	26,400	2,540,208
		4,184,219
Multiline Retail 2.2%
Kohl’s*	42,740	1,833,119
Target	43,100	2,184,308
		4,017,427
Oil, Gas and Consumable Fuels 8.4%
Chevron	35,100	2,996,136
ConocoPhillips	29,500	2,248,195
El Paso	111,400	1,853,696
Exxon Mobil	68,430	5,787,809
Valero Energy	17,300	849,603
XTO Energy	23,675	1,464,535
		15,199,974
Pharmaceuticals 7.4%
Abbott Laboratories	30,800	1,698,620
Bristol-Myers Squibb	78,700	1,676,310
Forest Laboratories*	20,500	820,205
Johnson & Johnson	18,800	1,219,556
Merck	41,200	1,563,540
Mylan Laboratories	78,200	907,120
Pfizer	100,238	2,097,981
Schering-Plough	43,500	626,835
Sepracor*	22,600	441,152
Wyeth	55,133	2,302,354
		13,353,673
Semiconductors and Semiconductor Equipment 3.5%
Intel	84,000	1,779,120
Marvell Technology Group*	307,074	3,340,965
NVIDIA*	37,300	738,167
Qimonda (ADR)*	90,869	391,645
		6,249,897
Software 3.4%
Adobe Systems*	3,794	135,028
BMC Software*	24,400	793,488
Microsoft	128,700	3,652,506
Oracle*	78,800	1,541,328
		6,122,350
Specialty Retail 1.6%
Home Depot	26,800	749,596
OfficeMax	116,131	2,222,747
		2,972,343
Thrifts and Mortgage Finance 0.0%
Countrywide Financial	1	6
Tobacco 3.8%
Altria Group	72,200	1,602,840
Philip Morris International*	72,200	3,651,876
UST	29,100	1,586,532
		6,841,248
Wireless Telecommunication Services 0.4%
NII Holdings*	22,700	721,406
Total Common Stocks		169,840,351
Options Purchased* 0.9%
Biotechnology 0.0%
Amgen, Call expiring January 2009 at $60	34,400	23,048
Capital Markets 0.0%
Lehman Brothers Holdings, Call expiring January 2009 at $80	33,800	18,590
Communications Equipment 0.2%
JDS Uniphase, Call expiring January 2009 at $15	87,800	131,700
Motorola, Call expiring January 2009 at $20	94,900	9,490
QUALCOMM, Call expiring January 2009 at $40	27,300	161,070
		302,260

Diversified Financial Services 0.0%
CIT Group, Call expiring January 2009 at $35		26,600		13,300
Citigroup, Call expiring January 2009 at $30		27,800		35,306
				48,606
Food and Staples Retailing 0.0%
Rite Aid, Call expiring January 2009 at $5		308,700		108,045
Hotels, Restaurants and Leisure 0.0%
Starbucks, Call expiring January 2009 at $30		51,000		10,200
Index Derivatives 0.2%
Financial Select Sector SPDR Fund, Put expiring January 2009 at $30		62,300		84,105
Powershare QQQ Trust, Call expiring December 2008 at $48		55,900		137,794
SPDR Trust Series 1, Call expiring December 2008 at $140		14,100		101,520
				323,419
Internet Software and Services 0.3%
Yahoo!, Call expiring January 2009 at $25		63,400		380,400
Yahoo!, Call expiring January 2009 at $30		48,900		124,695
				505,095
Pharmaceuticals 0.1%
Bristol-Myers Squibb, Call expiring January 2009 at $25		39,400		37,036
Wyeth, Call expiring July 2008 at $42.50		36,100		115,520
				152,556
Semiconductors and Semiconductor Equipment 0.1%
Marvell Technology Group, Call expiring January 2009 at $15		86,100		73,185
Marvell Technology Group, Call expiring January 2009 at $20		79,300		19,825
Micron Technology, Call expiring January 2009 at $15		187,200		28,080
				121,090
Total Options Purchased				1,612,909
Short-Term Holdings 6.7%
Equity-Linked Notes† 3.4%
Deutsche Bank:
39%, 9/5/08 (a)	$	1,275,000		1,099,178
Goldman Sachs Group:
35.5%, 4/21/08 (b)		1,715,000		727,417
34.6%, 10/2/08 (c)		1,275,000		1,242,156
Lehman Brothers:
53.51%, 9/14/08 (d)		1,275,000		964,690
39.5%, 10/2/08 (e)		1,275,000		1,237,387
Morgan Stanley:
43.3%, 5/15/08 (f)		1,632,000		919,975
Total Equity-Linked Notes				6,190,803
Time Deposit 3.3%
Bank of Montreal, 2.25%, 4/1/2008		5,986,000		5,986,000
Total Short-Term Investments				12,176,803
Total Investments 101.4%				183,630,063
Other Assets Less Liabilities (1.4)%				(2,537,959	)
Net Assets 100.0%			$	181,092,104

* Non-income producing security.

ADR - American Depositary Receipts.

† The security may be offered and sold only to a “qualified institutional buyer” under Rule 144A of the Securities Act of 1933. These notes are exchangeable at maturity, based on the terms of the respective notes, for shares of common stock of a company or cash at a maturity value which is generally determined as follows:

The principal amount of the notes plus or minus the lowest return of the companies’ respective stock prices determined at maturity from the date of purchase of the notes:

(a)	Oracle, Schering-Plough and Target.
(b)	Comverse Technology, Northwest Airlines and Qwest Communications International.
(c)	Adobe Systems, UnitedHealth Group and Wyeth.
(d)	Delta Air Lines, Intel and Mylan.
(e)	Health Net, Kohl’s and Prudential Financial.
(f)	NII Holdings, Office Depot and Qwest Communications International.

As of March 31, 2008, the cost of investments for federal income tax purposes was $211,397,908. The tax basis gross appreciation and depreciation of portfolio securities were $9,709,244 and $37,477,089, respectively. Net unrealized depreciation was $27,767,845.

Security Valuation — Securities traded on an exchange are valued at the last sales price on the primary exchange or market on which they are traded. Securities not listed on an exchange or security market, or securities for which there is no last sales price, are valued at the mean of the most recent bid and asked prices or are valued by J. & W. Seligman & Co. Incorporated (the “Manager”) based on quotations provided by primary market makers in such securities. Securities for which market quotations are not readily available (or are otherwise no longer valid or reliable) are valued at fair value determined in accordance with procedures approved by the Board of Directors. This can occur in the event of, among other things, natural disasters, acts of terrorism, market disruptions, intra-day trading halts, and extreme market volatility. The determination of fair value involves subjective judgments. As a result, using fair value to price a security may result in a price materially different from the prices used by other mutual funds to determine net asset value or the price that may be realized upon the actual sale of the security. Short-term holdings maturing in 60 days or less are valued at current market quotations or amortized cost if the Manager believes it approximates fair value. Short-term holdings that mature in more than 60 days are valued at current market quoatations until the 60th day prior to maturity and are then valued as described above for securities maturing in 60 days or less.

Fair Value Measurement - On January 1, 2008, the Fund adopted Statement of Financial Accounting Standards No. 157 (“SFAS 157”), “Fair Value Measurements.” SFAS 157 establishes a three-tier hierarchy to classify the assumptions, referred to as inputs, used in valuation techniques (see Security Valuation above) to measure fair value of the Fund’s investments. These inputs are summarized in three broad levels: Level 1 – quoted prices in active markets for identical investments; Level 2 – other significant observable inputs (including quoted prices in inactive markets or for similar investments); and Level 3 – significant unobservable inputs (including the Fund’s own assumptions in determining fair value). The inputs or methodology used for valuing securities may not be an indication of the risk associated with investing in those securities.

The following is a summary of the value of the Fund’s investments as of March 31, 2008 based on the level of inputs used:

Valuation Inputs	Value
Level 1 - Quoted Prices	$	171,453,260
Level 2 - Other Significant Observable Inputs		12,176,803
Level 3 - Significant Unobservable Inputs		0
Total	$	183,630,063

Risk - To the extent that the Fund invests a substantial percentage of its assets in an industry, the Fund’s performance may be negatively affected if that industry falls out of favour. Stocks of large-capitalization companies have at times experienced periods of volatility and negative performance. During such periods, the value of such stocks may decline and the Fund’s performance may be negatively affected.

ITEM 2. CONTROLS AND PROCEDURES.

	a.	The registrant’s principal executive officer and principal financial officer have concluded, based upon their evaluation of the registrant’s disclosure controls and procedures as conducted within 90 days of the filing date of this report, that these disclosure controls and procedures provide reasonable assurance that material information required to be disclosed by the registrant in the report it files or submits on Form N-Q is recorded, processed, summarized and reported, within the time periods specified in the Commission’s rules and forms and that such material information is accumulated and communicated to the registrant’s management, including its principal executive officer and principal financial officer, as appropriate, in order to allow timely decisions regarding required disclosure.
	b.	The registrant’s principal executive officer and principal financial officer are aware of no changes in the registrant’s internal control over financial reporting that occurred during the registrant’s last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.
ITEM 3. EXHIBITS.
	(a)	Certifications of principal executive officer and principal financial officer as required by Rule 30a-2(a) under the Investment Company Act of 1940.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SELIGMAN COMMON STOCK FUND, INC.

By:	/S/ BRIAN T. ZINO
	Brian T. Zino
	President and Chief Executive Officer
Date:	May 27, 2008

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant in the capacities and on the dates indicated.

By:	/S/ BRIAN T. ZINO
	Brian T. Zino
	President and Chief Executive Officer
Date:	May 27, 2008
By:	/S/ LAWRENCE P. VOGEL
	Lawrence P. Vogel
	Vice President, Treasurer and Chief Financial Officer
Date:	May 27, 2008

SELIGMAN COMMON STOCK FUND, INC.

EXHIBIT INDEX

(a) Certifications of principal executive officer and principal financial officer as required by Rule 30a-2(a) under the Investment Company Act of 1940.

EX-99.CERT

EX.99 CERT
Exhibit (a)
CERTIFICATIONS

I, Brian T. Zino, certify that:

1.	I have reviewed this report on Form N-Q of Seligman Common Stock Fund, Inc.;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the schedule of investments included in this report, fairly presents in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed;
4.	The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:
	a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and
	d)	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.	The registrant’s other certifying officer and I have disclosed, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
	a)	All significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and
	b)	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 27, 2008

/S/ BRIAN T. ZINO

Brian T. Zino
Principal Executive Officer

I, Lawrence P. Vogel, certify that:

1.	I have reviewed this report on Form N-Q of Seligman Common Stock Fund, Inc.;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the schedule of investments included in this report, fairly presents in all material respects the investments of the registrant as of the end of the fiscal quarter for which the report is filed;
4.	The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:
	a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report, based on such evaluation; and
	d)	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5.	The registrant’s other certifying officer and I have disclosed, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
	a)	All significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and
	b)	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 27, 2008

/S/ LAWRENCE P. VOGEL

Lawrence P. Vogel
Principal Financial Officer