Exhibit 99.1

East Coast Analyst Meetings March 2006 |
Good afternoon!
I am Russ Strobel, Chairman, President and Chief Executive Officer of Nicor.
With me today are Rick Hawley, Chief Financial Officer and Mark Knox, Director of Investor Relations.
1

Agenda Long-term Objectives Business Overview and Strategies Financial and Regulatory Update Wrap-up |
Here is today’s agenda.
I’ll briefly cover our long-term objectives and give an overview of our businesses.
Rick will then follow with an update on our financial performance and rate case rehearing.
I’ll then return to wrap things up and we’ll take your questions.
2

Caution Concerning Forward- Looking Statements This speech includes certain forward-looking statements about the operations and earnings expectations of Nicor Inc., its subsidiaries and other affiliates. Although Nicor believes these statements are based on reasonable assumptions, actual results may vary materially from stated expectations. Factors that could cause materially different results can be found in Nicor's most recent periodic report filed with the Securities and Exchange Commission. |
Due to requirements around non-selective disclosure we will address only questions concerning matters that have been previously made public and broadly disseminated.
Please keep this in mind when asking your questions and considering our responses.
3

Primary Businesses Containerized Shipping Wholesale Energy Services Retail Services Gas Distribution |
Nicor continues to be built on the foundation oftwo core businesses.
| • | | Our natural gas distribution segment,Nicor Gas, and |
|
| • | | Our containerized shipping segment,Tropical Shipping. |
We also haveother energy-related businesses, which are built on the:
| • | | assets, |
|
| • | | expertise, |
|
| • | | customer base, |
|
| • | | reputation, and |
|
| • | | location of Nicor Gas. |
Supporting these businesses is a solid financial position, providing us withflexibility to take advantage ofnew investment opportunities and to consider other alternatives to create shareholder value.
4

Steady earnings growth Maintain high returns on equity Pay solid dividend Rebuild earnings at Nicor Gas Continue to expand our shipping operations Develop new products and services in our retail energy businesses Capitalize on capabilities of our wholesale energy services business Maintain our financial strength Objectives and Strategies Financial Objectives Key Strategies |
Over the years, we have remained committed to three simple objectives:
| • | | providing steady earnings growth, |
|
| • | | maintaining high returns on equity, and |
|
| • | | paying a solid dividend. |
To achieve these objectives, we are committed to actions that will improve our performance:
| • | | Grow our core businesses by rebuilding earnings at Nicor Gas and further expanding our shipping operations, |
|
| • | | Develop new products and services in our retail energy businesses, |
|
| • | | Capitalize on the capabilities of our wholesale energy services businessand |
|
| • | | Maintain our financial strength. |
5

Business Strategies Approach Disciplined and systematic Synergies and strategic fit with core businesses Foundation Strong financial position Large customer base Strategic locations and assets Successful unregulated businesses Solid management team |
Our approach to grow our business over the long-term has been and willremain disciplined and systematic.
Any opportunities we pursue will havea direct synergy and strategic fit with our core businesses.
Looking ahead, I believe we have several factors that will contribute to our long-term success including:
| • | | astrong financial position, |
|
| • | | large customer base, |
|
| • | | strategic locations and assets, and |
|
| • | | successful unregulated businesses. |
Supporting these distinguishing qualities is asolid and diverse management team.
Let me now discuss our businesses and strategies in more detail.
6

Rockford Bloomington Naperville Joliet Chicago Peoria Springfield Nicor Gas Profile Gas distribution 2.1 million customers Diverse customer base Customer growth Premium service territory Operating efficiency Significant supply assets Strategic location Solid balance sheet |
Let me start with our primary business — Nicor Gas.
• | | Nicor Gas is one of the largest natural gas distributors in the nation |
|
• | | We serve over2.1 million customers in northern Illinois — excluding the city of Chicago. |
|
• | | We have a reputation for providingsafe, reliable cost effective service. |
|
• | | We serve one of thebest markets for natural gas in the nation: |
| • | | with adiverse mix of industries, |
|
| • | | consistentgrowth in customers, and |
|
| • | | a high demand forspace heating. |
• | | We have a long history of low base rates. |
|
• | | We are at or near thetop for most efficiency measures in our industry. |
|
• | | We have significantunderground storage assets — about 150 BCF of company owned top storage capacity. |
|
• | | We are strategically located on the nation’sMidwest natural gas pipeline grid– with access to8 interstate pipelines. |
|
• | | And we have anexcellent balance sheet – which Rick will discuss shortly. |
7

Business Environment Key Strategies Obtained rate relief in fall of 2005 High gas prices and volatility Demand erosion Increased costs of doing business Manage controllable cost increases Improve operating effectiveness Evaluate potential rate relief mechanisms Provide quality customer service Nicor Gas |
Nicor Gas is a financially solid company.
Last fall, the Illinois Commerce Commission granted Nicor Gas an annual increase in base rates – our first rate increase in nearly 10 years.
We estimate the actual net revenue increase is about $35 million. Certain limited aspects of the final rate order are subject torehearing. The ICC is expected to issue itsdecision on the rehearingthis month.
Our rate increase was apositive step towards rebuilding the earnings levels of Nicor Gas.
However, itmay not be enough, particularlygiven the financial impacts of gas prices that have reached historic levels.
Like most LDCs,high and volatile natural gas prices can impact our financial results in a number of ways –
| • | | Residential customers are more apt toconserve energy and purchase new energy-efficientheating systems, |
|
| • | | Demand in certaincommercial/industrial sectors diminishes; and |
|
| • | | Bad debt and otheroperatingcosts(e.g. company use, storage-related and customer response)increase. |
Nicor Gas’cost of business, exclusive of the effects of gas prices, have also increased, due in large part to higher depreciation, health care, labor and compliance-related costs.
8
To address these conditions, we haverenewed our focus onmanaging operating costs wecan control and onimproving the overall effectiveness of our operations. |
|
We will alsocontinue to evaluate potential rate relief mechanisms that would allow us to mitigate the impact of higher natural gas costs. |
|
Whilemanaging our results for our investors, we will alsomaintain our pledge to provide quality customer service. |
|
These commitments toefficient operations andquality customer service have long been part of our heritage and this culture still holds true today. |
9

Headquarters and terminal Ports served Containerized shipping in the Caribbean and Bahamas High market shares in ports served Excellent reputation Strong margins Experienced management team Tropical Shipping |
Our second core business is Tropical Shipping.
Tropical Shipping is:
| • | | Amajor carrier of exports from the U.S. east coast and Canada to the Caribbean and Bahamas. |
|
| • | | It isone of the largest transporters of containerized cargo in its service territory. |
|
| • | | It isa niche player with assets customized for its region. |
|
| • | | It hasleading market shares in most of the ports it serves. |
|
| • | | And, it is built on areputation for on-time, high-quality service. |
Tropical posted itssecond consecutive year of record results in 2005.
| • | | Operating income was up nearly 28 percent compared with 2004, and 2004 was up 39 percent compared to 2003. |
|
| • | | Tropical also continues to generategood internal cash flow. |
|
| • | | And hasan experienced and capable management team. |
10

Business Environment Key Strategies Improving economic conditions Inter-island transshipment opportunities Tax reorganization benefits Fuel prices Stricter compliance- related requirements Changing competitors and customer base Continue to grow and expand the business Strategic niche acquisitions Improve productivity and service delivery Tropical Shipping |
Tropical earnings are expected to remain strong over the long-term –
| • | | Average shipping rates are expected to improve. |
|
| • | | Volumes shipped are expected to remain strong due to improvedtourism and tourist-related construction activities and inter-island transshipment opportunities. |
We have also taken steps pursuant to provisions of the American Jobs Creation Act topotentially reduce the federal income tax impact on Tropical’s ongoing earnings – Rick will discuss this in more detail shortly.
Despite this upside potential, Tropical’s performance may face challenges from –
| • | | Increases in fuel prices, |
|
| • | | Stricter compliance-related requirements, |
|
| • | | New competitors, |
|
| • | | And changes in our customer base (i.e. UPS/Federal Express and Wal-Mart/Home Depot). |
Still, over the years, Tropical has been able to grow its business through a combination of –
| • | | Opportunistic expansion, and |
|
| • | | Niche acquisitions. |
Going forward, the company plans tocontinue with this approach.
Tropical will also further enhance its market position by
| • | | Streamlining customer sensitive processes, |
|
| • | | Improving productivity, and |
|
| • | | Enhancing service-related activities company-wide. |
11

Other Energy-Related Ventures - Retail Services Rockford Bloomington Naperville Joliet Chicago Peoria Springfield HVAC services Nicor Services - provider of energy-related products and services service line protection warranty products HVAC and replacement services call center services Nicor Solutions - utility-bill management products |
Let me now turn to our other energy-related ventures, starting with ourretail energy businesses.
Nicor’s retail energy businesses have continued to grow and today have over500,000 recurring customer contracts – a substantial change from the27,000 contracts it had when it began in 1998.
Our main businesses under the retail services platform areNicor Services and Nicor Solutions.
These businesses offer a range of energy-related products and services including:
| • | | warranty contracts on residential heating and cooling systems, |
|
| • | | utility billing management products, |
|
| • | | HVAC-related services, and |
|
| • | | call center activities. |
Earlier this year, we introduced another new business – a certified alternative gas supplier in Illinois that will offer commodity-based products.
Driven in large part by new customer contracts and new product offerings, these businesses have made meaningful contributions to our overall earnings in recent years.
12

Other Energy-Related Ventures - Wholesale Energy Services Enerchange Wholesale natural gas marketing Provides Retail commodity support Hub Administration Marketing administration of regulated storage assets Balancing, parking and wheeling services Wisconsin Iowa Kentucky Indiana Missouri Illinois Nicor Gas Service Area Interstate Pipelines Nicor Transmission System Nicor Storage Fields |
We also have wholesalesupply-related businesses.
Our wholesale energy services platform consists of two businesses – Nicor Enerchange and Horizon Pipeline
Nicor Enerchange focuses oncontracting, acquiring and utilizing midstream assets along corridors to Midwest markets.
Specifically, Enerchange engages in thewholesale marketingof natural gas supply related services to others including intrastate and interstate pipelines, LDC’s, power generators, natural gas marketers and brokers, and end-users.
Enerchange also -
| • | | Manages financial derivatives andprocures commodity to support our retail services products (i.e. fixed bill and commodity-based product), and |
|
| • | | Administers the marketing of transportation and storage services using underutilized storage assets of our Chicago Hub – a Nicor Gas business that provides interruptible transportation and storage services to LDC’s and interstate pipeline shippers. |
Bybundling commodity with natural gas transportation and storage, Enerchange customizes services that provideadded value to customers.
13

Springfield Other Energy-Related Ventures - Wholesale Energy Services Horizon Pipeline Joint Venture with NGPL 70-mile pipeline with 380 MMcf/day capacity Strategically located Nicor Gas primary subscriber Extension and Expansion potential |
Our other wholesale energy services business isHorizon Pipeline.
| • | | Horizon, became operational in 2002, and is a50/50 joint venture between Nicor andNatural Gas Pipeline Company of America, asubsidiary of Kinder Morgan. |
|
| • | | The70-mile pipeline, runs between Joliet, Ill., north to a point near the Wisconsin border, has 380 MMcf/day capacity and is nearly fully subscribed. |
• | | Horizon isstrategically located within the preferred development corridor of potential future power generators, which provides key competitive advantages over other pipeline alternatives in our territory. |
|
• | | It also is expandable having strategic extension and expansion potential to meet economic growth in the region. |
14

Retail Services Wholesale Services Increase market share of existing products and services Develop new products and services Expand into new markets Improve operating efficiencies and effectively manage risks Optimize the use of supply-related assets Expand storage and transmission capabilities Build a commercial and industrial end-user customer base Acquire, contract or develop new assets Support our retail commodity products Other Energy-Related Ventures - Strategies |
Overall, our other energy-related ventures are a keycomponent of our business strategies.
For ourretail services, we are taking a structured approach to developing this segment by:
| • | | increasing the market share of current products and services in Nicor’s existing territory, |
|
| • | | bydeveloping new products and services such as commodity-based products, utility service connection calls and Internet-based utility connection services, |
|
| • | | byevaluating expansion opportunities into areasoutside of our existing territories, and |
|
| • | | by continuing toimprove operating efficiencies andeffectively managing risks. |
For ourwholesale energy services, we want tooptimize the use of storage and transmission assets to improve our long-term earnings.
Additional opportunities for growing this business may exist by:
| • | | expanding the geographic reach of our storage and transmission capabilities, |
|
| • | | building a commercial/industrial end-user customer base in our utility’s territory, |
|
| • | | acquiring, contracting or developing new assets, and/or |
|
| • | | providing support for our retail company’s commodity products, |
Let me now turn things over to Rick for a financial and regulatory update.
15

Financial Update 2005 Annual EPS 2005 2004 Reported diluted EPS 3.07 1.7 Absent noteworthy items 2.28 2.22 |
Thanks Russ.
In February, we reported year-end 2005 earnings per share of $3.07 compared to $1.70 per share for the same 2004 period. Both years included the impacts of noteworthy items.
2005 financial results included net D&O insurance recoveries related to a shareholder derivative settlement in January 2005 and securities class action settlement in 2004; and an income tax benefit due to a foreign earnings repatriation in December 2005. Combined, these items contributed $.79 per share to our 2005 results. Absent these impacts, 2005 results would have been about $2.28 per share.
2004 financial results included a $38.5 million pretax litigation charge ($.52 per share) relating to the settlement of securities class actions. Absent this impact, 2004 results would have been $2.22 per share.
In addition to the effects of the noteworthy items I just discussed, 2005 earnings also reflected higher operating results in our shipping business and lower corporate-related costs, offset in part by lower operating results in our gas distribution business and other energy-related ventures.
16

Impact of American Jobs Creation Act Repatriated $132 million of foreign earnings in December 2005 Repatriated amounts were funded by excess cash and a $40 million two-year term loan Fourth quarter 2005 financial statements included a tax benefit from the repatriation of $17 million Effective January 1, 2006, Tropical's operations were reorganized to provide the opportunity to reduce the federal income tax impact on its ongoing earnings |
Before I discuss our 2006 outlook, let me talk briefly about our repatriation of earnings of foreign subsidiaries under the American Jobs Creation Act.
The Jobs Act contained a provision through December 31, 2005, that established favorable tax treatment for companies like Tropical thatrepatriate retained earnings of their foreign affiliates by providing, on a one-time basis, for the potential to pay federal incomes taxes at a rate of 5.25% on certain repatriated earnings versus a rate of 35% in 2005.
During December 2005, Tropical Shipping repatriated approximately $132 million of cumulative undistributed foreign earnings under provisions of the Jobs Act. The repatriation was funded in part by a two-year $40 million term loan and $92 million of Tropical cash.
Our fourth quarter financial statements reflected a federal income tax benefit resulting from the repatriation of $17 million (about 38 cents per share).
The repatriated earnings will be used for qualifying purposes including non-executive compensation and capital projects of our U.S. subsidiaries.
In addition to this one-time tax benefit, certain provisions of the Jobs Act impact income taxes related to the ongoing earnings of foreign subsidiaries of our shipping business. Effective January 1, 2006, we reorganized Tropical’s operations to take advantage of provisions of the Jobs Act providing an opportunity to minimize the federal income tax impact on its ongoing earnings.
Essentially, the reorganization involved the transfer of certain assets and personnel to the offshore subsidiaries. As a result of that reorganization, to the extent shipping earnings are not repatriated to the U.S., such earnings are not subject to current federal taxation. In addition, to the extent such earnings are determined to be indefinitely reinvested offshore, no deferred income tax will be recorded.
17

Financial Update 2006 Financial Outlook The earnings per share estimate provided in our 2005 fourth quarter earnings announcement indicated a range of $2.30 to $2.50 That estimate assumed, among other things, normal weather for the remainder of the year and excluded any impacts associated with the rate order rehearing, fair value accounting adjustments at Nicor Enerchange, the ICC's PBR/PGA review or other contingencies Compared to 2005, excluding the noteworthy items related to the net D&O insurance recoveries and repatriation income tax benefit, reflects lower gas distribution operating results and higher interest; and comparable shipping and higher other energy-related ventures operating results |
Regarding our 2006 outlook, we indicated in our fourth quarter 2005 earnings release and conference call, that our 2006 earnings per share estimate will be in the range of $2.30 to $2.50.
That estimate does not reflect the potential impacts from our rate order rehearing; and additional variability in earnings due to fair value accounting adjustments at Enerchange that could occur because of volatility in the natural gas markets.
That estimate also excluded, among other things, any future impacts associated with the Illinois Commerce Commission’s PBR plan/purchased gas adjustment review and other contingencies (including the ongoing SEC inquiry). While these items could still affect 2006 earnings, they are not currently estimable. That 2006 estimate also assumed normal weather for the remainder of the year.
Compared to 2005, excluding the noteworthy items related to the net D&O insurance recoveries and repatriation income tax benefit, that 2006 earnings estimate assumed –
• Lower operating results at Nicor Gas due to the effects of warmer weather in early 2006, higher operating and maintenance and depreciation costs; partially offset by the full year impact of rate relief;
• Comparable pre-tax operating results at Tropical Shipping due to continuing strong economic conditions, inter-island transshipment opportunities and new construction-related activity throughout its operating region;
• That estimate also included anticipated income tax benefits at Tropical resulting from the reorganization;
• Improved operating results in our other energy-related ventures; and higher interest costs.
As a reminder, we will only provide updates to annual earnings guidance as part of our quarterly and annual earnings releases.
Let me now turn to our regulatory update.
18

Rate Filing September 2005, the ICC approved an increase in Nicor Gas' base rates Order shifts certain revenues and credits between base rates and PGA, thus actual annual net revenue increase is estimated at $35 million November 2005, the ICC granted rehearing on certain issues - decision expected in March 2006 Rehearing outcome could impact annual revenue increase |
Last fall, the Illinois Commerce Commission approved a $54 million increase in Nicor Gas’ base rates.
Because the order shifts certain items between base rates and the PGA rider, we estimate the net annual revenue increase is about $35 million.
Let me stress, prior to the ICC’s order, Nicor Gas had the lowest residential rates of any major natural gas utility in Illinois and among the lowest of any gas utility in the country, and that statement remains true even under the new rates
In November 2005, certain parties, including Nicor Gas, were granted rehearing on certain limited aspects of the final rate order. If a change to the current rate structure is made, the outcome could range from an approximate $7 million reduction to annual net revenues to an approximate $0.9 million increase to annual net revenues.
The ICC is expected to issue its decision on the rehearing this month.
19

2005 Rate Order * (WACC) (Dollars in millions) Granted Return on Equity 10.51% Return on Rate Base* 8.85% Capital Structure Equity 56% Preferred - Debt 44% |
The major terms of the ICC’s order can be seen on this slide.
Among other things, the ICC granted us returns on equity and returns on rate base of 10.51% and 8.85%, respectively. The ICC also granted us our proposed capital structure, consisting of equity, long-term debt and preferred stock.
20

Rate Order - Major Terms Rate Design Changes Net credit to PGA for Chicago Hub revenues Shifting of certain storage-related costs from PGA to base rates 10-Year weather normalization |
The final rate order also included certain rate design changes. Two of the more significant items related to the shifting of certain revenues and credits between base rates and the PGA rider.
Specifically, our Chicago Hub revenue is now credited to the PGA rider and our recovery of certain storage-related costs is now recovered through base rates, instead of the PGA rider.
Regarding the change in treatment of the storage-related costs, this has two impacts. First, such costs will now be reported in operating and maintenances expenses versus cost of gas in the income statement. Also, any variability in such costs, from amounts provided in base rates that arise principally from changes in natural gas prices impacts the company. We had this exposure to volatility before with bad debts and company-use fuel. The rate order just added the storage-related costs aspect.
In addition to these rate design changes, the ICC accepted our request to change from a 30-year average to a 10-year average for calculating normal weather. So, as a reminder, beginning in 2005, Nicor Gas’ normal degree-days were reduced from about 6,000 to 5,830.
That concludes my remarks, let me now turn things back to Russ for a wrap-up.
21

Key Messages Nicor is financially strong Rising costs and high and volatile gas prices are pressuring gas distribution results Strategic locations and assets provide a foundation for revenue opportunities Decisive actions have been taken to rebuild the earnings at our primary business through rate relief and a renewed focus on cost control Non-utility businesses are performing well and all anticipate earnings growth Experienced leadership team Remain focused on customer satisfaction and good corporate citizenship Wrap-Up |
Thanks Rick,
In closing, let me stress that Nicor is afinancially strong company, but, like many others in our industry, we continue to faceearnings challenges.
Operating costs increases, especially those impacted by high and volatile natural gas prices, are negatively impacting results at Nicor Gas.
Despite this environment, we believe thatNicor is positioned for long-term success.
As I mentioned earlier, ourfinancial strength,strategic location and assets provide an excellent foundation for revenue generating activities.
We have also taken an important step towards rebuilding the earnings base at Nicor Gas throughrate relief and a renewed focus to manage controllable operating costs.
In addition, ournon-utility businesses continue toperform solidly – and we will continue togrow these businesses prudently.
Supporting these distinguishing qualities is an experienced management team and dedicated employees who have a passion
for –
| • | | providing quality customer service, |
|
| • | | developing new and profitable service offerings, and |
|
| • | | supporting our efforts to be a good corporate citizen. |
22

Visit our website: www.nicor.com |
Lastly, I thank you for your interest in our company and will now open the floor for questions.
23