UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
Data Critical Corporation
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NAME OF ISSUER:
Common Stock (Par Value $.001)
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TITLE OF CLASS OF SECURITIES
237622 10 5
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CUSIP NUMBER
June 5, 2000
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(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule
pursuant to which this Schedule is filed:
[ ] Rule 13d-1(b)
[X] Rule 13d-1(c)
[ ] Rule 13d-1(d)
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CUSIP No. 237622 10 5 13G Page 2 of 6 Pages
1. NAMES OF REPORTING PERSONS
Aether Systems, Inc. 52-2186634
2. CHECK THE APPROPRIATE BOX IF A MEMBER
(a) [ ]
(b) [X]
3. SEC USE ONLY
4. CITIZENSHIP OF PLACE OF ORGANIZATION
Delaware
5 SOLE VOTING POWER
1,897,436
NUMBER OF
SHARES 6 SHARED VOTING POWER
BENEFICIALLY
OWNED BY 0
EACH
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 1,897,436
8 SHARED DISPOSITIVE POWER
0
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,897,436
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES*
[ ]
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
16.3%
12. TYPE OF REPORTING PERSON*
CO
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CUSIP No. 237622 10 5 13G Page 3 of 6 Pages
Item l(a). Name of Issuer:
Data Critical Corporation (the "Issuer")
Item 1(b). Address of Issuer's Principal Executive Offices:
The address of the Issuer's principal executive offices is
19820 North Creek Parkway, Suite 100, Bothell Washington 98011
Item 2(a). Name of Person Filing:
This statement is filed on behalf of Aether Systems, Inc.
Item 2(b). Address of Principal Business Office or, if none, Residence:
The principal place of business of Aether Systems, Inc. is
11460 Cronridge Drive, Owings Mills, Maryland 21117.
Item 2(c). Citizenship:
The citizenship or place of organization of each of the Reporting
Persons is set forth on the cover page.
Item 2(d). Title of Class of Securities:
The title of the securities is common stock, par value $.001 per
share (the "Common Stock").
Item 2(e). CUSIP Number:
The CUSIP number of the Common Stock is set forth on the cover
page.
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CUSIP No. 237622 10 5 13G Page 4 of 6 Pages
Item 3. If this statement is filed pursuant to Rules 13d-l(b), or
13d-2(b) or (c), check whether the person filing is a:
(a) [ ] Broker or dealer registered under section 15 of
the Act;
(b) [ ] Bank as defined in section 3(a)(6) of the Act;
(c) [ ] Insurance Company as defined in section 3(a)(19)
of the Act;
(d) [ ] Investment Company registered under section 8 of
the Investment Company Act of 1940;
(e) [ ] An investment adviser in accordance with Rule
13 d- 1 (b)(l)(ii)(E);
(f) [ ] An employee benefit plan, or endowment fund in
accordance with Rule 13d- 1 (b)(I)(ii)(F);
(g) [ ] A parent holding company or control person in
accordance with Rule 13d-1 (b)(1)(ii)(G);
(h) [ ] A savings association as defined in section 3(b)
of the Federal Deposit Insurance Act;
(i) [ ] A church plan that is excluded from the definition
of an investment company under section 3(c)(14) of
the Investment Company Act of 1940;
(j) [ ] Group, in accordance with Rule 13 d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c), check this
box. [X]
Item 4. Ownership.
(a) Amount beneficially owned:
Aether Systems, Inc. 1,897,436
(b) Percent of class:
Aether Systems, Inc. 16.3%
(c) Number of shares as to which such person has:
(i) Sole power to vote or to direct the vote:
Aether directly owns 1,897,436 shares of Common
Stock.
(ii) Shared power to vote or to direct the vote:
0
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CUSIP No. 237622 10 5 13G Page 5 of 6 Pages
(iii) Sole power to dispose or to direct the
disposition of:
Aether directly owns 1,230,770 shares of
Common Stock. Aether also holds an immediately
exercisable option to purchase an additional
666,666 shares of Common Stock within 135 days
of June 5, 2000, or an additional 500,000
shares if the option is exercised more than
135 days after June 5, 2000.
(iv) Shared power to dispose or to direct the
disposition of:
0
Item 5. Ownership of Five Percent or Less of a Class.
Not applicable.
Item 6. Ownership of More than Five Percent on Behalf of Another Person.
Not Applicable
Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on by the Parent Holding
Company.
Not applicable.
Item 8. Identification and Classification of Members of the Group.
Not applicable.
Item 9. Notice of Dissolution of Group.
Not applicable.
Item 10. Certification.
By signing below I certify that, to the best of my knowledge and belief,
the securities referred to above were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in
connection with or as a participant in any transaction having that purpose or
effect.
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CUSIP No. 237622 10 5 13G Page 6 of 6 Pages
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete and
correct.
Dated: June 16, 2000
AETHER SYSTEMS, INC.
By: /s/ David C. Reymann
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Name: David C. Reymann
Title: Secretary
