Filed: 11/3/2025ACC: 0001019056-25-000228
📋 What this filing means
GAGNON SECURITIES LLC filed this quarterly 13F‑HR report disclosing 86 equity positions with a total reported market value of $498.50M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
86
Positions
$498.50M
Total AUM (reported)
25.21M
Total Shares
Allocation by class
COM$294.24M59.0%
CL A$76.51M15.3%
COM CL A$47.73M9.6%
COM NEW$40.73M8.2%
CLASS A COM$21.96M4.4%
SHS$6.02M1.2%
SPON ADS NEW$5.44M1.1%
Portfolio Concentration
Top 3$99.16M19.9%
4–10$141.85M28.5%
11–25$159.75M32.0%
Rest$97.74M19.6%
Top 3 weight
19.9%
Top 10 weight
48.3%
Voting Authority Distribution
Total shares with voting rights: 25.21M
Sole
Full voting authority
0.00
shares
% of voting shares0.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
25.21M
shares
% of voting shares100.0%
Investment Discretion (by position count)
Sole86
Shared0
Other0
Dominant voting typeNone · 100.0% of voting shares
Institutional Holdings86
Rows:
AIR LEASE CORP
SOLEShares605.62K
TypeSH
Market value$38.55M
7.73%
Sole
0.00
Shared
0.00
None
605.62K
ENSIGN GROUP INC
SOLEShares183.03K
TypeSH
Market value$31.62M
6.34%
Sole
0.00
Shared
0.00
None
183.03K
GENEDX HOLDINGS CORP
SOLEShares269.07K
TypeSH
Market value$28.99M
5.82%
Sole
0.00
Shared
0.00
None
269.07K
AMERESCO INC
SOLEShares859.41K
TypeSH
Market value$28.86M
5.79%
Sole
0.00
Shared
0.00
None
859.41K
CAREDX INC
SOLEShares1.73M
TypeSH
Market value$25.15M
5.04%
Sole
0.00
Shared
0.00
None
1.73M
FRESHWORKS INC
SOLEShares1.87M
TypeSH
Market value$21.96M
4.41%
Sole
0.00
Shared
0.00
None
1.87M
INTUITIVE SURGICAL INC
SOLEShares43.36K
TypeSH
Market value$19.39M
3.89%
Sole
0.00
Shared
0.00
None
43.36K
ENTERPRISE PRODS PARTNERS L P
SOLEShares528.75K
TypeSH
Market value$16.53M
3.32%
Sole
0.00
Shared
0.00
None
528.75K
TREACE MED CONCEPTS INC
SOLEShares2.26M
TypeSH
Market value$15.15M
3.04%
Sole
0.00
Shared
0.00
None
2.26M
BLACKLINE INC
SOLEShares278.92K
TypeSH
Market value$14.81M
2.97%
Sole
0.00
Shared
0.00
None
278.92K
BIOLIFE SOLUTIONS INC
SOLEShares535.76K
TypeSH
Market value$13.67M
2.74%
Sole
0.00
Shared
0.00
None
535.76K
EQUINIX INC
SOLEShares17.25K
TypeSH
Market value$13.51M
2.71%
Sole
0.00
Shared
0.00
None
17.25K
NAVIGATOR HLDGS LTD
SOLEShares865.86K
TypeSH
Market value$13.41M
2.69%
Sole
0.00
Shared
0.00
None
865.86K
GENERAC HLDGS INC
SOLEShares77.56K
TypeSH
Market value$12.98M
2.60%
Sole
0.00
Shared
0.00
None
77.56K
CHEESECAKE FACTORY INC
SOLEShares227.34K
TypeSH
Market value$12.42M
2.49%
Sole
0.00
Shared
0.00
None
227.34K
ASPEN AEROGELS INC
SOLEShares1.75M
TypeSH
Market value$12.21M
2.45%
Sole
0.00
Shared
0.00
None
1.75M
PACIRA BIOSCIENCES INC
SOLEShares449.72K
TypeSH
Market value$11.59M
2.32%
Sole
0.00
Shared
0.00
None
449.72K
CARGURUS INC
SOLEShares272.31K
TypeSH
Market value$10.14M
2.03%
Sole
0.00
Shared
0.00
None
272.31K
CARMAX INC
SOLEShares225.63K
TypeSH
Market value$10.12M
2.03%
Sole
0.00
Shared
0.00
None
225.63K
EXACT SCIENCES CORP
SOLEShares179.44K
TypeSH
Market value$9.82M
1.97%
Sole
0.00
Shared
0.00
None
179.44K
VERTEX INC
SOLEShares378.69K
TypeSH
Market value$9.39M
1.88%
Sole
0.00
Shared
0.00
None
378.69K
PROFOUND MED CORP
SOLEShares1.73M
TypeSH
Market value$8.47M
1.70%
Sole
0.00
Shared
0.00
None
1.73M
DOUBLEVERIFY HLDGS INC
SOLEShares679.92K
TypeSH
Market value$8.15M
1.63%
Sole
0.00
Shared
0.00
None
679.92K
FIVE9 INC
SOLEShares299.40K
TypeSH
Market value$7.25M
1.45%
Sole
0.00
Shared
0.00
None
299.40K
MarineMax Inc
SOLEShares261.35K
TypeSH
Market value$6.62M
1.33%
Sole
0.00
Shared
0.00
None
261.35K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
AIR LEASE CORPSOLE | CL A | 605.62K | SH | $38.55M 7.73% | 0.00 | 0.00 | 605.62K |
ENSIGN GROUP INCSOLE | COM | 183.03K | SH | $31.62M 6.34% | 0.00 | 0.00 | 183.03K |
GENEDX HOLDINGS CORPSOLE | COM CL A | 269.07K | SH | $28.99M 5.82% | 0.00 | 0.00 | 269.07K |
AMERESCO INCSOLE | CL A | 859.41K | SH | $28.86M 5.79% | 0.00 | 0.00 | 859.41K |
CAREDX INCSOLE | COM | 1.73M | SH | $25.15M 5.04% | 0.00 | 0.00 | 1.73M |
FRESHWORKS INCSOLE | CLASS A COM | 1.87M | SH | $21.96M 4.41% | 0.00 | 0.00 | 1.87M |
INTUITIVE SURGICAL INCSOLE | COM NEW | 43.36K | SH | $19.39M 3.89% | 0.00 | 0.00 | 43.36K |
ENTERPRISE PRODS PARTNERS L PSOLE | COM | 528.75K | SH | $16.53M 3.32% | 0.00 | 0.00 | 528.75K |
TREACE MED CONCEPTS INCSOLE | COM | 2.26M | SH | $15.15M 3.04% | 0.00 | 0.00 | 2.26M |
BLACKLINE INCSOLE | COM | 278.92K | SH | $14.81M 2.97% | 0.00 | 0.00 | 278.92K |
BIOLIFE SOLUTIONS INCSOLE | COM NEW | 535.76K | SH | $13.67M 2.74% | 0.00 | 0.00 | 535.76K |
EQUINIX INCSOLE | COM | 17.25K | SH | $13.51M 2.71% | 0.00 | 0.00 | 17.25K |
NAVIGATOR HLDGS LTDSOLE | COM | 865.86K | SH | $13.41M 2.69% | 0.00 | 0.00 | 865.86K |
GENERAC HLDGS INCSOLE | COM | 77.56K | SH | $12.98M 2.60% | 0.00 | 0.00 | 77.56K |
CHEESECAKE FACTORY INCSOLE | COM | 227.34K | SH | $12.42M 2.49% | 0.00 | 0.00 | 227.34K |
ASPEN AEROGELS INCSOLE | COM | 1.75M | SH | $12.21M 2.45% | 0.00 | 0.00 | 1.75M |
PACIRA BIOSCIENCES INCSOLE | COM | 449.72K | SH | $11.59M 2.32% | 0.00 | 0.00 | 449.72K |
CARGURUS INCSOLE | COM CL A | 272.31K | SH | $10.14M 2.03% | 0.00 | 0.00 | 272.31K |
CARMAX INCSOLE | COM | 225.63K | SH | $10.12M 2.03% | 0.00 | 0.00 | 225.63K |
EXACT SCIENCES CORPSOLE | COM | 179.44K | SH | $9.82M 1.97% | 0.00 | 0.00 | 179.44K |
VERTEX INCSOLE | COM | 378.69K | SH | $9.39M 1.88% | 0.00 | 0.00 | 378.69K |
PROFOUND MED CORPSOLE | COM | 1.73M | SH | $8.47M 1.70% | 0.00 | 0.00 | 1.73M |
DOUBLEVERIFY HLDGS INCSOLE | COM | 679.92K | SH | $8.15M 1.63% | 0.00 | 0.00 | 679.92K |
FIVE9 INCSOLE | COM | 299.40K | SH | $7.25M 1.45% | 0.00 | 0.00 | 299.40K |
MarineMax IncSOLE | COM | 261.35K | SH | $6.62M 1.33% | 0.00 | 0.00 | 261.35K |
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