Filed: 4/22/2026ACC: 0001019056-26-000076
📋 What this filing means
GAGNON SECURITIES LLC filed this quarterly 13F‑HR report disclosing 85 equity positions with a total reported market value of $433.21M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
85
Positions
$433.21M
Total AUM (reported)
29.56M
Total Shares
Allocation by class
COM$288.11M66.5%
COM CL A$36.18M8.4%
COM NEW$36.01M8.3%
CL A$33.57M7.7%
CLASS A COM$13.90M3.2%
0-3 MNTH TREASRY$9.33M2.2%
SPON ADS NEW$6.32M1.5%
Portfolio Concentration
Top 3$88.21M20.4%
4–10$115.85M26.7%
11–25$140.52M32.4%
Rest$88.63M20.5%
Top 3 weight
20.4%
Top 10 weight
47.1%
Voting Authority Distribution
Total shares with voting rights: 29.56M
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
29.56M
shares
% of voting shares100.0%
Investment Discretion (by position count)
Sole85
Shared0
Other0
Dominant voting typeNone · 100.0% of voting shares
Institutional Holdings85
Rows:
ENSIGN GROUP INC
SOLEShares179.67K
TypeSH
Market value$36.20M
8.36%
Sole
0.00
Shared
0.00
None
179.67K
CAREDX INC
SOLEShares1.76M
TypeSH
Market value$30.59M
7.06%
Sole
0.00
Shared
0.00
None
1.76M
AMERESCO INC
SOLEShares840.06K
TypeSH
Market value$21.42M
4.94%
Sole
0.00
Shared
0.00
None
840.06K
GENEDX HOLDINGS CORP
SOLEShares303.15K
TypeSH
Market value$19.47M
4.49%
Sole
0.00
Shared
0.00
None
303.15K
ENTERPRISE PRODS PARTNERS L P
SOLEShares514.26K
TypeSH
Market value$19.46M
4.49%
Sole
0.00
Shared
0.00
None
514.26K
NAVIGATOR HLDGS LTD
SOLEShares886.63K
TypeSH
Market value$17.14M
3.96%
Sole
0.00
Shared
0.00
None
886.63K
EQUINIX INC
SOLEShares16.95K
TypeSH
Market value$16.62M
3.84%
Sole
0.00
Shared
0.00
None
16.95K
GENERAC HLDGS INC
SOLEShares74.91K
TypeSH
Market value$14.63M
3.38%
Sole
0.00
Shared
0.00
None
74.91K
INTUITIVE SURGICAL INC
SOLEShares31.62K
TypeSH
Market value$14.58M
3.36%
Sole
0.00
Shared
0.00
None
31.62K
PACIRA BIOSCIENCES INC
SOLEShares617.51K
TypeSH
Market value$13.96M
3.22%
Sole
0.00
Shared
0.00
None
617.51K
FRESHWORKS INC
SOLEShares1.73M
TypeSH
Market value$13.90M
3.21%
Sole
0.00
Shared
0.00
None
1.73M
CARMAX INC
SOLEShares309.70K
TypeSH
Market value$12.88M
2.97%
Sole
0.00
Shared
0.00
None
309.70K
PROFOUND MED CORP
SOLEShares1.94M
TypeSH
Market value$12.60M
2.91%
Sole
0.00
Shared
0.00
None
1.94M
CHEESECAKE FACTORY INC
SOLEShares225.05K
TypeSH
Market value$12.32M
2.84%
Sole
0.00
Shared
0.00
None
225.05K
BLACKLINE INC
SOLEShares296.42K
TypeSH
Market value$10.97M
2.53%
Sole
0.00
Shared
0.00
None
296.42K
BIOLIFE SOLUTIONS INC
SOLEShares536.51K
TypeSH
Market value$10.24M
2.36%
Sole
0.00
Shared
0.00
None
536.51K
FIVE9 INC
SOLEShares622.06K
TypeSH
Market value$9.44M
2.18%
Sole
0.00
Shared
0.00
None
622.06K
ISHARES TR
SOLEShares92.70K
TypeSH
Market value$9.33M
2.15%
Sole
0.00
Shared
0.00
None
92.70K
CARGURUS INC
SOLEShares271.52K
TypeSH
Market value$9.25M
2.13%
Sole
0.00
Shared
0.00
None
271.52K
AMPLITUDE INC
SOLEShares1.06M
TypeSH
Market value$7.23M
1.67%
Sole
0.00
Shared
0.00
None
1.06M
TREACE MED CONCEPTS INC
SOLEShares5.20M
TypeSH
Market value$6.97M
1.61%
Sole
0.00
Shared
0.00
None
5.20M
QUIDELORTHO CORP
SOLEShares403.32K
TypeSH
Market value$6.63M
1.53%
Sole
0.00
Shared
0.00
None
403.32K
ASPEN AEROGELS INC
SOLEShares1.86M
TypeSH
Market value$6.37M
1.47%
Sole
0.00
Shared
0.00
None
1.86M
PROTO LABS INC
SOLEShares110.89K
TypeSH
Market value$6.32M
1.46%
Sole
0.00
Shared
0.00
None
110.89K
CELCUITY INC
SOLEShares53.34K
TypeSH
Market value$6.09M
1.41%
Sole
0.00
Shared
0.00
None
53.34K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
ENSIGN GROUP INCSOLE | COM | 179.67K | SH | $36.20M 8.36% | 0.00 | 0.00 | 179.67K |
CAREDX INCSOLE | COM | 1.76M | SH | $30.59M 7.06% | 0.00 | 0.00 | 1.76M |
AMERESCO INCSOLE | CL A | 840.06K | SH | $21.42M 4.94% | 0.00 | 0.00 | 840.06K |
GENEDX HOLDINGS CORPSOLE | COM CL A | 303.15K | SH | $19.47M 4.49% | 0.00 | 0.00 | 303.15K |
ENTERPRISE PRODS PARTNERS L PSOLE | COM | 514.26K | SH | $19.46M 4.49% | 0.00 | 0.00 | 514.26K |
NAVIGATOR HLDGS LTDSOLE | COM | 886.63K | SH | $17.14M 3.96% | 0.00 | 0.00 | 886.63K |
EQUINIX INCSOLE | COM | 16.95K | SH | $16.62M 3.84% | 0.00 | 0.00 | 16.95K |
GENERAC HLDGS INCSOLE | COM | 74.91K | SH | $14.63M 3.38% | 0.00 | 0.00 | 74.91K |
INTUITIVE SURGICAL INCSOLE | COM NEW | 31.62K | SH | $14.58M 3.36% | 0.00 | 0.00 | 31.62K |
PACIRA BIOSCIENCES INCSOLE | COM | 617.51K | SH | $13.96M 3.22% | 0.00 | 0.00 | 617.51K |
FRESHWORKS INCSOLE | CLASS A COM | 1.73M | SH | $13.90M 3.21% | 0.00 | 0.00 | 1.73M |
CARMAX INCSOLE | COM | 309.70K | SH | $12.88M 2.97% | 0.00 | 0.00 | 309.70K |
PROFOUND MED CORPSOLE | COM | 1.94M | SH | $12.60M 2.91% | 0.00 | 0.00 | 1.94M |
CHEESECAKE FACTORY INCSOLE | COM | 225.05K | SH | $12.32M 2.84% | 0.00 | 0.00 | 225.05K |
BLACKLINE INCSOLE | COM | 296.42K | SH | $10.97M 2.53% | 0.00 | 0.00 | 296.42K |
BIOLIFE SOLUTIONS INCSOLE | COM NEW | 536.51K | SH | $10.24M 2.36% | 0.00 | 0.00 | 536.51K |
FIVE9 INCSOLE | COM | 622.06K | SH | $9.44M 2.18% | 0.00 | 0.00 | 622.06K |
ISHARES TRSOLE | 0-3 MNTH TREASRY | 92.70K | SH | $9.33M 2.15% | 0.00 | 0.00 | 92.70K |
CARGURUS INCSOLE | COM CL A | 271.52K | SH | $9.25M 2.13% | 0.00 | 0.00 | 271.52K |
AMPLITUDE INCSOLE | COM CL A | 1.06M | SH | $7.23M 1.67% | 0.00 | 0.00 | 1.06M |
TREACE MED CONCEPTS INCSOLE | COM | 5.20M | SH | $6.97M 1.61% | 0.00 | 0.00 | 5.20M |
QUIDELORTHO CORPSOLE | COM NEW | 403.32K | SH | $6.63M 1.53% | 0.00 | 0.00 | 403.32K |
ASPEN AEROGELS INCSOLE | COM | 1.86M | SH | $6.37M 1.47% | 0.00 | 0.00 | 1.86M |
PROTO LABS INCSOLE | SPON ADS NEW | 110.89K | SH | $6.32M 1.46% | 0.00 | 0.00 | 110.89K |
CELCUITY INCSOLE | COM | 53.34K | SH | $6.09M 1.41% | 0.00 | 0.00 | 53.34K |
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