Filed: 8/5/2026ACC: 0001019056-26-000123
📋 What this filing means
GAGNON SECURITIES LLC filed this quarterly 13F‑HR report disclosing 85 equity positions with a total reported market value of $518.83M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
85
Positions
$518.83M
Total AUM (reported)
27.90M
Total Shares
Allocation by class
COM$326.18M62.9%
COM CL A$56.90M11.0%
COM NEW$53.97M10.4%
CL A$49.17M9.5%
CLASS A COM$15.83M3.1%
SPON ADS NEW$9.48M1.8%
SPONSORED ADS$1.23M0.2%
Portfolio Concentration
Top 3$114.38M22.0%
4–10$133.33M25.7%
11–25$184.17M35.5%
Rest$86.95M16.8%
Top 3 weight
22.0%
Top 10 weight
47.7%
Voting Authority Distribution
Total shares with voting rights: 27.90M
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
27.90M
shares
% of voting shares100.0%
Investment Discretion (by position count)
Sole85
Shared0
Other0
Dominant voting typeNone · 100.0% of voting shares
Institutional Holdings85
Rows:
CAREDX INC
SOLEShares1.77M
TypeSH
Market value$50.47M
9.73%
Sole
0.00
Shared
0.00
None
1.77M
GENEDX HOLDINGS CORP
SOLEShares524.87K
TypeSH
Market value$36.03M
6.94%
Sole
0.00
Shared
0.00
None
524.87K
ENSIGN GROUP INC
SOLEShares173.91K
TypeSH
Market value$27.88M
5.37%
Sole
0.00
Shared
0.00
None
173.91K
AMERESCO INC
SOLEShares826.56K
TypeSH
Market value$22.81M
4.40%
Sole
0.00
Shared
0.00
None
826.56K
GENERAC HLDGS INC
SOLEShares73.17K
TypeSH
Market value$21.42M
4.13%
Sole
0.00
Shared
0.00
None
73.17K
ENTERPRISE PRODS PARTNERS L P
SOLEShares510.58K
TypeSH
Market value$18.77M
3.62%
Sole
0.00
Shared
0.00
None
510.58K
QUIDELORTHO CORP
SOLEShares1.03M
TypeSH
Market value$18.05M
3.48%
Sole
0.00
Shared
0.00
None
1.03M
CHEESECAKE FACTORY INC
SOLEShares221.79K
TypeSH
Market value$17.64M
3.40%
Sole
0.00
Shared
0.00
None
221.79K
EQUINIX INC
SOLEShares16.72K
TypeSH
Market value$17.43M
3.36%
Sole
0.00
Shared
0.00
None
16.72K
CARMAX INC
SOLEShares325.41K
TypeSH
Market value$17.21M
3.32%
Sole
0.00
Shared
0.00
None
325.41K
FRESHWORKS INC
SOLEShares1.56M
TypeSH
Market value$15.83M
3.05%
Sole
0.00
Shared
0.00
None
1.56M
PACIRA BIOSCIENCES INC
SOLEShares608.62K
TypeSH
Market value$15.44M
2.98%
Sole
0.00
Shared
0.00
None
608.62K
FIVE9 INC
SOLEShares722.70K
TypeSH
Market value$15.41M
2.97%
Sole
0.00
Shared
0.00
None
722.70K
HINGE HEALTH INC
SOLEShares182.96K
TypeSH
Market value$15.19M
2.93%
Sole
0.00
Shared
0.00
None
182.96K
BIOLIFE SOLUTIONS INC
SOLEShares535.91K
TypeSH
Market value$15.13M
2.92%
Sole
0.00
Shared
0.00
None
535.91K
PROFOUND MED CORP
SOLEShares1.96M
TypeSH
Market value$13.03M
2.51%
Sole
0.00
Shared
0.00
None
1.96M
CARGURUS INC
SOLEShares367.07K
TypeSH
Market value$12.51M
2.41%
Sole
0.00
Shared
0.00
None
367.07K
TREACE MED CONCEPTS INC
SOLEShares3.03M
TypeSH
Market value$12.06M
2.32%
Sole
0.00
Shared
0.00
None
3.03M
INTUITIVE SURGICAL INC
SOLEShares29.14K
TypeSH
Market value$11.59M
2.23%
Sole
0.00
Shared
0.00
None
29.14K
NAVIGATOR HLDGS LTD
SOLEShares612.30K
TypeSH
Market value$11.41M
2.20%
Sole
0.00
Shared
0.00
None
612.30K
BLACKLINE INC
SOLEShares375.77K
TypeSH
Market value$10.55M
2.03%
Sole
0.00
Shared
0.00
None
375.77K
ASPEN AEROGELS INC
SOLEShares1.54M
TypeSH
Market value$9.74M
1.88%
Sole
0.00
Shared
0.00
None
1.54M
PROTO LABS INC
SOLEShares116.28K
TypeSH
Market value$9.48M
1.83%
Sole
0.00
Shared
0.00
None
116.28K
VERTEX INC
SOLEShares761.03K
TypeSH
Market value$8.74M
1.68%
Sole
0.00
Shared
0.00
None
761.03K
AMPLITUDE INC
SOLEShares1.06M
TypeSH
Market value$8.07M
1.56%
Sole
0.00
Shared
0.00
None
1.06M
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
CAREDX INCSOLE | COM | 1.77M | SH | $50.47M 9.73% | 0.00 | 0.00 | 1.77M |
GENEDX HOLDINGS CORPSOLE | COM CL A | 524.87K | SH | $36.03M 6.94% | 0.00 | 0.00 | 524.87K |
ENSIGN GROUP INCSOLE | COM | 173.91K | SH | $27.88M 5.37% | 0.00 | 0.00 | 173.91K |
AMERESCO INCSOLE | CL A | 826.56K | SH | $22.81M 4.40% | 0.00 | 0.00 | 826.56K |
GENERAC HLDGS INCSOLE | COM | 73.17K | SH | $21.42M 4.13% | 0.00 | 0.00 | 73.17K |
ENTERPRISE PRODS PARTNERS L PSOLE | COM | 510.58K | SH | $18.77M 3.62% | 0.00 | 0.00 | 510.58K |
QUIDELORTHO CORPSOLE | COM NEW | 1.03M | SH | $18.05M 3.48% | 0.00 | 0.00 | 1.03M |
CHEESECAKE FACTORY INCSOLE | COM | 221.79K | SH | $17.64M 3.40% | 0.00 | 0.00 | 221.79K |
EQUINIX INCSOLE | COM | 16.72K | SH | $17.43M 3.36% | 0.00 | 0.00 | 16.72K |
CARMAX INCSOLE | COM | 325.41K | SH | $17.21M 3.32% | 0.00 | 0.00 | 325.41K |
FRESHWORKS INCSOLE | CLASS A COM | 1.56M | SH | $15.83M 3.05% | 0.00 | 0.00 | 1.56M |
PACIRA BIOSCIENCES INCSOLE | COM | 608.62K | SH | $15.44M 2.98% | 0.00 | 0.00 | 608.62K |
FIVE9 INCSOLE | COM | 722.70K | SH | $15.41M 2.97% | 0.00 | 0.00 | 722.70K |
HINGE HEALTH INCSOLE | CL A | 182.96K | SH | $15.19M 2.93% | 0.00 | 0.00 | 182.96K |
BIOLIFE SOLUTIONS INCSOLE | COM NEW | 535.91K | SH | $15.13M 2.92% | 0.00 | 0.00 | 535.91K |
PROFOUND MED CORPSOLE | COM | 1.96M | SH | $13.03M 2.51% | 0.00 | 0.00 | 1.96M |
CARGURUS INCSOLE | COM CL A | 367.07K | SH | $12.51M 2.41% | 0.00 | 0.00 | 367.07K |
TREACE MED CONCEPTS INCSOLE | COM | 3.03M | SH | $12.06M 2.32% | 0.00 | 0.00 | 3.03M |
INTUITIVE SURGICAL INCSOLE | COM NEW | 29.14K | SH | $11.59M 2.23% | 0.00 | 0.00 | 29.14K |
NAVIGATOR HLDGS LTDSOLE | COM | 612.30K | SH | $11.41M 2.20% | 0.00 | 0.00 | 612.30K |
BLACKLINE INCSOLE | COM | 375.77K | SH | $10.55M 2.03% | 0.00 | 0.00 | 375.77K |
ASPEN AEROGELS INCSOLE | COM | 1.54M | SH | $9.74M 1.88% | 0.00 | 0.00 | 1.54M |
PROTO LABS INCSOLE | SPON ADS NEW | 116.28K | SH | $9.48M 1.83% | 0.00 | 0.00 | 116.28K |
VERTEX INCSOLE | CL A | 761.03K | SH | $8.74M 1.68% | 0.00 | 0.00 | 761.03K |
AMPLITUDE INCSOLE | COM CL A | 1.06M | SH | $8.07M 1.56% | 0.00 | 0.00 | 1.06M |
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