Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 | +$216M | |
| 2 | +$159M | |
| 3 | +$128M | |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 | +$141M | |
| 2 | +$53.1M | |
| 3 | +$45.7M | |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
AutoZone
AZO
$64.2B
| $1.36M | ﹤0.01% |
+366
|
|
||
327
Nuvalent
NUVL
$6.89B
| $1.35M | ﹤0.01% |
+17,730
|
|
||
328
abrdn Physical Palladium Shares ETF
PALL
$684M
| $1.35M | ﹤0.01% |
13,421
+10,509
|
|
||
329
Antero Resources
AR
$10.7B
| $1.35M | ﹤0.01% |
+33,426
|
|
||
330
LifeMD
LFMD
$225M
| $1.35M | ﹤0.01% |
+98,884
|
|
||
331
Ferrari
RACE
$74.5B
| $1.34M | ﹤0.01% |
+2,733
|
|
||
332
OneMain Financial
OMF
$7.07B
| $1.33M | ﹤0.01% |
23,408
-21,722
|
|
||
333
Symbotic
SYM
$6.54B
| $1.33M | ﹤0.01% |
34,245
+9,617
|
|
||
334
Genius Sports
GENI
$2.4B
| $1.32M | ﹤0.01% |
127,438
+59,177
|
|
||
|
GTM
335
ZoomInfo Technologies
GTM
$3.24B
| $1.32M | ﹤0.01% |
130,993
-73,629
|
|
||
336
Warby Parker
WRBY
$2.11B
| $1.32M | ﹤0.01% |
+60,289
|
|
||
337
Western Midstream Partners
WES
$15.8B
| $1.3M | ﹤0.01% |
33,680
+9,323
|
|
||
|
GRNY
338
FundStrat Granny Shots US Large Cap ETF
GRNY
$2.81B
| $1.3M | ﹤0.01% |
57,285
+38,078
|
|
||
339
Rumble
RUM
$1.99B
| $1.29M | ﹤0.01% |
143,531
+44,607
|
|
||
340
Becton Dickinson
BDX
$55.7B
| $1.28M | ﹤0.01% |
7,456
-2,638
|
|
||
341
Roku
ROKU
$14.8B
| $1.28M | ﹤0.01% |
14,569
-28,284
|
|
||
342
Magnite
MGNI
$2.02B
| $1.27M | ﹤0.01% |
+52,834
|
|
||
343
United Natural Foods
UNFI
$2.4B
| $1.27M | ﹤0.01% |
+54,526
|
|
||
344
Banc of California
BANC
$2.66B
| $1.27M | ﹤0.01% |
90,416
-92,639
|
|
||
345
Badger Meter
BMI
$5.45B
| $1.27M | ﹤0.01% |
5,169
+4,808
|
|
||
|
LINE
346
Lineage Inc
LINE
$7.69B
| $1.26M | ﹤0.01% |
29,089
+24,373
|
|
||
347
Lemonade
LMND
$5.26B
| $1.26M | ﹤0.01% |
28,824
-7,945
|
|
||
348
BWX Technologies
BWXT
$16.6B
| $1.26M | ﹤0.01% |
8,749
-10,774
|
|
||
349
Goodyear
GT
$2.2B
| $1.26M | ﹤0.01% |
121,152
-55,523
|
|
||
350
Ovintiv
OVV
$9.95B
| $1.25M | ﹤0.01% |
32,906
+11,171
|
|