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 |
Boeing
BA
|
$49.5M |
| 2 |
Pinduoduo
PDD
|
$45.3M |
| 3 |
Microsoft
MSFT
|
$42.5M |
| 4 |
Apple
AAPL
|
$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
$95.4M |
| 2 |
Citigroup
C
|
$57.9M |
| 3 |
Pfizer
PFE
|
$55.9M |
| 4 |
TSMC
TSM
|
$40.4M |
| 5 |
Starbucks
SBUX
|
$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GTM
301
ZoomInfo Technologies
GTM
$3.26B
| $1.79M | ﹤0.01% |
173,881
-238,580
| -58% | -$2.46M |
|
302
DexCom
DXCM
$31.6B
| $1.79M | ﹤0.01% |
26,729
+4,980
| +23% | +$334K |
|
303
CorMedix
CRMD
$926M
| $1.79M | ﹤0.01% |
221,317
+140,170
| +173% | +$1.13M |
|
304
GitLab
GTLB
$7.63B
| $1.77M | ﹤0.01% |
34,383
+11,039
| +47% | +$569K |
|
305
Abercrombie & Fitch
ANF
$4.49B
| $1.76M | ﹤0.01% |
+12,607
| New | +$1.76M |
|
306
Organon & Co
OGN
$2.7B
| $1.76M | ﹤0.01% |
92,147
+20,561
| +29% | +$393K |
|
307
Trip.com Group
TCOM
$47.6B
| $1.74M | ﹤0.01% |
29,259
+28,514
| +3,827% | +$1.69M |
|
308
Expedia Group
EXPE
$26.6B
| $1.72M | ﹤0.01% |
11,611
-33,464
| -74% | -$4.95M |
|
309
KBR
KBR
$6.4B
| $1.71M | ﹤0.01% |
26,246
+18,429
| +236% | +$1.2M |
|
310
Aurinia Pharmaceuticals
AUPH
$1.63B
| $1.7M | ﹤0.01% |
231,267
+176,546
| +323% | +$1.29M |
|
311
Yeti Holdings
YETI
$2.95B
| $1.69M | ﹤0.01% |
+41,182
| New | +$1.69M |
|
312
Dropbox
DBX
$8.06B
| $1.68M | ﹤0.01% |
+65,944
| New | +$1.68M |
|
313
Masimo
MASI
$8B
| $1.67M | ﹤0.01% |
12,529
+6,169
| +97% | +$822K |
|
314
ProShares Ultra QQQ
QLD
$9.07B
| $1.66M | ﹤0.01% |
16,497
+7,773
| +89% | +$783K |
|
315
Direxion Daily S&P 500 Bear 3x Shares
SPXS
$443M
| $1.66M | ﹤0.01% |
249,917
-62,554
| -20% | -$416K |
|
316
Ardelyx
ARDX
$1.57B
| $1.65M | ﹤0.01% |
240,199
-72,798
| -23% | -$501K |
|
317
Shake Shack
SHAK
$4.03B
| $1.65M | ﹤0.01% |
16,006
+4,971
| +45% | +$513K |
|
318
Hubbell
HUBB
$23.2B
| $1.64M | ﹤0.01% |
3,828
-5,533
| -59% | -$2.37M |
|
319
Intellia Therapeutics
NTLA
$1.29B
| $1.62M | ﹤0.01% |
78,994
+38,206
| +94% | +$785K |
|
320
Bausch Health
BHC
$2.72B
| $1.62M | ﹤0.01% |
198,594
+11,514
| +6% | +$93.9K |
|
321
iRhythm Technologies
IRTC
$5.82B
| $1.62M | ﹤0.01% |
21,805
+20,022
| +1,123% | +$1.49M |
|
322
TJX Companies
TJX
$155B
| $1.61M | ﹤0.01% |
13,704
-16,742
| -55% | -$1.97M |
|
323
Sprott Uranium Miners ETF
URNM
$1.68B
| $1.6M | ﹤0.01% |
34,973
+32,214
| +1,168% | +$1.48M |
|
324
Nextracker
NXT
$10.4B
| $1.59M | ﹤0.01% |
42,474
+20,985
| +98% | +$786K |
|
325
Opendoor
OPEN
$4.89B
| $1.59M | ﹤0.01% |
795,741
+28,914
| +4% | +$57.8K |
|