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 |
Alphabet (Google) Class C
GOOG
|
$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$40.9M |
| 4 |
Apple
AAPL
|
$16.5M |
| 5 |
Visa
V
|
$12M |
Top Sells
| 1 |
Amazon
AMZN
|
$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
$33.4M |
| 4 |
Goldman Sachs
GS
|
$30.2M |
| 5 |
Boeing
BA
|
$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
226
SPDR S&P Metals & Mining ETF
XME
$2.35B
| $978K | ﹤0.01% |
+37,350
| New | +$978K |
|
227
ProShares UltraShort S&P500
SDS
$442M
| $975K | ﹤0.01% |
4,546
-3,134
| -41% | -$672K |
|
228
General Mills
GIS
$27B
| $963K | ﹤0.01% |
24,743
-25,173
| -50% | -$980K |
|
229
W.W. Grainger
GWW
$47.5B
| $963K | ﹤0.01% |
+3,414
| New | +$963K |
|
|
AMRN
230
Amarin Corp
AMRN
$311M
| $961K | ﹤0.01% |
3,532
-7,102
| -67% | -$1.93M |
|
231
Direxion Daily 20+ Year Treasury Bear 3X Shares
TMV
$166M
| $958K | ﹤0.01% |
21,038
+19,254
| +1,079% | +$877K |
|
232
SPDR Bloomberg High Yield Bond ETF
JNK
$8.1B
| $957K | ﹤0.01% |
9,501
+8,960
| +1,656% | +$903K |
|
233
RLJ Lodging Trust
RLJ
$1.18B
| $946K | ﹤0.01% |
57,709
+54,715
| +1,827% | +$897K |
|
|
PTR
234
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $945K | ﹤0.01% |
15,356
+13,801
| +888% | +$849K |
|
|
SHPG
235
DELISTED
Shire pic
SHPG
| $943K | ﹤0.01% |
+5,420
| New | +$943K |
|
|
EGRX
236
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $940K | ﹤0.01% |
23,341
+20,966
| +883% | +$844K |
|
|
AGN
237
DELISTED
Allergan plc
AGN
| $940K | ﹤0.01% |
7,040
+5,087
| +260% | +$679K |
|
238
Ascendis Pharma
ASND
$12.5B
| $939K | ﹤0.01% |
+14,993
| New | +$939K |
|
239
Hologic
HOLX
$14.8B
| $938K | ﹤0.01% |
22,844
+18,674
| +448% | +$767K |
|
240
Wolfspeed
WOLF
$196M
| $936K | ﹤0.01% |
21,885
-25,523
| -54% | -$1.09M |
|
241
Energy Transfer Partners
ET
$59.7B
| $926K | ﹤0.01% |
70,112
+47,902
| +216% | +$633K |
|
|
GRUB
242
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $917K | ﹤0.01% |
5,975
-3,034
| -34% | -$466K |
|
243
Zions Bancorporation
ZION
$8.34B
| $914K | ﹤0.01% |
22,444
-19,596
| -47% | -$798K |
|
244
Virtu Financial
VIRT
$3.29B
| $900K | ﹤0.01% |
34,969
+30,676
| +715% | +$790K |
|
245
Floor & Decor
FND
$9.42B
| $899K | ﹤0.01% |
+34,749
| New | +$899K |
|
246
NextEra Energy, Inc.
NEE
$146B
| $898K | ﹤0.01% |
+20,688
| New | +$898K |
|
247
Cencora
COR
$56.7B
| $896K | ﹤0.01% |
+12,054
| New | +$896K |
|
248
Tronox
TROX
$710M
| $892K | ﹤0.01% |
114,715
+88,541
| +338% | +$688K |
|
249
Light & Wonder
LNW
$7.48B
| $881K | ﹤0.01% |
49,287
+49,086
| +24,421% | +$877K |
|
250
Under Armour Class C
UA
$2.13B
| $879K | ﹤0.01% |
54,367
+30,531
| +128% | +$494K |
|