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 |
Amazon
AMZN
|
+$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$57.4M |
| 4 |
Citigroup
C
|
+$23.4M |
| 5 |
Goldman Sachs
GS
|
+$23M |
Top Sells
| 1 |
Apple
AAPL
|
+$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$42.2M |
| 4 |
Micron Technology
MU
|
+$26.1M |
| 5 |
Adobe
ADBE
|
+$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
CME Group
CME
$94.6B
| $615K | ﹤0.01% |
3,617
-3,810
| -51% | -$648K |
|
402
Walmart
WMT
$816B
| $614K | ﹤0.01% |
19,644
-269,703
| -93% | -$8.43M |
|
403
PENN Entertainment
PENN
$2.93B
| $613K | ﹤0.01% |
+18,651
| New | +$613K |
|
404
Match Group
MTCH
$9.33B
| $612K | ﹤0.01% |
10,578
-24,095
| -69% | -$1.39M |
|
405
Saic
SAIC
$4.72B
| $612K | ﹤0.01% |
+7,604
| New | +$612K |
|
406
Amneal Pharmaceuticals
AMRX
$3.06B
| $608K | ﹤0.01% |
27,405
+297
| +1% | +$6.59K |
|
407
Marsh & McLennan
MMC
$99.2B
| $608K | ﹤0.01% |
7,360
+4,313
| +142% | +$356K |
|
|
GTT
408
DELISTED
GTT Communications, Inc.
GTT
| $605K | ﹤0.01% |
+13,951
| New | +$605K |
|
|
VSI
409
DELISTED
Vitamin Shoppe Inc.
VSI
| $603K | ﹤0.01% |
+60,385
| New | +$603K |
|
410
Caesarstone
CSTE
$48M
| $596K | ﹤0.01% |
32,181
-4,998
| -13% | -$92.6K |
|
411
Citizens Financial Group
CFG
$22.3B
| $593K | ﹤0.01% |
15,385
-14,079
| -48% | -$543K |
|
412
Bread Financial
BFH
$3.06B
| $590K | ﹤0.01% |
3,135
-7,625
| -71% | -$1.44M |
|
413
VF Corp
VFC
$5.95B
| $590K | ﹤0.01% |
6,716
-38,055
| -85% | -$3.34M |
|
414
Canadian Solar
CSIQ
$739M
| $589K | ﹤0.01% |
40,673
-16,027
| -28% | -$232K |
|
415
Golar LNG
GLNG
$4.22B
| $586K | ﹤0.01% |
21,112
-37,512
| -64% | -$1.04M |
|
416
Kimco Realty
KIM
$15.3B
| $585K | ﹤0.01% |
34,953
+21,685
| +163% | +$363K |
|
|
NIHD
417
DELISTED
NII Holdings, Inc. Common Stock
NIHD
| $583K | ﹤0.01% |
99,655
+98,427
| +8,015% | +$576K |
|
418
Invesco CurrencyShares Australian Dollar Trust
FXA
$78.2M
| $581K | ﹤0.01% |
+8,039
| New | +$581K |
|
|
AET
419
DELISTED
Aetna Inc
AET
| $577K | ﹤0.01% |
2,849
-5,202
| -65% | -$1.05M |
|
420
RingCentral
RNG
$2.94B
| $575K | ﹤0.01% |
6,181
+607
| +11% | +$56.5K |
|
|
ONCE
421
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $573K | ﹤0.01% |
+10,506
| New | +$573K |
|
422
McKesson
MCK
$87.8B
| $572K | ﹤0.01% |
4,315
-5,223
| -55% | -$692K |
|
423
Duluth Holdings
DLTH
$145M
| $570K | ﹤0.01% |
18,126
+4,980
| +38% | +$157K |
|
|
ORBK
424
DELISTED
Orbotech Ltd
ORBK
| $570K | ﹤0.01% |
9,592
-2,892
| -23% | -$172K |
|
425
Antero Resources
AR
$9.94B
| $569K | ﹤0.01% |
+32,136
| New | +$569K |
|