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 | |
|---|---|---|---|---|---|---|
326
Credit Acceptance
CACC
$5.87B
| $606K | ﹤0.01% |
1,590
+1,121
| +239% | +$427K |
|
327
The Mosaic Company
MOS
$10.3B
| $602K | ﹤0.01% |
+20,618
| New | +$602K |
|
328
Vulcan Materials
VMC
$39B
| $600K | ﹤0.01% |
6,074
+2,435
| +67% | +$241K |
|
|
VIAB
329
DELISTED
Viacom Inc. Class B
VIAB
| $596K | ﹤0.01% |
+23,220
| New | +$596K |
|
|
SBNY
330
DELISTED
Signature Bank
SBNY
| $589K | ﹤0.01% |
+5,738
| New | +$589K |
|
331
Cummins
CMI
$55.1B
| $585K | ﹤0.01% |
+4,381
| New | +$585K |
|
332
SPDR S&P Oil & Gas Equipment & Services ETF
XES
$155M
| $581K | ﹤0.01% |
6,458
+5,786
| +861% | +$521K |
|
333
iShares MSCI Spain ETF
EWP
$1.36B
| $580K | ﹤0.01% |
21,640
+20,468
| +1,746% | +$549K |
|
334
Waste Connections
WCN
$46.1B
| $579K | ﹤0.01% |
+7,807
| New | +$579K |
|
335
Stifel
SF
$11.5B
| $575K | ﹤0.01% |
+20,844
| New | +$575K |
|
336
Hartford Financial Services
HIG
$37B
| $573K | ﹤0.01% |
12,905
+10,721
| +491% | +$476K |
|
337
Qualcomm
QCOM
$172B
| $573K | ﹤0.01% |
10,084
+9,884
| +4,942% | +$562K |
|
338
Century Communities
CCS
$2.07B
| $570K | ﹤0.01% |
33,045
+32,482
| +5,769% | +$560K |
|
339
NMI Holdings
NMIH
$3.1B
| $564K | ﹤0.01% |
31,630
+30,120
| +1,995% | +$537K |
|
|
BPL
340
DELISTED
Buckeye Partners, L.P.
BPL
| $559K | ﹤0.01% |
19,302
+18,033
| +1,421% | +$522K |
|
|
CEO
341
DELISTED
CNOOC Limited
CEO
| $557K | ﹤0.01% |
3,658
-4,396
| -55% | -$669K |
|
342
Acadia Pharmaceuticals
ACAD
$4.26B
| $555K | ﹤0.01% |
34,376
-697
| -2% | -$11.3K |
|
343
Brinker International
EAT
$7.04B
| $555K | ﹤0.01% |
+12,631
| New | +$555K |
|
344
Canadian Pacific Kansas City
CP
$70.3B
| $554K | ﹤0.01% |
15,615
+265
| +2% | +$9.4K |
|
345
Okta
OKTA
$16.1B
| $554K | ﹤0.01% |
8,687
-14,211
| -62% | -$906K |
|
346
Nutrien
NTR
$27.4B
| $552K | ﹤0.01% |
+11,746
| New | +$552K |
|
347
SandRidge Energy
SD
$420M
| $546K | ﹤0.01% |
71,869
+45,217
| +170% | +$344K |
|
348
OSI Systems
OSIS
$3.93B
| $541K | ﹤0.01% |
7,384
+5,976
| +424% | +$438K |
|
349
Invesco Solar ETF
TAN
$765M
| $538K | ﹤0.01% |
+29,039
| New | +$538K |
|
350
Star Bulk Carriers
SBLK
$2.21B
| $534K | ﹤0.01% |
58,490
+4,883
| +9% | +$44.6K |
|