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
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
351
Reliance Steel & Aluminium
RS
$15.4B
| $536K | 0.02% |
+7,370
| New | +$536K |
|
352
Cooper Companies
COO
$13.6B
| $534K | 0.02% |
+8,936
| New | +$534K |
|
|
DATA
353
DELISTED
Tableau Software, Inc.
DATA
| $534K | 0.02% |
8,725
-20,426
| -70% | -$1.25M |
|
354
Marriott Vacations Worldwide
VAC
$2.71B
| $533K | 0.02% |
4,533
+4,167
| +1,139% | +$490K |
|
355
United Natural Foods
UNFI
$1.74B
| $530K | 0.02% |
14,457
+12,651
| +700% | +$464K |
|
356
WIX.com
WIX
$9.3B
| $529K | 0.02% |
7,614
-19,718
| -72% | -$1.37M |
|
|
HYGS
357
DELISTED
Hydrogenics Corp
HYGS
| $526K | 0.02% |
52,092
+43,886
| +535% | +$443K |
|
|
CXO
358
DELISTED
CONCHO RESOURCES INC.
CXO
| $524K | 0.02% |
+4,314
| New | +$524K |
|
|
PTLA
359
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $522K | 0.02% |
9,299
-4,356
| -32% | -$245K |
|
360
iShares MSCI Malaysia ETF
EWM
$242M
| $521K | 0.02% |
16,449
+4,904
| +42% | +$155K |
|
361
Westlake Corp
WLK
$11B
| $521K | 0.02% |
+7,875
| New | +$521K |
|
|
SGEN
362
DELISTED
Seagen Inc. Common Stock
SGEN
| $521K | 0.02% |
10,082
+1,379
| +16% | +$71.3K |
|
363
Trex
TREX
$6.43B
| $520K | 0.02% |
+30,776
| New | +$520K |
|
364
Amicus Therapeutics
FOLD
$2.43B
| $519K | 0.02% |
51,578
+21,447
| +71% | +$216K |
|
365
Murphy USA
MUSA
$7.55B
| $519K | 0.02% |
7,012
+6,361
| +977% | +$471K |
|
366
SPDR S&P Metals & Mining ETF
XME
$2.33B
| $519K | 0.02% |
+17,336
| New | +$519K |
|
|
PX
367
DELISTED
Praxair Inc
PX
| $517K | 0.02% |
+3,901
| New | +$517K |
|
368
Mercury Systems
MRCY
$4.12B
| $516K | 0.02% |
12,276
+4,263
| +53% | +$179K |
|
369
Kohl's
KSS
$1.86B
| $513K | 0.02% |
+13,286
| New | +$513K |
|
370
Trinity Industries
TRN
$2.28B
| $513K | 0.02% |
25,434
-1,742
| -6% | -$35.1K |
|
371
BRF SA
BRFS
$5.78B
| $510K | 0.02% |
43,310
+33,971
| +364% | +$400K |
|
372
Cenovus Energy
CVE
$29.3B
| $510K | 0.02% |
69,301
+68,610
| +9,929% | +$505K |
|
|
SOHU
373
Sohu.com
SOHU
$481M
| $508K | 0.02% |
11,295
+10,474
| +1,276% | +$471K |
|
374
ProShares Ultra Bloomberg Crude Oil
UCO
$351M
| $504K | 0.02% |
5,436
+4,056
| +294% | +$376K |
|
375
W.R. Berkley
WRB
$27.4B
| $500K | 0.02% |
24,398
-12,231
| -33% | -$251K |
|