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 | |
|---|---|---|---|---|---|---|
|
CY
251
DELISTED
Cypress Semiconductor
CY
| $847K | 0.04% |
62,090
+33,722
| +119% | +$460K |
|
|
ALXN
252
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $844K | 0.04% |
6,937
-10,991
| -61% | -$1.34M |
|
253
Terex
TEX
$3.47B
| $837K | 0.04% |
22,342
+10,232
| +84% | +$383K |
|
254
iShares Silver Trust
SLV
$20.1B
| $833K | 0.04% |
+53,055
| New | +$833K |
|
255
Tenet Healthcare
THC
$17.3B
| $833K | 0.04% |
43,122
-8,226
| -16% | -$159K |
|
256
LendingTree
TREE
$978M
| $833K | 0.04% |
4,843
+3,767
| +350% | +$648K |
|
|
COHR
257
DELISTED
Coherent Inc
COHR
| $832K | 0.04% |
+3,700
| New | +$832K |
|
258
Hyatt Hotels
H
$13.8B
| $828K | 0.04% |
+14,742
| New | +$828K |
|
259
Fluor
FLR
$6.72B
| $826K | 0.04% |
+18,046
| New | +$826K |
|
260
Cadence Design Systems
CDNS
$95.6B
| $817K | 0.04% |
+24,416
| New | +$817K |
|
261
Sherwin-Williams
SHW
$92.9B
| $815K | 0.04% |
6,975
+444
| +7% | +$51.9K |
|
|
TIME
262
DELISTED
Time Inc.
TIME
| $809K | 0.04% |
56,407
+33,028
| +141% | +$474K |
|
263
Heron Therapeutics
HRTX
$201M
| $806K | 0.04% |
+58,262
| New | +$806K |
|
264
NOV
NOV
$4.95B
| $806K | 0.04% |
24,474
+3,769
| +18% | +$124K |
|
265
Under Armour Class C
UA
$2.13B
| $789K | 0.03% |
39,152
-18,219
| -32% | -$367K |
|
266
Conduent
CNDT
$447M
| $787K | 0.03% |
49,397
+48,406
| +4,885% | +$771K |
|
267
Spectrum Brands
SPB
$1.38B
| $787K | 0.03% |
6,301
+5,196
| +470% | +$649K |
|
268
Helmerich & Payne
HP
$2.01B
| $784K | 0.03% |
14,440
-6,950
| -32% | -$377K |
|
269
Signet Jewelers
SIG
$3.85B
| $780K | 0.03% |
12,334
-44,450
| -78% | -$2.81M |
|
270
Urban Outfitters
URBN
$6.35B
| $777K | 0.03% |
41,956
-21,128
| -33% | -$391K |
|
|
NFX
271
DELISTED
Newfield Exploration
NFX
| $775K | 0.03% |
+27,256
| New | +$775K |
|
272
Chipotle Mexican Grill
CMG
$55.1B
| $770K | 0.03% |
+92,600
| New | +$770K |
|
|
NETI
273
DELISTED
Eneti Inc.
NETI
| $767K | 0.03% |
+11,633
| New | +$767K |
|
274
Etsy
ETSY
$5.36B
| $766K | 0.03% |
51,119
+33,809
| +195% | +$507K |
|
275
Direxion Daily Energy Bull 2X Shares
ERX
$218M
| $759K | 0.03% |
3,031
+1,674
| +123% | +$419K |
|