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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
HES
226
DELISTED
Hess
HES
| $1.08M | ﹤0.01% |
+17,954
| New | +$1.08M |
|
227
Vanguard Real Estate ETF
VNQ
$34.6B
| $1.08M | ﹤0.01% |
12,400
+4,217
| +52% | +$366K |
|
|
NAV
228
DELISTED
Navistar International
NAV
| $1.08M | ﹤0.01% |
+33,342
| New | +$1.08M |
|
229
EQT Corp
EQT
$31.5B
| $1.06M | ﹤0.01% |
51,317
+24,460
| +91% | +$507K |
|
|
MRNS
230
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $1.06M | ﹤0.01% |
63,550
+44,084
| +226% | +$737K |
|
231
iRhythm Technologies
IRTC
$5.9B
| $1.05M | ﹤0.01% |
+14,068
| New | +$1.05M |
|
232
Carlyle Group
CG
$22.8B
| $1.05M | ﹤0.01% |
57,484
+8,566
| +18% | +$156K |
|
233
Prologis
PLD
$106B
| $1.04M | ﹤0.01% |
14,449
+10,559
| +271% | +$759K |
|
234
Elevance Health
ELV
$70.6B
| $1.01M | ﹤0.01% |
+3,528
| New | +$1.01M |
|
235
iShares MSCI Hong Kong ETF
EWH
$710M
| $1.01M | ﹤0.01% |
+38,581
| New | +$1.01M |
|
236
Knight Transportation
KNX
$7.06B
| $1M | ﹤0.01% |
+30,693
| New | +$1M |
|
237
Monster Beverage
MNST
$61B
| $1M | ﹤0.01% |
+36,692
| New | +$1M |
|
|
MRTX
238
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $984K | ﹤0.01% |
13,435
+8,121
| +153% | +$595K |
|
239
SBA Communications
SBAC
$21.3B
| $981K | ﹤0.01% |
+4,918
| New | +$981K |
|
240
Alcoa
AA
$8.09B
| $980K | ﹤0.01% |
34,836
+34,636
| +17,318% | +$974K |
|
241
Marvell Technology
MRVL
$54.5B
| $979K | ﹤0.01% |
+49,253
| New | +$979K |
|
242
BlackBerry
BB
$2.28B
| $976K | ﹤0.01% |
+96,780
| New | +$976K |
|
243
National Grid
NGG
$69.4B
| $976K | ﹤0.01% |
19,494
+14,455
| +287% | +$724K |
|
244
Ametek
AME
$43B
| $970K | ﹤0.01% |
11,700
+2,077
| +22% | +$172K |
|
245
Stryker
SYK
$150B
| $959K | ﹤0.01% |
+4,858
| New | +$959K |
|
246
Tenaris
TS
$18.3B
| $951K | ﹤0.01% |
33,699
+29,506
| +704% | +$833K |
|
247
Zions Bancorporation
ZION
$8.4B
| $951K | ﹤0.01% |
20,957
-1,487
| -7% | -$67.5K |
|
248
Zscaler
ZS
$42B
| $949K | ﹤0.01% |
13,382
+10,619
| +384% | +$753K |
|
249
Arlo Technologies
ARLO
$1.89B
| $944K | ﹤0.01% |
+228,746
| New | +$944K |
|
|
ETFC
250
DELISTED
E*Trade Financial Corporation
ETFC
| $943K | ﹤0.01% |
20,325
-13,352
| -40% | -$619K |
|