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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
276
iShares MSCI China ETF
MCHI
$8.12B
| $854K | ﹤0.01% |
14,375
-541
| -4% | -$32.1K |
|
277
MarketAxess Holdings
MKTX
$6.99B
| $852K | ﹤0.01% |
2,651
-1,168
| -31% | -$375K |
|
278
Vulcan Materials
VMC
$39.5B
| $852K | ﹤0.01% |
+6,205
| New | +$852K |
|
279
Robert Half
RHI
$3.66B
| $847K | ﹤0.01% |
+14,866
| New | +$847K |
|
280
Cal-Maine
CALM
$5.41B
| $833K | ﹤0.01% |
+19,971
| New | +$833K |
|
281
Immersion
IMMR
$231M
| $826K | ﹤0.01% |
108,612
+6,594
| +6% | +$50.1K |
|
282
Unilever
UL
$155B
| $822K | ﹤0.01% |
+13,272
| New | +$822K |
|
283
iShares MSCI South Korea ETF
EWY
$5.26B
| $818K | ﹤0.01% |
13,664
-27,588
| -67% | -$1.65M |
|
284
CF Industries
CF
$13.7B
| $811K | ﹤0.01% |
17,375
+3,943
| +29% | +$184K |
|
285
MongoDB
MDB
$26.9B
| $809K | ﹤0.01% |
5,324
-26,611
| -83% | -$4.04M |
|
|
CS
286
DELISTED
Credit Suisse Group
CS
| $805K | ﹤0.01% |
67,267
-57,002
| -46% | -$682K |
|
287
Direxion Daily Junior Gold Miners Index Bull 2X Shares
JNUG
$468M
| $804K | ﹤0.01% |
1,343
+1,299
| +2,952% | +$778K |
|
288
Kroger
KR
$44.7B
| $804K | ﹤0.01% |
37,037
-40,685
| -52% | -$883K |
|
289
Marsh & McLennan
MMC
$99.2B
| $801K | ﹤0.01% |
+8,040
| New | +$801K |
|
290
Caterpillar
CAT
$196B
| $800K | ﹤0.01% |
5,873
+5,753
| +4,794% | +$784K |
|
291
Essential Properties Realty Trust
EPRT
$6.04B
| $798K | ﹤0.01% |
39,832
-2,215
| -5% | -$44.4K |
|
292
Paychex
PAYX
$48.7B
| $794K | ﹤0.01% |
+9,655
| New | +$794K |
|
293
Vistra
VST
$65.7B
| $788K | ﹤0.01% |
+34,832
| New | +$788K |
|
294
Colgate-Palmolive
CL
$68B
| $787K | ﹤0.01% |
10,988
-63,192
| -85% | -$4.53M |
|
|
AERI
295
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $786K | ﹤0.01% |
26,613
+2,218
| +9% | +$65.5K |
|
|
LGF.A
296
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $785K | ﹤0.01% |
64,158
+54,942
| +596% | +$672K |
|
297
Crown Holdings
CCK
$10.9B
| $782K | ﹤0.01% |
12,807
+10,466
| +447% | +$639K |
|
298
Keurig Dr Pepper
KDP
$37.5B
| $782K | ﹤0.01% |
+27,062
| New | +$782K |
|
299
VanEck Rare Earth/Strategic Metals ETF
REMX
$744M
| $781K | ﹤0.01% |
17,139
+14,356
| +516% | +$654K |
|
|
CONE
300
DELISTED
CyrusOne Inc Common Stock
CONE
| $777K | ﹤0.01% |
13,467
+12,898
| +2,267% | +$744K |
|