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
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2126
PUT
Crocs
CROX
$6.69B
| $790K | ﹤0.01% |
400
+247
| +161% | +$5.72K |
|
|
KEM
2127
CALL
DELISTED
KEMET Corporation
KEM
| $790K | ﹤0.01% |
420
+56
| +15% | +$980 |
|
2128
PUT
TechnipFMC
FTI
$30.6B
| $788K | ﹤0.01% |
409
+268
| +190% | +$4.7K |
|
2129
PUT
Pembina Pipeline
PBA
$29.9B
| $788K | ﹤0.01% |
212
+194
| +1,078% | +$7.07K |
|
2130
Vistra
VST
$55.1B
| $788K | ﹤0.01% |
+34,832
| New | +$873K |
|
|
NAV
2131
PUT
DELISTED
Navistar International
NAV
| $788K | ﹤0.01% |
229
+38
| +20% | +$1.26K |
|
|
CTRL
2132
CALL
DELISTED
Control4 Corporation
CTRL
| $788K | ﹤0.01% |
332
+142
| +75% | +$2.98K |
|
2133
Colgate-Palmolive
CL
$72.6B
| $787K | ﹤0.01% |
10,988
-63,192
| -85% | -$4.49M |
|
2134
CALL
Boston Properties
BXP
$11B
| $786K | ﹤0.01% |
61
+33
| +118% | +$4.43K |
|
|
AERI
2135
DELISTED
Aerie Pharmaceuticals
AERI
| $786K | ﹤0.01% |
26,613
+2,218
| +9% | +$85.5K |
|
2136
CALL
Public Storage
PSA
$60.2B
| $785K | ﹤0.01% |
33
-226
| -87% | -$51.8K |
|
|
LGF.A
2137
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $785K | ﹤0.01% |
64,158
+54,942
| +596% | +$790K |
|
2138
CALL
Thor Industries
THO
$3.99B
| $783K | ﹤0.01% |
134
-243
| -64% | -$14.7K |
|
2139
Crown Holdings
CCK
$12.8B
| $782K | ﹤0.01% |
12,807
+10,466
| +447% | +$610K |
|
2140
Keurig Dr Pepper
KDP
$40.4B
| $782K | ﹤0.01% |
+27,062
| New | +$771K |
|
|
TUP
2141
PUT
DELISTED
Tupperware Brands Corporation
TUP
| $782K | ﹤0.01% |
411
+243
| +145% | +$5.46K |
|
2142
PUT
BGC Group
BGC
$5.58B
| $781K | ﹤0.01% |
1,495
+494
| +49% | +$2.56K |
|
2143
PUT
Jack in the Box
JACK
$278M
| $781K | ﹤0.01% |
96
-32
| -25% | -$2.59K |
|
2144
VanEck Rare Earth/Strategic Metals ETF
REMX
$2.03B
| $781K | ﹤0.01% |
17,139
+14,356
| +516% | +$646K |
|
|
CBM
2145
CALL
DELISTED
Cambrex Corporation
CBM
| $781K | ﹤0.01% |
167
-131
| -44% | -$5.5K |
|
2146
PUT
B&G Foods
BGS
$285M
| $780K | ﹤0.01% |
375
+257
| +218% | +$5.93K |
|
2147
CALL
Koppers
KOP
$966M
| $780K | ﹤0.01% |
266
-64
| -19% | -$1.78K |
|
2148
PUT
Medpace
MEDP
$16.8B
| $778K | ﹤0.01% |
119
-85
| -42% | -$4.9K |
|
|
CONE
2149
DELISTED
CyrusOne Inc Common Stock
CONE
| $777K | ﹤0.01% |
13,467
+12,898
| +2,267% | +$756K |
|
2150
BBVA Argentina
BBAR
$3.85B
| $776K | ﹤0.01% |
68,638
+24,848
| +57% | +$232K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.