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 | Miscellaneous | 97.48% |
| 2 | Technology | 0.51% |
| 3 | Communication Services | 0.5% |
| 4 | Healthcare | 0.37% |
| 5 | Industrials | 0.31% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
K
1051
CALL
DELISTED
Kellanova
K
| $2.8M | 0.01% |
557
-1,273
| -70% | -$67.6K |
|
1052
CALL
Itaú Unibanco
ITUB
$89.8B
| $2.8M | 0.01% |
4,086
+3,957
| +3,067% | +$24.9K |
|
|
MLNX
1053
PUT
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $2.8M | 0.01% |
253
-198
| -44% | -$22.8K |
|
1054
CALL
Cadence Design Systems
CDNS
$80.6B
| $2.8M | 0.01% |
395
-480
| -55% | -$32.1K |
|
1055
PUT
Fluor
FLR
$7.51B
| $2.8M | 0.01% |
830
+746
| +888% | +$25K |
|
1056
CALL
Assured Guaranty
AGO
$3.33B
| $2.79M | 0.01% |
663
-311
| -32% | -$13.7K |
|
1057
PUT
Newell Brands
NWL
$2.6B
| $2.78M | 0.01% |
1,804
+358
| +25% | +$5.36K |
|
1058
PUT
Raymond James Financial
RJF
$34.3B
| $2.78M | 0.01% |
494
-172
| -26% | -$9.8K |
|
1059
CALL
Bread Financial
BFH
$4.26B
| $2.77M | 0.01% |
248
+108
| +77% | +$13.1K |
|
1060
CALL
Baker Hughes
BKR
$63B
| $2.77M | 0.01% |
1,124
-73
| -6% | -$1.76K |
|
|
BZUN
1061
CALL
Baozun
BZUN
$167M
| $2.77M | 0.01% |
555
-168
| -23% | -$7.25K |
|
1062
CALL
Alexandria Real Estate Equities
ARE
$9.06B
| $2.77M | 0.01% |
196
+3
| +2% | +$433 |
|
1063
CALL
Corteva
CTVA
$58.6B
| $2.76M | 0.01% |
+935
| New | +$25.2K |
|
1064
Sarepta Therapeutics
SRPT
$2.38B
| $2.75M | 0.01% |
18,090
+8,913
| +97% | +$1.08M |
|
1065
CALL
Ollie's Bargain Outlet
OLLI
$4.55B
| $2.74M | 0.01% |
315
+206
| +189% | +$19.4K |
|
1066
CALL
Howmet Aerospace
HWM
$103B
| $2.74M | 0.01% |
1,385
-954
| -41% | -$16.1K |
|
1067
PUT
Abercrombie & Fitch
ANF
$6.65B
| $2.74M | 0.01% |
1,708
+1,150
| +206% | +$26.6K |
|
1068
PUT
NetApp
NTAP
$36.5B
| $2.73M | 0.01% |
443
+99
| +29% | +$6.68K |
|
1069
PUT
CRH
CRH
$62.7B
| $2.73M | 0.01% |
834
+212
| +34% | +$6.89K |
|
1070
PUT
Ingredion
INGR
$6.39B
| $2.73M | 0.01% |
331
+326
| +6,520% | +$28K |
|
|
MRTX
1071
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $2.73M | 0.01% |
265
-37
| -12% | -$2.88K |
|
1072
CALL
Bath & Body Works
BBWI
$3.93B
| $2.73M | 0.01% |
1,293
+641
| +98% | +$12.7K |
|
|
MXIM
1073
CALL
DELISTED
Maxim Integrated Products
MXIM
| $2.73M | 0.01% |
456
+198
| +77% | +$11.3K |
|
1074
Pinduoduo
PDD
$117B
| $2.72M | 0.01% |
131,916
+3,893
| +3% | +$84.3K |
|
1075
CALL
Hartford Financial Services
HIG
$37.5B
| $2.72M | 0.01% |
488
+199
| +69% | +$10.5K |
|
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 1,300 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 Miscellaneous at 97% of assets, up from 97% a quarter earlier, followed by Technology and Communication Services.
- 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 1,300 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.