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 | |
|---|---|---|---|---|---|---|
|
SNP
1251
CALL
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $2.16M | 0.01% |
317
-40
| -11% | -$2.91K |
|
1252
PUT
Ashland
ASH
$3.04B
| $2.16M | 0.01% |
270
+245
| +980% | +$18.9K |
|
1253
PUT
Paylocity
PCTY
$6.71B
| $2.16M | 0.01% |
230
+158
| +219% | +$15K |
|
1254
CALL
Scorpio Tankers
STNG
$3.96B
| $2.15M | 0.01% |
730
-593
| -45% | -$15K |
|
1255
CALL
RenaissanceRe
RNR
$13.7B
| $2.15M | 0.01% |
+121
| New | +$19.9K |
|
1256
PUT
Interactive Brokers
IBKR
$40.9B
| $2.15M | 0.01% |
1,588
-1,972
| -55% | -$26.7K |
|
1257
PUT
Enbridge
ENB
$124B
| $2.15M | 0.01% |
596
+93
| +18% | +$3.39K |
|
1258
Liberty Global Class C
LBTYK
$3.27B
| $2.15M | 0.01% |
80,998
+46,708
| +136% | +$1.2M |
|
1259
Bath & Body Works
BBWI
$4.01B
| $2.15M | 0.01% |
101,774
-1,816
| -2% | -$35.9K |
|
1260
PUT
American Water Works
AWK
$26.3B
| $2.15M | 0.01% |
185
+138
| +294% | +$15.2K |
|
1261
Automatic Data Processing
ADP
$100B
| $2.14M | 0.01% |
12,970
+2,534
| +24% | +$412K |
|
1262
Progressive
PGR
$124B
| $2.14M | 0.01% |
26,813
-21,973
| -45% | -$1.7M |
|
|
BBBY
1263
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $2.14M | 0.01% |
1,844
-1,991
| -52% | -$29.5K |
|
1264
iShares Expanded Tech-Software Sector ETF
IGV
$13B
| $2.14M | 0.01% |
48,965
+28,940
| +145% | +$1.24M |
|
1265
PUT
Pool Corp
POOL
$6.7B
| $2.14M | 0.01% |
112
-22
| -16% | -$3.97K |
|
1266
PUT
Quest Diagnostics
DGX
$25.1B
| $2.14M | 0.01% |
210
-243
| -54% | -$23.4K |
|
1267
CALL
Realty Income
O
$61.2B
| $2.14M | 0.01% |
320
+167
| +109% | +$11.4K |
|
1268
Prologis
PLD
$138B
| $2.13M | 0.01% |
26,618
+12,169
| +84% | +$926K |
|
1269
CALL
NIO
NIO
$11.3B
| $2.13M | 0.01% |
8,352
-1,429
| -15% | -$5.74K |
|
|
ZGNX
1270
PUT
DELISTED
Zogenix, Inc.
ZGNX
| $2.13M | 0.01% |
445
+291
| +189% | +$11.7K |
|
1271
PUT
Coty
COTY
$2.33B
| $2.13M | 0.01% |
1,586
-1,504
| -49% | -$18.5K |
|
|
CYBR
1272
CALL
DELISTED
CyberArk
CYBR
| $2.12M | 0.01% |
166
-157
| -49% | -$19.9K |
|
1273
CALL
STMicroelectronics
STM
$46B
| $2.11M | 0.01% |
1,200
+804
| +203% | +$13.6K |
|
1274
PUT
Brinker International
EAT
$8.02B
| $2.1M | 0.01% |
534
+482
| +927% | +$19.8K |
|
1275
Adient
ADNT
$1.6B
| $2.1M | 0.01% |
86,431
+73,940
| +592% | +$1.52M |
|
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.