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 | |
|---|---|---|---|---|---|---|
1226
CALL
CRISPR Therapeutics
CRSP
$4.58B
| $2.23M | 0.01% |
473
+48
| +11% | +$1.92K |
|
1227
CALL
Acadia Healthcare
ACHC
$3.17B
| $2.23M | 0.01% |
637
+613
| +2,554% | +$19.8K |
|
1228
PUT
WEX
WEX
$6.11B
| $2.23M | 0.01% |
107
+23
| +27% | +$4.63K |
|
|
LOGM
1229
CALL
DELISTED
LogMein, Inc.
LOGM
| $2.23M | 0.01% |
302
+107
| +55% | +$8.27K |
|
1230
PUT
Arrow Electronics
ARW
$10.9B
| $2.22M | 0.01% |
312
-77
| -20% | -$5.67K |
|
1231
Waste Management
WM
$95.9B
| $2.22M | 0.01% |
19,271
+16,364
| +563% | +$1.78M |
|
1232
PUT
Itaú Unibanco
ITUB
$91.3B
| $2.22M | 0.01% |
3,242
-77
| -2% | -$485 |
|
1233
PUT
MPLX
MPLX
$59.5B
| $2.22M | 0.01% |
689
-33
| -5% | -$1.05K |
|
1234
CALL
Cintas
CTAS
$82.4B
| $2.21M | 0.01% |
372
+184
| +98% | +$10.2K |
|
1235
CALL
Western Union
WU
$2.57B
| $2.2M | 0.01% |
1,105
-249
| -18% | -$4.85K |
|
|
DISH
1236
DELISTED
DISH Network Corp.
DISH
| $2.2M | 0.01% |
57,220
+44,640
| +355% | +$1.58M |
|
|
ICPT
1237
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $2.2M | 0.01% |
276
-537
| -66% | -$48.1K |
|
|
MDR
1238
DELISTED
McDermott International
MDR
| $2.19M | 0.01% |
+227,232
| New | +$1.81M |
|
1239
PUT
Banco Macro
BMA
$5.7B
| $2.19M | 0.01% |
301
+279
| +1,268% | +$14.4K |
|
|
CJ
1240
CALL
DELISTED
C&J Energy Services, Inc.
CJ
| $2.19M | 0.01% |
1,858
+66
| +4% | +$904 |
|
|
SKX
1241
CALL
DELISTED
Skechers
SKX
| $2.18M | 0.01% |
693
-657
| -49% | -$20.3K |
|
1242
PUT
CBRE Group
CBRE
$40.8B
| $2.18M | 0.01% |
425
-31
| -7% | -$1.54K |
|
1243
CALL
Pan American Silver
PAAS
$18.6B
| $2.18M | 0.01% |
1,687
+1,449
| +609% | +$17.5K |
|
1244
CALL
UBS Group
UBS
$170B
| $2.17M | 0.01% |
1,836
-97
| -5% | -$1.19K |
|
1245
AutoZone
AZO
$48.3B
| $2.17M | 0.01% |
+1,976
| New | +$2.08M |
|
|
ICPT
1246
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $2.17M | 0.01% |
273
+48
| +21% | +$4.3K |
|
|
COHR
1247
PUT
DELISTED
Coherent Inc
COHR
| $2.17M | 0.01% |
159
-21
| -12% | -$2.84K |
|
|
ABK
1248
CALL
DELISTED
Ambac Financial Group
ABK
| $2.17M | 0.01% |
1,287
+1,137
| +758% | +$1.92M |
|
1249
CALL
Masco
MAS
$16B
| $2.17M | 0.01% |
552
+264
| +92% | +$10.2K |
|
1250
Deere & Co
DE
$170B
| $2.16M | 0.01% |
13,063
+7,362
| +129% | +$1.15M |
|
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.