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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1351
PUT
Toronto Dominion Bank
TD
$198B
| $1.4M | ﹤0.01% |
281
+137
| +95% | +$7.5K |
|
|
AYX
1352
CALL
DELISTED
Alteryx Inc
AYX
| $1.4M | ﹤0.01% |
235
+224
| +2,036% | +$12.2K |
|
1353
PUT
Insulet
PODD
$11.3B
| $1.4M | ﹤0.01% |
176
+63
| +56% | +$5.33K |
|
1354
CALL
Teradyne
TER
$54.8B
| $1.4M | ﹤0.01% |
445
+106
| +31% | +$3.6K |
|
|
DISH
1355
DELISTED
DISH Network Corp.
DISH
| $1.4M | ﹤0.01% |
+55,914
| New | +$1.76M |
|
1356
CALL
ICICI Bank
IBN
$106B
| $1.39M | ﹤0.01% |
1,355
+661
| +95% | +$6.24K |
|
1357
PUT
SBA Communications
SBAC
$18.4B
| $1.39M | ﹤0.01% |
86
-18
| -17% | -$2.93K |
|
|
ONCE
1358
PUT
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $1.39M | ﹤0.01% |
355
+44
| +14% | +$1.91K |
|
1359
CALL
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $1.39M | ﹤0.01% |
541
-222
| -29% | -$1.83K |
|
1360
Viatris
VTRS
$20.1B
| $1.39M | ﹤0.01% |
50,642
-805
| -2% | -$26.1K |
|
1361
CALL
Howard Hughes
HHH
$3.93B
| $1.39M | ﹤0.01% |
149
+147
| +7,350% | +$15.3K |
|
|
FLIR
1362
CALL
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $1.38M | ﹤0.01% |
318
+245
| +336% | +$12K |
|
1363
PUT
Ollie's Bargain Outlet
OLLI
$4.01B
| $1.38M | ﹤0.01% |
208
+53
| +34% | +$4.41K |
|
|
VIAB
1364
PUT
DELISTED
Viacom Inc. Class B
VIAB
| $1.38M | ﹤0.01% |
536
-159
| -23% | -$4.9K |
|
1365
PUT
MBIA
MBI
$288M
| $1.38M | ﹤0.01% |
1,545
-1,093
| -41% | -$10.4K |
|
1366
Axalta
AXTA
$7.01B
| $1.38M | ﹤0.01% |
58,745
+36,436
| +163% | +$905K |
|
1367
CALL
PVH
PVH
$3.71B
| $1.38M | ﹤0.01% |
148
-13
| -8% | -$1.49K |
|
1368
CALL
SPS Commerce
SPSC
$2.25B
| $1.38M | ﹤0.01% |
334
-126
| -27% | -$5.5K |
|
|
CZR
1369
PUT
DELISTED
Caesars Entertainment Corporation
CZR
| $1.38M | ﹤0.01% |
2,026
+806
| +66% | +$6.79K |
|
1370
PUT
Brinker International
EAT
$8.02B
| $1.37M | ﹤0.01% |
312
+76
| +32% | +$3.61K |
|
1371
PUT
Packaging Corp of America
PKG
$22.7B
| $1.37M | ﹤0.01% |
164
+154
| +1,540% | +$14.3K |
|
1372
HealthEquity
HQY
$7.91B
| $1.36M | ﹤0.01% |
22,890
+22,073
| +2,702% | +$1.78M |
|
1373
PUT
Supernus Pharmaceuticals
SUPN
$2.68B
| $1.36M | ﹤0.01% |
410
+11
| +3% | +$473 |
|
1374
CALL
Ball Corp
BALL
$17B
| $1.36M | ﹤0.01% |
296
+231
| +355% | +$10.8K |
|
1375
State Street Utilities Select Sector SPDR ETF
XLU
$24.1B
| $1.36M | ﹤0.01% |
51,454
+43,454
| +543% | +$1.18M |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.