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 | |
|---|---|---|---|---|---|---|
|
SGMO
1276
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $1.54M | ﹤0.01% |
1,344
-59
| -4% | -$733 |
|
|
BBBY
1277
PUT
Bed Bath & Beyond
BBBY
$473M
| $1.54M | ﹤0.01% |
1,509
-285
| -16% | -$4.27K |
|
1278
CALL
WD-40
WDFC
$3.1B
| $1.54M | ﹤0.01% |
84
+80
| +2,000% | +$13.5K |
|
1279
PUT
American Electric Power
AEP
$73.7B
| $1.53M | ﹤0.01% |
205
+82
| +67% | +$6.15K |
|
1280
PUT
Lennox International
LII
$18.8B
| $1.53M | ﹤0.01% |
70
-60
| -46% | -$12.7K |
|
1281
PUT
Banco Bradesco
BBD
$38.1B
| $1.53M | ﹤0.01% |
2,472
-2,443
| -50% | -$14.2K |
|
1282
Carnival Corporation Ltd
CCL
$36.1B
| $1.53M | ﹤0.01% |
31,033
+12,322
| +66% | +$706K |
|
1283
CALL
Agios Pharmaceuticals
AGIO
$2.16B
| $1.53M | ﹤0.01% |
331
+163
| +97% | +$10.1K |
|
|
SNBR
1284
PUT
DELISTED
Sleep Number
SNBR
| $1.53M | ﹤0.01% |
481
+398
| +480% | +$14.1K |
|
1285
PUT
Sysco
SYY
$39.7B
| $1.52M | ﹤0.01% |
243
+69
| +40% | +$4.65K |
|
|
GWPH
1286
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $1.52M | ﹤0.01% |
156
-97
| -38% | -$12.7K |
|
1287
CALL
Qorvo
QRVO
$7.63B
| $1.52M | ﹤0.01% |
250
+23
| +10% | +$1.55K |
|
1288
PUT
AvalonBay Communities
AVB
$27.1B
| $1.51M | ﹤0.01% |
87
-31
| -26% | -$5.6K |
|
1289
PUT
State Street
STT
$50.9B
| $1.51M | ﹤0.01% |
239
-312
| -57% | -$22.4K |
|
1290
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $1.5M | ﹤0.01% |
216
+176
| +440% | +$12.6K |
|
1291
CALL
Willis Towers Watson
WTW
$27.9B
| $1.5M | ﹤0.01% |
+99
| New | +$14.8K |
|
1292
CALL
CF Industries
CF
$19.2B
| $1.5M | ﹤0.01% |
345
-156
| -31% | -$7.32K |
|
|
JNPR
1293
PUT
DELISTED
Juniper Networks
JNPR
| $1.5M | ﹤0.01% |
558
-174
| -24% | -$4.92K |
|
|
PVG
1294
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $1.5M | ﹤0.01% |
1,777
+1,542
| +656% | +$12K |
|
|
PFPT
1295
PUT
DELISTED
Proofpoint, Inc.
PFPT
| $1.5M | ﹤0.01% |
179
+102
| +132% | +$9.44K |
|
1296
International Paper
IP
$22.3B
| $1.5M | ﹤0.01% |
39,123
+21,723
| +125% | +$912K |
|
1297
Shopify
SHOP
$148B
| $1.49M | ﹤0.01% |
107,970
+5,290
| +5% | +$74.5K |
|
|
RDUS
1298
CALL
DELISTED
Radius Health, Inc.
RDUS
| $1.49M | ﹤0.01% |
906
+762
| +529% | +$12.8K |
|
|
IMMU
1299
DELISTED
Immunomedics Inc
IMMU
| $1.49M | ﹤0.01% |
104,532
+60,771
| +139% | +$1.21M |
|
1300
PUT
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $1.49M | ﹤0.01% |
595
-952
| -62% | -$7.84K |
|
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.