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 | |
|---|---|---|---|---|---|---|
776
CALL
State Street
STT
$50.6B
| $3.34M | 0.01% |
530
+292
| +123% | +$20.9K |
|
777
CALL
Essex Property Trust
ESS
$18.8B
| $3.33M | 0.01% |
136
+75
| +123% | +$18.9K |
|
778
PUT
Viatris
VTRS
$20.1B
| $3.33M | 0.01% |
1,217
-892
| -42% | -$28.9K |
|
779
CALL
Gen Digital
GEN
$15.1B
| $3.33M | 0.01% |
1,764
-214
| -11% | -$4.42K |
|
780
CALL
Albemarle
ALB
$13.8B
| $3.33M | 0.01% |
432
-85
| -16% | -$8.02K |
|
781
PUT
Air Products & Chemicals
APD
$65.5B
| $3.33M | 0.01% |
208
+117
| +129% | +$18.5K |
|
782
PUT
Novartis
NVS
$297B
| $3.33M | 0.01% |
433
-246
| -36% | -$19.1K |
|
783
CALL
Textron
TXT
$16.2B
| $3.33M | 0.01% |
724
+661
| +1,049% | +$37.2K |
|
|
NLSN
784
PUT
DELISTED
Nielsen Holdings plc
NLSN
| $3.33M | 0.01% |
1,426
+131
| +10% | +$3.39K |
|
|
785
CALL
Viatris
VTRS
$20.1B
| $3.32M | 0.01% |
1,212
+780
| +181% | +$25.3K |
|
|
WW
786
CALL
DELISTED
WW International
WW
| $3.32M | 0.01% |
861
+196
| +29% | +$10.8K |
|
787
CALL
Scotiabank
BNS
$106B
| $3.32M | 0.01% |
665
+428
| +181% | +$23.1K |
|
788
PUT
Dropbox
DBX
$6.63B
| $3.31M | 0.01% |
1,623
-398
| -20% | -$9.17K |
|
789
PUT
Aptiv
APTV
$11.9B
| $3.31M | 0.01% |
540
+89
| +20% | +$6.45K |
|
|
FRC
790
CALL
DELISTED
First Republic Bank
FRC
| $3.3M | 0.01% |
380
+379
| +37,900% | +$34.6K |
|
791
CALL
Genuine Parts
GPC
$16.6B
| $3.29M | 0.01% |
343
-240
| -41% | -$23.8K |
|
792
PUT
VeriSign
VRSN
$23.8B
| $3.29M | 0.01% |
222
-374
| -63% | -$56.1K |
|
793
Direxion Daily Small Cap Bear 3x ETF
TZA
$210M
| $3.29M | 0.01% |
+540
| New | +$2.57M |
|
794
CALL
Upbound Group
UPBD
$1.23B
| $3.29M | 0.01% |
2,030
+1,313
| +183% | +$19.1K |
|
|
WCG
795
CALL
DELISTED
Wellcare Health Plans, Inc.
WCG
| $3.28M | 0.01% |
139
+75
| +117% | +$20.1K |
|
796
Macy's
M
$6.14B
| $3.27M | 0.01% |
109,965
+43,873
| +66% | +$1.44M |
|
797
CALL
Ross Stores
ROST
$74.5B
| $3.27M | 0.01% |
393
+176
| +81% | +$15.9K |
|
798
CALL
Xerox
XRX
$341M
| $3.26M | 0.01% |
1,651
-136
| -8% | -$3.49K |
|
799
FedEx
FDX
$74.7B
| $3.26M | 0.01% |
20,219
-21,990
| -52% | -$4.65M |
|
800
CALL
Lennar Class B
LEN.B
$19.4B
| $3.26M | 0.01% |
875
+237
| +37% | +$7.79K |
|
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.