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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
726
PUT
Everest Group
EG
$14.8B
| $4.16M | 0.01% |
182
-56
| -24% | -$12.5K |
|
727
PUT
General Dynamics
GD
$101B
| $4.16M | 0.01% |
203
-22
| -10% | -$4.3K |
|
|
CBM
728
PUT
DELISTED
Cambrex Corporation
CBM
| $4.14M | 0.01% |
606
+427
| +239% | +$26.4K |
|
729
CALL
DaVita
DVA
$14.9B
| $4.14M | 0.01% |
578
+74
| +15% | +$5.23K |
|
730
PUT
Dave & Buster's
PLAY
$355M
| $4.13M | 0.01% |
624
+447
| +253% | +$24.2K |
|
731
PUT
Gen Digital
GEN
$15.4B
| $4.13M | 0.01% |
1,939
+78
| +4% | +$1.59K |
|
732
Deere & Co
DE
$164B
| $4.11M | 0.01% |
27,344
-59,957
| -69% | -$8.61M |
|
733
CALL
AerCap
AER
$23.7B
| $4.1M | 0.01% |
713
+147
| +26% | +$8.3K |
|
734
CALL
Centene
CNC
$32.5B
| $4.1M | 0.01% |
566
+150
| +36% | +$10.4K |
|
735
PUT
Dell
DELL
$285B
| $4.09M | 0.01% |
1,500
-1,087
| -42% | -$29K |
|
|
TSS
736
CALL
DELISTED
Total System Services, Inc.
TSS
| $4.09M | 0.01% |
414
+266
| +180% | +$25K |
|
737
Lockheed Martin
LMT
$119B
| $4.08M | 0.01% |
11,783
-10,321
| -47% | -$3.33M |
|
738
PUT
Pinduoduo
PDD
$119B
| $4.07M | 0.01% |
+1,550
| New | +$33.4K |
|
|
P
739
CALL
DELISTED
Pandora Media Inc
P
| $4.07M | 0.01% |
4,284
+2,618
| +157% | +$22.1K |
|
|
AXON
740
PUT
Axon Enterprise
AXON
$39.6B
| $4.07M | 0.01% |
595
+485
| +441% | +$32.7K |
|
741
PUT
Essex Property Trust
ESS
$18.8B
| $4.07M | 0.01% |
165
-70
| -30% | -$16.9K |
|
742
PUT
Nektar Therapeutics
NKTR
$2.34B
| $4.07M | 0.01% |
44
-3
| -6% | -$2.56K |
|
|
FDC
743
CALL
DELISTED
First Data Corporation
FDC
| $4.07M | 0.01% |
1,662
+425
| +34% | +$10.2K |
|
|
CTXS
744
CALL
DELISTED
Citrix Systems Inc
CTXS
| $4.06M | 0.01% |
365
+173
| +90% | +$19.1K |
|
745
PUT
BP
BP
$112B
| $4.05M | 0.01% |
921
-277
| -23% | -$11.6K |
|
746
PUT
Public Storage
PSA
$54.7B
| $4.03M | 0.01% |
200
-8
| -4% | -$1.73K |
|
747
CALL
Yum China
YUMC
$14.9B
| $4.03M | 0.01% |
1,147
+898
| +361% | +$32K |
|
748
CALL
Prudential Financial
PRU
$41.3B
| $4.01M | 0.01% |
396
+57
| +17% | +$5.62K |
|
749
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$718M
| $4M | 0.01% |
1,045
+414
| +66% | +$14K |
|
750
PUT
Simon Property Group
SPG
$73.4B
| $3.98M | 0.01% |
225
-461
| -67% | -$81.5K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.