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 | |
|---|---|---|---|---|---|---|
901
CALL
Intercontinental Exchange
ICE
$81B
| $3.18M | 0.01% |
425
-80
| -16% | -$6.01K |
|
|
AKRX
902
CALL
DELISTED
Akorn Inc
AKRX
| $3.17M | 0.01% |
2,444
+730
| +43% | +$12K |
|
903
PUT
Prudential Financial
PRU
$40.7B
| $3.17M | 0.01% |
313
-1,333
| -81% | -$131K |
|
|
EBIX
904
PUT
DELISTED
Ebix Inc
EBIX
| $3.15M | 0.01% |
398
+86
| +28% | +$6.85K |
|
905
CALL
Fortinet
FTNT
$112B
| $3.15M | 0.01% |
1,705
+620
| +57% | +$9.48K |
|
906
PUT
Enterprise Products Partners
EPD
$84.2B
| $3.14M | 0.01% |
1,093
+684
| +167% | +$19.8K |
|
907
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.14M | 0.01% |
373
+186
| +99% | +$16K |
|
908
CALL
Atlassian
TEAM
$21B
| $3.13M | 0.01% |
326
+210
| +181% | +$16.6K |
|
|
K
909
CALL
DELISTED
Kellanova
K
| $3.13M | 0.01% |
476
+301
| +172% | +$20.3K |
|
910
PUT
Casey's General Stores
CASY
$32.6B
| $3.12M | 0.01% |
242
+160
| +195% | +$18.4K |
|
911
iShares 7-10 Year Treasury Bond ETF
IEF
$47B
| $3.11M | 0.01% |
+30,767
| New | +$3.14M |
|
|
AIMC
912
DELISTED
Altra Industrial Motion Corp
AIMC
| $3.11M | 0.01% |
+75,213
| New | +$3.14M |
|
913
PUT
AnaptysBio
ANAB
$1.61B
| $3.1M | 0.01% |
311
+306
| +6,120% | +$25.4K |
|
914
PUT
HCA Healthcare
HCA
$83.5B
| $3.1M | 0.01% |
223
-102
| -31% | -$12.7K |
|
915
CALL
Sysco
SYY
$38.8B
| $3.08M | 0.01% |
421
+252
| +149% | +$18.2K |
|
916
PUT
Helmerich & Payne
HP
$3.58B
| $3.07M | 0.01% |
447
-131
| -23% | -$8.36K |
|
917
CALL
Neurocrine Biosciences
NBIX
$17.3B
| $3.06M | 0.01% |
249
+100
| +67% | +$11.3K |
|
|
FL
918
PUT
DELISTED
Foot Locker
FL
| $3.06M | 0.01% |
600
-246
| -29% | -$12.2K |
|
919
CALL
Amplify Junior Silver Miners ETF
SILJ
$3.29B
| $3.06M | 0.01% |
763
+527
| +223% | +$5.04K |
|
920
PUT
Harley-Davidson
HOG
$2.81B
| $3.05M | 0.01% |
673
-550
| -45% | -$23.9K |
|
921
CALL
Advance Auto Parts
AAP
$3.29B
| $3.05M | 0.01% |
181
+58
| +47% | +$8.91K |
|
|
CS
922
PUT
DELISTED
Credit Suisse Group
CS
| $3.04M | 0.01% |
2,036
-779
| -28% | -$11.9K |
|
923
PUT
Telecom Argentina
TEO
$5.81B
| $3.04M | 0.01% |
1,745
+1,673
| +2,324% | +$30.8K |
|
924
PUT
Johnson Controls International
JCI
$87.7B
| $3.04M | 0.01% |
868
+431
| +99% | +$15.9K |
|
|
CTXS
925
DELISTED
Citrix Systems Inc
CTXS
| $3.04M | 0.01% |
+27,310
| New | +$3.02M |
|
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.