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 | |
|---|---|---|---|---|---|---|
651
PUT
Blackstone
BX
$152B
| $4.22M | 0.01% |
1,416
+553
| +64% | +$18.3K |
|
652
PUT
Universal Display
OLED
$3.71B
| $4.22M | 0.01% |
451
-189
| -30% | -$19.1K |
|
653
PUT
Skyworks Solutions
SWKS
$9.1B
| $4.21M | 0.01% |
629
-610
| -49% | -$47.1K |
|
654
PUT
Carnival Corporation Ltd
CCL
$34.6B
| $4.21M | 0.01% |
853
-957
| -53% | -$54.8K |
|
655
CALL
Toronto Dominion Bank
TD
$197B
| $4.2M | 0.01% |
845
+466
| +123% | +$25.5K |
|
656
CALL
O'Reilly Automotive
ORLY
$71.4B
| $4.2M | 0.01% |
1,830
-690
| -27% | -$15.7K |
|
|
AZPN
657
PUT
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $4.2M | 0.01% |
511
+498
| +3,831% | +$4.09M |
|
|
SCHW
658
PUT
Charles Schwab
SCHW
$177B
| $4.19M | 0.01% |
1,010
+116
| +13% | +$5.25K |
|
659
PUT
Church & Dwight Co
CHD
$22.8B
| $4.19M | 0.01% |
637
+469
| +279% | +$29.7K |
|
|
APC
660
CALL
DELISTED
Anadarko Petroleum
APC
| $4.18M | 0.01% |
953
+99
| +12% | +$5.58K |
|
661
CALL
Canadian Pacific Kansas City
CP
$82B
| $4.17M | 0.01% |
1,175
+1,030
| +710% | +$41.2K |
|
|
CDK
662
PUT
DELISTED
CDK Global, Inc.
CDK
| $4.16M | 0.01% |
868
+676
| +352% | +$35.7K |
|
663
CALL
iQIYI
IQ
$1.17B
| $4.15M | 0.01% |
2,792
-252
| -8% | -$5.26K |
|
664
CALL
Stellantis
STLA
$16.7B
| $4.15M | 0.01% |
2,868
+1,497
| +109% | +$24.1K |
|
665
PUT
Zillow
Z
$6.77B
| $4.15M | 0.01% |
1,314
+580
| +79% | +$20.6K |
|
666
CALL
Elevance Health
ELV
$82.3B
| $4.12M | 0.01% |
157
-310
| -66% | -$85.2K |
|
|
CTXS
667
DELISTED
Citrix Systems Inc
CTXS
| $4.12M | 0.01% |
40,225
+12,915
| +47% | +$1.36M |
|
668
PUT
Ross Stores
ROST
$74.5B
| $4.12M | 0.01% |
495
+342
| +224% | +$31K |
|
669
Oracle
ORCL
$346B
| $4.11M | 0.01% |
+90,999
| New | +$4.36M |
|
670
PUT
Fidelity National Information Services
FIS
$20.7B
| $4.1M | 0.01% |
400
+352
| +733% | +$36.7K |
|
671
PUT
International Paper
IP
$20.1B
| $4.08M | 0.01% |
1,069
+593
| +125% | +$24.9K |
|
672
CALL
KKR & Co
KKR
$86.2B
| $4.08M | 0.01% |
2,076
+781
| +60% | +$17.9K |
|
|
CRON
673
CALL
Cronos Group
CRON
$1.02B
| $4.07M | 0.01% |
3,915
+2,880
| +278% | +$27.7K |
|
|
JJT
674
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $4.06M | 0.01% |
915
-528
| -37% | -$25.2K |
|
675
PUT
Stanley Black & Decker
SWK
$13.6B
| $4.05M | 0.01% |
338
+15
| +5% | +$1.87K |
|
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.