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 | Miscellaneous | 97.5% |
| 2 | Communication Services | 0.5% |
| 3 | Consumer Discretionary | 0.49% |
| 4 | Technology | 0.41% |
| 5 | Financials | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
826
CALL
Global Payments
GPN
$24.5B
| $3.07M | 0.01% |
298
+277
| +1,319% | +$30.5K |
|
827
PUT
Paycom
PAYC
$10.4B
| $3.07M | 0.01% |
251
+127
| +102% | +$16.3K |
|
|
IMMU
828
PUT
DELISTED
Immunomedics Inc
IMMU
| $3.07M | 0.01% |
2,151
+976
| +83% | +$19.4K |
|
829
PUT
SAP
SAP
$248B
| $3.07M | 0.01% |
308
+96
| +45% | +$10.2K |
|
830
PUT
Crown Castle
CCI
$32.3B
| $3.06M | 0.01% |
282
-73
| -21% | -$8.02K |
|
831
CALL
GSK
GSK
$100B
| $3.04M | 0.01% |
638
+259
| +68% | +$12.8K |
|
832
lululemon athletica
LULU
$11.1B
| $3.04M | 0.01% |
25,011
-779
| -3% | -$104K |
|
833
PUT
KB Home
KBH
$3.2B
| $3.04M | 0.01% |
1,592
+933
| +142% | +$19.1K |
|
834
CALL
Dell
DELL
$339B
| $3.04M | 0.01% |
1,227
-1,178
| -49% | -$32.2K |
|
|
TRCO
835
PUT
DELISTED
TRIBUNE MEDIA COMPANY CLASS A
TRCO
| $3.03M | 0.01% |
668
+562
| +530% | +$22.7K |
|
836
PUT
ProShares UltraShort Industrials
SIJ
$6.24M
| $3.02M | 0.01% |
102
+79
| +343% | +$22.1K |
|
837
PUT
Tapestry
TPR
$24.4B
| $3.02M | 0.01% |
894
+540
| +153% | +$21.7K |
|
838
Ulta Beauty
ULTA
$24.1B
| $3.02M | 0.01% |
12,326
-4,300
| -26% | -$1.19M |
|
839
Altria Group
MO
$115B
| $3.02M | 0.01% |
61,059
+57,677
| +1,705% | +$3.34M |
|
840
CALL
Broadridge
BR
$19.7B
| $3.01M | 0.01% |
313
+199
| +175% | +$21.5K |
|
841
CALL
New Oriental
EDU
$9.47B
| $3M | 0.01% |
548
-894
| -62% | -$51.8K |
|
842
Restaurant Brands International
QSR
$28B
| $3M | 0.01% |
+57,282
| New | +$3.18M |
|
843
CALL
Allison Transmission
ALSN
$10.8B
| $2.97M | 0.01% |
677
+412
| +155% | +$19.1K |
|
844
CALL
Yum China
YUMC
$14.8B
| $2.97M | 0.01% |
886
-261
| -23% | -$8.96K |
|
845
CALL
Murphy USA
MUSA
$9.4B
| $2.96M | 0.01% |
387
+79
| +26% | +$6.23K |
|
846
CALL
Sony
SONY
$143B
| $2.96M | 0.01% |
3,070
-1,690
| -36% | -$17.9K |
|
847
PUT
Howmet Aerospace
HWM
$103B
| $2.96M | 0.01% |
2,305
+933
| +68% | +$14.6K |
|
848
PUT
MSCI
MSCI
$41.7B
| $2.96M | 0.01% |
201
+59
| +42% | +$8.98K |
|
849
American International
AIG
$39.8B
| $2.96M | 0.01% |
75,175
-7,822
| -9% | -$342K |
|
850
CALL
Bread Financial
BFH
$4.26B
| $2.96M | 0.01% |
247
+201
| +437% | +$31.5K |
|
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 1,572 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 Miscellaneous at 97% of assets, up from 95% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- 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 1,572 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.