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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BKI
951
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $3.96M | 0.01% |
615
-18
| -3% | -$1.11K |
|
952
PUT
Devon Energy
DVN
$52.2B
| $3.96M | 0.01% |
1,526
+659
| +76% | +$14.8K |
|
953
Microchip Technology
MCHP
$44.2B
| $3.92M | 0.01% |
74,860
+73,136
| +4,242% | +$3.53M |
|
|
GAP
954
PUT
The Gap Inc
GAP
$6.8B
| $3.91M | 0.01% |
2,214
+962
| +77% | +$16.4K |
|
955
CALL
Papa John's
PZZA
$999M
| $3.91M | 0.01% |
619
-706
| -53% | -$41.8K |
|
956
CALL
ASML
ASML
$693B
| $3.91M | 0.01% |
132
-81
| -38% | -$21.9K |
|
957
PUT
J.M. Smucker
SJM
$12.4B
| $3.9M | 0.01% |
375
-17
| -4% | -$1.8K |
|
958
Humana
HUM
$47.4B
| $3.9M | 0.01% |
10,647
-1,451
| -12% | -$460K |
|
959
PUT
AstraZeneca
AZN
$261B
| $3.9M | 0.01% |
391
+44
| +13% | +$4.14K |
|
960
PUT
MSC Industrial Direct
MSM
$7.03B
| $3.9M | 0.01% |
497
+314
| +172% | +$23.2K |
|
|
LHCG
961
CALL
DELISTED
LHC Group LLC
LHCG
| $3.9M | 0.01% |
283
-149
| -34% | -$18.5K |
|
962
CALL
First Solar
FSLR
$22.1B
| $3.89M | 0.01% |
696
+20
| +3% | +$1.1K |
|
|
MMP
963
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $3.88M | 0.01% |
618
+475
| +332% | +$29.6K |
|
964
CALL
Targa Resources
TRGP
$61.3B
| $3.86M | 0.01% |
946
+309
| +49% | +$12K |
|
965
PUT
Caesars Entertainment
CZR
$6.09B
| $3.86M | 0.01% |
647
+599
| +1,248% | +$29.7K |
|
966
CALL
Suncor Energy
SU
$78.4B
| $3.86M | 0.01% |
1,176
-535
| -31% | -$16.7K |
|
967
PUT
Pultegroup
PHM
$23.7B
| $3.85M | 0.01% |
993
-270
| -21% | -$10.5K |
|
|
HRC
968
CALL
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
| $3.85M | 0.01% |
339
+328
| +2,982% | +$34.6K |
|
969
CALL
Cintas
CTAS
$81.3B
| $3.85M | 0.01% |
572
+44
| +8% | +$2.89K |
|
970
CALL
Allstate
ALL
$65.5B
| $3.85M | 0.01% |
342
+52
| +18% | +$5.68K |
|
971
CALL
Restaurant Brands International
QSR
$25.1B
| $3.85M | 0.01% |
603
-14
| -2% | -$937 |
|
972
Valero Energy
VLO
$90.6B
| $3.83M | 0.01% |
+40,961
| New | +$3.87M |
|
973
ProShares UltraPro S&P 500
UPRO
$5.09B
| $3.82M | 0.01% |
+109,244
| New | +$3.35M |
|
974
PUT
Freeport-McMoran
FCX
$91.3B
| $3.82M | 0.01% |
2,913
-48
| -2% | -$527 |
|
975
CALL
Novartis
NVS
$297B
| $3.82M | 0.01% |
567
-655
| -54% | -$58.8K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.