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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
Expedia Group
EXPE
$31.2B
| $3.86M | 0.01% |
28,693
+28,513
| +15,841% | +$3.77M |
|
877
PUT
RenaissanceRe
RNR
$13.8B
| $3.85M | 0.01% |
199
+1
| +0.5% | +$186 |
|
878
PUT
Cracker Barrel
CBRL
$1.2B
| $3.84M | 0.01% |
236
-33
| -12% | -$5.55K |
|
879
CALL
Becton Dickinson
BDX
$43.1B
| $3.82M | 0.01% |
155
-151
| -49% | -$37.3K |
|
880
PUT
Carvana
CVNA
$43.3B
| $3.81M | 0.01% |
2,890
-5,860
| -67% | -$84.2K |
|
881
PUT
Stryker
SYK
$127B
| $3.81M | 0.01% |
176
-271
| -61% | -$58.1K |
|
882
PUT
VeriSign
VRSN
$25.5B
| $3.79M | 0.01% |
201
-10
| -5% | -$2.06K |
|
883
CALL
Simon Property Group
SPG
$74.5B
| $3.78M | 0.01% |
243
+186
| +326% | +$28.9K |
|
884
PUT
AerCap
AER
$23.9B
| $3.78M | 0.01% |
690
+392
| +132% | +$20.7K |
|
885
CALL
Acuity Brands
AYI
$9.88B
| $3.77M | 0.01% |
280
+261
| +1,374% | +$34K |
|
886
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.76M | 0.01% |
428
+297
| +227% | +$26.3K |
|
887
PUT
iQIYI
IQ
$1.18B
| $3.76M | 0.01% |
2,329
+344
| +17% | +$6.32K |
|
|
BFYT
888
CALL
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $3.75M | 0.01% |
1,505
+531
| +55% | +$11.2K |
|
889
PUT
Knight Transportation
KNX
$11.8B
| $3.74M | 0.01% |
1,031
+103
| +11% | +$3.58K |
|
890
CALL
AMC Entertainment Holdings
AMC
$2.03B
| $3.74M | 0.01% |
349
+320
| +1,103% | +$34.8K |
|
891
PUT
CrowdStrike
CRWD
$187B
| $3.74M | 0.01% |
2,564
+2,140
| +505% | +$42.5K |
|
892
CALL
International Paper
IP
$22.3B
| $3.73M | 0.01% |
943
-313
| -25% | -$12.2K |
|
893
PUT
Vail Resorts
MTN
$5.19B
| $3.73M | 0.01% |
164
-112
| -41% | -$26.4K |
|
894
CALL
Pultegroup
PHM
$24.5B
| $3.73M | 0.01% |
1,021
-937
| -48% | -$31.2K |
|
895
PUT
Vale
VALE
$62.9B
| $3.72M | 0.01% |
3,239
+892
| +38% | +$10.8K |
|
|
NBIS
896
PUT
Nebius Group N.V.
NBIS
$47.7B
| $3.72M | 0.01% |
1,063
-389
| -27% | -$14.7K |
|
897
PUT
Autoliv
ALV
$8.6B
| $3.69M | 0.01% |
468
+391
| +508% | +$27.8K |
|
|
MRO
898
CALL
DELISTED
Marathon Oil Corporation
MRO
| $3.68M | 0.01% |
3,001
+1,852
| +161% | +$23.9K |
|
899
CALL
Adient
ADNT
$1.6B
| $3.67M | 0.01% |
1,599
+337
| +27% | +$7.68K |
|
900
PUT
Lennar Class B
LEN.B
$20B
| $3.66M | 0.01% |
690
-484
| -41% | -$18.4K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.