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 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
776
Brighthouse Financial
BHF
$3.63B
| $441K | 0.02% |
8,580
-346
| -4% | -$20K |
|
777
Intellia Therapeutics
NTLA
$1.5B
| $440K | 0.02% |
20,877
-26,841
| -56% | -$660K |
|
778
iShares Latin America 40 ETF
ILF
$3.77B
| $438K | 0.02% |
+11,663
| New | +$437K |
|
779
PUT
Take-Two Interactive
TTWO
$43B
| $438K | 0.02% |
374
-467
| -56% | -$52.3K |
|
|
AET
780
PUT
DELISTED
Aetna Inc
AET
| $437K | 0.02% |
666
-558
| -46% | -$100K |
|
|
CNSL
781
DELISTED
Consolidated Communications Holdings, Inc.
CNSL
| $436K | 0.02% |
39,807
+2,819
| +8% | +$33.8K |
|
|
TRTN
782
DELISTED
Triton International Limited
TRTN
| $436K | 0.02% |
14,255
+6,445
| +83% | +$216K |
|
783
PUT
Deere & Co
DE
$170B
| $435K | 0.02% |
1,349
-1,202
| -47% | -$195K |
|
|
APC
784
CALL
DELISTED
Anadarko Petroleum
APC
| $434K | 0.02% |
1,373
+558
| +68% | +$32.7K |
|
785
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.58B
| $433K | 0.02% |
10,496
-505
| -5% | -$23.5K |
|
786
National Health Investors
NHI
$3.9B
| $432K | 0.02% |
6,434
+623
| +11% | +$42.6K |
|
787
New York Times
NYT
$11.6B
| $432K | 0.02% |
+17,934
| New | +$412K |
|
788
ResMed
RMD
$28.3B
| $432K | 0.02% |
+4,396
| New | +$415K |
|
789
PUT
Pfizer
PFE
$140B
| $430K | 0.02% |
2,965
+1,705
| +135% | +$58.6K |
|
790
PUT
United Parcel Service
UPS
$97.6B
| $430K | 0.02% |
1,687
-79
| -4% | -$9.13K |
|
791
WisdomTree
WT
$2.97B
| $430K | 0.02% |
46,927
+32,474
| +225% | +$351K |
|
792
CALL
Sony
SONY
$123B
| $429K | 0.02% |
3,600
+390
| +12% | +$3.84K |
|
793
CALL
Veeva Systems
VEEV
$30.3B
| $429K | 0.02% |
609
+65
| +12% | +$4.2K |
|
794
CALL
Kohl's
KSS
$2.03B
| $427K | 0.02% |
1,041
-107
| -9% | -$6.79K |
|
|
RDFN
795
DELISTED
Redfin
RDFN
| $426K | 0.02% |
18,676
+12,121
| +185% | +$279K |
|
796
Carvana
CVNA
$43.3B
| $424K | 0.02% |
92,595
+70,825
| +325% | +$283K |
|
797
ProShares Ultra NASDAQ Biotechnology
BIB
$82.2M
| $423K | 0.02% |
7,688
+5,350
| +229% | +$320K |
|
|
ABB
798
DELISTED
ABB Ltd
ABB
| $423K | 0.02% |
+17,840
| New | +$459K |
|
|
FMI
799
DELISTED
Foundation Medicine, Inc.
FMI
| $423K | 0.02% |
+5,378
| New | +$397K |
|
|
TFCF
800
CALL
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $422K | 0.02% |
1,187
-2,933
| -71% | -$107K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.