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 | |
|---|---|---|---|---|---|---|
|
PINC
2826
PUT
DELISTED
Premier
PINC
| $462K | ﹤0.01% |
122
-267
| -69% | -$9.4K |
|
|
VGR
2827
CALL
DELISTED
Vector Group Ltd.
VGR
| $462K | ﹤0.01% |
477
+108
| +29% | +$945 |
|
2828
PUT
Anika Therapeutics
ANIK
$199M
| $461K | ﹤0.01% |
89
-4
| -4% | -$232 |
|
|
DVAX
2829
DELISTED
Dynavax Technologies
DVAX
| $461K | ﹤0.01% |
80,704
+46,250
| +134% | +$247K |
|
|
DCH
2830
PUT
Dauch Corp
DCH
$1.3B
| $460K | ﹤0.01% |
428
-450
| -51% | -$4.28K |
|
2831
CareDx
CDNA
$1.92B
| $459K | ﹤0.01% |
21,308
-4,222
| -17% | -$96.9K |
|
2832
iShares S&P 100 ETF
OEF
$19.8B
| $459K | ﹤0.01% |
3,190
+2,920
| +1,081% | +$401K |
|
2833
CALL
CoreCivic
CXW
$3.1B
| $458K | ﹤0.01% |
264
+36
| +16% | +$570 |
|
2834
PUT
Navient
NAVI
$774M
| $458K | ﹤0.01% |
335
+212
| +172% | +$2.85K |
|
|
SGMO
2835
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $458K | ﹤0.01% |
54,727
+3,438
| +7% | +$31.6K |
|
2836
PUT
Builders FirstSource
BLDR
$7.84B
| $457K | ﹤0.01% |
180
+127
| +240% | +$3.04K |
|
2837
CALL
Element Solutions
ESI
$9.12B
| $456K | ﹤0.01% |
391
+35
| +10% | +$386 |
|
2838
Sempra
SRE
$60.8B
| $456K | ﹤0.01% |
+6,028
| New | +$442K |
|
2839
PUT
LivePerson
LPSN
$18.9M
| $455K | ﹤0.01% |
8
+2
| +33% | +$1.15K |
|
|
MPT
2840
PUT
Medical Properties Trust
MPT
$2.89B
| $455K | ﹤0.01% |
216
+66
| +44% | +$1.34K |
|
2841
NIO
NIO
$11.3B
| $455K | ﹤0.01% |
+113,310
| New | +$228K |
|
2842
PUT
AMC Entertainment Holdings
AMC
$2.03B
| $454K | ﹤0.01% |
63
+25
| +66% | +$2.2K |
|
2843
PUT
Jabil
JBL
$32.8B
| $454K | ﹤0.01% |
110
-41
| -27% | -$1.57K |
|
|
SF
2844
CALL
Stifel
SF
$12.3B
| $454K | ﹤0.01% |
169
+20
| +13% | +$523 |
|
2845
EPAM Systems
EPAM
$4.69B
| $453K | ﹤0.01% |
2,137
+1,378
| +182% | +$271K |
|
2846
Banco Bilbao Vizcaya Argentaria
BBVA
$144B
| $452K | ﹤0.01% |
81,164
+79,284
| +4,217% | +$422K |
|
2847
CALL
EPR Properties
EPR
$4.86B
| $452K | ﹤0.01% |
64
+37
| +137% | +$2.73K |
|
2848
CALL
Avis
CAR
$5.63B
| $451K | ﹤0.01% |
140
+20
| +17% | +$600 |
|
2849
PUT
Energizer
ENR
$1.44B
| $451K | ﹤0.01% |
90
-32
| -26% | -$1.47K |
|
2850
CALL
Navios Maritime Partners
NMM
$2.25B
| $450K | ﹤0.01% |
242
+134
| +124% | +$2.5K |
|
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.