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 | |
|---|---|---|---|---|---|---|
1801
PUT
Tanger
SKT
$4.82B
| $1.37M | ﹤0.01% |
932
+349
| +60% | +$5.46K |
|
1802
CALL
Lincoln National
LNC
$7.91B
| $1.37M | ﹤0.01% |
232
+54
| +30% | +$3.18K |
|
1803
Qorvo
QRVO
$7.63B
| $1.37M | ﹤0.01% |
11,779
+5,602
| +91% | +$542K |
|
1804
PUT
Wabtec
WAB
$51.1B
| $1.37M | ﹤0.01% |
176
-675
| -79% | -$50K |
|
1805
CALL
Ziff Davis
ZD
$1.9B
| $1.37M | ﹤0.01% |
168
-34
| -17% | -$2.81K |
|
|
AMED
1806
DELISTED
Amedisys
AMED
| $1.37M | ﹤0.01% |
+8,192
| New | +$1.22M |
|
1807
Direxion Daily Small Cap Bear 3x ETF
TZA
$213M
| $1.37M | ﹤0.01% |
486
+378
| +350% | +$1.25M |
|
1808
CoStar Group
CSGP
$11.3B
| $1.36M | ﹤0.01% |
22,800
-4,200
| -16% | -$245K |
|
1809
CALL
Domo
DOMO
$166M
| $1.36M | ﹤0.01% |
628
+509
| +428% | +$9.4K |
|
1810
CALL
Associated Banc-Corp
ASB
$5.81B
| $1.36M | ﹤0.01% |
618
+616
| +30,800% | +$13K |
|
1811
CALL
Karyopharm Therapeutics
KPTI
$168M
| $1.36M | ﹤0.01% |
47
+8
| +21% | +$1.74K |
|
|
ROCC
1812
CALL
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $1.36M | ﹤0.01% |
448
+159
| +55% | +$4.23K |
|
|
AMWD
1813
PUT
DELISTED
American Woodmark
AMWD
| $1.36M | ﹤0.01% |
130
+82
| +171% | +$8.24K |
|
1814
PUT
Consolidated Edison
ED
$41.6B
| $1.36M | ﹤0.01% |
150
+116
| +341% | +$10.4K |
|
1815
CALL
Moody's
MCO
$81.7B
| $1.35M | ﹤0.01% |
57
+26
| +84% | +$5.78K |
|
1816
Ball Corp
BALL
$17B
| $1.35M | ﹤0.01% |
20,879
-830
| -4% | -$56.2K |
|
1817
Banco Bradesco
BBD
$38.1B
| $1.35M | ﹤0.01% |
200,769
+128,179
| +177% | +$803K |
|
|
BECN
1818
PUT
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $1.35M | ﹤0.01% |
422
+4
| +1% | +$127 |
|
1819
Lam Research
LRCX
$382B
| $1.35M | ﹤0.01% |
+46,080
| New | +$1.22M |
|
1820
CALL
Ryder
R
$10.3B
| $1.34M | ﹤0.01% |
247
+200
| +426% | +$10.4K |
|
1821
Lowe's Companies
LOW
$116B
| $1.34M | ﹤0.01% |
11,192
+9,342
| +505% | +$1.07M |
|
|
SIVB
1822
DELISTED
SVB Financial Group
SIVB
| $1.34M | ﹤0.01% |
+5,331
| New | +$1.21M |
|
|
ZUO
1823
CALL
DELISTED
Zuora, Inc.
ZUO
| $1.33M | ﹤0.01% |
932
-5
| -0.5% | -$73 |
|
1824
PUT
Manulife Financial
MFC
$72.6B
| $1.33M | ﹤0.01% |
657
+656
| +65,600% | +$12.5K |
|
|
EPZM
1825
CALL
DELISTED
Epizyme, Inc
EPZM
| $1.33M | ﹤0.01% |
542
+438
| +421% | +$6.5K |
|
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.