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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 39.87% |
| 2 | Technology | 13.76% |
| 3 | Communication Services | 11.79% |
| 4 | Consumer Discretionary | 10.02% |
| 5 | Healthcare | 7.62% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
776
CALL
American Tower
AMT
$81.9B
| $400K | 0.02% |
428
+114
| +36% | +$14.6K |
|
777
Invesco Senior Loan ETF
BKLN
$6.77B
| $400K | 0.02% |
17,315
-12,685
| -42% | -$295K |
|
|
SPA
778
DELISTED
Sparton
SPA
| $400K | 0.02% |
18,193
-10,689
| -37% | -$211K |
|
779
Rithm Capital
RITM
$5.63B
| $399K | 0.02% |
25,682
+23,246
| +954% | +$385K |
|
780
MPLX
MPLX
$60.5B
| $398K | 0.02% |
+11,940
| New | +$413K |
|
|
FLIR
781
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $398K | 0.02% |
+11,507
| New | +$420K |
|
782
DexCom
DXCM
$33.2B
| $397K | 0.02% |
21,740
+3,616
| +20% | +$66.8K |
|
|
AGU
783
DELISTED
Agrium
AGU
| $397K | 0.02% |
4,388
+1,758
| +67% | +$162K |
|
784
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$727M
| $396K | 0.02% |
5,428
+556
| +11% | +$13.1K |
|
785
PUT
BP
BP
$113B
| $394K | 0.02% |
2,040
+634
| +45% | +$19.7K |
|
786
MKS Inc
MKSI
$17.6B
| $394K | 0.02% |
+5,868
| New | +$445K |
|
787
Carlisle Companies
CSL
$14B
| $393K | 0.02% |
+4,120
| New | +$416K |
|
788
Ethan Allen Interiors
ETD
$567M
| $392K | 0.02% |
12,154
+11,422
| +1,560% | +$336K |
|
789
CALL
Hasbro
HAS
$13.1B
| $392K | 0.02% |
471
+50
| +12% | +$5.15K |
|
|
HDS
790
DELISTED
HD Supply Holdings, Inc.
HDS
| $392K | 0.02% |
12,811
+4,678
| +58% | +$177K |
|
791
Open Text
OTEX
$5.8B
| $391K | 0.02% |
12,420
+5,413
| +77% | +$179K |
|
792
Evercore
EVR
$11.5B
| $390K | 0.02% |
+5,537
| New | +$403K |
|
793
CALL
Truist Financial
TFC
$63.1B
| $390K | 0.02% |
1,294
-789
| -38% | -$34.3K |
|
794
Vanguard Morningstar Small-Cap ETF
VB
$81B
| $389K | 0.02% |
2,871
-5,324
| -65% | -$713K |
|
795
PUT
Autodesk
ADSK
$45.5B
| $387K | 0.02% |
1,089
+905
| +492% | +$89.5K |
|
|
ITCI
796
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $387K | 0.02% |
31,214
+31,060
| +20,169% | +$360K |
|
|
SINA
797
CALL
DELISTED
Sina Corp
SINA
| $386K | 0.02% |
575
+236
| +70% | +$19.9K |
|
798
PUT
NOV
NOV
$7.63B
| $385K | 0.02% |
1,139
+829
| +267% | +$28.6K |
|
|
DD
799
CALL
DELISTED
Du Pont De Nemours E I
DD
| $384K | 0.02% |
1,565
+1,125
| +256% | +$89.9K |
|
800
Bank OZK
OZK
$5.5B
| $383K | 0.02% |
+8,185
| New | +$389K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $118M in Q2 2017, closing 1,474 positions and reducing 2,319 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Miscellaneous at 40% of assets, up from 40% a quarter earlier, followed by Technology and Communication Services.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.