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 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1951
Allegion
ALLE
$13B
| $80K | ﹤0.01% |
988
+597
| +153% | +$46.7K |
|
|
BGFV
1952
PUT
DELISTED
Big 5 Sporting Goods
BGFV
| $80K | ﹤0.01% |
404
-593
| -59% | -$8.51K |
|
1953
CrossAmerica Partners
CAPL
$830M
| $80K | ﹤0.01% |
+3,160
| New | +$79.1K |
|
1954
CALL
Element Solutions
ESI
$9.12B
| $80K | ﹤0.01% |
1,113
+842
| +311% | +$11K |
|
1955
CALL
Howmet Aerospace
HWM
$116B
| $80K | ﹤0.01% |
1,728
-1,091
| -39% | -$22.2K |
|
1956
Novanta
NOVT
$5.04B
| $80K | ﹤0.01% |
2,248
+1,700
| +310% | +$54K |
|
1957
CALL
Tyson Foods
TSN
$20.2B
| $80K | ﹤0.01% |
357
+25
| +8% | +$1.53K |
|
1958
Watts Water Technologies
WTS
$11.5B
| $80K | ﹤0.01% |
1,280
+1,080
| +540% | +$67.4K |
|
1959
PUT
United Parks & Resorts
PRKS
$2.11B
| $80K | ﹤0.01% |
241
-528
| -69% | -$9.07K |
|
|
SGI
1960
CALL
Somnigroup International
SGI
$15.1B
| $80K | ﹤0.01% |
676
-232
| -26% | -$2.73K |
|
|
CTB
1961
DELISTED
Cooper Tire & Rubber Co.
CTB
| $80K | ﹤0.01% |
+2,242
| New | +$86.5K |
|
|
ZGNX
1962
CALL
DELISTED
Zogenix, Inc.
ZGNX
| $80K | ﹤0.01% |
751
-73
| -9% | -$917 |
|
|
VIA
1963
DELISTED
Viacom Inc. Class A
VIA
| $80K | ﹤0.01% |
2,105
+822
| +64% | +$33.8K |
|
1964
CALL
Dillards
DDS
$8.87B
| $79K | ﹤0.01% |
125
+8
| +7% | +$423 |
|
1965
Digimarc Corp
DMRC
$133M
| $79K | ﹤0.01% |
+1,979
| New | +$64K |
|
1966
iShares Latin America 40 ETF
ILF
$3.77B
| $79K | ﹤0.01% |
2,620
+2,048
| +358% | +$63.4K |
|
1967
Lattice Semiconductor
LSCC
$17.6B
| $79K | ﹤0.01% |
11,903
+8,532
| +253% | +$58.4K |
|
1968
PENN Entertainment
PENN
$2.74B
| $79K | ﹤0.01% |
+3,700
| New | +$72.8K |
|
1969
PUT
United States Oil Fund
USO
$2.45B
| $79K | ﹤0.01% |
193
-411
| -68% | -$32.9K |
|
|
WPX
1970
CALL
DELISTED
WPX Energy, Inc.
WPX
| $79K | ﹤0.01% |
685
+99
| +17% | +$1.13K |
|
|
MZOR
1971
CALL
DELISTED
Mazor Robotics Ltd.
MZOR
| $79K | ﹤0.01% |
73
-16
| -18% | -$573 |
|
1972
PUT
Archer Daniels Midland
ADM
$41.4B
| $78K | ﹤0.01% |
574
+163
| +40% | +$7K |
|
1973
American Electric Power
AEP
$73.7B
| $78K | ﹤0.01% |
+1,130
| New | +$78.5K |
|
1974
CALL
Cardinal Health
CAH
$53.4B
| $78K | ﹤0.01% |
623
+100
| +19% | +$7.55K |
|
1975
CALL
Fortinet
FTNT
$112B
| $78K | ﹤0.01% |
3,075
+1,175
| +62% | +$9.11K |
|
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 $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
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.