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 | |
|---|---|---|---|---|---|---|
2301
ProShares UltraShort Gold
GLL
$128M
| $55K | ﹤0.01% |
+182
| New | +$54.3K |
|
2302
CALL
Hewlett Packard
HPE
$63.2B
| $55K | ﹤0.01% |
2,592
+1,594
| +160% | +$22.2K |
|
|
IRBT
2303
CALL
DELISTED
iRobot
IRBT
| $55K | ﹤0.01% |
192
+141
| +276% | +$12.2K |
|
2304
CALL
Lazard
LAZ
$4.37B
| $55K | ﹤0.01% |
200
+153
| +326% | +$6.86K |
|
2305
Lloyds Banking Group
LYG
$87.4B
| $55K | ﹤0.01% |
+15,766
| New | +$56K |
|
2306
CALL
NetApp
NTAP
$32.9B
| $55K | ﹤0.01% |
554
+157
| +40% | +$6.26K |
|
2307
PUT
Parker-Hannifin
PH
$125B
| $55K | ﹤0.01% |
197
-181
| -48% | -$28.7K |
|
|
RDUS
2308
CALL
DELISTED
Radius Recycling
RDUS
| $55K | ﹤0.01% |
162
-59
| -27% | -$1.17K |
|
2309
CALL
Ralph Lauren
RL
$22.2B
| $55K | ﹤0.01% |
152
-257
| -63% | -$19.3K |
|
2310
CALL
STMicroelectronics
STM
$46B
| $55K | ﹤0.01% |
1,693
+366
| +28% | +$5.77K |
|
2311
PUT
TAL Education Group
TAL
$5.71B
| $55K | ﹤0.01% |
1,626
-2,520
| -61% | -$49.5K |
|
2312
CALL
T. Rowe Price
TROW
$25B
| $55K | ﹤0.01% |
173
+25
| +17% | +$1.79K |
|
2313
PUT
Wayfair
W
$11.1B
| $55K | ﹤0.01% |
600
+497
| +483% | +$29.5K |
|
|
WW
2314
PUT
DELISTED
WW International
WW
| $55K | ﹤0.01% |
1,360
+551
| +68% | +$13.3K |
|
|
WAGE
2315
DELISTED
WageWorks, Inc.
WAGE
| $55K | ﹤0.01% |
832
-176
| -17% | -$12.5K |
|
|
WPZ
2316
CALL
DELISTED
Williams Partners L.P.
WPZ
| $55K | ﹤0.01% |
529
-39
| -7% | -$1.56K |
|
2317
CALL
Boise Cascade
BCC
$2.74B
| $54K | ﹤0.01% |
267
-66
| -20% | -$1.93K |
|
2318
Cal-Maine
CALM
$4.28B
| $54K | ﹤0.01% |
1,370
-1,895
| -58% | -$72.6K |
|
2319
PUT
Cadence Design Systems
CDNS
$90B
| $54K | ﹤0.01% |
320
+306
| +2,186% | +$10.2K |
|
2320
PUT
Conduent
CNDT
$230M
| $54K | ﹤0.01% |
492
+384
| +356% | +$6.29K |
|
2321
CALL
Darling Ingredients
DAR
$9.93B
| $54K | ﹤0.01% |
548
-362
| -40% | -$5.59K |
|
2322
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
| $54K | ﹤0.01% |
26
+24
| +1,200% | +$64.4K |
|
2323
PUT
Hecla Mining
HL
$10.2B
| $54K | ﹤0.01% |
179
+24
| +15% | +$133 |
|
2324
Laureate Education
LAUR
$5.18B
| $54K | ﹤0.01% |
+3,126
| New | +$49.5K |
|
2325
Oshkosh
OSK
$9.67B
| $54K | ﹤0.01% |
+795
| New | +$53.5K |
|
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.