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 | |
|---|---|---|---|---|---|---|
|
ALR
2476
PUT
DELISTED
Alere Inc
ALR
| $46K | ﹤0.01% |
750
-3
| -0.4% | -$145 |
|
2477
PUT
Abbott
ABT
$180B
| $45K | ﹤0.01% |
727
-2,282
| -76% | -$103K |
|
2478
Banner Corp
BANR
$2.39B
| $45K | ﹤0.01% |
+802
| New | +$44.1K |
|
2479
CALL
Cracker Barrel
CBRL
$1.2B
| $45K | ﹤0.01% |
101
-99
| -50% | -$16.1K |
|
2480
PUT
Eastman Chemical
EMN
$7.8B
| $45K | ﹤0.01% |
446
+375
| +528% | +$30.2K |
|
2481
PUT
Enterprise Products Partners
EPD
$83.8B
| $45K | ﹤0.01% |
160
-349
| -69% | -$9.46K |
|
2482
PUT
Equinix
EQIX
$107B
| $45K | ﹤0.01% |
141
-165
| -54% | -$69.9K |
|
|
GRMN
2483
CALL
Garmin
GRMN
$46.9B
| $45K | ﹤0.01% |
382
+33
| +9% | +$1.69K |
|
2484
PUT
ICICI Bank
IBN
$106B
| $45K | ﹤0.01% |
1,321
-130
| -9% | -$1.1K |
|
2485
Itron
ITRI
$3.73B
| $45K | ﹤0.01% |
666
-90
| -12% | -$5.9K |
|
2486
CALL
Manulife Financial
MFC
$72.6B
| $45K | ﹤0.01% |
434
+344
| +382% | +$6.06K |
|
2487
CALL
Myriad Genetics
MYGN
$530M
| $45K | ﹤0.01% |
146
+125
| +595% | +$2.65K |
|
2488
PUT
Nutanix
NTNX
$14.9B
| $45K | ﹤0.01% |
554
-388
| -41% | -$6.77K |
|
2489
CALL
Range Resources
RRC
$9.11B
| $45K | ﹤0.01% |
946
+4
| +0.4% | +$101 |
|
2490
CALL
SolarEdge
SEDG
$2.59B
| $45K | ﹤0.01% |
194
-358
| -65% | -$6.34K |
|
2491
CALL
Starwood Property Trust
STWD
$6.12B
| $45K | ﹤0.01% |
834
+165
| +25% | +$3.69K |
|
2492
PUT
Teleflex
TFX
$5.85B
| $45K | ﹤0.01% |
219
+90
| +70% | +$18K |
|
2493
CALL
Varex Imaging
VREX
$460M
| $45K | ﹤0.01% |
124
-1
| -0.8% | -$34 |
|
|
ONIT
2494
CALL
Onity Group
ONIT
$333M
| $45K | ﹤0.01% |
154
+8
| +5% | +$380 |
|
|
CMRX
2495
CALL
DELISTED
Chimerix, Inc.
CMRX
| $45K | ﹤0.01% |
993
+747
| +304% | +$3.93K |
|
|
CERN
2496
CALL
DELISTED
Cerner Corp
CERN
| $45K | ﹤0.01% |
165
-297
| -64% | -$19K |
|
|
WFT
2497
PUT
DELISTED
Weatherford International plc
WFT
| $45K | ﹤0.01% |
425
-640
| -60% | -$3.25K |
|
|
MZOR
2498
PUT
DELISTED
Mazor Robotics Ltd.
MZOR
| $45K | ﹤0.01% |
232
+161
| +227% | +$5.76K |
|
|
ALOG
2499
DELISTED
Analogic Corp
ALOG
| $45K | ﹤0.01% |
+622
| New | +$44.6K |
|
|
CHUBK
2500
DELISTED
CommerceHub, Inc. Series C Common Stock
CHUBK
| $45K | ﹤0.01% |
+2,598
| New | +$42.9K |
|
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.