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 | |
|---|---|---|---|---|---|---|
1826
Boston Beer
SAM
$1.88B
| $92K | ﹤0.01% |
+702
| New | +$98.2K |
|
1827
CALL
Sysco
SYY
$39.7B
| $92K | ﹤0.01% |
356
-21
| -6% | -$1.12K |
|
|
JCP
1828
PUT
DELISTED
J.C. Penney Company, Inc.
JCP
| $92K | ﹤0.01% |
666
-813
| -55% | -$4.16K |
|
1829
CALL
Cirrus Logic
CRUS
$6.74B
| $91K | ﹤0.01% |
235
+82
| +54% | +$5.31K |
|
1830
PUT
Park Hotels & Resorts
PK
$2.97B
| $91K | ﹤0.01% |
226
-47
| -17% | -$1.24K |
|
1831
CALL
Synchrony
SYF
$23.7B
| $91K | ﹤0.01% |
974
+62
| +7% | +$1.84K |
|
1832
PUT
Corpay
CPAY
$24.2B
| $91K | ﹤0.01% |
413
+125
| +43% | +$17.9K |
|
|
ZNGA
1833
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $91K | ﹤0.01% |
+25,009
| New | +$82.1K |
|
|
TIVO
1834
DELISTED
Tivo Inc
TIVO
| $91K | ﹤0.01% |
+4,902
| New | +$89.3K |
|
|
MOBL
1835
DELISTED
MobileIron, Inc.
MOBL
| $91K | ﹤0.01% |
15,182
+12,235
| +415% | +$64K |
|
1836
Deluxe
DLX
$1.19B
| $90K | ﹤0.01% |
1,313
-1,414
| -52% | -$98.6K |
|
1837
CALL
GameStop
GME
$9.5B
| $90K | ﹤0.01% |
4,948
+868
| +21% | +$4.9K |
|
1838
CALL
Genuine Parts
GPC
$17.1B
| $90K | ﹤0.01% |
770
+224
| +41% | +$20.6K |
|
1839
W.W. Grainger
GWW
$65.3B
| $90K | ﹤0.01% |
+503
| New | +$94.9K |
|
|
HIMX
1840
CALL
Himax Technologies
HIMX
$2.2B
| $90K | ﹤0.01% |
752
-390
| -34% | -$2.98K |
|
1841
CALL
Landstar System
LSTR
$6.8B
| $90K | ﹤0.01% |
+178
| New | +$15.1K |
|
1842
PUT
Universal Display
OLED
$3.71B
| $90K | ﹤0.01% |
166
-94
| -36% | -$9.9K |
|
1843
CALL
Molson Coors Class B
TAP
$7.68B
| $90K | ﹤0.01% |
335
-153
| -31% | -$14.2K |
|
1844
CALL
Textron
TXT
$16.6B
| $90K | ﹤0.01% |
513
+120
| +31% | +$5.64K |
|
|
TIF
1845
CALL
DELISTED
Tiffany & Co.
TIF
| $90K | ﹤0.01% |
236
+45
| +24% | +$4.13K |
|
|
MNK
1846
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $90K | ﹤0.01% |
470
-22
| -4% | -$965 |
|
1847
CALL
Agnico Eagle Mines
AEM
$72.6B
| $89K | ﹤0.01% |
466
-197
| -30% | -$9.25K |
|
1848
CALL
Arista Networks
ANET
$219B
| $89K | ﹤0.01% |
3,856
+1,568
| +69% | +$14.2K |
|
1849
Dynagas LNG Partners
DLNG
$131M
| $89K | ﹤0.01% |
+5,860
| New | +$92.4K |
|
1850
Fortuna Silver Mines
FSM
$2.59B
| $89K | ﹤0.01% |
18,326
+17,212
| +1,545% | +$82.6K |
|
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.