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 | |
|---|---|---|---|---|---|---|
1551
CALL
D.R. Horton
DHI
$41.2B
| $128K | 0.01% |
1,372
+837
| +156% | +$28K |
|
1552
PUT
Humana
HUM
$46.7B
| $128K | 0.01% |
1,155
-1,584
| -58% | -$359K |
|
1553
NetSol Technologies
NTWK
$51.7M
| $128K | 0.01% |
32,606
+21,913
| +205% | +$97.5K |
|
|
PARA
1554
CALL
DELISTED
Paramount Global Class B
PARA
| $128K | 0.01% |
663
+564
| +570% | +$36.1K |
|
1555
PUT
iShares MSCI Global Gold Miners ETF
RING
$2.31B
| $128K | 0.01% |
2,568
+1,561
| +155% | +$29K |
|
1556
PUT
Tucows
TCX
$97.1M
| $128K | 0.01% |
782
-40
| -5% | -$2.31K |
|
1557
PUT
Tyson Foods
TSN
$20.2B
| $128K | 0.01% |
1,340
-94
| -7% | -$5.76K |
|
|
EMES
1558
PUT
DELISTED
Emerge Energy Services LP
EMES
| $128K | 0.01% |
330
-1,699
| -84% | -$19.6K |
|
|
DNB
1559
DELISTED
Dun & Bradstreet
DNB
| $128K | 0.01% |
1,185
-4,366
| -79% | -$468K |
|
1560
PUT
Akamai
AKAM
$16.8B
| $127K | 0.01% |
698
+90
| +15% | +$4.75K |
|
1561
Aramark
ARMK
$15B
| $127K | 0.01% |
+4,295
| New | +$118K |
|
1562
PUT
C.H. Robinson
CHRW
$22B
| $127K | 0.01% |
382
+303
| +384% | +$21.5K |
|
1563
CALL
PVH
PVH
$3.71B
| $127K | 0.01% |
114
-481
| -81% | -$49.9K |
|
|
KCG
1564
CALL
DELISTED
KCG Holdings, Inc.
KCG
| $127K | 0.01% |
284
-166
| -37% | -$3.22K |
|
|
DCH
1565
PUT
Dauch Corp
DCH
$1.3B
| $126K | 0.01% |
722
+559
| +343% | +$9.1K |
|
1566
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.28B
| $126K | 0.01% |
3,276
-5,452
| -62% | -$209K |
|
|
MASI
1567
PUT
DELISTED
Masimo
MASI
| $126K | 0.01% |
137
+106
| +342% | +$9.73K |
|
1568
CALL
Owens Corning
OC
$11.5B
| $126K | 0.01% |
192
+35
| +22% | +$2.19K |
|
1569
Reading International Class A
RDI
$32.9M
| $126K | 0.01% |
7,870
+5,550
| +239% | +$86.4K |
|
|
CONN
1570
CALL
DELISTED
Conn's Inc.
CONN
| $126K | 0.01% |
354
-42
| -11% | -$680 |
|
|
ARCH
1571
CALL
DELISTED
Arch Resources, Inc.
ARCH
| $126K | 0.01% |
472
-42
| -8% | -$2.95K |
|
1572
CALL
Chemours
CC
$2.59B
| $125K | 0.01% |
467
+181
| +63% | +$7.14K |
|
1573
CALL
Eastman Chemical
EMN
$7.8B
| $125K | 0.01% |
520
+395
| +316% | +$31.8K |
|
|
IRBT
1574
PUT
DELISTED
iRobot
IRBT
| $125K | 0.01% |
378
+19
| +5% | +$1.64K |
|
|
BITA
1575
CALL
DELISTED
Bitauto Holdings Limited
BITA
| $125K | 0.01% |
390
+344
| +748% | +$9.64K |
|
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.