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 | |
|---|---|---|---|---|---|---|
4451
PUT
FreightCar America
RAIL
$263M
| $6K | ﹤0.01% |
137
-108
| -44% | -$1.68K |
|
4452
PUT
Rollins
ROL
$18.6B
| $6K | ﹤0.01% |
+250
| New | +$4.48K |
|
4453
PUT
Sanmina
SANM
$8.78B
| $6K | ﹤0.01% |
+49
| New | +$1.86K |
|
4454
PUT
Star Bulk Carriers
SBLK
$3.05B
| $6K | ﹤0.01% |
73
+40
| +121% | +$372 |
|
4455
CALL
ScottsMiracle-Gro
SMG
$4.09B
| $6K | ﹤0.01% |
54
-155
| -74% | -$14K |
|
4456
CALL
TD Synnex
SNX
$19.9B
| $6K | ﹤0.01% |
66
+56
| +560% | +$3.13K |
|
|
4457
PUT
TD Synnex
SNX
$19.9B
| $6K | ﹤0.01% |
74
+30
| +68% | +$1.68K |
|
4458
CALL
SPX Corp
SPXC
$9.39B
| $6K | ﹤0.01% |
30
+18
| +150% | +$449 |
|
4459
CALL
Sterling Infrastructure
STRL
$15.2B
| $6K | ﹤0.01% |
20
-28
| -58% | -$285 |
|
4460
CALL
Sunoco
SUN
$14.4B
| $6K | ﹤0.01% |
64
-165
| -72% | -$4.92K |
|
4461
ProShares Short 20+ Year Treasury ETF
TBF
$87.2M
| $6K | ﹤0.01% |
+290
| New | +$6.62K |
|
|
TBI
4462
Trueblue
TBI
$227M
| $6K | ﹤0.01% |
263
-893
| -77% | -$23.8K |
|
4463
PUT
TE Connectivity
TEL
$60B
| $6K | ﹤0.01% |
+118
| New | +$9.03K |
|
4464
PUT
Truist Financial
TFC
$63.9B
| $6K | ﹤0.01% |
117
-1,847
| -94% | -$80.2K |
|
4465
TFS Financial
TFSL
$5.11B
| $6K | ﹤0.01% |
437
-278
| -39% | -$4.49K |
|
4466
Teekay Tankers
TNK
$2.71B
| $6K | ﹤0.01% |
417
-67
| -14% | -$1.04K |
|
4467
CALL
Toro Company
TTC
$8.79B
| $6K | ﹤0.01% |
68
+65
| +2,167% | +$4.34K |
|
4468
CALL
Televisa
TV
$1.49B
| $6K | ﹤0.01% |
27
-20
| -43% | -$497 |
|
|
4469
PUT
Televisa
TV
$1.49B
| $6K | ﹤0.01% |
54
-46
| -46% | -$1.14K |
|
4470
CALL
TherapeuticsMD
TXMD
$23.8M
| $6K | ﹤0.01% |
2
-2
| -50% | -$501 |
|
4471
CALL
UBS Group
UBS
$170B
| $6K | ﹤0.01% |
191
-134
| -41% | -$2.18K |
|
4472
PUT
Verisk Analytics
VRSK
$27.7B
| $6K | ﹤0.01% |
27
-45
| -63% | -$3.64K |
|
4473
PUT
Valvoline
VVV
$5.06B
| $6K | ﹤0.01% |
73
+40
| +121% | +$927 |
|
4474
Westamerica Bancorp
WABC
$1.39B
| $6K | ﹤0.01% |
117
+19
| +19% | +$1.03K |
|
4475
PUT
Webster Financial
WBS
$12.3B
| $6K | ﹤0.01% |
41
+1
| +3% | +$51 |
|
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.