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 |
Broadcom
AVGO
|
+$33.7M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.8M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.3M |
| 4 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$11.9M |
| 5 |
Citigroup
C
|
+$8.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.2M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.7M |
| 4 |
Walt Disney
DIS
|
+$13.3M |
| 5 |
Booking.com
BKNG
|
+$12.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 60.01% |
| 2 | Technology | 7.86% |
| 3 | Communication Services | 7% |
| 4 | Consumer Discretionary | 5.21% |
| 5 | Healthcare | 4.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1426
W.P. Carey
WPC
$16B
| $93K | 0.01% |
+1,539
| New | +$87.4K |
|
|
SINA
1427
PUT
DELISTED
Sina Corp
SINA
| $93K | 0.01% |
943
+320
| +51% | +$14.4K |
|
|
RDC
1428
DELISTED
Rowan Companies Plc
RDC
| $93K | 0.01% |
+5,797
| New | +$80.2K |
|
1429
CALL
Fidelity National Information Services
FIS
$21.6B
| $92K | 0.01% |
258
+218
| +545% | +$13.1K |
|
1430
CALL
Suncor Energy
SU
$78.8B
| $92K | 0.01% |
557
+331
| +146% | +$8.01K |
|
1431
PUT
Texas Capital Bancshares
TCBI
$4.29B
| $92K | 0.01% |
872
+825
| +1,755% | +$30.5K |
|
|
WNRL
1432
DELISTED
Western Refining Logistics, LP
WNRL
| $92K | 0.01% |
3,971
+2,066
| +108% | +$45.1K |
|
|
KNGT
1433
DELISTED
KNIGHT TRANSPORTATION INC
KNGT
| $92K | 0.01% |
3,521
+3,150
| +849% | +$82.3K |
|
1434
CALL
Aon
AON
$68.5B
| $91K | 0.01% |
100
+45
| +82% | +$4.22K |
|
1435
PUT
Caesarstone
CSTE
$103M
| $91K | 0.01% |
86
+38
| +79% | +$1.36K |
|
1436
PUT
Eaton
ETN
$160B
| $91K | 0.01% |
574
+306
| +114% | +$16.9K |
|
1437
PUT
KKR & Co
KKR
$96.7B
| $91K | 0.01% |
455
+149
| +49% | +$2.03K |
|
1438
CALL
SM Energy
SM
$8.67B
| $91K | 0.01% |
472
+94
| +25% | +$1.3K |
|
1439
VEON
VEON
$4.42B
| $91K | 0.01% |
+860
| New | +$76K |
|
|
NTUS
1440
DELISTED
Natus Medical Inc
NTUS
| $91K | 0.01% |
2,392
-587
| -20% | -$21.9K |
|
|
SFLY
1441
DELISTED
Shutterfly, Inc.
SFLY
| $91K | 0.01% |
+1,974
| New | +$84.1K |
|
|
CUDA
1442
DELISTED
Barracuda Networks, Inc.
CUDA
| $91K | 0.01% |
5,910
+3,184
| +117% | +$40.6K |
|
1443
Akebia Therapeutics
AKBA
$270M
| $90K | 0.01% |
10,097
+7,950
| +370% | +$64.5K |
|
1444
CALL
Axalta
AXTA
$7.66B
| $90K | 0.01% |
245
+127
| +108% | +$3.23K |
|
1445
PUT
DuPont de Nemours
DD
$17.8B
| $90K | 0.01% |
379
-303
| -44% | -$36.3K |
|
1446
iShares S&P 500 Growth ETF
IVW
$77.2B
| $90K | 0.01% |
+3,112
| New | +$85.6K |
|
1447
CALL
Mattel
MAT
$4.15B
| $90K | 0.01% |
518
+31
| +6% | +$942 |
|
1448
CALL
Melco Resorts & Entertainment
MLCO
$1.98B
| $90K | 0.01% |
491
-75
| -13% | -$1.14K |
|
1449
PUT
Vicor
VICR
$8.69B
| $90K | 0.01% |
136
-69
| -34% | -$594 |
|
|
GOLD
1450
PUT
DELISTED
Randgold Resources Ltd
GOLD
| $90K | 0.01% |
469
+232
| +98% | +$18.6K |
|
Similar funds
Simplex Trading's Q1 2016 Portfolio in Review
As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,503 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.
By sector, the portfolio is most concentrated in Miscellaneous at 60% of assets, up from 52% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
- Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
- Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
- Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
- Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
- Simplex Trading opened 1,678 new positions and closed 1,503 in Q1 2016.
- Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.
Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.