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 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 51.63% |
| 2 | Consumer Discretionary | 9.7% |
| 3 | Healthcare | 7.81% |
| 4 | Technology | 7.23% |
| 5 | Communication Services | 6.86% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
801
PUT
American International
AIG
$39.8B
| $228K | 0.02% |
2,282
+667
| +41% | +$40.7K |
|
802
PUT
Herc Holdings
HRI
$4.71B
| $228K | 0.02% |
73
+5
| +7% | +$251 |
|
803
NetApp
NTAP
$36.5B
| $228K | 0.02% |
+8,615
| New | +$269K |
|
804
PUT
Prothena Corp
PRTA
$504M
| $228K | 0.02% |
344
+220
| +177% | +$13.3K |
|
805
Universal Corp
UVV
$1.14B
| $228K | 0.02% |
4,069
+3,117
| +327% | +$171K |
|
806
CALL
Medtronic
MDT
$120B
| $226K | 0.02% |
1,240
-123
| -9% | -$9.26K |
|
807
PUT
Prudential Financial
PRU
$42.1B
| $226K | 0.02% |
661
+442
| +202% | +$36.5K |
|
|
BIN
808
DELISTED
PROGRESSIVE WASTE SOLUTIONS LTD COM
BIN
| $226K | 0.02% |
+9,635
| New | +$230K |
|
809
CALL
Citigroup
C
$231B
| $225K | 0.02% |
1,862
-3,672
| -66% | -$195K |
|
|
LOCK
810
DELISTED
LifeLock, Inc.
LOCK
| $225K | 0.02% |
15,735
+731
| +5% | +$9.39K |
|
|
OMED
811
DELISTED
OncoMed Pharmaceuticals, Inc.
OMED
| $225K | 0.02% |
10,019
+5,336
| +114% | +$109K |
|
812
Direxion Daily FTSE China Bull 3X ETF
YINN
$677M
| $224K | 0.02% |
634
-473
| -43% | -$196K |
|
813
Howard Hughes
HHH
$3.83B
| $223K | 0.02% |
+2,075
| New | +$239K |
|
814
CALL
GoPro
GPRO
$351M
| $222K | 0.02% |
3,360
-1,565
| -32% | -$36.3K |
|
815
CALL
Kinder Morgan
KMI
$69.9B
| $222K | 0.02% |
3,226
+2,378
| +280% | +$56.7K |
|
816
Radware
RDWR
$1.19B
| $222K | 0.02% |
14,509
+14,160
| +4,057% | +$216K |
|
817
Arista Networks
ANET
$244B
| $221K | 0.02% |
45,536
+19,312
| +74% | +$83.8K |
|
818
DexCom
DXCM
$33.2B
| $221K | 0.02% |
10,820
-12,532
| -54% | -$261K |
|
819
PUT
Terex
TEX
$7.23B
| $221K | 0.02% |
420
+16
| +4% | +$316 |
|
820
CALL
United Airlines
UAL
$36.2B
| $221K | 0.02% |
538
-160
| -23% | -$9.24K |
|
|
VALE.P
821
PUT
DELISTED
Vale S A
VALE.P
| $221K | 0.02% |
649
-396
| -38% | -$1.28K |
|
822
PUT
Novartis
NVS
$304B
| $220K | 0.02% |
194
-24
| -11% | -$1.91K |
|
823
Restaurant Brands International
QSR
$28B
| $220K | 0.02% |
5,914
-916
| -13% | -$33.6K |
|
|
ENDP
824
PUT
DELISTED
Endo International plc
ENDP
| $220K | 0.02% |
694
+549
| +379% | +$33.4K |
|
825
CALL
Universal Display
OLED
$3.78B
| $218K | 0.02% |
306
+133
| +77% | +$5.86K |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $39.7M of net new capital in Q4 2015, opening 1,415 new positions and adding to 1,993 existing holdings. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
By sector, the portfolio is most concentrated in Miscellaneous at 52% of assets, down from 65% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $13.8M trimmed.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,415 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.