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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1176
CALL
Credit Acceptance
CACC
$6.07B
| $167K | 0.01% |
51
+27
| +113% | +$5.23K |
|
1177
CALL
Idexx Laboratories
IDXX
$42.7B
| $167K | 0.01% |
188
+4
| +2% | +$456 |
|
|
MJN
1178
PUT
DELISTED
Mead Johnson Nutrition Company
MJN
| $167K | 0.01% |
332
+54
| +19% | +$4.03K |
|
1179
DexCom
DXCM
$27.5B
| $166K | 0.01% |
+11,136
| New | +$197K |
|
|
GOLD
1180
PUT
DELISTED
Randgold Resources Ltd
GOLD
| $166K | 0.01% |
433
-41
| -9% | -$3.25K |
|
1181
CALL
CME Group
CME
$91B
| $165K | 0.01% |
281
-118
| -30% | -$13.1K |
|
1182
Evolent Health
EVH
$481M
| $165K | 0.01% |
11,179
+11,026
| +7,207% | +$217K |
|
1183
Realty Income
O
$60.8B
| $165K | 0.01% |
+2,969
| New | +$167K |
|
|
SGYPW
1184
CALL
DELISTED
Synergy Pharmaceuticals, Inc. - Warrants
SGYPW
| $165K | 0.01% |
1,297
+968
| +294% | +$345 |
|
1185
PUT
Blackrock
BLK
$163B
| $164K | 0.01% |
448
+117
| +35% | +$42.9K |
|
1186
eHealth
EHTH
$43.8M
| $164K | 0.01% |
15,424
+11,268
| +271% | +$115K |
|
1187
PUT
Banco Santander
SAN
$194B
| $164K | 0.01% |
3,891
+2,473
| +174% | +$11.2K |
|
|
XYZ
1188
Block Inc
XYZ
$46.2B
| $164K | 0.01% |
+12,066
| New | +$150K |
|
|
SEMG
1189
CALL
DELISTED
SEMGROUP CORPORATION
SEMG
| $164K | 0.01% |
573
-162
| -22% | -$5.8K |
|
1190
PUT
eBay
EBAY
$48.3B
| $163K | 0.01% |
1,363
+701
| +106% | +$20.7K |
|
1191
CALL
PBF Energy
PBF
$7.32B
| $163K | 0.01% |
601
+497
| +478% | +$12.1K |
|
|
PTLA
1192
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $163K | 0.01% |
7,265
-2,051
| -22% | -$40.1K |
|
1193
Cytokinetics
CYTK
$11.1B
| $162K | 0.01% |
13,366
+499
| +4% | +$5.3K |
|
1194
PUT
FirstEnergy
FE
$28.7B
| $162K | 0.01% |
483
+100
| +26% | +$3.2K |
|
1195
Fortinet
FTNT
$112B
| $162K | 0.01% |
+26,920
| New | +$168K |
|
1196
PUT
Ralph Lauren
RL
$22.4B
| $162K | 0.01% |
266
+42
| +19% | +$4.27K |
|
1197
Comstock Resources
CRK
$4.02B
| $161K | 0.01% |
+16,398
| New | +$152K |
|
1198
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $161K | 0.01% |
4,070
-1,652
| -29% | -$74.7K |
|
1199
Nokia
NOK
$51.3B
| $161K | 0.01% |
33,635
+12,216
| +57% | +$57.6K |
|
1200
Alaunos Therapeutics
TCRT
$4.69M
| $161K | 0.01% |
201
+103
| +105% | +$92.8K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.