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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
KZ
1201
DELISTED
KongZhong Corporation
KZ
| $101K | 0.01% |
+13,766
| New | +$92.5K |
|
1202
Adobe
ADBE
$89.5B
| $100K | 0.01% |
+1,245
| New | +$97.1K |
|
1203
PUT
Allstate
ALL
$66.9B
| $100K | 0.01% |
230
+95
| +70% | +$6.51K |
|
1204
PUT
Danaher
DHR
$135B
| $100K | 0.01% |
353
+30
| +9% | +$1.72K |
|
1205
PUT
Lands' End
LE
$361M
| $100K | 0.01% |
56
+5
| +10% | +$144 |
|
1206
United Therapeutics
UTHR
$26.3B
| $100K | 0.01% |
578
+301
| +109% | +$54.1K |
|
|
TEN
1207
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $100K | 0.01% |
2,110
+1,953
| +1,244% | +$91.9K |
|
|
GNC
1208
DELISTED
GNC Holdings, Inc.
GNC
| $100K | 0.01% |
+2,263
| New | +$103K |
|
1209
Petrobras
PBR
$121B
| $99K | 0.01% |
+11,000
| New | +$98.5K |
|
1210
Range Resources
RRC
$9.11B
| $99K | 0.01% |
2,022
-8,739
| -81% | -$499K |
|
|
DATA
1211
CALL
DELISTED
Tableau Software, Inc.
DATA
| $99K | 0.01% |
601
+556
| +1,236% | +$60.1K |
|
1212
PUT
American Coastal Insurance
ACIC
$498M
| $98K | 0.01% |
90
+84
| +1,400% | +$1.45K |
|
1213
Automatic Data Processing
ADP
$100B
| $98K | 0.01% |
1,224
-1,383
| -53% | -$118K |
|
1214
CALL
Baxter International
BAX
$11.6B
| $98K | 0.01% |
784
-1,324
| -63% | -$49.5K |
|
|
ATCO
1215
PUT
DELISTED
Atlas Corp.
ATCO
| $98K | 0.01% |
231
-2
| -0.9% | -$39 |
|
|
NXTM
1216
DELISTED
NxStage Medical Inc.
NXTM
| $98K | 0.01% |
6,922
+3,970
| +134% | +$67.2K |
|
|
OA
1217
DELISTED
Orbital ATK, Inc.
OA
| $98K | 0.01% |
1,349
-3,651
| -73% | -$274K |
|
1218
iShares Core US Aggregate Bond ETF
AGG
$138B
| $97K | 0.01% |
+896
| New | +$98.6K |
|
1219
CALL
Qorvo
QRVO
$7.63B
| $97K | 0.01% |
235
+79
| +51% | +$6.12K |
|
|
RSPP
1220
DELISTED
RSP Permian, Inc.
RSPP
| $97K | 0.01% |
3,467
+616
| +22% | +$17.5K |
|
1221
PUT
BHP
BHP
$213B
| $96K | 0.01% |
157
-13
| -8% | -$525 |
|
1222
CALL
DuPont de Nemours
DD
$18.6B
| $96K | 0.01% |
245
+86
| +54% | +$11.1K |
|
1223
CALL
Lennar Class B
LEN.B
$20B
| $96K | 0.01% |
238
+170
| +250% | +$6.21K |
|
1224
PUT
Mattel
MAT
$4.17B
| $96K | 0.01% |
146
-15
| -9% | -$395 |
|
1225
NNN REIT
NNN
$9.39B
| $96K | 0.01% |
2,746
+2,005
| +271% | +$76.8K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.