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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1151
Infosys
INFY
$43.2B
| $139K | 0.01% |
14,640
-85,796
| -85% | -$734K |
|
1152
PUT
Southwest Airlines
LUV
$21.9B
| $139K | 0.01% |
403
-675
| -63% | -$24.9K |
|
1153
PUT
NetEase
NTES
$76.9B
| $139K | 0.01% |
2,080
+1,325
| +175% | +$34.1K |
|
1154
Papa John's
PZZA
$999M
| $139K | 0.01% |
+2,038
| New | +$147K |
|
1155
Urban Outfitters
URBN
$5.96B
| $139K | 0.01% |
4,748
-1,617
| -25% | -$52K |
|
|
RPRX
1156
DELISTED
Repros Therapeutics Inc.
RPRX
| $139K | 0.01% |
+18,831
| New | +$144K |
|
1157
ANI Pharmaceuticals
ANIP
$1.79B
| $138K | 0.01% |
+3,514
| New | +$200K |
|
1158
PUT
Apollo Global Management
APO
$68.6B
| $138K | 0.01% |
262
+101
| +63% | +$2.01K |
|
1159
PUT
DexCom
DXCM
$27.2B
| $138K | 0.01% |
1,176
+912
| +345% | +$20.3K |
|
1160
PUT
Ralph Lauren
RL
$22.1B
| $138K | 0.01% |
179
-135
| -43% | -$16K |
|
1161
CALL
Vipshop
VIPS
$6.92B
| $138K | 0.01% |
860
-97
| -10% | -$1.86K |
|
|
SHLD
1162
CALL
DELISTED
Sears Holding Corporation
SHLD
| $138K | 0.01% |
622
+143
| +30% | +$3.45K |
|
|
CAVM
1163
CALL
DELISTED
Cavium, Inc.
CAVM
| $138K | 0.01% |
131
+65
| +98% | +$4.33K |
|
|
ACAS
1164
DELISTED
American Capital Ltd
ACAS
| $138K | 0.01% |
11,350
+11,334
| +70,838% | +$152K |
|
1165
PUT
Costco
COST
$411B
| $137K | 0.01% |
731
+62
| +9% | +$8.85K |
|
1166
CALL
HCA Healthcare
HCA
$83.5B
| $137K | 0.01% |
256
-475
| -65% | -$42.1K |
|
|
CBM
1167
DELISTED
Cambrex Corporation
CBM
| $137K | 0.01% |
3,467
-2,857
| -45% | -$134K |
|
|
CUDA
1168
DELISTED
Barracuda Networks, Inc.
CUDA
| $137K | 0.01% |
8,804
+8,576
| +3,761% | +$241K |
|
|
HAR
1169
DELISTED
Harman International Industries
HAR
| $137K | 0.01% |
1,432
-1,622
| -53% | -$170K |
|
1170
PUT
Credit Acceptance
CACC
$6.2B
| $136K | 0.01% |
297
+272
| +1,088% | +$59.6K |
|
1171
PTC Therapeutics
PTCT
$6.51B
| $136K | 0.01% |
+5,112
| New | +$219K |
|
1172
PUT
United Parcel Service
UPS
$97B
| $136K | 0.01% |
902
+430
| +91% | +$42.5K |
|
1173
CALL
Danaher
DHR
$135B
| $135K | 0.01% |
342
-484
| -59% | -$28.6K |
|
1174
Genesis Energy
GEL
$1.85B
| $135K | 0.01% |
+3,530
| New | +$152K |
|
1175
Ovintiv
OVV
$17.3B
| $135K | 0.01% |
4,203
+3,968
| +1,689% | +$152K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.