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 | |
|---|---|---|---|---|---|---|
1251
Honda
HMC
$36.5B
| $93K | 0.01% |
2,900
-2,261
| -44% | -$77K |
|
1252
Hyster-Yale Materials Handling
HY
$593M
| $93K | 0.01% |
1,354
+912
| +206% | +$66.4K |
|
1253
Nelnet
NNI
$4.79B
| $93K | 0.01% |
2,157
+1,836
| +572% | +$80.6K |
|
|
SNBR
1254
DELISTED
Sleep Number
SNBR
| $93K | 0.01% |
+3,121
| New | +$98.8K |
|
|
XNET
1255
Xunlei
XNET
$351M
| $93K | 0.01% |
7,792
+5,250
| +207% | +$51K |
|
|
VALE.P
1256
PUT
DELISTED
Vale S A
VALE.P
| $93K | 0.01% |
209
+86
| +70% | +$481 |
|
1257
PUT
Eli Lilly
LLY
$1.07T
| $92K | 0.01% |
667
+446
| +202% | +$34K |
|
1258
CALL
Las Vegas Sands
LVS
$30.5B
| $92K | 0.01% |
572
-324
| -36% | -$17.3K |
|
|
OVTI
1259
PUT
DELISTED
OMNIVISION TECHNOLOGIES INC
OVTI
| $92K | 0.01% |
553
+451
| +442% | +$12.1K |
|
|
BDSI
1260
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $92K | 0.01% |
11,673
-1,601
| -12% | -$13.8K |
|
|
GRFS
1261
PUT
Grifois
GRFS
$5.16B
| $91K | 0.01% |
372
+360
| +3,000% | +$5.84K |
|
1262
PUT
Honeywell
HON
$77B
| $91K | 0.01% |
267
+43
| +19% | +$4.01K |
|
1263
Open Text
OTEX
$5.43B
| $91K | 0.01% |
4,536
+3,252
| +253% | +$78.4K |
|
1264
CALL
Prothena Corp
PRTA
$458M
| $91K | 0.01% |
67
+48
| +253% | +$1.89K |
|
|
TOUR
1265
Tuniu
TOUR
$55.4M
| $91K | 0.01% |
+510
| New | +$87.9K |
|
|
PDCE
1266
CALL
DELISTED
PDC Energy, Inc.
PDCE
| $91K | 0.01% |
256
+225
| +726% | +$12.7K |
|
1267
PUT
Copa Holdings
CPA
$5.56B
| $90K | 0.01% |
43
-63
| -59% | -$6.01K |
|
1268
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $90K | 0.01% |
1,458
-324
| -18% | -$12.2K |
|
1269
Equity Residential
EQR
$25.4B
| $90K | 0.01% |
1,291
-2,172
| -63% | -$161K |
|
1270
iShares MSCI Germany ETF
EWG
$1.5B
| $90K | 0.01% |
+3,242
| New | +$96.3K |
|
|
GES
1271
CALL
DELISTED
Guess Inc
GES
| $90K | 0.01% |
201
+1
| +0.5% | +$19 |
|
1272
J.M. Smucker
SJM
$12.6B
| $90K | 0.01% |
+832
| New | +$96.3K |
|
1273
CALL
Union Pacific
UNP
$182B
| $90K | 0.01% |
1,148
-275
| -19% | -$28.7K |
|
|
VIVS
1274
PUT
VivoSim Labs
VIVS
$1.46M
| $90K | 0.01% |
2
| – | – |
|
|
ADXS
1275
CALL
DELISTED
Advaxis Inc
ADXS
| $90K | 0.01% |
8
-6
| -43% | -$1.9K |
|
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.