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 | |
|---|---|---|---|---|---|---|
1051
Oneok
OKE
$58.7B
| $164K | 0.01% |
5,121
-1,217
| -19% | -$44.4K |
|
1052
United Natural Foods
UNFI
$2.94B
| $164K | 0.01% |
3,396
+3,094
| +1,025% | +$159K |
|
1053
CALL
Viatris
VTRS
$20.1B
| $164K | 0.01% |
3,025
-1,234
| -29% | -$68.8K |
|
1054
Dentsply Sirona
XRAY
$2.55B
| $164K | 0.01% |
3,258
+2,121
| +187% | +$113K |
|
|
PXD
1055
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $164K | 0.01% |
1,202
+504
| +72% | +$62.8K |
|
|
YOKU
1056
DELISTED
YOUKU TUDOU INC.(CAYMAN ISLS)
YOKU
| $164K | 0.01% |
9,337
-23,250
| -71% | -$430K |
|
|
ASNA
1057
CALL
DELISTED
Ascena Retail Group, Inc.
ASNA
| $163K | 0.01% |
50
+44
| +733% | +$11.5K |
|
1058
EQT Corp
EQT
$33.4B
| $162K | 0.01% |
+4,620
| New | +$188K |
|
1059
PUT
Zimmer Biomet
ZBH
$17.3B
| $162K | 0.01% |
97
+52
| +116% | +$5.21K |
|
|
ACI
1060
PUT
DELISTED
ARCH COAL, INC.
ACI
| $162K | 0.01% |
+534
| New | +$1.75K |
|
|
CYBR
1061
PUT
DELISTED
CyberArk
CYBR
| $161K | 0.01% |
291
+64
| +28% | +$3.5K |
|
1062
CALL
Lowe's Companies
LOW
$113B
| $161K | 0.01% |
392
+118
| +43% | +$8.12K |
|
1063
Vicor
VICR
$10.5B
| $161K | 0.01% |
+15,800
| New | +$164K |
|
1064
ProShares VIX Mid-Term Futures ETF
VIXM
$40.1M
| $161K | 0.01% |
2,551
+127
| +5% | +$7.15K |
|
1065
Deluxe
DLX
$1.17B
| $160K | 0.01% |
2,877
+2,517
| +699% | +$152K |
|
1066
PUT
Expedia Group
EXPE
$30.9B
| $160K | 0.01% |
637
+231
| +57% | +$26.6K |
|
1067
PUT
Honeywell
HON
$78B
| $160K | 0.01% |
702
+435
| +163% | +$39.6K |
|
1068
American Financial Group
AFG
$11.7B
| $159K | 0.01% |
+2,318
| New | +$160K |
|
|
ABMD
1069
DELISTED
Abiomed Inc
ABMD
| $159K | 0.01% |
+1,718
| New | +$151K |
|
1070
Aflac
AFL
$63.3B
| $158K | 0.01% |
5,454
-3,398
| -38% | -$103K |
|
|
CMCM
1071
PUT
Cheetah Mobile
CMCM
$89.4M
| $158K | 0.01% |
98
+50
| +104% | +$5.36K |
|
1072
PUT
Elevance Health
ELV
$82.3B
| $158K | 0.01% |
301
+9
| +3% | +$1.35K |
|
1073
PUT
HSBC
HSBC
$349B
| $158K | 0.01% |
473
+211
| +81% | +$7.89K |
|
1074
CALL
United States Oil Fund
USO
$2.5B
| $158K | 0.01% |
147
+49
| +50% | +$6.02K |
|
1075
CALL
Vanguard S&P 500 ETF
VOO
$967B
| $158K | 0.01% |
1,319
+1,005
| +320% | +$187K |
|
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.