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 | |
|---|---|---|---|---|---|---|
1376
Vanguard Consumer Staples ETF
VDC
$7.86B
| $105K | 0.01% |
871
-458
| -34% | -$58.1K |
|
1377
PUT
WEX
WEX
$6.11B
| $105K | 0.01% |
40
-10
| -20% | -$996 |
|
|
CEMP
1378
PUT
DELISTED
Cempra, Inc.
CEMP
| $105K | 0.01% |
143
+1
| +0.7% | +$37 |
|
|
KATE
1379
DELISTED
Kate Spade & Company
KATE
| $105K | 0.01% |
+5,546
| New | +$111K |
|
|
BEAT
1380
DELISTED
BioTelemetry, Inc.
BEAT
| $105K | 0.01% |
8,594
+8,041
| +1,454% | +$103K |
|
1381
PUT
Canadian Natural Resources
CNQ
$96.9B
| $104K | 0.01% |
209
+139
| +199% | +$1.53K |
|
1382
PUT
Constellium
CSTM
$3.96B
| $104K | 0.01% |
146
+31
| +27% | +$258 |
|
1383
Guidewire Software
GWRE
$11.5B
| $104K | 0.01% |
1,987
-839
| -30% | -$46.4K |
|
1384
PUT
Kohl's
KSS
$2.03B
| $104K | 0.01% |
129
+31
| +32% | +$1.74K |
|
1385
PUT
Unisys
UIS
$227M
| $104K | 0.01% |
115
+89
| +342% | +$1.37K |
|
1386
CALL
Worthington Enterprises
WOR
$2.76B
| $104K | 0.01% |
644
+639
| +12,780% | +$10.4K |
|
|
ANFI
1387
DELISTED
AMIRA NATURE FOODS LTD
ANFI
| $104K | 0.01% |
18,856
+15,130
| +406% | +$119K |
|
|
CVC
1388
PUT
DELISTED
CABLEVISION SYS CP NY GRP CL-A
CVC
| $104K | 0.01% |
+965
| New | +$26.3K |
|
|
TW
1389
DELISTED
TOWERS WATSON & CO COM STK CL A (DE)
TW
| $104K | 0.01% |
894
-1,687
| -65% | -$209K |
|
|
AMED
1390
DELISTED
Amedisys
AMED
| $103K | 0.01% |
2,737
-1,479
| -35% | -$62.4K |
|
1391
PUT
Fossil Group
FOSL
$239M
| $103K | 0.01% |
47
-21
| -31% | -$1.33K |
|
1392
PUT
Kraft Heinz
KHC
$30.4B
| $103K | 0.01% |
+329
| New | +$24.8K |
|
1393
PUT
Nucor
NUE
$56.4B
| $103K | 0.01% |
181
+43
| +31% | +$1.84K |
|
1394
Wheaton Precious Metals
WPM
$50.6B
| $103K | 0.01% |
8,601
-5,707
| -40% | -$74.5K |
|
|
QLTI
1395
DELISTED
QLT Inc
QLTI
| $103K | 0.01% |
38,799
+3,916
| +11% | +$14.4K |
|
|
HIBB
1396
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $103K | 0.01% |
2,961
+1,545
| +109% | +$64.5K |
|
1397
Acuity Brands
AYI
$9.88B
| $102K | 0.01% |
+583
| New | +$113K |
|
1398
Manhattan Associates
MANH
$8.97B
| $102K | 0.01% |
+1,648
| New | +$103K |
|
1399
CALL
Target
TGT
$62.1B
| $102K | 0.01% |
584
+440
| +306% | +$35.1K |
|
|
CRZO
1400
DELISTED
Carrizo Oil & Gas Inc
CRZO
| $102K | 0.01% |
3,369
-2,582
| -43% | -$93.6K |
|
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.