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 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3301
CALL
Box
BOX
$4.16B
| $14K | ﹤0.01% |
182
+48
| +36% | +$608 |
|
3302
BP
BP
$110B
| $14K | ﹤0.01% |
478
-193,459
| -100% | -$5.61M |
|
3303
CALL
Credit Acceptance
CACC
$5.93B
| $14K | ﹤0.01% |
+24
| New | +$4.69K |
|
3304
PUT
Cboe Global Markets
CBOE
$29.4B
| $14K | ﹤0.01% |
95
+29
| +44% | +$1.98K |
|
3305
PUT
Century Aluminum
CENX
$4.44B
| $14K | ﹤0.01% |
332
-119
| -26% | -$813 |
|
3306
CALL
Cognex
CGNX
$10.1B
| $14K | ﹤0.01% |
106
-14
| -12% | -$336 |
|
3307
CALL
Church & Dwight Co
CHD
$23.5B
| $14K | ﹤0.01% |
505
+151
| +43% | +$7.45K |
|
3308
PUT
Clearfield
CLFD
$419M
| $14K | ﹤0.01% |
300
+100
| +50% | +$1.85K |
|
3309
CALL
Dillards
DDS
$9.02B
| $14K | ﹤0.01% |
54
+23
| +74% | +$1.44K |
|
3310
PUT
Danaher
DHR
$136B
| $14K | ﹤0.01% |
81
-139
| -63% | -$9.85K |
|
|
TDAY
3311
USA Today Co
TDAY
$1.26B
| $14K | ﹤0.01% |
+936
| New | +$16.1K |
|
3312
CALL
Global Net Lease
GNL
$1.89B
| $14K | ﹤0.01% |
+15
| New | +$376 |
|
3313
CALL
Harmony Gold Mining
HMY
$9.83B
| $14K | ﹤0.01% |
1,287
+1,202
| +1,414% | +$4.91K |
|
3314
CALL
Kodak
KODK
$793M
| $14K | ﹤0.01% |
243
+174
| +252% | +$2.76K |
|
3315
CALL
Lands' End
LE
$376M
| $14K | ﹤0.01% |
255
-132
| -34% | -$2.19K |
|
3316
CALL
Lennox International
LII
$19.2B
| $14K | ﹤0.01% |
19
-23
| -55% | -$3.58K |
|
3317
CALL
LPL Financial
LPLA
$26.5B
| $14K | ﹤0.01% |
+226
| New | +$6.11K |
|
3318
PUT
La-Z-Boy
LZB
$1.62B
| $14K | ﹤0.01% |
26
-66
| -72% | -$1.86K |
|
3319
CALL
MGIC Investment
MTG
$6.34B
| $14K | ﹤0.01% |
521
+312
| +149% | +$2.32K |
|
3320
Natural Resource Partners
NRP
$1.29B
| $14K | ﹤0.01% |
+504
| New | +$11.3K |
|
|
3321
PUT
Natural Resource Partners
NRP
$1.29B
| $14K | ﹤0.01% |
194
+156
| +411% | +$3.49K |
|
|
ODP
3322
CALL
DELISTED
ODP
ODP
| $14K | ﹤0.01% |
98
+36
| +58% | +$1.28K |
|
3323
Performance Food Group
PFGC
$17.9B
| $14K | ﹤0.01% |
598
-3,778
| -86% | -$98.6K |
|
|
RDUS
3324
CALL
DELISTED
Radius Recycling
RDUS
| $14K | ﹤0.01% |
73
-212
| -74% | -$4.04K |
|
3325
PUT
SBA Communications
SBAC
$18.4B
| $14K | ﹤0.01% |
+98
| New | +$11.1K |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.