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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TTM.RT
1026
PUT
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $289K | 0.01% |
1,322
+239
| +22% | +$52.2K |
|
1027
Alarm.com
ALRM
$2.5B
| $288K | 0.01% |
7,647
+5,713
| +295% | +$247K |
|
1028
Moody's
MCO
$82.5B
| $288K | 0.01% |
+1,952
| New | +$286K |
|
|
HTT
1029
High Templar Tech Ltd
HTT
$390M
| $288K | 0.01% |
+22,984
| New | +$443K |
|
|
RST
1030
DELISTED
ROSETTA STONE INC
RST
| $288K | 0.01% |
+23,133
| New | +$258K |
|
|
DPLO
1031
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $288K | 0.01% |
+14,387
| New | +$283K |
|
|
APTI
1032
CALL
DELISTED
Apptio, Inc. Class A Common Stock
APTI
| $288K | 0.01% |
706
+84
| +14% | +$1.79K |
|
1033
CALL
Delek US
DK
$3.97B
| $287K | 0.01% |
698
-141
| -17% | -$4.16K |
|
1034
ProShares Short VIX Short-Term Futures ETF
SVXY
$218M
| $287K | 0.01% |
+1,121
| New | +$248K |
|
1035
CALL
Cencora
COR
$59.4B
| $286K | 0.01% |
316
-100
| -24% | -$8.27K |
|
1036
Philips
PHG
$25.3B
| $286K | 0.01% |
9,995
-7,794
| -44% | -$235K |
|
1037
PUT
Wells Fargo
WFC
$261B
| $285K | 0.01% |
3,494
-453
| -11% | -$25.6K |
|
|
PXD
1038
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $284K | 0.01% |
747
+52
| +7% | +$8.01K |
|
|
AEGN
1039
DELISTED
Aegion Corp
AEGN
| $283K | 0.01% |
11,146
+10,980
| +6,614% | +$276K |
|
1040
PUT
T-Mobile US
TMUS
$184B
| $282K | 0.01% |
1,472
-582
| -28% | -$35.5K |
|
1041
Barclays
BCS
$93.3B
| $281K | 0.01% |
27,036
+16,034
| +146% | +$156K |
|
1042
Fidelity National Financial
FNF
$13.1B
| $281K | 0.01% |
+7,466
| New | +$272K |
|
1043
Immersion
IMMR
$218M
| $281K | 0.01% |
39,841
-2,706
| -6% | -$19.6K |
|
1044
CALL
McKesson
MCK
$96.5B
| $281K | 0.01% |
431
-210
| -33% | -$31.1K |
|
1045
Post Holdings
POST
$4.09B
| $281K | 0.01% |
+5,435
| New | +$289K |
|
|
CBL
1046
PUT
DELISTED
CBL& Associates Properties, Inc.
CBL
| $281K | 0.01% |
996
+939
| +1,647% | +$6.28K |
|
|
SHPG
1047
CALL
DELISTED
Shire pic
SHPG
| $281K | 0.01% |
250
+178
| +247% | +$26.4K |
|
1048
CALL
Huazhu Hotels Group
HTHT
$12.5B
| $280K | 0.01% |
476
+448
| +1,600% | +$14.2K |
|
1049
Ichor Holdings
ICHR
$3.28B
| $280K | 0.01% |
+11,388
| New | +$323K |
|
1050
Red Rock Resorts
RRR
$3.67B
| $280K | 0.01% |
8,311
+5,550
| +201% | +$155K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.