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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
551
CALL
Corning
GLW
$133B
| $494K | 0.03% |
1,077
+985
| +1,071% | +$23.4K |
|
552
PUT
Simon Property Group
SPG
$73.4B
| $494K | 0.03% |
716
+33
| +5% | +$6.13K |
|
553
Waters Corp
WAT
$36.4B
| $494K | 0.03% |
+3,680
| New | +$525K |
|
|
CRC
554
CALL
DELISTED
California Resources Corporation
CRC
| $494K | 0.03% |
960
-22
| -2% | -$322 |
|
555
Post Holdings
POST
$4.12B
| $493K | 0.03% |
9,374
-7,634
| -45% | -$386K |
|
|
ARRS
556
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $493K | 0.03% |
16,384
+9,789
| +148% | +$284K |
|
|
ESRX
557
PUT
DELISTED
Express Scripts Holding Company
ESRX
| $489K | 0.03% |
1,243
-380
| -23% | -$27.2K |
|
558
CALL
Costco
COST
$411B
| $487K | 0.03% |
580
-803
| -58% | -$123K |
|
|
OCLR
559
DELISTED
Oclaro Inc.
OCLR
| $487K | 0.03% |
+54,489
| New | +$471K |
|
560
MGM Resorts International
MGM
$11.6B
| $486K | 0.03% |
+16,864
| New | +$467K |
|
|
RP
561
DELISTED
RealPage, Inc.
RP
| $484K | 0.03% |
16,161
+9,134
| +130% | +$255K |
|
562
PUT
Cisco
CSCO
$442B
| $483K | 0.03% |
2,041
-1,663
| -45% | -$50.7K |
|
563
CALL
Transocean
RIG
$5.87B
| $483K | 0.03% |
2,870
+277
| +11% | +$3.28K |
|
|
HCR
564
CALL
DELISTED
Hi-Crush Inc. Common Stock
HCR
| $483K | 0.03% |
490
-122
| -20% | -$2.13K |
|
565
Globus Medical
GMED
$10.2B
| $481K | 0.03% |
19,415
+9,583
| +97% | +$218K |
|
566
Goodyear
GT
$2.14B
| $480K | 0.03% |
+15,579
| New | +$482K |
|
567
PUT
Illumina
ILMN
$28.9B
| $480K | 0.03% |
752
-76
| -9% | -$10.2K |
|
|
ACOR
568
PUT
DELISTED
Acorda Therapeutics
ACOR
| $480K | 0.03% |
9
+4
| +80% | +$9.51K |
|
569
Papa John's
PZZA
$1.05B
| $479K | 0.03% |
5,603
+4,742
| +551% | +$393K |
|
|
EMBJ
570
Embraer S.A. ADS
EMBJ
$11.8B
| $478K | 0.03% |
+24,859
| New | +$485K |
|
|
FIT
571
PUT
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $477K | 0.03% |
1,331
-405
| -23% | -$4.15K |
|
|
ARIA
572
DELISTED
Ariad Pharmaceuticals Inc
ARIA
| $477K | 0.03% |
38,420
-55,273
| -59% | -$666K |
|
573
CALL
Children's Place
PLCE
$60.3M
| $475K | 0.03% |
275
-75
| -21% | -$6.76K |
|
574
Weyerhaeuser
WY
$17.2B
| $475K | 0.03% |
+15,800
| New | +$487K |
|
575
Silicon Motion
SIMO
$9.55B
| $474K | 0.03% |
+11,166
| New | +$510K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.