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 | |
|---|---|---|---|---|---|---|
4376
PUT
Paychex
PAYX
$43.4B
| $5K | ﹤0.01% |
49
-257
| -84% | -$14.8K |
|
4377
iShares MSCI Global Metals & Mining Producers ETF
PICK
$2.16B
| $5K | ﹤0.01% |
207
-366
| -64% | -$9.29K |
|
4378
CALL
Prothena Corp
PRTA
$448M
| $5K | ﹤0.01% |
205
-42
| -17% | -$2.32K |
|
4379
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $5K | ﹤0.01% |
796
-316
| -28% | -$13.2K |
|
4380
Dr. Reddy's Laboratories
RDY
$9.8B
| $5K | ﹤0.01% |
635
-2,800
| -82% | -$26.1K |
|
4381
CALL
RPM International
RPM
$13.8B
| $5K | ﹤0.01% |
33
-9
| -21% | -$461 |
|
4382
CALL
Safety Insurance
SAFT
$1.51B
| $5K | ﹤0.01% |
12
-28
| -70% | -$1.96K |
|
4383
CALL
Saia
SAIA
$10.5B
| $5K | ﹤0.01% |
+20
| New | +$773 |
|
|
ECHO
4384
PUT
EchoStar
ECHO
$24.3B
| $5K | ﹤0.01% |
+22
| New | +$874 |
|
4385
CALL
Sabesp
SBS
$18.4B
| $5K | ﹤0.01% |
2,284
+876
| +62% | +$1.54K |
|
4386
PUT
Sprouts Farmers Market
SFM
$7.44B
| $5K | ﹤0.01% |
27
-295
| -92% | -$6.2K |
|
4387
PUT
ScottsMiracle-Gro
SMG
$4.09B
| $5K | ﹤0.01% |
+59
| New | +$5.29K |
|
4388
PUT
Snap-on
SNA
$21.5B
| $5K | ﹤0.01% |
30
+10
| +50% | +$1.63K |
|
4389
PUT
Smith & Nephew
SNN
$13.7B
| $5K | ﹤0.01% |
154
-581
| -79% | -$17.1K |
|
4390
CALL
Sony
SONY
$137B
| $5K | ﹤0.01% |
695
-850
| -55% | -$5.17K |
|
4391
CALL
S&P Global
SPGI
$124B
| $5K | ﹤0.01% |
61
-47
| -44% | -$5.62K |
|
4392
Scully Royalty
SRL
$75.4M
| $5K | ﹤0.01% |
524
-140
| -21% | -$1.43K |
|
4393
PUT
Stryker
SYK
$135B
| $5K | ﹤0.01% |
377
+13
| +4% | +$1.5K |
|
4394
Telephone and Data Systems
TDS
$3.87B
| $5K | ﹤0.01% |
198
-2,699
| -93% | -$73.6K |
|
4395
PUT
Tilly's
TLYS
$114M
| $5K | ﹤0.01% |
+18
| New | +$201 |
|
4396
PUT
Travel + Leisure Co
TNL
$4.76B
| $5K | ﹤0.01% |
128
-36
| -22% | -$1.16K |
|
4397
PUT
TSMC
TSM
$1.94T
| $5K | ﹤0.01% |
126
+4
| +3% | +$120 |
|
4398
Universal Electronics
UEIC
$59.2M
| $5K | ﹤0.01% |
+86
| New | +$5.84K |
|
4399
PUT
Unum
UNM
$13.4B
| $5K | ﹤0.01% |
53
-35
| -40% | -$1.4K |
|
4400
CALL
US Foods
USFD
$22.5B
| $5K | ﹤0.01% |
+85
| New | +$2.04K |
|
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.