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 | |
|---|---|---|---|---|---|---|
3551
Gerdau
GGB
$9.48B
| $12K | ﹤0.01% |
4,832
-11,139
| -70% | -$30.4K |
|
3552
CALL
FerroAtlántica
GSM
$617M
| $12K | ﹤0.01% |
206
+94
| +84% | +$971 |
|
3553
CALL
W.W. Grainger
GWW
$66B
| $12K | ﹤0.01% |
55
+27
| +96% | +$6.02K |
|
3554
CALL
Hawaiian Electric Industries
HE
$2.28B
| $12K | ﹤0.01% |
45
-1
| -2% | -$30 |
|
3555
PUT
Helen of Troy
HELE
$658M
| $12K | ﹤0.01% |
61
+25
| +69% | +$2.09K |
|
3556
CALL
Hilton Worldwide
HLT
$75.3B
| $12K | ﹤0.01% |
24
+8
| +50% | +$588 |
|
3557
PUT
IMAX
IMAX
$2.47B
| $12K | ﹤0.01% |
92
+56
| +156% | +$1.75K |
|
3558
PUT
Immersion
IMMR
$256M
| $12K | ﹤0.01% |
+619
| New | +$5.84K |
|
3559
Ingredion
INGR
$6.4B
| $12K | ﹤0.01% |
97
-1,768
| -95% | -$223K |
|
3560
CALL
Inovio Pharmaceuticals
INO
$79.4M
| $12K | ﹤0.01% |
39
-22
| -36% | -$1.99K |
|
3561
PUT
KB Home
KBH
$3.53B
| $12K | ﹤0.01% |
298
-1,089
| -79% | -$17K |
|
3562
KBR
KBR
$4.67B
| $12K | ﹤0.01% |
+726
| New | +$11.6K |
|
3563
Lincoln Electric
LECO
$14.1B
| $12K | ﹤0.01% |
+161
| New | +$11.5K |
|
3564
PUT
Dorian LPG
LPG
$1.88B
| $12K | ﹤0.01% |
+85
| New | +$609 |
|
3565
CALL
Landstar System
LSTR
$6.5B
| $12K | ﹤0.01% |
+100
| New | +$7.77K |
|
3566
CALL
Medifast
MED
$110M
| $12K | ﹤0.01% |
25
+16
| +178% | +$644 |
|
3567
Meritage Homes
MTH
$4.89B
| $12K | ﹤0.01% |
718
-1,360
| -65% | -$23.5K |
|
|
NAK
3568
PUT
Northern Dynasty Minerals
NAK
$857M
| $12K | ﹤0.01% |
385
+137
| +55% | +$159 |
|
3569
NBT Bancorp
NBTB
$2.73B
| $12K | ﹤0.01% |
+287
| New | +$10.7K |
|
3570
CALL
Natural Gas Services Group
NGS
$469M
| $12K | ﹤0.01% |
37
+1
| +3% | +$27 |
|
3571
CALL
NMI Holdings
NMIH
$3.27B
| $12K | ﹤0.01% |
31
-172
| -85% | -$1.52K |
|
|
NOAH
3572
Noah Holdings
NOAH
$595M
| $12K | ﹤0.01% |
567
-1,530
| -73% | -$36.8K |
|
3573
CALL
Park Aerospace
PKE
$785M
| $12K | ﹤0.01% |
+111
| New | +$1.89K |
|
3574
PUT
Pinnacle West Capital
PNW
$12.8B
| $12K | ﹤0.01% |
+75
| New | +$5.62K |
|
3575
CALL
Rocket Pharmaceuticals
RCKT
$355M
| $12K | ﹤0.01% |
12
-1
| -8% | -$29 |
|
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.