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 | |
|---|---|---|---|---|---|---|
476
CALL
FedEx
FDX
$76.6B
| $575K | 0.03% |
1,228
-374
| -23% | -$68.6K |
|
477
CALL
3M
MMM
$89.1B
| $574K | 0.03% |
2,152
+755
| +54% | +$109K |
|
|
FNSR
478
DELISTED
Finisar Corp
FNSR
| $574K | 0.03% |
18,986
-10,997
| -37% | -$338K |
|
479
CALL
Citizens Financial Group
CFG
$30.6B
| $573K | 0.03% |
725
+609
| +525% | +$18.5K |
|
480
PUT
Synaptics
SYNA
$4.71B
| $572K | 0.03% |
798
+88
| +12% | +$5.09K |
|
481
Unisys
UIS
$248M
| $572K | 0.03% |
38,321
+32,657
| +577% | +$415K |
|
482
PUT
Costco
COST
$411B
| $571K | 0.03% |
2,084
-3,528
| -63% | -$539K |
|
483
Banco Santander
SAN
$197B
| $571K | 0.03% |
115,028
+69,734
| +154% | +$317K |
|
484
PUT
Micron Technology
MU
$1.08T
| $570K | 0.03% |
4,675
+1,642
| +54% | +$30.8K |
|
485
iShares MSCI Turkey ETF
TUR
$209M
| $569K | 0.03% |
+17,543
| New | +$607K |
|
486
CALL
Freeport-McMoran
FCX
$93.4B
| $567K | 0.03% |
4,248
+2,229
| +110% | +$28.5K |
|
487
CALL
Western Digital
WDC
$192B
| $565K | 0.03% |
1,707
-1,984
| -54% | -$91.5K |
|
488
PUT
General Motors
GM
$74.1B
| $562K | 0.03% |
3,935
+2,770
| +238% | +$93.1K |
|
489
CALL
SLB Ltd
SLB
$71.3B
| $562K | 0.03% |
2,517
-985
| -28% | -$80.7K |
|
490
Unilever
UL
$133B
| $562K | 0.03% |
+12,284
| New | +$573K |
|
491
Broadridge
BR
$16.7B
| $561K | 0.03% |
8,467
+6,675
| +372% | +$434K |
|
492
PUT
MannKind Corp
MNKD
$1.19B
| $561K | 0.03% |
224
-34
| -13% | -$98 |
|
493
ON Semiconductor
ON
$35.9B
| $561K | 0.03% |
43,998
-37,072
| -46% | -$442K |
|
494
Prudential
PUK
$36.5B
| $557K | 0.03% |
14,448
+7,967
| +123% | +$286K |
|
495
CALL
Marathon Petroleum
MPC
$92.2B
| $556K | 0.03% |
1,707
+1,063
| +165% | +$48.3K |
|
496
PUT
McKesson
MCK
$95.3B
| $555K | 0.03% |
325
+9
| +3% | +$1.32K |
|
|
TWTR
497
CALL
DELISTED
Twitter, Inc.
TWTR
| $555K | 0.03% |
9,050
-11,248
| -55% | -$206K |
|
498
PUT
Bristol-Myers Squibb
BMY
$124B
| $552K | 0.03% |
3,298
-1,571
| -32% | -$85.9K |
|
499
CALL
Cleveland-Cliffs
CLF
$5.39B
| $552K | 0.03% |
2,838
+858
| +43% | +$6.46K |
|
|
CLVS
500
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $552K | 0.03% |
651
-137
| -17% | -$4.82K |
|
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.