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 | |
|---|---|---|---|---|---|---|
276
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $1.02M | 0.06% |
+9,772
| New | +$1.05M |
|
277
CALL
Home Depot
HD
$331B
| $1.02M | 0.06% |
2,558
-52
| -2% | -$6.7K |
|
|
ALXN
278
DELISTED
Alexion Pharmaceuticals
ALXN
| $1.01M | 0.06% |
8,299
-8,720
| -51% | -$1.07M |
|
279
AGNC Investment
AGNC
$12.3B
| $997K | 0.06% |
55,009
+42,239
| +331% | +$800K |
|
280
PUT
Advanced Micro Devices
AMD
$907B
| $991K | 0.06% |
10,635
+6,927
| +187% | +$58.1K |
|
281
CALL
EOG Resources
EOG
$76.9B
| $987K | 0.06% |
1,198
-866
| -42% | -$84.3K |
|
|
XLNX
282
CALL
DELISTED
Xilinx Inc
XLNX
| $987K | 0.06% |
1,847
-35
| -2% | -$1.88K |
|
|
AKS
283
CALL
DELISTED
AK Steel Holding Corp
AKS
| $978K | 0.06% |
3,945
+3,397
| +620% | +$25.8K |
|
|
RICE
284
DELISTED
Rice Energy Inc.
RICE
| $978K | 0.06% |
45,820
+38,268
| +507% | +$912K |
|
285
Alkermes
ALKS
$8.8B
| $965K | 0.06% |
17,367
-3,666
| -17% | -$196K |
|
286
EQT Corp
EQT
$33.8B
| $963K | 0.06% |
27,066
+15,337
| +131% | +$570K |
|
287
Radware
RDWR
$1.23B
| $962K | 0.06% |
66,042
-27,238
| -29% | -$362K |
|
288
PUT
Palo Alto Networks
PANW
$272B
| $959K | 0.06% |
12,312
+8,790
| +250% | +$211K |
|
289
Fomento Económico Mexicano
FMX
$44.6B
| $956K | 0.06% |
12,553
+8,439
| +205% | +$723K |
|
290
GSK
GSK
$102B
| $955K | 0.06% |
+19,855
| New | +$981K |
|
291
Direxion Daily Gold Miners Index Bear 2X ETF
DUST
$70M
| $952K | 0.06% |
+8
| New | +$983K |
|
292
CALL
Caterpillar
CAT
$412B
| $948K | 0.06% |
2,669
-952
| -26% | -$86.3K |
|
293
Franklin Covey
FC
$240M
| $947K | 0.06% |
47,046
+11,870
| +34% | +$232K |
|
|
BRCD
294
DELISTED
Brocade Communications Systems, Inc. NEW
BRCD
| $930K | 0.06% |
74,481
+70,019
| +1,569% | +$788K |
|
295
Trinity Industries
TRN
$2.83B
| $928K | 0.06% |
+46,470
| New | +$856K |
|
|
TYNS
296
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $922K | 0.06% |
3,072
+1,020
| +50% | +$28.9K |
|
|
MOMO
297
Hello Group
MOMO
$879M
| $919K | 0.05% |
50,027
+35,718
| +250% | +$788K |
|
298
Vodafone
VOD
$35.7B
| $914K | 0.05% |
37,422
-31,420
| -46% | -$827K |
|
299
Honeywell
HON
$73.5B
| $913K | 0.05% |
8,725
+1,202
| +16% | +$122K |
|
300
AGCO
AGCO
$8.51B
| $911K | 0.05% |
+15,753
| New | +$851K |
|
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.