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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TCF
1301
PUT
DELISTED
TCF Financial Corporation Common Stock
TCF
| $2.1M | 0.01% |
552
+523
| +1,803% | +$20.8K |
|
1302
PUT
Apollo Global Management
APO
$70.7B
| $2.1M | 0.01% |
555
+266
| +92% | +$9.68K |
|
1303
PUT
LGI Homes
LGIH
$1.4B
| $2.1M | 0.01% |
252
+204
| +425% | +$15.6K |
|
1304
CALL
STMicroelectronics
STM
$46B
| $2.1M | 0.01% |
1,084
-116
| -10% | -$2.13K |
|
1305
CALL
First Majestic Silver
AG
$8.05B
| $2.09M | 0.01% |
2,303
+1,128
| +96% | +$11K |
|
1306
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
$351M
| $2.09M | 0.01% |
3,661
+2,318
| +173% | +$1.77M |
|
1307
PUT
Devon Energy
DVN
$51.9B
| $2.09M | 0.01% |
867
+206
| +31% | +$5.16K |
|
|
CRC
1308
CALL
DELISTED
California Resources Corporation
CRC
| $2.08M | 0.01% |
2,044
+1,118
| +121% | +$14.3K |
|
1309
CALL
Clorox
CLX
$11.6B
| $2.08M | 0.01% |
137
-111
| -45% | -$17.5K |
|
1310
CALL
Liberty Latin America Class C
LILAK
$1.5B
| $2.08M | 0.01% |
1,422
+943
| +197% | +$13.6K |
|
|
BERY
1311
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $2.08M | 0.01% |
576
+210
| +57% | +$8.58K |
|
1312
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.24B
| $2.07M | 0.01% |
19,080
+6,224
| +48% | +$675K |
|
1313
PUT
Baker Hughes
BKR
$56.8B
| $2.07M | 0.01% |
893
+469
| +111% | +$11K |
|
1314
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $2.06M | 0.01% |
574
+276
| +93% | +$8.37K |
|
1315
ProShares Ultra S&P500
SSO
$7.82B
| $2.06M | 0.01% |
128,584
+127,008
| +8,059% | +$2.02M |
|
1316
PUT
Aflac
AFL
$63.9B
| $2.06M | 0.01% |
394
+297
| +306% | +$15.7K |
|
1317
PUT
Hormel Foods
HRL
$13.9B
| $2.06M | 0.01% |
471
-701
| -60% | -$29.4K |
|
1318
PUT
Royal Gold
RGLD
$17.1B
| $2.06M | 0.01% |
167
+26
| +18% | +$3.17K |
|
1319
PUT
Lumen
LUMN
$6.53B
| $2.06M | 0.01% |
1,647
-4,743
| -74% | -$56.3K |
|
1320
PUT
Mattel
MAT
$4.17B
| $2.06M | 0.01% |
1,805
+1,011
| +127% | +$11.6K |
|
1321
CALL
ZTO Express
ZTO
$18.2B
| $2.05M | 0.01% |
961
+725
| +307% | +$14.6K |
|
1322
CALL
Cleveland-Cliffs
CLF
$6.81B
| $2.04M | 0.01% |
2,821
+1,402
| +99% | +$12.6K |
|
1323
PUT
Vodafone
VOD
$34.9B
| $2.03M | 0.01% |
1,022
-435
| -30% | -$7.88K |
|
1324
CALL
Analog Devices
ADI
$181B
| $2.03M | 0.01% |
182
-23
| -11% | -$2.6K |
|
|
WCN
1325
CALL
Waste Connections
WCN
$42.8B
| $2.03M | 0.01% |
221
+122
| +123% | +$11.3K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.