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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1301
PUT
Molson Coors Class B
TAP
$7.68B
| $2.47M | 0.01% |
458
-48
| -9% | -$2.58K |
|
|
AZPN
1302
PUT
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $2.47M | 0.01% |
204
+5
| +3% | +$60.4K |
|
1303
PUT
Penumbra
PEN
$12.5B
| $2.46M | 0.01% |
150
-351
| -70% | -$55.8K |
|
1304
CALL
IQVIA
IQV
$34.7B
| $2.46M | 0.01% |
159
-120
| -43% | -$17.5K |
|
1305
CALL
Independent Bank Corp
IBCP
$776M
| $2.46M | 0.01% |
1,084
+755
| +229% | +$16.7K |
|
1306
CrowdStrike
CRWD
$187B
| $2.45M | 0.01% |
196,684
+100,324
| +104% | +$1.32M |
|
1307
CALL
Waste Management
WM
$95.9B
| $2.45M | 0.01% |
215
+99
| +85% | +$11.2K |
|
|
ATH
1308
PUT
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $2.44M | 0.01% |
520
+475
| +1,056% | +$20.6K |
|
1309
CALL
Crane NXT
CXT
$3.04B
| $2.44M | 0.01% |
815
+783
| +2,447% | +$22.3K |
|
1310
CALL
Genuine Parts
GPC
$17.1B
| $2.44M | 0.01% |
230
-324
| -58% | -$33.3K |
|
|
HEP
1311
PUT
DELISTED
Holly Energy Partners, L.P.
HEP
| $2.44M | 0.01% |
1,101
+932
| +551% | +$21.2K |
|
1312
Vanguard Dividend Appreciation ETF
VIG
$111B
| $2.44M | 0.01% |
+19,551
| New | +$2.37M |
|
1313
CALL
American Water Works
AWK
$26.3B
| $2.43M | 0.01% |
198
-42
| -18% | -$5.09K |
|
1314
CALL
MSCI
MSCI
$40B
| $2.43M | 0.01% |
94
-47
| -33% | -$11.5K |
|
|
SNV
1315
CALL
DELISTED
Synovus
SNV
| $2.43M | 0.01% |
619
+173
| +39% | +$6.36K |
|
1316
CALL
Repligen
RGEN
$7.44B
| $2.42M | 0.01% |
262
-99
| -27% | -$8.32K |
|
1317
CALL
Ally Financial
ALLY
$13.1B
| $2.42M | 0.01% |
792
+427
| +117% | +$13.3K |
|
1318
CALL
Harley-Davidson
HOG
$2.68B
| $2.42M | 0.01% |
650
+161
| +33% | +$5.99K |
|
|
PPLI
1319
CALL
People Inc
PPLI
$3.1B
| $2.42M | 0.01% |
543
-162
| -23% | -$6.53K |
|
1320
AB InBev
BUD
$158B
| $2.42M | 0.01% |
29,445
+5,678
| +24% | +$473K |
|
|
DNKN
1321
CALL
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $2.41M | 0.01% |
319
+54
| +20% | +$4.08K |
|
1322
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $2.41M | 0.01% |
996
+877
| +737% | +$19.1K |
|
|
LKFT
1323
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $2.4M | 0.01% |
11,620
+11,584
| +32,178% | +$2.14M |
|
|
RAD
1324
PUT
DELISTED
Rite Aid Corporation
RAD
| $2.4M | 0.01% |
1,552
+556
| +56% | +$5.44K |
|
1325
PUT
Newell Brands
NWL
$2.16B
| $2.4M | 0.01% |
1,247
-351
| -22% | -$6.76K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.