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 | |
|---|---|---|---|---|---|---|
1276
PUT
HDFC Bank
HDB
$119B
| $2.18M | 0.01% |
764
+352
| +85% | +$10K |
|
1277
Johnson & Johnson
JNJ
$635B
| $2.18M | 0.01% |
+16,839
| New | +$2.22M |
|
1278
Home Depot
HD
$332B
| $2.17M | 0.01% |
9,372
+4,472
| +91% | +$978K |
|
|
GAP
1279
PUT
The Gap Inc
GAP
$6.84B
| $2.17M | 0.01% |
1,252
+619
| +98% | +$11K |
|
1280
CALL
ArcelorMittal
MT
$50.4B
| $2.16M | 0.01% |
1,520
+632
| +71% | +$9.71K |
|
1281
CALL
Vail Resorts
MTN
$5.19B
| $2.16M | 0.01% |
95
-88
| -48% | -$20.8K |
|
1282
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $2.16M | 0.01% |
140
-240
| -63% | -$35.5K |
|
|
WCG
1283
PUT
DELISTED
Wellcare Health Plans, Inc.
WCG
| $2.15M | 0.01% |
83
-165
| -67% | -$45.5K |
|
1284
PUT
Carnival Corporation Ltd
CCL
$36.1B
| $2.15M | 0.01% |
492
-629
| -56% | -$29K |
|
1285
CALL
Rockwell Automation
ROK
$51.4B
| $2.14M | 0.01% |
130
-224
| -63% | -$35.4K |
|
1286
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $2.14M | 0.01% |
274
-68
| -20% | -$5.46K |
|
1287
PUT
Keysight
KEYS
$54.5B
| $2.14M | 0.01% |
220
+26
| +13% | +$2.41K |
|
1288
CALL
TechnipFMC
FTI
$30.6B
| $2.14M | 0.01% |
1,191
+776
| +187% | +$14.5K |
|
1289
PUT
HealthEquity
HQY
$7.91B
| $2.14M | 0.01% |
374
+147
| +65% | +$9.76K |
|
1290
PUT
HubSpot
HUBS
$10.5B
| $2.14M | 0.01% |
141
-54
| -28% | -$9.7K |
|
1291
CALL
CoStar Group
CSGP
$11.3B
| $2.13M | 0.01% |
360
+330
| +1,100% | +$19.8K |
|
1292
Constellation Brands
STZ
$22.2B
| $2.13M | 0.01% |
10,293
-37,701
| -79% | -$7.57M |
|
|
ONCE
1293
PUT
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $2.13M | 0.01% |
220
-263
| -54% | -$26.3K |
|
1294
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $2.13M | 0.01% |
211
+125
| +145% | +$3.75K |
|
1295
PUT
Cboe Global Markets
CBOE
$29.8B
| $2.13M | 0.01% |
185
-75
| -29% | -$8.68K |
|
|
COHR
1296
PUT
DELISTED
Coherent Inc
COHR
| $2.12M | 0.01% |
138
-21
| -13% | -$3.04K |
|
1297
CALL
Ball Corp
BALL
$17B
| $2.11M | 0.01% |
290
-212
| -42% | -$15.8K |
|
|
DNKN
1298
CALL
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $2.1M | 0.01% |
265
+228
| +616% | +$18.5K |
|
1299
CALL
Iron Mountain
IRM
$38.2B
| $2.1M | 0.01% |
649
+36
| +6% | +$1.13K |
|
1300
PUT
Ingredion
INGR
$6.38B
| $2.1M | 0.01% |
257
-74
| -22% | -$5.87K |
|
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.