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 | |
|---|---|---|---|---|---|---|
701
PUT
HEICO Corp Class A
HEI.A
$35.2B
| $5.18M | 0.01% |
415
+409
| +6,817% | +$43.3K |
|
702
CALL
Zillow
Z
$7.08B
| $5.17M | 0.01% |
1,736
+495
| +40% | +$19.7K |
|
703
CALL
Hexcel
HXL
$8.29B
| $5.15M | 0.01% |
627
+574
| +1,083% | +$46.9K |
|
704
PUT
Molina Healthcare
MOH
$10.2B
| $5.14M | 0.01% |
469
+351
| +297% | +$45.5K |
|
705
American Tower
AMT
$78B
| $5.14M | 0.01% |
+23,249
| New | +$5.07M |
|
706
CALL
Campbell Soup
CPB
$6.5B
| $5.13M | 0.01% |
1,094
+169
| +18% | +$7.3K |
|
707
CALL
AGNC Investment
AGNC
$12.3B
| $5.13M | 0.01% |
3,190
+2,511
| +370% | +$41.2K |
|
708
CALL
Omnicom Group
OMC
$22.8B
| $5.13M | 0.01% |
655
+529
| +420% | +$42K |
|
709
CALL
M&T Bank
MTB
$36.1B
| $5.12M | 0.01% |
324
+224
| +224% | +$35.3K |
|
710
PUT
National Healthcare
NHC
$3.53B
| $5.1M | 0.01% |
623
+59
| +10% | +$4.88K |
|
711
PUT
Martin Marietta Materials
MLM
$33.7B
| $5.1M | 0.01% |
186
-137
| -42% | -$33.9K |
|
712
PUT
Match Group
MTCH
$8.9B
| $5.09M | 0.01% |
712
-498
| -41% | -$38.8K |
|
|
713
Alphabet (Google) Class A
GOOGL
$3.92T
| $5.08M | 0.01% |
+83,280
| New | +$4.93M |
|
714
PUT
Parker-Hannifin
PH
$124B
| $5.08M | 0.01% |
281
+210
| +296% | +$35.7K |
|
|
SKX
715
CALL
DELISTED
Skechers
SKX
| $5.07M | 0.01% |
1,357
+664
| +96% | +$22.8K |
|
|
K
716
PUT
DELISTED
Kellanova
K
| $5.05M | 0.01% |
836
+35
| +4% | +$2K |
|
717
PUT
Ball Corp
BALL
$16.9B
| $5.04M | 0.01% |
692
+646
| +1,404% | +$48.1K |
|
718
PUT
Ross Stores
ROST
$76.5B
| $5.02M | 0.01% |
457
+120
| +36% | +$12.7K |
|
|
TIF
719
CALL
DELISTED
Tiffany & Co.
TIF
| $4.99M | 0.01% |
539
+79
| +17% | +$7.13K |
|
720
CALL
Vodafone
VOD
$35B
| $4.99M | 0.01% |
2,505
-74
| -3% | -$1.34K |
|
|
NLSN
721
CALL
DELISTED
Nielsen Holdings plc
NLSN
| $4.99M | 0.01% |
2,347
-2,814
| -55% | -$62.1K |
|
722
CALL
Five Below
FIVE
$11.2B
| $4.98M | 0.01% |
395
+184
| +87% | +$22.3K |
|
723
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $4.97M | 0.01% |
660
-29
| -4% | -$3.42K |
|
724
CALL
Apollo Global Management
APO
$70.2B
| $4.97M | 0.01% |
1,314
+292
| +29% | +$10.6K |
|
725
PUT
ASML
ASML
$678B
| $4.97M | 0.01% |
200
+92
| +85% | +$20.7K |
|
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.