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 | |
|---|---|---|---|---|---|---|
|
FL
751
CALL
DELISTED
Foot Locker
FL
| $4.71M | 0.01% |
1,091
+615
| +129% | +$24.8K |
|
752
CALL
Fox Class B
FOX
$20.7B
| $4.71M | 0.01% |
1,493
-981
| -40% | -$33.9K |
|
753
CALL
MGM Resorts International
MGM
$11.7B
| $4.71M | 0.01% |
1,698
-152
| -8% | -$4.37K |
|
754
CALL
Capri Holdings
CPRI
$1.77B
| $4.7M | 0.01% |
1,417
+290
| +26% | +$9.29K |
|
755
Workday
WDAY
$33.4B
| $4.67M | 0.01% |
27,469
+9,971
| +57% | +$1.92M |
|
756
CALL
Halliburton
HAL
$27.9B
| $4.66M | 0.01% |
2,473
-1,922
| -44% | -$39.8K |
|
757
CALL
Toronto Dominion Bank
TD
$198B
| $4.65M | 0.01% |
799
+232
| +41% | +$13.2K |
|
758
CALL
Tapestry
TPR
$28.8B
| $4.65M | 0.01% |
1,784
+1,152
| +182% | +$30.4K |
|
759
CALL
APA Corp
APA
$12.8B
| $4.63M | 0.01% |
1,809
+1,464
| +424% | +$35.1K |
|
760
PUT
Eli Lilly
LLY
$1.07T
| $4.63M | 0.01% |
414
-1,692
| -80% | -$188K |
|
761
PUT
Pultegroup
PHM
$24.5B
| $4.62M | 0.01% |
1,263
-117
| -8% | -$3.89K |
|
|
STMP
762
PUT
DELISTED
Stamps.com, Inc.
STMP
| $4.61M | 0.01% |
619
-231
| -27% | -$13.6K |
|
763
PUT
Deckers Outdoor
DECK
$13.3B
| $4.6M | 0.01% |
1,872
-30
| -2% | -$768 |
|
764
PUT
New Oriental
EDU
$7.84B
| $4.6M | 0.01% |
415
+281
| +210% | +$29.4K |
|
765
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $4.59M | 0.01% |
385
-22
| -5% | -$2.63K |
|
766
PUT
American International
AIG
$41.9B
| $4.59M | 0.01% |
824
-1,841
| -69% | -$102K |
|
|
TYNS
767
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $4.59M | 0.01% |
603
-378
| -39% | -$9.92K |
|
768
CALL
Pinduoduo
PDD
$118B
| $4.57M | 0.01% |
1,418
+1,078
| +317% | +$28.8K |
|
769
PUT
Ally Financial
ALLY
$13.1B
| $4.56M | 0.01% |
1,375
+747
| +119% | +$24.2K |
|
770
CALL
LyondellBasell Industries
LYB
$19.5B
| $4.54M | 0.01% |
507
+221
| +77% | +$18K |
|
|
BNY
771
PUT
Bank of New York Mellon
BNY
$108B
| $4.52M | 0.01% |
999
-76
| -7% | -$3.38K |
|
772
CALL
Mondelez International
MDLZ
$77.7B
| $4.51M | 0.01% |
815
-397
| -33% | -$21.7K |
|
773
PUT
Zscaler
ZS
$23B
| $4.51M | 0.01% |
954
+535
| +128% | +$38.5K |
|
774
CALL
Live Nation Entertainment
LYV
$41.2B
| $4.5M | 0.01% |
679
-76
| -10% | -$5.32K |
|
775
Gilead Sciences
GILD
$161B
| $4.5M | 0.01% |
70,958
+62,532
| +742% | +$4.09M |
|
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.