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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
826
PUT
Target
TGT
$61.3B
| $231K | 0.02% |
1,488
+1,299
| +687% | +$104K |
|
|
B
827
PUT
Barrick Mining
B
$61.9B
| $230K | 0.02% |
478
+173
| +57% | +$1.3K |
|
828
CALL
Intuitive Surgical
ISRG
$119B
| $230K | 0.02% |
855
+333
| +64% | +$18.9K |
|
|
CMCSK
829
DELISTED
COMCAST CORP SPL A (NEW)
CMCSK
| $230K | 0.02% |
4,033
+3,091
| +328% | +$176K |
|
830
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $229K | 0.02% |
2,433
-530
| -18% | -$10.4K |
|
831
Huntsman Corp
HUN
$2.3B
| $228K | 0.02% |
23,630
+15,157
| +179% | +$261K |
|
|
JO
832
DELISTED
iPath Bloomberg Coffee Subindex Total Return ETN due June 24, 2038
JO
| $228K | 0.02% |
+11,630
| New | +$239K |
|
833
Melco Resorts & Entertainment
MLCO
$2.13B
| $227K | 0.02% |
16,544
-106,508
| -87% | -$2.05M |
|
834
Stellantis
STLA
$16.6B
| $227K | 0.02% |
26,384
+20,835
| +375% | +$199K |
|
835
CALL
Verizon
VZ
$186B
| $227K | 0.02% |
1,110
+658
| +146% | +$30.4K |
|
|
MJN
836
PUT
DELISTED
Mead Johnson Nutrition Company
MJN
| $227K | 0.02% |
199
+53
| +36% | +$4.36K |
|
|
BNY
837
Bank of New York Mellon
BNY
$108B
| $226K | 0.02% |
5,779
+183
| +3% | +$7.61K |
|
|
CAM
838
DELISTED
CAMERON INTERNATIONAL CORPORATION
CAM
| $226K | 0.02% |
+3,700
| New | +$204K |
|
839
Toronto Dominion Bank
TD
$197B
| $225K | 0.02% |
5,721
+3,771
| +193% | +$150K |
|
840
PUT
Tapestry
TPR
$28.7B
| $225K | 0.02% |
490
+384
| +362% | +$11.9K |
|
841
PUT
GSK
GSK
$101B
| $224K | 0.02% |
266
-116
| -30% | -$6.04K |
|
842
Eli Lilly
LLY
$1.05T
| $224K | 0.02% |
2,681
-2,259
| -46% | -$191K |
|
843
CALL
Procter & Gamble
PG
$342B
| $224K | 0.02% |
1,248
+783
| +168% | +$58.7K |
|
844
ProShares UltraPro S&P 500
UPRO
$5.09B
| $224K | 0.02% |
25,818
-38,646
| -60% | -$405K |
|
|
TIF
845
PUT
DELISTED
Tiffany & Co.
TIF
| $224K | 0.02% |
271
+140
| +107% | +$12.2K |
|
846
Immersion
IMMR
$213M
| $223K | 0.02% |
+19,864
| New | +$241K |
|
847
PUT
Molson Coors Class B
TAP
$7.54B
| $223K | 0.02% |
611
+187
| +44% | +$13.5K |
|
|
VMW
848
PUT
DELISTED
VMware, Inc
VMW
| $223K | 0.02% |
500
-2
| -0.4% | -$166 |
|
849
CALL
ConocoPhillips
COP
$149B
| $221K | 0.02% |
2,069
+1,625
| +366% | +$82.7K |
|
850
Ionis Pharmaceuticals
IONS
$9.47B
| $221K | 0.02% |
5,477
-45,022
| -89% | -$2.33M |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.