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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2676
CALL
Zimmer Biomet
ZBH
$17.7B
| $816K | ﹤0.01% |
6,400
-16,800
| -72% | -$1.95M |
|
2677
PUT
Companhia Siderúrgica Nacional
SID
$1.43B
| $815K | ﹤0.01% |
295,300
-137,800
| -32% | -$370K |
|
2678
Genco Shipping & Trading
GNK
$1.17B
| $814K | ﹤0.01% |
+53,007
| New | +$767K |
|
2679
CALL
Blue Owl Capital
OWL
$6.39B
| $814K | ﹤0.01% |
76,800
+2,900
| +4% | +$30.6K |
|
2680
Tandem Diabetes Care
TNDM
$1.17B
| $814K | ﹤0.01% |
+18,131
| New | +$821K |
|
2681
CALL
DaVita
DVA
$15.1B
| $813K | ﹤0.01% |
10,900
-8,900
| -45% | -$691K |
|
2682
ProShares UltraShort Yen
YCS
$34.5M
| $811K | ﹤0.01% |
30,316
+6,102
| +25% | +$190K |
|
2683
CALL
Host Hotels & Resorts
HST
$16.8B
| $810K | ﹤0.01% |
50,500
+5,600
| +12% | +$97.9K |
|
2684
CALL
Canadian National Railway
CNI
$78.3B
| $808K | ﹤0.01% |
6,800
-5,700
| -46% | -$681K |
|
2685
PUT
United Parks & Resorts
PRKS
$2.11B
| $808K | ﹤0.01% |
15,100
+4,400
| +41% | +$236K |
|
|
AAWW
2686
CALL
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $806K | ﹤0.01% |
8,000
+3,500
| +78% | +$351K |
|
2687
PUT
The GEO Group
GEO
$4.13B
| $804K | ﹤0.01% |
73,500
+20,400
| +38% | +$198K |
|
2688
CALL
MKS Inc
MKSI
$22.2B
| $804K | ﹤0.01% |
9,500
+2,700
| +40% | +$216K |
|
2689
CALL
SEI Investments
SEIC
$11.9B
| $804K | ﹤0.01% |
13,800
| – | – |
|
|
BBBY
2690
Bed Bath & Beyond
BBBY
$473M
| $802K | ﹤0.01% |
45,597
-51,434
| -53% | -$1.11M |
|
2691
PUT
Box
BOX
$4.02B
| $800K | ﹤0.01% |
25,700
-6,100
| -19% | -$174K |
|
|
SRC
2692
CALL
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $798K | ﹤0.01% |
20,000
+9,900
| +98% | +$387K |
|
2693
CALL
Fortuna Silver Mines
FSM
$2.59B
| $797K | ﹤0.01% |
212,700
+104,600
| +97% | +$345K |
|
|
HAPN
2694
PUT
Happen Inc
HAPN
$2.08B
| $797K | ﹤0.01% |
90,600
+4,500
| +5% | +$46.4K |
|
|
PDS
2695
PUT
Precision Drilling
PDS
$1.09B
| $797K | ﹤0.01% |
10,400
-800
| -7% | -$57.7K |
|
2696
S&P Global
SPGI
$126B
| $797K | ﹤0.01% |
2,381
-21,120
| -90% | -$6.96M |
|
|
RADI
2697
DELISTED
Radius Global Infrastructure, Inc. Class A Common Stock
RADI
| $794K | ﹤0.01% |
+67,179
| New | +$696K |
|
|
ONC
2698
PUT
BeOne Medicines Ltd
ONC
$33.8B
| $791K | ﹤0.01% |
+3,600
| New | +$660K |
|
2699
PUT
AGCO
AGCO
$8.78B
| $790K | ﹤0.01% |
5,700
+2,100
| +58% | +$259K |
|
2700
CALL
Dorchester Minerals
DMLP
$1.34B
| $790K | ﹤0.01% |
26,400
+15,200
| +136% | +$437K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.